diff --git a/buildtools/build.proj b/buildtools/build.proj
index 22fde2cd4c7c..bf909c79ab0c 100644
--- a/buildtools/build.proj
+++ b/buildtools/build.proj
@@ -513,7 +513,7 @@
         <Message Text="Copying License.txt and Notice.txt to the assembly zips" />
         <Copy
             SourceFiles="../Notice.txt;../License.txt"
-            DestinationFiles="../Deployment/assemblies/net462/Notice.txt;../Deployment/assemblies/net462/License.txt"
+            DestinationFiles="../Deployment/assemblies/net472/Notice.txt;../Deployment/assemblies/net472/License.txt"
         />
         <!-- netstandard2.0 needs modified Notice with additional 3rd party dependencies -->
         <Copy
diff --git a/extensions/src/AWSSDK.Extensions.CrtIntegration/AWSSDK.Extensions.CrtIntegration.NetFramework.csproj b/extensions/src/AWSSDK.Extensions.CrtIntegration/AWSSDK.Extensions.CrtIntegration.NetFramework.csproj
index f1d9ca574315..69449a4de124 100644
--- a/extensions/src/AWSSDK.Extensions.CrtIntegration/AWSSDK.Extensions.CrtIntegration.NetFramework.csproj
+++ b/extensions/src/AWSSDK.Extensions.CrtIntegration/AWSSDK.Extensions.CrtIntegration.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
   <PropertyGroup>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <AssemblyName>AWSSDK.Extensions.CrtIntegration</AssemblyName>
     <PackageId>AWSSDK.Extensions.CrtIntegration</PackageId>
     <GenerateAssemblyTitleAttribute>false</GenerateAssemblyTitleAttribute>
diff --git a/extensions/src/AWSSDK.Extensions.CrtIntegration/AWSSDK.Extensions.CrtIntegration.nuspec b/extensions/src/AWSSDK.Extensions.CrtIntegration/AWSSDK.Extensions.CrtIntegration.nuspec
index ed3622badcc4..29b4596cca4c 100644
--- a/extensions/src/AWSSDK.Extensions.CrtIntegration/AWSSDK.Extensions.CrtIntegration.nuspec
+++ b/extensions/src/AWSSDK.Extensions.CrtIntegration/AWSSDK.Extensions.CrtIntegration.nuspec
@@ -12,13 +12,13 @@
     <tags>AWS Amazon aws-sdk-v4</tags>
     <icon>images\AWSLogo.png</icon>
     <dependencies>
-      <group targetFramework="net462">
-        <dependency id="AWSSDK.Core" version="3.7.300" />
+      <group targetFramework="net472">
+        <dependency id="AWSSDK.Core" version="4.0.0.0-preview" />
         <dependency id="AWSCRT-AUTH" version="0.4.4" />
         <dependency id="AWSCRT-CHECKSUMS" version="0.4.4" />
       </group>
       <group targetFramework="netstandard2.0">
-        <dependency id="AWSSDK.Core" version="3.7.300" />
+        <dependency id="AWSSDK.Core" version="4.0.0-preview" />
         <dependency id="AWSCRT-AUTH" version="0.4.4" />
         <dependency id="AWSCRT-CHECKSUMS" version="0.4.4" />
       </group>
@@ -28,8 +28,8 @@
   <files>
     <file src="..\..\..\sdk\nuget-content\AWSLogo.png" target="images\" />
 
-    <file src=".\bin\Release\net462\AWSSDK.Extensions.CrtIntegration.dll" target="lib\net462" />
-    <file src=".\bin\Release\net462\AWSSDK.Extensions.CrtIntegration.pdb" target="lib\net462" />
+    <file src=".\bin\Release\net472\AWSSDK.Extensions.CrtIntegration.dll" target="lib\net472" />
+    <file src=".\bin\Release\net472\AWSSDK.Extensions.CrtIntegration.pdb" target="lib\net472" />
 
     <file src=".\bin\Release\netstandard2.0\AWSSDK.Extensions.CrtIntegration.dll" target="lib\netstandard2.0"/>
     <file src=".\bin\Release\netstandard2.0\AWSSDK.Extensions.CrtIntegration.pdb" target="lib\netstandard2.0"/>
diff --git a/generator/ServiceClientGeneratorLib/Generators/NuGet/CoreNuspec.cs b/generator/ServiceClientGeneratorLib/Generators/NuGet/CoreNuspec.cs
index 124d894788eb..122e3f37118c 100644
--- a/generator/ServiceClientGeneratorLib/Generators/NuGet/CoreNuspec.cs
+++ b/generator/ServiceClientGeneratorLib/Generators/NuGet/CoreNuspec.cs
@@ -15,7 +15,7 @@ namespace ServiceClientGenerator.Generators.NuGet
     /// Class to produce the template output
     /// </summary>
     
-    #line 1 "C:\Dev\repos\aws-sdk-net\generator\ServiceClientGeneratorLib\Generators\NuGet\CoreNuspec.tt"
+    #line 1 "C:\codebase\v4\aws-sdk-net-v4\generator\ServiceClientGeneratorLib\Generators\NuGet\CoreNuspec.tt"
     [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Microsoft.VisualStudio.TextTemplating", "17.0.0.0")]
     public partial class CoreNuspec : CoreNuspecBase
     {
@@ -28,13 +28,13 @@ public virtual string TransformText()
             this.Write("\r\n<?xml version=\"1.0\" encoding=\"utf-8\"?>\r\n<package> \r\n  <metadata> \r\n    <id>AWSS" +
                     "DK.Core</id>\r\n    <title>AWSSDK - Core Runtime</title>\r\n    <version>");
             
-            #line 9 "C:\Dev\repos\aws-sdk-net\generator\ServiceClientGeneratorLib\Generators\NuGet\CoreNuspec.tt"
+            #line 9 "C:\codebase\v4\aws-sdk-net-v4\generator\ServiceClientGeneratorLib\Generators\NuGet\CoreNuspec.tt"
             this.Write(this.ToStringHelper.ToStringWithCulture(this.Session["FileVersion"]));
             
             #line default
             #line hidden
             
-            #line 9 "C:\Dev\repos\aws-sdk-net\generator\ServiceClientGeneratorLib\Generators\NuGet\CoreNuspec.tt"
+            #line 9 "C:\codebase\v4\aws-sdk-net-v4\generator\ServiceClientGeneratorLib\Generators\NuGet\CoreNuspec.tt"
             this.Write(this.ToStringHelper.ToStringWithCulture(this.Session["NuGetPreviewFlag"]));
             
             #line default
@@ -44,7 +44,7 @@ public virtual string TransformText()
                     "/language>\r\n    <license type=\"expression\">Apache-2.0</license>\r\n    <projectUrl" +
                     ">https://github.com/aws/aws-sdk-net/</projectUrl>\r\n    <tags>AWS Amazon cloud aw" +
                     "s-sdk-v4</tags>\r\n    <icon>images\\AWSLogo.png</icon>\r\n    <dependencies>\r\n      " +
-                    "<group targetFramework=\"net462\">\r\n        <dependency id=\"System.Buffers\" versio" +
+                    "<group targetFramework=\"net472\">\r\n        <dependency id=\"System.Buffers\" versio" +
                     "n=\"4.5.1\" />\r\n        <dependency id=\"System.Memory\" version=\"4.5.5\" />\r\n       " +
                     " <dependency id=\"System.Text.Json\" version=\"8.0.3\" />\r\n      </group>\r\n      <gr" +
                     "oup targetFramework=\"netstandard2.0\">\r\n        <dependency id=\"Microsoft.Bcl.Asy" +
@@ -55,9 +55,9 @@ public virtual string TransformText()
                     "rk=\"net8.0\">\r\n      </group>\t\t\r\n    </dependencies>\r\n  </metadata> \r\n  <files>\r\n" +
                     "    <file src=\"..\\..\\nuget-content\\AWSLogo.png\" target=\"images\\\" />\r\n    <file s" +
                     "rc=\"..\\..\\nuget-content\\account-management.ps1\" target=\"tools\" />\r\n\r\n    <file s" +
-                    "rc=\".\\bin\\Release\\net462\\AWSSDK.Core.dll\" target=\"lib\\net462\" />\r\n    <file src=" +
-                    "\".\\bin\\Release\\net462\\AWSSDK.Core.xml\" target=\"lib\\net462\" />\r\n    <file src=\".\\" +
-                    "bin\\Release\\net462\\AWSSDK.Core.pdb\" target=\"lib\\net462\" />\r\n\r\n    <file src=\".\\b" +
+                    "rc=\".\\bin\\Release\\net472\\AWSSDK.Core.dll\" target=\"lib\\net472\" />\r\n    <file src=" +
+                    "\".\\bin\\Release\\net472\\AWSSDK.Core.xml\" target=\"lib\\net472\" />\r\n    <file src=\".\\" +
+                    "bin\\Release\\net472\\AWSSDK.Core.pdb\" target=\"lib\\net472\" />\r\n\r\n    <file src=\".\\b" +
                     "in\\Release\\netstandard2.0\\AWSSDK.Core.dll\" target=\"lib\\netstandard2.0\"/>\r\n    <f" +
                     "ile src=\".\\bin\\Release\\netstandard2.0\\AWSSDK.Core.xml\" target=\"lib\\netstandard2." +
                     "0\"/>\r\n    <file src=\".\\bin\\Release\\netstandard2.0\\AWSSDK.Core.pdb\" target=\"lib\\n" +
diff --git a/generator/ServiceClientGeneratorLib/Generators/NuGet/CoreNuspec.tt b/generator/ServiceClientGeneratorLib/Generators/NuGet/CoreNuspec.tt
index 0e5d70091bf4..e54f4d7e2604 100644
--- a/generator/ServiceClientGeneratorLib/Generators/NuGet/CoreNuspec.tt
+++ b/generator/ServiceClientGeneratorLib/Generators/NuGet/CoreNuspec.tt
@@ -15,7 +15,7 @@
     <tags>AWS Amazon cloud aws-sdk-v4</tags>
     <icon>images\AWSLogo.png</icon>
     <dependencies>
-      <group targetFramework="net462">
+      <group targetFramework="net472">
         <dependency id="System.Buffers" version="4.5.1" />
         <dependency id="System.Memory" version="4.5.5" />
         <dependency id="System.Text.Json" version="8.0.3" />
@@ -36,9 +36,9 @@
     <file src="..\..\nuget-content\AWSLogo.png" target="images\" />
     <file src="..\..\nuget-content\account-management.ps1" target="tools" />
 
-    <file src=".\bin\Release\net462\AWSSDK.Core.dll" target="lib\net462" />
-    <file src=".\bin\Release\net462\AWSSDK.Core.xml" target="lib\net462" />
-    <file src=".\bin\Release\net462\AWSSDK.Core.pdb" target="lib\net462" />
+    <file src=".\bin\Release\net472\AWSSDK.Core.dll" target="lib\net472" />
+    <file src=".\bin\Release\net472\AWSSDK.Core.xml" target="lib\net472" />
+    <file src=".\bin\Release\net472\AWSSDK.Core.pdb" target="lib\net472" />
 
     <file src=".\bin\Release\netstandard2.0\AWSSDK.Core.dll" target="lib\netstandard2.0"/>
     <file src=".\bin\Release\netstandard2.0\AWSSDK.Core.xml" target="lib\netstandard2.0"/>
diff --git a/generator/ServiceClientGeneratorLib/Generators/NuGet/Nuspec.cs b/generator/ServiceClientGeneratorLib/Generators/NuGet/Nuspec.cs
index b56d1b96ccb5..1ff5267919a6 100644
--- a/generator/ServiceClientGeneratorLib/Generators/NuGet/Nuspec.cs
+++ b/generator/ServiceClientGeneratorLib/Generators/NuGet/Nuspec.cs
@@ -19,7 +19,7 @@ namespace ServiceClientGenerator.Generators.NuGet
     /// Class to produce the template output
     /// </summary>
     
-    #line 1 "C:\Dev\repos\aws-sdk-net\generator\ServiceClientGeneratorLib\Generators\NuGet\Nuspec.tt"
+    #line 1 "C:\codebase\v4\aws-sdk-net-v4\generator\ServiceClientGeneratorLib\Generators\NuGet\Nuspec.tt"
     [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Microsoft.VisualStudio.TextTemplating", "17.0.0.0")]
     public partial class Nuspec : NuspecBase
     {
@@ -31,34 +31,34 @@ public virtual string TransformText()
         {
             this.Write("<?xml version=\"1.0\" encoding=\"utf-8\"?>\r\n<package> \r\n  <metadata> \r\n    <id>");
             
-            #line 10 "C:\Dev\repos\aws-sdk-net\generator\ServiceClientGeneratorLib\Generators\NuGet\Nuspec.tt"
+            #line 10 "C:\codebase\v4\aws-sdk-net-v4\generator\ServiceClientGeneratorLib\Generators\NuGet\Nuspec.tt"
             this.Write(this.ToStringHelper.ToStringWithCulture(this.Session["AssemblyName"]));
             
             #line default
             #line hidden
             this.Write("</id>\r\n    <title>");
             
-            #line 11 "C:\Dev\repos\aws-sdk-net\generator\ServiceClientGeneratorLib\Generators\NuGet\Nuspec.tt"
+            #line 11 "C:\codebase\v4\aws-sdk-net-v4\generator\ServiceClientGeneratorLib\Generators\NuGet\Nuspec.tt"
             this.Write(this.ToStringHelper.ToStringWithCulture(this.Session["NuGetTitle"]));
             
             #line default
             #line hidden
             this.Write("</title>\r\n    <version>");
             
-            #line 12 "C:\Dev\repos\aws-sdk-net\generator\ServiceClientGeneratorLib\Generators\NuGet\Nuspec.tt"
+            #line 12 "C:\codebase\v4\aws-sdk-net-v4\generator\ServiceClientGeneratorLib\Generators\NuGet\Nuspec.tt"
             this.Write(this.ToStringHelper.ToStringWithCulture(this.Session["AssemblyVersion"]));
             
             #line default
             #line hidden
             
-            #line 12 "C:\Dev\repos\aws-sdk-net\generator\ServiceClientGeneratorLib\Generators\NuGet\Nuspec.tt"
+            #line 12 "C:\codebase\v4\aws-sdk-net-v4\generator\ServiceClientGeneratorLib\Generators\NuGet\Nuspec.tt"
             this.Write(this.ToStringHelper.ToStringWithCulture(this.Session["NuGetPreviewFlag"]));
             
             #line default
             #line hidden
             this.Write("</version> \r\n    <authors>Amazon Web Services</authors>\r\n    <description>");
             
-            #line 14 "C:\Dev\repos\aws-sdk-net\generator\ServiceClientGeneratorLib\Generators\NuGet\Nuspec.tt"
+            #line 14 "C:\codebase\v4\aws-sdk-net-v4\generator\ServiceClientGeneratorLib\Generators\NuGet\Nuspec.tt"
             this.Write(this.ToStringHelper.ToStringWithCulture(this.Session["AssemblyDescription"]));
             
             #line default
@@ -67,21 +67,21 @@ public virtual string TransformText()
                     "ache-2.0</license>\r\n    <projectUrl>https://github.com/aws/aws-sdk-net/</project" +
                     "Url>\r\n    <tags>AWS Amazon cloud ");
             
-            #line 18 "C:\Dev\repos\aws-sdk-net\generator\ServiceClientGeneratorLib\Generators\NuGet\Nuspec.tt"
+            #line 18 "C:\codebase\v4\aws-sdk-net-v4\generator\ServiceClientGeneratorLib\Generators\NuGet\Nuspec.tt"
             this.Write(this.ToStringHelper.ToStringWithCulture(this.Session["BaseName"]));
             
             #line default
             #line hidden
             this.Write(" aws-sdk-v4");
             
-            #line 18 "C:\Dev\repos\aws-sdk-net\generator\ServiceClientGeneratorLib\Generators\NuGet\Nuspec.tt"
+            #line 18 "C:\codebase\v4\aws-sdk-net-v4\generator\ServiceClientGeneratorLib\Generators\NuGet\Nuspec.tt"
             this.Write(this.ToStringHelper.ToStringWithCulture(this.Session["ExtraTags"]));
             
             #line default
             #line hidden
             this.Write("</tags>\r\n    <icon>images\\AWSLogo.png</icon>\r\n");
             
-            #line 20 "C:\Dev\repos\aws-sdk-net\generator\ServiceClientGeneratorLib\Generators\NuGet\Nuspec.tt"
+            #line 20 "C:\codebase\v4\aws-sdk-net-v4\generator\ServiceClientGeneratorLib\Generators\NuGet\Nuspec.tt"
  
     if (bool.Parse(this.Session["requireLicenseAcceptance"].ToString()))
 	{
@@ -90,14 +90,14 @@ public virtual string TransformText()
             #line hidden
             this.Write("    <requireLicenseAcceptance>");
             
-            #line 23 "C:\Dev\repos\aws-sdk-net\generator\ServiceClientGeneratorLib\Generators\NuGet\Nuspec.tt"
+            #line 23 "C:\codebase\v4\aws-sdk-net-v4\generator\ServiceClientGeneratorLib\Generators\NuGet\Nuspec.tt"
             this.Write(this.ToStringHelper.ToStringWithCulture(this.Session["requireLicenseAcceptance"]));
             
             #line default
             #line hidden
             this.Write("</requireLicenseAcceptance>\r\n");
             
-            #line 24 "C:\Dev\repos\aws-sdk-net\generator\ServiceClientGeneratorLib\Generators\NuGet\Nuspec.tt"
+            #line 24 "C:\codebase\v4\aws-sdk-net-v4\generator\ServiceClientGeneratorLib\Generators\NuGet\Nuspec.tt"
  
 	}
 
@@ -106,7 +106,7 @@ public virtual string TransformText()
             #line hidden
             this.Write("    <dependencies>\r\n");
             
-            #line 28 "C:\Dev\repos\aws-sdk-net\generator\ServiceClientGeneratorLib\Generators\NuGet\Nuspec.tt"
+            #line 28 "C:\codebase\v4\aws-sdk-net-v4\generator\ServiceClientGeneratorLib\Generators\NuGet\Nuspec.tt"
 
 	if(this.Session.ContainsKey("NugetDependencies"))
     {
@@ -121,14 +121,14 @@ public virtual string TransformText()
             #line hidden
             this.Write("\t\t\t\r\n      <group targetFramework=\"");
             
-            #line 37 "C:\Dev\repos\aws-sdk-net\generator\ServiceClientGeneratorLib\Generators\NuGet\Nuspec.tt"
+            #line 37 "C:\codebase\v4\aws-sdk-net-v4\generator\ServiceClientGeneratorLib\Generators\NuGet\Nuspec.tt"
             this.Write(this.ToStringHelper.ToStringWithCulture(targetFramework));
             
             #line default
             #line hidden
             this.Write("\">\r\n");
             
-            #line 38 "C:\Dev\repos\aws-sdk-net\generator\ServiceClientGeneratorLib\Generators\NuGet\Nuspec.tt"
+            #line 38 "C:\codebase\v4\aws-sdk-net-v4\generator\ServiceClientGeneratorLib\Generators\NuGet\Nuspec.tt"
 
             foreach(var dependency in dependencyList.Value)
             {
@@ -138,21 +138,21 @@ public virtual string TransformText()
             #line hidden
             this.Write("        <dependency id=\"");
             
-            #line 42 "C:\Dev\repos\aws-sdk-net\generator\ServiceClientGeneratorLib\Generators\NuGet\Nuspec.tt"
+            #line 42 "C:\codebase\v4\aws-sdk-net-v4\generator\ServiceClientGeneratorLib\Generators\NuGet\Nuspec.tt"
             this.Write(this.ToStringHelper.ToStringWithCulture(dependency.Name));
             
             #line default
             #line hidden
             this.Write("\" version=\"");
             
-            #line 42 "C:\Dev\repos\aws-sdk-net\generator\ServiceClientGeneratorLib\Generators\NuGet\Nuspec.tt"
+            #line 42 "C:\codebase\v4\aws-sdk-net-v4\generator\ServiceClientGeneratorLib\Generators\NuGet\Nuspec.tt"
             this.Write(this.ToStringHelper.ToStringWithCulture(dependency.Version));
             
             #line default
             #line hidden
             this.Write("\" />\r\n");
             
-            #line 43 "C:\Dev\repos\aws-sdk-net\generator\ServiceClientGeneratorLib\Generators\NuGet\Nuspec.tt"
+            #line 43 "C:\codebase\v4\aws-sdk-net-v4\generator\ServiceClientGeneratorLib\Generators\NuGet\Nuspec.tt"
 		
             }
 
@@ -160,7 +160,7 @@ public virtual string TransformText()
             #line default
             #line hidden
             
-            #line 46 "C:\Dev\repos\aws-sdk-net\generator\ServiceClientGeneratorLib\Generators\NuGet\Nuspec.tt"
+            #line 46 "C:\codebase\v4\aws-sdk-net-v4\generator\ServiceClientGeneratorLib\Generators\NuGet\Nuspec.tt"
 
             foreach(var awsDependencyKVP in ((IDictionary<string, string>)this.Session["AWSDependencies"]))
             {
@@ -170,21 +170,21 @@ public virtual string TransformText()
             #line hidden
             this.Write("        <dependency id=\"");
             
-            #line 50 "C:\Dev\repos\aws-sdk-net\generator\ServiceClientGeneratorLib\Generators\NuGet\Nuspec.tt"
+            #line 50 "C:\codebase\v4\aws-sdk-net-v4\generator\ServiceClientGeneratorLib\Generators\NuGet\Nuspec.tt"
             this.Write(this.ToStringHelper.ToStringWithCulture(awsDependencyKVP.Key));
             
             #line default
             #line hidden
             this.Write("\" version=\"");
             
-            #line 50 "C:\Dev\repos\aws-sdk-net\generator\ServiceClientGeneratorLib\Generators\NuGet\Nuspec.tt"
+            #line 50 "C:\codebase\v4\aws-sdk-net-v4\generator\ServiceClientGeneratorLib\Generators\NuGet\Nuspec.tt"
             this.Write(this.ToStringHelper.ToStringWithCulture(awsDependencyKVP.Value));
             
             #line default
             #line hidden
             this.Write("\" />\r\n");
             
-            #line 51 "C:\Dev\repos\aws-sdk-net\generator\ServiceClientGeneratorLib\Generators\NuGet\Nuspec.tt"
+            #line 51 "C:\codebase\v4\aws-sdk-net-v4\generator\ServiceClientGeneratorLib\Generators\NuGet\Nuspec.tt"
 
             }
 
@@ -193,7 +193,7 @@ public virtual string TransformText()
             #line hidden
             this.Write("      </group>\r\n");
             
-            #line 55 "C:\Dev\repos\aws-sdk-net\generator\ServiceClientGeneratorLib\Generators\NuGet\Nuspec.tt"
+            #line 55 "C:\codebase\v4\aws-sdk-net-v4\generator\ServiceClientGeneratorLib\Generators\NuGet\Nuspec.tt"
 
 		}
 	}	
@@ -203,7 +203,7 @@ public virtual string TransformText()
             #line hidden
             this.Write("      <group>\r\n");
             
-            #line 60 "C:\Dev\repos\aws-sdk-net\generator\ServiceClientGeneratorLib\Generators\NuGet\Nuspec.tt"
+            #line 60 "C:\codebase\v4\aws-sdk-net-v4\generator\ServiceClientGeneratorLib\Generators\NuGet\Nuspec.tt"
 
     foreach(var awsDependencyKVP in ((IDictionary<string, string>)this.Session["AWSDependencies"]))
     {
@@ -213,21 +213,21 @@ public virtual string TransformText()
             #line hidden
             this.Write("        <dependency id=\"");
             
-            #line 64 "C:\Dev\repos\aws-sdk-net\generator\ServiceClientGeneratorLib\Generators\NuGet\Nuspec.tt"
+            #line 64 "C:\codebase\v4\aws-sdk-net-v4\generator\ServiceClientGeneratorLib\Generators\NuGet\Nuspec.tt"
             this.Write(this.ToStringHelper.ToStringWithCulture(awsDependencyKVP.Key));
             
             #line default
             #line hidden
             this.Write("\" version=\"");
             
-            #line 64 "C:\Dev\repos\aws-sdk-net\generator\ServiceClientGeneratorLib\Generators\NuGet\Nuspec.tt"
+            #line 64 "C:\codebase\v4\aws-sdk-net-v4\generator\ServiceClientGeneratorLib\Generators\NuGet\Nuspec.tt"
             this.Write(this.ToStringHelper.ToStringWithCulture(awsDependencyKVP.Value));
             
             #line default
             #line hidden
             this.Write("\" />\r\n");
             
-            #line 65 "C:\Dev\repos\aws-sdk-net\generator\ServiceClientGeneratorLib\Generators\NuGet\Nuspec.tt"
+            #line 65 "C:\codebase\v4\aws-sdk-net-v4\generator\ServiceClientGeneratorLib\Generators\NuGet\Nuspec.tt"
 
     }
 
@@ -238,7 +238,7 @@ public virtual string TransformText()
                     "\\..\\..\\nuget-content\\AWSLogo.png\" target=\"images\\\" />\r\n    <file src=\"..\\..\\..\\c" +
                     "ode-analysis\\ServiceAnalysis\\");
             
-            #line 73 "C:\Dev\repos\aws-sdk-net\generator\ServiceClientGeneratorLib\Generators\NuGet\Nuspec.tt"
+            #line 73 "C:\codebase\v4\aws-sdk-net-v4\generator\ServiceClientGeneratorLib\Generators\NuGet\Nuspec.tt"
             this.Write(this.ToStringHelper.ToStringWithCulture(this.Session["CodeAnalysisServiceFolder"]));
             
             #line default
@@ -246,30 +246,30 @@ public virtual string TransformText()
             this.Write(@"\bin\Release\*.dll"" target=""analyzers\dotnet\cs"" exclude=""**\Microsoft.CodeAnalysis.*;**\System.Collections.Immutable.*;**\System.Reflection.Metadata.*;**\System.Composition.*"" />
     <file src=""..\..\..\code-analysis\NuGetInstallScripts\*.ps1"" target=""tools\"" />
 
-    <file src="".\bin\Release\net462\");
+    <file src="".\bin\Release\net472\");
             
-            #line 76 "C:\Dev\repos\aws-sdk-net\generator\ServiceClientGeneratorLib\Generators\NuGet\Nuspec.tt"
+            #line 76 "C:\codebase\v4\aws-sdk-net-v4\generator\ServiceClientGeneratorLib\Generators\NuGet\Nuspec.tt"
             this.Write(this.ToStringHelper.ToStringWithCulture(this.Session["AssemblyName"]));
             
             #line default
             #line hidden
-            this.Write(".dll\" target=\"lib\\net462\" />\r\n    <file src=\".\\bin\\Release\\net462\\");
+            this.Write(".dll\" target=\"lib\\net472\" />\r\n    <file src=\".\\bin\\Release\\net472\\");
             
-            #line 77 "C:\Dev\repos\aws-sdk-net\generator\ServiceClientGeneratorLib\Generators\NuGet\Nuspec.tt"
+            #line 77 "C:\codebase\v4\aws-sdk-net-v4\generator\ServiceClientGeneratorLib\Generators\NuGet\Nuspec.tt"
             this.Write(this.ToStringHelper.ToStringWithCulture(this.Session["AssemblyName"]));
             
             #line default
             #line hidden
-            this.Write(".xml\" target=\"lib\\net462\" />\r\n    <file src=\".\\bin\\Release\\net462\\");
+            this.Write(".xml\" target=\"lib\\net472\" />\r\n    <file src=\".\\bin\\Release\\net472\\");
             
-            #line 78 "C:\Dev\repos\aws-sdk-net\generator\ServiceClientGeneratorLib\Generators\NuGet\Nuspec.tt"
+            #line 78 "C:\codebase\v4\aws-sdk-net-v4\generator\ServiceClientGeneratorLib\Generators\NuGet\Nuspec.tt"
             this.Write(this.ToStringHelper.ToStringWithCulture(this.Session["AssemblyName"]));
             
             #line default
             #line hidden
-            this.Write(".pdb\" target=\"lib\\net462\" />\r\n\r\n");
+            this.Write(".pdb\" target=\"lib\\net472\" />\r\n\r\n");
             
-            #line 80 "C:\Dev\repos\aws-sdk-net\generator\ServiceClientGeneratorLib\Generators\NuGet\Nuspec.tt"
+            #line 80 "C:\codebase\v4\aws-sdk-net-v4\generator\ServiceClientGeneratorLib\Generators\NuGet\Nuspec.tt"
 	
 	if(Convert.ToBoolean(this.Session["NetStandardSupport"]))
 	{
@@ -279,7 +279,7 @@ public virtual string TransformText()
             #line hidden
             this.Write("    <file src=\".\\bin\\Release\\netstandard2.0\\");
             
-            #line 84 "C:\Dev\repos\aws-sdk-net\generator\ServiceClientGeneratorLib\Generators\NuGet\Nuspec.tt"
+            #line 84 "C:\codebase\v4\aws-sdk-net-v4\generator\ServiceClientGeneratorLib\Generators\NuGet\Nuspec.tt"
             this.Write(this.ToStringHelper.ToStringWithCulture(this.Session["AssemblyName"]));
             
             #line default
@@ -287,7 +287,7 @@ public virtual string TransformText()
             this.Write(".dll\" target=\"lib\\netstandard2.0\" />\r\n    <file src=\".\\bin\\Release\\netstandard2.0" +
                     "\\");
             
-            #line 85 "C:\Dev\repos\aws-sdk-net\generator\ServiceClientGeneratorLib\Generators\NuGet\Nuspec.tt"
+            #line 85 "C:\codebase\v4\aws-sdk-net-v4\generator\ServiceClientGeneratorLib\Generators\NuGet\Nuspec.tt"
             this.Write(this.ToStringHelper.ToStringWithCulture(this.Session["AssemblyName"]));
             
             #line default
@@ -295,7 +295,7 @@ public virtual string TransformText()
             this.Write(".xml\" target=\"lib\\netstandard2.0\" />\r\n    <file src=\".\\bin\\Release\\netstandard2.0" +
                     "\\");
             
-            #line 86 "C:\Dev\repos\aws-sdk-net\generator\ServiceClientGeneratorLib\Generators\NuGet\Nuspec.tt"
+            #line 86 "C:\codebase\v4\aws-sdk-net-v4\generator\ServiceClientGeneratorLib\Generators\NuGet\Nuspec.tt"
             this.Write(this.ToStringHelper.ToStringWithCulture(this.Session["AssemblyName"]));
             
             #line default
@@ -303,49 +303,49 @@ public virtual string TransformText()
             this.Write(".pdb\" target=\"lib\\netstandard2.0\" />\r\n\r\n    <file src=\".\\bin\\Release\\netcoreapp3." +
                     "1\\");
             
-            #line 88 "C:\Dev\repos\aws-sdk-net\generator\ServiceClientGeneratorLib\Generators\NuGet\Nuspec.tt"
+            #line 88 "C:\codebase\v4\aws-sdk-net-v4\generator\ServiceClientGeneratorLib\Generators\NuGet\Nuspec.tt"
             this.Write(this.ToStringHelper.ToStringWithCulture(this.Session["AssemblyName"]));
             
             #line default
             #line hidden
             this.Write(".dll\" target=\"lib\\netcoreapp3.1\" />\r\n    <file src=\".\\bin\\Release\\netcoreapp3.1\\");
             
-            #line 89 "C:\Dev\repos\aws-sdk-net\generator\ServiceClientGeneratorLib\Generators\NuGet\Nuspec.tt"
+            #line 89 "C:\codebase\v4\aws-sdk-net-v4\generator\ServiceClientGeneratorLib\Generators\NuGet\Nuspec.tt"
             this.Write(this.ToStringHelper.ToStringWithCulture(this.Session["AssemblyName"]));
             
             #line default
             #line hidden
             this.Write(".xml\" target=\"lib\\netcoreapp3.1\" />\r\n    <file src=\".\\bin\\Release\\netcoreapp3.1\\");
             
-            #line 90 "C:\Dev\repos\aws-sdk-net\generator\ServiceClientGeneratorLib\Generators\NuGet\Nuspec.tt"
+            #line 90 "C:\codebase\v4\aws-sdk-net-v4\generator\ServiceClientGeneratorLib\Generators\NuGet\Nuspec.tt"
             this.Write(this.ToStringHelper.ToStringWithCulture(this.Session["AssemblyName"]));
             
             #line default
             #line hidden
             this.Write(".pdb\" target=\"lib\\netcoreapp3.1\" />\r\n\r\n    <file src=\"");
             
-            #line 92 "C:\Dev\repos\aws-sdk-net\generator\ServiceClientGeneratorLib\Generators\NuGet\Nuspec.tt"
+            #line 92 "C:\codebase\v4\aws-sdk-net-v4\generator\ServiceClientGeneratorLib\Generators\NuGet\Nuspec.tt"
             this.Write(this.ToStringHelper.ToStringWithCulture(Path.Combine(".", "bin", "Release", "net8.0", (string)this.Session["AssemblyName"] + ".dll")));
             
             #line default
             #line hidden
             this.Write("\" target=\"lib\\net8.0\" />\r\n    <file src=\"");
             
-            #line 93 "C:\Dev\repos\aws-sdk-net\generator\ServiceClientGeneratorLib\Generators\NuGet\Nuspec.tt"
+            #line 93 "C:\codebase\v4\aws-sdk-net-v4\generator\ServiceClientGeneratorLib\Generators\NuGet\Nuspec.tt"
             this.Write(this.ToStringHelper.ToStringWithCulture(Path.Combine(".", "bin", "Release", "net8.0", (string)this.Session["AssemblyName"] + ".xml")));
             
             #line default
             #line hidden
             this.Write("\" target=\"lib\\net8.0\" />\r\n    <file src=\"");
             
-            #line 94 "C:\Dev\repos\aws-sdk-net\generator\ServiceClientGeneratorLib\Generators\NuGet\Nuspec.tt"
+            #line 94 "C:\codebase\v4\aws-sdk-net-v4\generator\ServiceClientGeneratorLib\Generators\NuGet\Nuspec.tt"
             this.Write(this.ToStringHelper.ToStringWithCulture(Path.Combine(".", "bin", "Release", "net8.0", (string)this.Session["AssemblyName"] + ".pdb")));
             
             #line default
             #line hidden
             this.Write("\" target=\"lib\\net8.0\" />\r\n");
             
-            #line 95 "C:\Dev\repos\aws-sdk-net\generator\ServiceClientGeneratorLib\Generators\NuGet\Nuspec.tt"
+            #line 95 "C:\codebase\v4\aws-sdk-net-v4\generator\ServiceClientGeneratorLib\Generators\NuGet\Nuspec.tt"
 
 	}
 
diff --git a/generator/ServiceClientGeneratorLib/Generators/NuGet/Nuspec.tt b/generator/ServiceClientGeneratorLib/Generators/NuGet/Nuspec.tt
index d03867cb3595..02fc0756b060 100644
--- a/generator/ServiceClientGeneratorLib/Generators/NuGet/Nuspec.tt
+++ b/generator/ServiceClientGeneratorLib/Generators/NuGet/Nuspec.tt
@@ -73,9 +73,9 @@
     <file src="..\..\..\code-analysis\ServiceAnalysis\\<#=this.Session["CodeAnalysisServiceFolder"]#>\bin\Release\*.dll" target="analyzers\dotnet\cs" exclude="**\Microsoft.CodeAnalysis.*;**\System.Collections.Immutable.*;**\System.Reflection.Metadata.*;**\System.Composition.*" />
     <file src="..\..\..\code-analysis\NuGetInstallScripts\*.ps1" target="tools\" />
 
-    <file src=".\bin\Release\net462\\<#=this.Session["AssemblyName"]#>.dll" target="lib\net462" />
-    <file src=".\bin\Release\net462\\<#=this.Session["AssemblyName"]#>.xml" target="lib\net462" />
-    <file src=".\bin\Release\net462\\<#=this.Session["AssemblyName"]#>.pdb" target="lib\net462" />
+    <file src=".\bin\Release\net472\\<#=this.Session["AssemblyName"]#>.dll" target="lib\net472" />
+    <file src=".\bin\Release\net472\\<#=this.Session["AssemblyName"]#>.xml" target="lib\net472" />
+    <file src=".\bin\Release\net472\\<#=this.Session["AssemblyName"]#>.pdb" target="lib\net472" />
 
 <#	
 	if(Convert.ToBoolean(this.Session["NetStandardSupport"]))
diff --git a/generator/ServiceClientGeneratorLib/Generators/ProjectFiles/VS2017ProjectFile.cs b/generator/ServiceClientGeneratorLib/Generators/ProjectFiles/VS2017ProjectFile.cs
index 0dff6f7e6676..193176db77aa 100644
--- a/generator/ServiceClientGeneratorLib/Generators/ProjectFiles/VS2017ProjectFile.cs
+++ b/generator/ServiceClientGeneratorLib/Generators/ProjectFiles/VS2017ProjectFile.cs
@@ -16,7 +16,7 @@ namespace ServiceClientGenerator.Generators.ProjectFiles
     /// Class to produce the template output
     /// </summary>
     
-    #line 1 "C:\codebase\v3\AWSDotNetPublic\generator\ServiceClientGeneratorLib\Generators\ProjectFiles\VS2017ProjectFile.tt"
+    #line 1 "C:\codebase\v4\aws-sdk-net-v4\generator\ServiceClientGeneratorLib\Generators\ProjectFiles\VS2017ProjectFile.tt"
     [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Microsoft.VisualStudio.TextTemplating", "17.0.0.0")]
     public partial class VS2017ProjectFile : VS2017ProjectFileBase
     {
@@ -29,7 +29,7 @@ public virtual string TransformText()
             this.Write("<Project Sdk=\"Microsoft.NET.Sdk\">\r\n  <PropertyGroup>\r\n   <RunAnalyzersDuringBuild" +
                     " Condition=\"\'$(RunAnalyzersDuringBuild)\'==\'\'\">true</RunAnalyzersDuringBuild>\r\n");
             
-            #line 7 "C:\codebase\v3\AWSDotNetPublic\generator\ServiceClientGeneratorLib\Generators\ProjectFiles\VS2017ProjectFile.tt"
+            #line 7 "C:\codebase\v4\aws-sdk-net-v4\generator\ServiceClientGeneratorLib\Generators\ProjectFiles\VS2017ProjectFile.tt"
 
     if (this.Project.TargetFrameworks.Count() == 1)
     {
@@ -39,14 +39,14 @@ public virtual string TransformText()
             #line hidden
             this.Write("    <TargetFramework>");
             
-            #line 11 "C:\codebase\v3\AWSDotNetPublic\generator\ServiceClientGeneratorLib\Generators\ProjectFiles\VS2017ProjectFile.tt"
+            #line 11 "C:\codebase\v4\aws-sdk-net-v4\generator\ServiceClientGeneratorLib\Generators\ProjectFiles\VS2017ProjectFile.tt"
             this.Write(this.ToStringHelper.ToStringWithCulture(this.Project.TargetFrameworks.Single()));
             
             #line default
             #line hidden
             this.Write("</TargetFramework>\r\n");
             
-            #line 12 "C:\codebase\v3\AWSDotNetPublic\generator\ServiceClientGeneratorLib\Generators\ProjectFiles\VS2017ProjectFile.tt"
+            #line 12 "C:\codebase\v4\aws-sdk-net-v4\generator\ServiceClientGeneratorLib\Generators\ProjectFiles\VS2017ProjectFile.tt"
 
     }
     else
@@ -57,14 +57,14 @@ public virtual string TransformText()
             #line hidden
             this.Write("    <TargetFrameworks>");
             
-            #line 17 "C:\codebase\v3\AWSDotNetPublic\generator\ServiceClientGeneratorLib\Generators\ProjectFiles\VS2017ProjectFile.tt"
+            #line 17 "C:\codebase\v4\aws-sdk-net-v4\generator\ServiceClientGeneratorLib\Generators\ProjectFiles\VS2017ProjectFile.tt"
             this.Write(this.ToStringHelper.ToStringWithCulture(string.Join(";", this.Project.TargetFrameworks)));
             
             #line default
             #line hidden
             this.Write("</TargetFrameworks>\r\n");
             
-            #line 19 "C:\codebase\v3\AWSDotNetPublic\generator\ServiceClientGeneratorLib\Generators\ProjectFiles\VS2017ProjectFile.tt"
+            #line 19 "C:\codebase\v4\aws-sdk-net-v4\generator\ServiceClientGeneratorLib\Generators\ProjectFiles\VS2017ProjectFile.tt"
 
     }
 
@@ -73,14 +73,14 @@ public virtual string TransformText()
             #line hidden
             this.Write("    <DefineConstants>$(DefineConstants);");
             
-            #line 22 "C:\codebase\v3\AWSDotNetPublic\generator\ServiceClientGeneratorLib\Generators\ProjectFiles\VS2017ProjectFile.tt"
+            #line 22 "C:\codebase\v4\aws-sdk-net-v4\generator\ServiceClientGeneratorLib\Generators\ProjectFiles\VS2017ProjectFile.tt"
             this.Write(this.ToStringHelper.ToStringWithCulture(string.Join(";", this.Project.DefineConstants)));
             
             #line default
             #line hidden
             this.Write("</DefineConstants>\r\n");
             
-            #line 24 "C:\codebase\v3\AWSDotNetPublic\generator\ServiceClientGeneratorLib\Generators\ProjectFiles\VS2017ProjectFile.tt"
+            #line 24 "C:\codebase\v4\aws-sdk-net-v4\generator\ServiceClientGeneratorLib\Generators\ProjectFiles\VS2017ProjectFile.tt"
 
     if (this.Project.TargetFrameworks.Contains("netstandard2.0"))
     {
@@ -91,7 +91,7 @@ public virtual string TransformText()
             this.Write("    <DefineConstants Condition=\"\'$(TargetFramework)\' == \'netstandard2.0\'\">$(Defin" +
                     "eConstants);NETSTANDARD20;AWS_ASYNC_ENUMERABLES_API</DefineConstants>\r\n");
             
-            #line 29 "C:\codebase\v3\AWSDotNetPublic\generator\ServiceClientGeneratorLib\Generators\ProjectFiles\VS2017ProjectFile.tt"
+            #line 29 "C:\codebase\v4\aws-sdk-net-v4\generator\ServiceClientGeneratorLib\Generators\ProjectFiles\VS2017ProjectFile.tt"
 
     }
     if (this.Project.TargetFrameworks.Contains("netcoreapp3.1"))
@@ -103,7 +103,7 @@ public virtual string TransformText()
             this.Write("    <DefineConstants Condition=\"\'$(TargetFramework)\' == \'netcoreapp3.1\'\">$(Define" +
                     "Constants);AWS_ASYNC_ENUMERABLES_API</DefineConstants>\r\n");
             
-            #line 35 "C:\codebase\v3\AWSDotNetPublic\generator\ServiceClientGeneratorLib\Generators\ProjectFiles\VS2017ProjectFile.tt"
+            #line 35 "C:\codebase\v4\aws-sdk-net-v4\generator\ServiceClientGeneratorLib\Generators\ProjectFiles\VS2017ProjectFile.tt"
 
     }
     if (this.Project.TargetFrameworks.Contains("net8.0"))
@@ -115,7 +115,7 @@ public virtual string TransformText()
             this.Write("    <DefineConstants Condition=\"\'$(TargetFramework)\' == \'net8.0\'\">$(DefineConstan" +
                     "ts);AWS_ASYNC_ENUMERABLES_API</DefineConstants>\r\n");
             
-            #line 41 "C:\codebase\v3\AWSDotNetPublic\generator\ServiceClientGeneratorLib\Generators\ProjectFiles\VS2017ProjectFile.tt"
+            #line 41 "C:\codebase\v4\aws-sdk-net-v4\generator\ServiceClientGeneratorLib\Generators\ProjectFiles\VS2017ProjectFile.tt"
 
     }
 
@@ -125,14 +125,14 @@ public virtual string TransformText()
             this.Write("    <DebugType>portable</DebugType>\r\n    <GenerateDocumentationFile>true</Generat" +
                     "eDocumentationFile>\r\n    <AssemblyName>");
             
-            #line 46 "C:\codebase\v3\AWSDotNetPublic\generator\ServiceClientGeneratorLib\Generators\ProjectFiles\VS2017ProjectFile.tt"
+            #line 46 "C:\codebase\v4\aws-sdk-net-v4\generator\ServiceClientGeneratorLib\Generators\ProjectFiles\VS2017ProjectFile.tt"
             this.Write(this.ToStringHelper.ToStringWithCulture(this.Project.AssemblyName));
             
             #line default
             #line hidden
             this.Write("</AssemblyName>\r\n    <PackageId>");
             
-            #line 47 "C:\codebase\v3\AWSDotNetPublic\generator\ServiceClientGeneratorLib\Generators\ProjectFiles\VS2017ProjectFile.tt"
+            #line 47 "C:\codebase\v4\aws-sdk-net-v4\generator\ServiceClientGeneratorLib\Generators\ProjectFiles\VS2017ProjectFile.tt"
             this.Write(this.ToStringHelper.ToStringWithCulture(this.Project.AssemblyName));
             
             #line default
@@ -152,7 +152,7 @@ public virtual string TransformText()
 
 ");
             
-            #line 60 "C:\codebase\v3\AWSDotNetPublic\generator\ServiceClientGeneratorLib\Generators\ProjectFiles\VS2017ProjectFile.tt"
+            #line 60 "C:\codebase\v4\aws-sdk-net-v4\generator\ServiceClientGeneratorLib\Generators\ProjectFiles\VS2017ProjectFile.tt"
 
     if (!string.IsNullOrEmpty(this.Project.FrameworkPathOverride))
     {
@@ -163,14 +163,14 @@ public virtual string TransformText()
             this.Write("    <!-- workaround per https://github.com/Microsoft/msbuild/issues/1333 -->\r\n   " +
                     " <FrameworkPathOverride>");
             
-            #line 65 "C:\codebase\v3\AWSDotNetPublic\generator\ServiceClientGeneratorLib\Generators\ProjectFiles\VS2017ProjectFile.tt"
+            #line 65 "C:\codebase\v4\aws-sdk-net-v4\generator\ServiceClientGeneratorLib\Generators\ProjectFiles\VS2017ProjectFile.tt"
             this.Write(this.ToStringHelper.ToStringWithCulture(this.Project.FrameworkPathOverride));
             
             #line default
             #line hidden
             this.Write("</FrameworkPathOverride>\r\n");
             
-            #line 66 "C:\codebase\v3\AWSDotNetPublic\generator\ServiceClientGeneratorLib\Generators\ProjectFiles\VS2017ProjectFile.tt"
+            #line 66 "C:\codebase\v4\aws-sdk-net-v4\generator\ServiceClientGeneratorLib\Generators\ProjectFiles\VS2017ProjectFile.tt"
 
     }
 
@@ -180,16 +180,16 @@ public virtual string TransformText()
             
             #line default
             #line hidden
-            this.Write("    <NoWarn>");
+            this.Write("    <LangVersion>9.0</LangVersion>\r\n    <NoWarn>");
             
-            #line 72 "C:\codebase\v3\AWSDotNetPublic\generator\ServiceClientGeneratorLib\Generators\ProjectFiles\VS2017ProjectFile.tt"
+            #line 73 "C:\codebase\v4\aws-sdk-net-v4\generator\ServiceClientGeneratorLib\Generators\ProjectFiles\VS2017ProjectFile.tt"
             this.Write(this.ToStringHelper.ToStringWithCulture(this.Project.SupressWarnings));
             
             #line default
             #line hidden
             this.Write("</NoWarn>\r\n");
             
-            #line 73 "C:\codebase\v3\AWSDotNetPublic\generator\ServiceClientGeneratorLib\Generators\ProjectFiles\VS2017ProjectFile.tt"
+            #line 74 "C:\codebase\v4\aws-sdk-net-v4\generator\ServiceClientGeneratorLib\Generators\ProjectFiles\VS2017ProjectFile.tt"
 
     }
 
@@ -202,14 +202,14 @@ public virtual string TransformText()
             this.Write("    <AppendTargetFrameworkToOutputPath>false</AppendTargetFrameworkToOutputPath>\r" +
                     "\n    <OutputPath>");
             
-            #line 80 "C:\codebase\v3\AWSDotNetPublic\generator\ServiceClientGeneratorLib\Generators\ProjectFiles\VS2017ProjectFile.tt"
+            #line 81 "C:\codebase\v4\aws-sdk-net-v4\generator\ServiceClientGeneratorLib\Generators\ProjectFiles\VS2017ProjectFile.tt"
             this.Write(this.ToStringHelper.ToStringWithCulture(this.Project.OutputPathOverride));
             
             #line default
             #line hidden
             this.Write("</OutputPath>\r\n");
             
-            #line 81 "C:\codebase\v3\AWSDotNetPublic\generator\ServiceClientGeneratorLib\Generators\ProjectFiles\VS2017ProjectFile.tt"
+            #line 82 "C:\codebase\v4\aws-sdk-net-v4\generator\ServiceClientGeneratorLib\Generators\ProjectFiles\VS2017ProjectFile.tt"
 
     }
 
@@ -218,7 +218,7 @@ public virtual string TransformText()
             #line hidden
             this.Write("  </PropertyGroup>\r\n");
             
-            #line 85 "C:\codebase\v3\AWSDotNetPublic\generator\ServiceClientGeneratorLib\Generators\ProjectFiles\VS2017ProjectFile.tt"
+            #line 86 "C:\codebase\v4\aws-sdk-net-v4\generator\ServiceClientGeneratorLib\Generators\ProjectFiles\VS2017ProjectFile.tt"
 
     if (this.Project.TargetFrameworks.Contains("netstandard2.0"))
     {
@@ -230,7 +230,7 @@ public virtual string TransformText()
                     "ramework)\' == \'netstandard2.0\'\">\r\n    <LangVersion>8.0</LangVersion>\r\n  </Proper" +
                     "tyGroup>\r\n");
             
-            #line 93 "C:\codebase\v3\AWSDotNetPublic\generator\ServiceClientGeneratorLib\Generators\ProjectFiles\VS2017ProjectFile.tt"
+            #line 94 "C:\codebase\v4\aws-sdk-net-v4\generator\ServiceClientGeneratorLib\Generators\ProjectFiles\VS2017ProjectFile.tt"
 
     }
 
@@ -243,7 +243,7 @@ public virtual string TransformText()
             this.Write("  <PropertyGroup Condition=\"\'$(TargetFramework)\' == \'net8.0\'\">\r\n    <IsTrimmable>" +
                     "true</IsTrimmable>\r\n  </PropertyGroup>\r\n");
             
-            #line 102 "C:\codebase\v3\AWSDotNetPublic\generator\ServiceClientGeneratorLib\Generators\ProjectFiles\VS2017ProjectFile.tt"
+            #line 103 "C:\codebase\v4\aws-sdk-net-v4\generator\ServiceClientGeneratorLib\Generators\ProjectFiles\VS2017ProjectFile.tt"
 
     }
 
@@ -251,7 +251,7 @@ public virtual string TransformText()
             #line default
             #line hidden
             
-            #line 105 "C:\codebase\v3\AWSDotNetPublic\generator\ServiceClientGeneratorLib\Generators\ProjectFiles\VS2017ProjectFile.tt"
+            #line 106 "C:\codebase\v4\aws-sdk-net-v4\generator\ServiceClientGeneratorLib\Generators\ProjectFiles\VS2017ProjectFile.tt"
 
 	if (!this.Project.AssemblyName.Contains("UnitTests"))
 	{
@@ -262,7 +262,7 @@ public virtual string TransformText()
             this.Write("  <PropertyGroup Condition=\" \'$(RuleSetFileForBuild)\' == \'false\' Or \'$(RuleSetFil" +
                     "eForBuild)\' == \'\' \">\r\n\t<CodeAnalysisRuleSet>");
             
-            #line 110 "C:\codebase\v3\AWSDotNetPublic\generator\ServiceClientGeneratorLib\Generators\ProjectFiles\VS2017ProjectFile.tt"
+            #line 111 "C:\codebase\v4\aws-sdk-net-v4\generator\ServiceClientGeneratorLib\Generators\ProjectFiles\VS2017ProjectFile.tt"
             this.Write(this.ToStringHelper.ToStringWithCulture(this.Project.FxcopAnalyzerRuleSetFilePath));
             
             #line default
@@ -270,14 +270,14 @@ public virtual string TransformText()
             this.Write("</CodeAnalysisRuleSet>\r\n  </PropertyGroup>\r\n  <PropertyGroup Condition=\" \'$(RuleS" +
                     "etFileForBuild)\' == \'true\' \">\r\n\t<CodeAnalysisRuleSet>");
             
-            #line 113 "C:\codebase\v3\AWSDotNetPublic\generator\ServiceClientGeneratorLib\Generators\ProjectFiles\VS2017ProjectFile.tt"
+            #line 114 "C:\codebase\v4\aws-sdk-net-v4\generator\ServiceClientGeneratorLib\Generators\ProjectFiles\VS2017ProjectFile.tt"
             this.Write(this.ToStringHelper.ToStringWithCulture(this.Project.FxcopAnalyzerRuleSetFilePathForBuild));
             
             #line default
             #line hidden
             this.Write("</CodeAnalysisRuleSet>\r\n  </PropertyGroup>\r\n\r\n");
             
-            #line 116 "C:\codebase\v3\AWSDotNetPublic\generator\ServiceClientGeneratorLib\Generators\ProjectFiles\VS2017ProjectFile.tt"
+            #line 117 "C:\codebase\v4\aws-sdk-net-v4\generator\ServiceClientGeneratorLib\Generators\ProjectFiles\VS2017ProjectFile.tt"
 
 	}
     if (this.Project.SignBinaries)
@@ -289,7 +289,7 @@ public virtual string TransformText()
             this.Write("  <Choose>\r\n    <When Condition=\" \'$(AWSKeyFile)\' == \'\' \">\r\n      <PropertyGroup>" +
                     "\r\n");
             
-            #line 124 "C:\codebase\v3\AWSDotNetPublic\generator\ServiceClientGeneratorLib\Generators\ProjectFiles\VS2017ProjectFile.tt"
+            #line 125 "C:\codebase\v4\aws-sdk-net-v4\generator\ServiceClientGeneratorLib\Generators\ProjectFiles\VS2017ProjectFile.tt"
 
     if (this.Project.AssemblyName == "AWSSDK.UnitTests.NetFramework")
     {
@@ -300,7 +300,7 @@ public virtual string TransformText()
             this.Write("        <AssemblyOriginatorKeyFile>../../awssdk.dll.snk</AssemblyOriginatorKeyFil" +
                     "e>\r\n");
             
-            #line 129 "C:\codebase\v3\AWSDotNetPublic\generator\ServiceClientGeneratorLib\Generators\ProjectFiles\VS2017ProjectFile.tt"
+            #line 130 "C:\codebase\v4\aws-sdk-net-v4\generator\ServiceClientGeneratorLib\Generators\ProjectFiles\VS2017ProjectFile.tt"
 
     }
 
@@ -308,7 +308,7 @@ public virtual string TransformText()
             #line default
             #line hidden
             
-            #line 132 "C:\codebase\v3\AWSDotNetPublic\generator\ServiceClientGeneratorLib\Generators\ProjectFiles\VS2017ProjectFile.tt"
+            #line 133 "C:\codebase\v4\aws-sdk-net-v4\generator\ServiceClientGeneratorLib\Generators\ProjectFiles\VS2017ProjectFile.tt"
 
     else
     {
@@ -319,7 +319,7 @@ public virtual string TransformText()
             this.Write("        <AssemblyOriginatorKeyFile>../../../awssdk.dll.snk</AssemblyOriginatorKey" +
                     "File>\r\n");
             
-            #line 137 "C:\codebase\v3\AWSDotNetPublic\generator\ServiceClientGeneratorLib\Generators\ProjectFiles\VS2017ProjectFile.tt"
+            #line 138 "C:\codebase\v4\aws-sdk-net-v4\generator\ServiceClientGeneratorLib\Generators\ProjectFiles\VS2017ProjectFile.tt"
 
     }
 
@@ -330,7 +330,7 @@ public virtual string TransformText()
                     "    <AssemblyOriginatorKeyFile>$(AWSKeyFile)</AssemblyOriginatorKeyFile>\r\n      " +
                     "</PropertyGroup>\r\n    </Otherwise>\r\n  </Choose>\r\n\r\n");
             
-            #line 149 "C:\codebase\v3\AWSDotNetPublic\generator\ServiceClientGeneratorLib\Generators\ProjectFiles\VS2017ProjectFile.tt"
+            #line 150 "C:\codebase\v4\aws-sdk-net-v4\generator\ServiceClientGeneratorLib\Generators\ProjectFiles\VS2017ProjectFile.tt"
 
     }
     if(this.Project.CustomRoslynAnalyzersDllDirectory != null)
@@ -341,14 +341,14 @@ public virtual string TransformText()
             #line hidden
             this.Write("  <ItemGroup Condition=\"$(RunAnalyzersDuringBuild)\">\r\n    <Analyzer Include= \"");
             
-            #line 155 "C:\codebase\v3\AWSDotNetPublic\generator\ServiceClientGeneratorLib\Generators\ProjectFiles\VS2017ProjectFile.tt"
+            #line 156 "C:\codebase\v4\aws-sdk-net-v4\generator\ServiceClientGeneratorLib\Generators\ProjectFiles\VS2017ProjectFile.tt"
             this.Write(this.ToStringHelper.ToStringWithCulture(this.Project.CustomRoslynAnalyzersDllDirectory));
             
             #line default
             #line hidden
             this.Write("\" />\r\n  </ItemGroup>\r\n");
             
-            #line 157 "C:\codebase\v3\AWSDotNetPublic\generator\ServiceClientGeneratorLib\Generators\ProjectFiles\VS2017ProjectFile.tt"
+            #line 158 "C:\codebase\v4\aws-sdk-net-v4\generator\ServiceClientGeneratorLib\Generators\ProjectFiles\VS2017ProjectFile.tt"
 
     }
     if(this.Project.IndividualFileIncludes != null)
@@ -359,7 +359,7 @@ public virtual string TransformText()
             #line hidden
             this.Write("  <ItemGroup>\r\n");
             
-            #line 163 "C:\codebase\v3\AWSDotNetPublic\generator\ServiceClientGeneratorLib\Generators\ProjectFiles\VS2017ProjectFile.tt"
+            #line 164 "C:\codebase\v4\aws-sdk-net-v4\generator\ServiceClientGeneratorLib\Generators\ProjectFiles\VS2017ProjectFile.tt"
 
     foreach (var compileIncludeEntry in this.Project.IndividualFileIncludes)
     {
@@ -369,14 +369,14 @@ public virtual string TransformText()
             #line hidden
             this.Write("    <Compile Include=\"");
             
-            #line 167 "C:\codebase\v3\AWSDotNetPublic\generator\ServiceClientGeneratorLib\Generators\ProjectFiles\VS2017ProjectFile.tt"
+            #line 168 "C:\codebase\v4\aws-sdk-net-v4\generator\ServiceClientGeneratorLib\Generators\ProjectFiles\VS2017ProjectFile.tt"
             this.Write(this.ToStringHelper.ToStringWithCulture(compileIncludeEntry));
             
             #line default
             #line hidden
             this.Write("\"/>\r\n");
             
-            #line 168 "C:\codebase\v3\AWSDotNetPublic\generator\ServiceClientGeneratorLib\Generators\ProjectFiles\VS2017ProjectFile.tt"
+            #line 169 "C:\codebase\v4\aws-sdk-net-v4\generator\ServiceClientGeneratorLib\Generators\ProjectFiles\VS2017ProjectFile.tt"
 
     }
 
@@ -385,7 +385,7 @@ public virtual string TransformText()
             #line hidden
             this.Write("  </ItemGroup>\r\n");
             
-            #line 172 "C:\codebase\v3\AWSDotNetPublic\generator\ServiceClientGeneratorLib\Generators\ProjectFiles\VS2017ProjectFile.tt"
+            #line 173 "C:\codebase\v4\aws-sdk-net-v4\generator\ServiceClientGeneratorLib\Generators\ProjectFiles\VS2017ProjectFile.tt"
 
     }
 
@@ -397,7 +397,7 @@ public virtual string TransformText()
             #line hidden
             this.Write("  <ItemGroup>\r\n");
             
-            #line 179 "C:\codebase\v3\AWSDotNetPublic\generator\ServiceClientGeneratorLib\Generators\ProjectFiles\VS2017ProjectFile.tt"
+            #line 180 "C:\codebase\v4\aws-sdk-net-v4\generator\ServiceClientGeneratorLib\Generators\ProjectFiles\VS2017ProjectFile.tt"
 
     foreach (var compileRemoveEntry in this.Project.CompileRemoveList)
     {
@@ -409,21 +409,21 @@ public virtual string TransformText()
             #line hidden
             this.Write("    <Compile Remove=\"**/");
             
-            #line 185 "C:\codebase\v3\AWSDotNetPublic\generator\ServiceClientGeneratorLib\Generators\ProjectFiles\VS2017ProjectFile.tt"
+            #line 186 "C:\codebase\v4\aws-sdk-net-v4\generator\ServiceClientGeneratorLib\Generators\ProjectFiles\VS2017ProjectFile.tt"
             this.Write(this.ToStringHelper.ToStringWithCulture(compileRemoveEntry));
             
             #line default
             #line hidden
             this.Write("/**\"/>\r\n\t<None Remove=\"**/");
             
-            #line 186 "C:\codebase\v3\AWSDotNetPublic\generator\ServiceClientGeneratorLib\Generators\ProjectFiles\VS2017ProjectFile.tt"
+            #line 187 "C:\codebase\v4\aws-sdk-net-v4\generator\ServiceClientGeneratorLib\Generators\ProjectFiles\VS2017ProjectFile.tt"
             this.Write(this.ToStringHelper.ToStringWithCulture(compileRemoveEntry));
             
             #line default
             #line hidden
             this.Write("/**\" />\r\n");
             
-            #line 187 "C:\codebase\v3\AWSDotNetPublic\generator\ServiceClientGeneratorLib\Generators\ProjectFiles\VS2017ProjectFile.tt"
+            #line 188 "C:\codebase\v4\aws-sdk-net-v4\generator\ServiceClientGeneratorLib\Generators\ProjectFiles\VS2017ProjectFile.tt"
 
     continue;
         }
@@ -433,14 +433,14 @@ public virtual string TransformText()
             #line hidden
             this.Write("    <Compile Remove=\"**/");
             
-            #line 191 "C:\codebase\v3\AWSDotNetPublic\generator\ServiceClientGeneratorLib\Generators\ProjectFiles\VS2017ProjectFile.tt"
+            #line 192 "C:\codebase\v4\aws-sdk-net-v4\generator\ServiceClientGeneratorLib\Generators\ProjectFiles\VS2017ProjectFile.tt"
             this.Write(this.ToStringHelper.ToStringWithCulture(compileRemoveEntry));
             
             #line default
             #line hidden
             this.Write("/**\"/>\r\n");
             
-            #line 192 "C:\codebase\v3\AWSDotNetPublic\generator\ServiceClientGeneratorLib\Generators\ProjectFiles\VS2017ProjectFile.tt"
+            #line 193 "C:\codebase\v4\aws-sdk-net-v4\generator\ServiceClientGeneratorLib\Generators\ProjectFiles\VS2017ProjectFile.tt"
 
     }
 
@@ -449,7 +449,7 @@ public virtual string TransformText()
             #line hidden
             this.Write("  </ItemGroup>\r\n\r\n");
             
-            #line 197 "C:\codebase\v3\AWSDotNetPublic\generator\ServiceClientGeneratorLib\Generators\ProjectFiles\VS2017ProjectFile.tt"
+            #line 198 "C:\codebase\v4\aws-sdk-net-v4\generator\ServiceClientGeneratorLib\Generators\ProjectFiles\VS2017ProjectFile.tt"
 
     }
 
@@ -457,7 +457,7 @@ public virtual string TransformText()
             #line default
             #line hidden
             
-            #line 200 "C:\codebase\v3\AWSDotNetPublic\generator\ServiceClientGeneratorLib\Generators\ProjectFiles\VS2017ProjectFile.tt"
+            #line 201 "C:\codebase\v4\aws-sdk-net-v4\generator\ServiceClientGeneratorLib\Generators\ProjectFiles\VS2017ProjectFile.tt"
 
     if (this.Project.ProjectReferences != null)
     {
@@ -467,7 +467,7 @@ public virtual string TransformText()
             #line hidden
             this.Write("  <ItemGroup>\r\n");
             
-            #line 205 "C:\codebase\v3\AWSDotNetPublic\generator\ServiceClientGeneratorLib\Generators\ProjectFiles\VS2017ProjectFile.tt"
+            #line 206 "C:\codebase\v4\aws-sdk-net-v4\generator\ServiceClientGeneratorLib\Generators\ProjectFiles\VS2017ProjectFile.tt"
 
     foreach (var projectReference in this.Project.ProjectReferences)
     {
@@ -477,14 +477,14 @@ public virtual string TransformText()
             #line hidden
             this.Write("    <ProjectReference Include=\"");
             
-            #line 209 "C:\codebase\v3\AWSDotNetPublic\generator\ServiceClientGeneratorLib\Generators\ProjectFiles\VS2017ProjectFile.tt"
+            #line 210 "C:\codebase\v4\aws-sdk-net-v4\generator\ServiceClientGeneratorLib\Generators\ProjectFiles\VS2017ProjectFile.tt"
             this.Write(this.ToStringHelper.ToStringWithCulture(projectReference.IncludePath));
             
             #line default
             #line hidden
             this.Write("\"/>\r\n");
             
-            #line 210 "C:\codebase\v3\AWSDotNetPublic\generator\ServiceClientGeneratorLib\Generators\ProjectFiles\VS2017ProjectFile.tt"
+            #line 211 "C:\codebase\v4\aws-sdk-net-v4\generator\ServiceClientGeneratorLib\Generators\ProjectFiles\VS2017ProjectFile.tt"
 
     }
 
@@ -493,7 +493,7 @@ public virtual string TransformText()
             #line hidden
             this.Write("  </ItemGroup>\r\n\r\n");
             
-            #line 215 "C:\codebase\v3\AWSDotNetPublic\generator\ServiceClientGeneratorLib\Generators\ProjectFiles\VS2017ProjectFile.tt"
+            #line 216 "C:\codebase\v4\aws-sdk-net-v4\generator\ServiceClientGeneratorLib\Generators\ProjectFiles\VS2017ProjectFile.tt"
 
     }
 
@@ -501,7 +501,7 @@ public virtual string TransformText()
             #line default
             #line hidden
             
-            #line 218 "C:\codebase\v3\AWSDotNetPublic\generator\ServiceClientGeneratorLib\Generators\ProjectFiles\VS2017ProjectFile.tt"
+            #line 219 "C:\codebase\v4\aws-sdk-net-v4\generator\ServiceClientGeneratorLib\Generators\ProjectFiles\VS2017ProjectFile.tt"
 
     if (this.Project.PackageReferences != null)
     {
@@ -511,7 +511,7 @@ public virtual string TransformText()
             #line hidden
             this.Write("  <ItemGroup Condition=\"$(RunAnalyzersDuringBuild)\">\r\n");
             
-            #line 223 "C:\codebase\v3\AWSDotNetPublic\generator\ServiceClientGeneratorLib\Generators\ProjectFiles\VS2017ProjectFile.tt"
+            #line 224 "C:\codebase\v4\aws-sdk-net-v4\generator\ServiceClientGeneratorLib\Generators\ProjectFiles\VS2017ProjectFile.tt"
 
         foreach(var package in this.Project.PackageReferences.Where(p => p.IsAnalyzer))
         {
@@ -523,28 +523,28 @@ public virtual string TransformText()
             #line hidden
             this.Write("        <PackageReference Include=\"");
             
-            #line 229 "C:\codebase\v3\AWSDotNetPublic\generator\ServiceClientGeneratorLib\Generators\ProjectFiles\VS2017ProjectFile.tt"
+            #line 230 "C:\codebase\v4\aws-sdk-net-v4\generator\ServiceClientGeneratorLib\Generators\ProjectFiles\VS2017ProjectFile.tt"
             this.Write(this.ToStringHelper.ToStringWithCulture(package.Include));
             
             #line default
             #line hidden
             this.Write("\" Version=\"");
             
-            #line 229 "C:\codebase\v3\AWSDotNetPublic\generator\ServiceClientGeneratorLib\Generators\ProjectFiles\VS2017ProjectFile.tt"
+            #line 230 "C:\codebase\v4\aws-sdk-net-v4\generator\ServiceClientGeneratorLib\Generators\ProjectFiles\VS2017ProjectFile.tt"
             this.Write(this.ToStringHelper.ToStringWithCulture(package.Version));
             
             #line default
             #line hidden
             this.Write("\">\r\n            <PrivateAssets>");
             
-            #line 230 "C:\codebase\v3\AWSDotNetPublic\generator\ServiceClientGeneratorLib\Generators\ProjectFiles\VS2017ProjectFile.tt"
+            #line 231 "C:\codebase\v4\aws-sdk-net-v4\generator\ServiceClientGeneratorLib\Generators\ProjectFiles\VS2017ProjectFile.tt"
             this.Write(this.ToStringHelper.ToStringWithCulture(package.PrivateAssets));
             
             #line default
             #line hidden
             this.Write("</PrivateAssets>\r\n        </PackageReference>\r\n");
             
-            #line 232 "C:\codebase\v3\AWSDotNetPublic\generator\ServiceClientGeneratorLib\Generators\ProjectFiles\VS2017ProjectFile.tt"
+            #line 233 "C:\codebase\v4\aws-sdk-net-v4\generator\ServiceClientGeneratorLib\Generators\ProjectFiles\VS2017ProjectFile.tt"
 
             }
             else
@@ -555,21 +555,21 @@ public virtual string TransformText()
             #line hidden
             this.Write("\t    <PackageReference Include=\"");
             
-            #line 237 "C:\codebase\v3\AWSDotNetPublic\generator\ServiceClientGeneratorLib\Generators\ProjectFiles\VS2017ProjectFile.tt"
+            #line 238 "C:\codebase\v4\aws-sdk-net-v4\generator\ServiceClientGeneratorLib\Generators\ProjectFiles\VS2017ProjectFile.tt"
             this.Write(this.ToStringHelper.ToStringWithCulture(package.Include));
             
             #line default
             #line hidden
             this.Write("\" Version=\"");
             
-            #line 237 "C:\codebase\v3\AWSDotNetPublic\generator\ServiceClientGeneratorLib\Generators\ProjectFiles\VS2017ProjectFile.tt"
+            #line 238 "C:\codebase\v4\aws-sdk-net-v4\generator\ServiceClientGeneratorLib\Generators\ProjectFiles\VS2017ProjectFile.tt"
             this.Write(this.ToStringHelper.ToStringWithCulture(package.Version));
             
             #line default
             #line hidden
             this.Write("\"/>\r\n");
             
-            #line 238 "C:\codebase\v3\AWSDotNetPublic\generator\ServiceClientGeneratorLib\Generators\ProjectFiles\VS2017ProjectFile.tt"
+            #line 239 "C:\codebase\v4\aws-sdk-net-v4\generator\ServiceClientGeneratorLib\Generators\ProjectFiles\VS2017ProjectFile.tt"
 
 		    }
         }
@@ -579,7 +579,7 @@ public virtual string TransformText()
             #line hidden
             this.Write("  </ItemGroup>\r\n  <ItemGroup>\r\n");
             
-            #line 244 "C:\codebase\v3\AWSDotNetPublic\generator\ServiceClientGeneratorLib\Generators\ProjectFiles\VS2017ProjectFile.tt"
+            #line 245 "C:\codebase\v4\aws-sdk-net-v4\generator\ServiceClientGeneratorLib\Generators\ProjectFiles\VS2017ProjectFile.tt"
 
         foreach(var package in this.Project.PackageReferences.Where(p => !p.IsAnalyzer))
         {
@@ -591,28 +591,28 @@ public virtual string TransformText()
             #line hidden
             this.Write("        <PackageReference Include=\"");
             
-            #line 250 "C:\codebase\v3\AWSDotNetPublic\generator\ServiceClientGeneratorLib\Generators\ProjectFiles\VS2017ProjectFile.tt"
+            #line 251 "C:\codebase\v4\aws-sdk-net-v4\generator\ServiceClientGeneratorLib\Generators\ProjectFiles\VS2017ProjectFile.tt"
             this.Write(this.ToStringHelper.ToStringWithCulture(package.Include));
             
             #line default
             #line hidden
             this.Write("\" Version=\"");
             
-            #line 250 "C:\codebase\v3\AWSDotNetPublic\generator\ServiceClientGeneratorLib\Generators\ProjectFiles\VS2017ProjectFile.tt"
+            #line 251 "C:\codebase\v4\aws-sdk-net-v4\generator\ServiceClientGeneratorLib\Generators\ProjectFiles\VS2017ProjectFile.tt"
             this.Write(this.ToStringHelper.ToStringWithCulture(package.Version));
             
             #line default
             #line hidden
             this.Write("\">\r\n            <PrivateAssets>");
             
-            #line 251 "C:\codebase\v3\AWSDotNetPublic\generator\ServiceClientGeneratorLib\Generators\ProjectFiles\VS2017ProjectFile.tt"
+            #line 252 "C:\codebase\v4\aws-sdk-net-v4\generator\ServiceClientGeneratorLib\Generators\ProjectFiles\VS2017ProjectFile.tt"
             this.Write(this.ToStringHelper.ToStringWithCulture(package.PrivateAssets));
             
             #line default
             #line hidden
             this.Write("</PrivateAssets>\r\n        </PackageReference>\r\n");
             
-            #line 253 "C:\codebase\v3\AWSDotNetPublic\generator\ServiceClientGeneratorLib\Generators\ProjectFiles\VS2017ProjectFile.tt"
+            #line 254 "C:\codebase\v4\aws-sdk-net-v4\generator\ServiceClientGeneratorLib\Generators\ProjectFiles\VS2017ProjectFile.tt"
 
             }
             else
@@ -623,21 +623,21 @@ public virtual string TransformText()
             #line hidden
             this.Write("\t    <PackageReference Include=\"");
             
-            #line 258 "C:\codebase\v3\AWSDotNetPublic\generator\ServiceClientGeneratorLib\Generators\ProjectFiles\VS2017ProjectFile.tt"
+            #line 259 "C:\codebase\v4\aws-sdk-net-v4\generator\ServiceClientGeneratorLib\Generators\ProjectFiles\VS2017ProjectFile.tt"
             this.Write(this.ToStringHelper.ToStringWithCulture(package.Include));
             
             #line default
             #line hidden
             this.Write("\" Version=\"");
             
-            #line 258 "C:\codebase\v3\AWSDotNetPublic\generator\ServiceClientGeneratorLib\Generators\ProjectFiles\VS2017ProjectFile.tt"
+            #line 259 "C:\codebase\v4\aws-sdk-net-v4\generator\ServiceClientGeneratorLib\Generators\ProjectFiles\VS2017ProjectFile.tt"
             this.Write(this.ToStringHelper.ToStringWithCulture(package.Version));
             
             #line default
             #line hidden
             this.Write("\"/>\r\n");
             
-            #line 259 "C:\codebase\v3\AWSDotNetPublic\generator\ServiceClientGeneratorLib\Generators\ProjectFiles\VS2017ProjectFile.tt"
+            #line 260 "C:\codebase\v4\aws-sdk-net-v4\generator\ServiceClientGeneratorLib\Generators\ProjectFiles\VS2017ProjectFile.tt"
 
 		    }
         }
@@ -647,7 +647,7 @@ public virtual string TransformText()
             #line hidden
             this.Write("  </ItemGroup>\r\n\r\n");
             
-            #line 265 "C:\codebase\v3\AWSDotNetPublic\generator\ServiceClientGeneratorLib\Generators\ProjectFiles\VS2017ProjectFile.tt"
+            #line 266 "C:\codebase\v4\aws-sdk-net-v4\generator\ServiceClientGeneratorLib\Generators\ProjectFiles\VS2017ProjectFile.tt"
 
     }
     if (this.Project.ReferenceDependencies != null)
@@ -658,7 +658,7 @@ public virtual string TransformText()
             #line hidden
             this.Write("  <ItemGroup>\r\n");
             
-            #line 271 "C:\codebase\v3\AWSDotNetPublic\generator\ServiceClientGeneratorLib\Generators\ProjectFiles\VS2017ProjectFile.tt"
+            #line 272 "C:\codebase\v4\aws-sdk-net-v4\generator\ServiceClientGeneratorLib\Generators\ProjectFiles\VS2017ProjectFile.tt"
 
         foreach (var reference in this.Project.ReferenceDependencies)
         {
@@ -670,14 +670,14 @@ public virtual string TransformText()
             #line hidden
             this.Write("    <Reference Include=\"");
             
-            #line 277 "C:\codebase\v3\AWSDotNetPublic\generator\ServiceClientGeneratorLib\Generators\ProjectFiles\VS2017ProjectFile.tt"
+            #line 278 "C:\codebase\v4\aws-sdk-net-v4\generator\ServiceClientGeneratorLib\Generators\ProjectFiles\VS2017ProjectFile.tt"
             this.Write(this.ToStringHelper.ToStringWithCulture(reference.Name));
             
             #line default
             #line hidden
             this.Write("\"/>\r\n");
             
-            #line 278 "C:\codebase\v3\AWSDotNetPublic\generator\ServiceClientGeneratorLib\Generators\ProjectFiles\VS2017ProjectFile.tt"
+            #line 279 "C:\codebase\v4\aws-sdk-net-v4\generator\ServiceClientGeneratorLib\Generators\ProjectFiles\VS2017ProjectFile.tt"
 
             }
             else
@@ -688,21 +688,21 @@ public virtual string TransformText()
             #line hidden
             this.Write("    <Reference Include=\"");
             
-            #line 283 "C:\codebase\v3\AWSDotNetPublic\generator\ServiceClientGeneratorLib\Generators\ProjectFiles\VS2017ProjectFile.tt"
+            #line 284 "C:\codebase\v4\aws-sdk-net-v4\generator\ServiceClientGeneratorLib\Generators\ProjectFiles\VS2017ProjectFile.tt"
             this.Write(this.ToStringHelper.ToStringWithCulture(reference.Name));
             
             #line default
             #line hidden
             this.Write("\">\r\n        <HintPath>");
             
-            #line 284 "C:\codebase\v3\AWSDotNetPublic\generator\ServiceClientGeneratorLib\Generators\ProjectFiles\VS2017ProjectFile.tt"
+            #line 285 "C:\codebase\v4\aws-sdk-net-v4\generator\ServiceClientGeneratorLib\Generators\ProjectFiles\VS2017ProjectFile.tt"
             this.Write(this.ToStringHelper.ToStringWithCulture(reference.HintPath));
             
             #line default
             #line hidden
             this.Write("</HintPath>\r\n    </Reference>\r\n");
             
-            #line 286 "C:\codebase\v3\AWSDotNetPublic\generator\ServiceClientGeneratorLib\Generators\ProjectFiles\VS2017ProjectFile.tt"
+            #line 287 "C:\codebase\v4\aws-sdk-net-v4\generator\ServiceClientGeneratorLib\Generators\ProjectFiles\VS2017ProjectFile.tt"
 
             }
         }
@@ -712,7 +712,7 @@ public virtual string TransformText()
             #line hidden
             this.Write("  </ItemGroup>\r\n\r\n");
             
-            #line 292 "C:\codebase\v3\AWSDotNetPublic\generator\ServiceClientGeneratorLib\Generators\ProjectFiles\VS2017ProjectFile.tt"
+            #line 293 "C:\codebase\v4\aws-sdk-net-v4\generator\ServiceClientGeneratorLib\Generators\ProjectFiles\VS2017ProjectFile.tt"
 
     }
     if (this.Project.EmbeddedResources != null)
@@ -723,7 +723,7 @@ public virtual string TransformText()
             #line hidden
             this.Write("  <ItemGroup>\r\n");
             
-            #line 298 "C:\codebase\v3\AWSDotNetPublic\generator\ServiceClientGeneratorLib\Generators\ProjectFiles\VS2017ProjectFile.tt"
+            #line 299 "C:\codebase\v4\aws-sdk-net-v4\generator\ServiceClientGeneratorLib\Generators\ProjectFiles\VS2017ProjectFile.tt"
 
     foreach (var resource in this.Project.EmbeddedResources)
     {
@@ -733,14 +733,14 @@ public virtual string TransformText()
             #line hidden
             this.Write("    <EmbeddedResource Include=\"");
             
-            #line 302 "C:\codebase\v3\AWSDotNetPublic\generator\ServiceClientGeneratorLib\Generators\ProjectFiles\VS2017ProjectFile.tt"
+            #line 303 "C:\codebase\v4\aws-sdk-net-v4\generator\ServiceClientGeneratorLib\Generators\ProjectFiles\VS2017ProjectFile.tt"
             this.Write(this.ToStringHelper.ToStringWithCulture(resource));
             
             #line default
             #line hidden
             this.Write("\"/>\r\n");
             
-            #line 303 "C:\codebase\v3\AWSDotNetPublic\generator\ServiceClientGeneratorLib\Generators\ProjectFiles\VS2017ProjectFile.tt"
+            #line 304 "C:\codebase\v4\aws-sdk-net-v4\generator\ServiceClientGeneratorLib\Generators\ProjectFiles\VS2017ProjectFile.tt"
 
     }
 
@@ -749,7 +749,7 @@ public virtual string TransformText()
             #line hidden
             this.Write("  </ItemGroup>\r\n");
             
-            #line 307 "C:\codebase\v3\AWSDotNetPublic\generator\ServiceClientGeneratorLib\Generators\ProjectFiles\VS2017ProjectFile.tt"
+            #line 308 "C:\codebase\v4\aws-sdk-net-v4\generator\ServiceClientGeneratorLib\Generators\ProjectFiles\VS2017ProjectFile.tt"
 
     }
 
@@ -761,7 +761,7 @@ public virtual string TransformText()
             #line hidden
             this.Write("  <ItemGroup>\r\n");
             
-            #line 314 "C:\codebase\v3\AWSDotNetPublic\generator\ServiceClientGeneratorLib\Generators\ProjectFiles\VS2017ProjectFile.tt"
+            #line 315 "C:\codebase\v4\aws-sdk-net-v4\generator\ServiceClientGeneratorLib\Generators\ProjectFiles\VS2017ProjectFile.tt"
 
         foreach (var service in this.Project.Services)
         {
@@ -771,14 +771,14 @@ public virtual string TransformText()
             #line hidden
             this.Write("    <Service Include=\"");
             
-            #line 318 "C:\codebase\v3\AWSDotNetPublic\generator\ServiceClientGeneratorLib\Generators\ProjectFiles\VS2017ProjectFile.tt"
+            #line 319 "C:\codebase\v4\aws-sdk-net-v4\generator\ServiceClientGeneratorLib\Generators\ProjectFiles\VS2017ProjectFile.tt"
             this.Write(this.ToStringHelper.ToStringWithCulture(service));
             
             #line default
             #line hidden
             this.Write("\"/>\r\n");
             
-            #line 319 "C:\codebase\v3\AWSDotNetPublic\generator\ServiceClientGeneratorLib\Generators\ProjectFiles\VS2017ProjectFile.tt"
+            #line 320 "C:\codebase\v4\aws-sdk-net-v4\generator\ServiceClientGeneratorLib\Generators\ProjectFiles\VS2017ProjectFile.tt"
 
         }
 
@@ -787,7 +787,7 @@ public virtual string TransformText()
             #line hidden
             this.Write("  </ItemGroup>\r\n");
             
-            #line 323 "C:\codebase\v3\AWSDotNetPublic\generator\ServiceClientGeneratorLib\Generators\ProjectFiles\VS2017ProjectFile.tt"
+            #line 324 "C:\codebase\v4\aws-sdk-net-v4\generator\ServiceClientGeneratorLib\Generators\ProjectFiles\VS2017ProjectFile.tt"
 
     }
 
@@ -798,7 +798,7 @@ public virtual string TransformText()
             return this.GenerationEnvironment.ToString();
         }
         
-        #line 329 "C:\codebase\v3\AWSDotNetPublic\generator\ServiceClientGeneratorLib\Generators\ProjectFiles\VS2017ProjectFile.tt"
+        #line 330 "C:\codebase\v4\aws-sdk-net-v4\generator\ServiceClientGeneratorLib\Generators\ProjectFiles\VS2017ProjectFile.tt"
 
     public Project Project { get; set; }
     public ServiceConfiguration ServiceConfiguration { get; set; }
diff --git a/generator/ServiceClientGeneratorLib/Generators/ProjectFiles/VS2017ProjectFile.tt b/generator/ServiceClientGeneratorLib/Generators/ProjectFiles/VS2017ProjectFile.tt
index 4848f4dc4c9f..48b17f9dbf0b 100644
--- a/generator/ServiceClientGeneratorLib/Generators/ProjectFiles/VS2017ProjectFile.tt
+++ b/generator/ServiceClientGeneratorLib/Generators/ProjectFiles/VS2017ProjectFile.tt
@@ -69,6 +69,7 @@
     if (!string.IsNullOrEmpty(this.Project.SupressWarnings))
     {
 #>
+    <LangVersion>9.0</LangVersion>
     <NoWarn><#=this.Project.SupressWarnings #></NoWarn>
 <#
     }
diff --git a/generator/ServiceModels/_manifest.json b/generator/ServiceModels/_manifest.json
index f6ca6505d6cf..2c74d47b9bec 100644
--- a/generator/ServiceModels/_manifest.json
+++ b/generator/ServiceModels/_manifest.json
@@ -2,11 +2,11 @@
     "projects": [
         {
             "name": "NetFramework",
-            "targetFrameworks": [ "net462" ],
+            "targetFrameworks": [ "net472" ],
             "defineConstants": [ "BCL", "AWS_ASYNC_API", "CODE_ANALYSIS" ],
             "template": "VS2017ProjectFile",
             "excludeFolders": [ "_netstandard", "obj"],
-            "nugetTargetPlatform": "net462",
+            "nugetTargetPlatform": "net472",
             "frameworkReferences" : [
                 {"name": "System.Configuration"}
             ],
@@ -52,7 +52,7 @@
     "unittestprojects":[
         {
             "name": "NetFramework",
-            "targetFrameworks": [ "net462" ],
+            "targetFrameworks": [ "net472" ],
             "defineConstants": [ "TRACE", "BCL", "ASYNC_AWAIT" ],
             "excludeFolders": ["obj"],
             "visualStudioServices" : ["{82a7f48d-3b50-4b1e-b82e-3ada8210c358}"],
diff --git a/sdk/code-analysis/ServiceAnalysis/ACMPCA/Properties/AssemblyInfo.cs b/sdk/code-analysis/ServiceAnalysis/ACMPCA/Properties/AssemblyInfo.cs
index 724c31a8130a..b98d262b16c8 100644
--- a/sdk/code-analysis/ServiceAnalysis/ACMPCA/Properties/AssemblyInfo.cs
+++ b/sdk/code-analysis/ServiceAnalysis/ACMPCA/Properties/AssemblyInfo.cs
@@ -28,5 +28,5 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.301.43")]
\ No newline at end of file
+[assembly: AssemblyVersion("4.0")]
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/code-analysis/ServiceAnalysis/APIGateway/Properties/AssemblyInfo.cs b/sdk/code-analysis/ServiceAnalysis/APIGateway/Properties/AssemblyInfo.cs
index 1a535d98515f..973c39243e1a 100644
--- a/sdk/code-analysis/ServiceAnalysis/APIGateway/Properties/AssemblyInfo.cs
+++ b/sdk/code-analysis/ServiceAnalysis/APIGateway/Properties/AssemblyInfo.cs
@@ -28,5 +28,5 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.300.86")]
\ No newline at end of file
+[assembly: AssemblyVersion("4.0")]
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/code-analysis/ServiceAnalysis/ARCZonalShift/Properties/AssemblyInfo.cs b/sdk/code-analysis/ServiceAnalysis/ARCZonalShift/Properties/AssemblyInfo.cs
index 2b585e9d7101..f90ccdaaf0df 100644
--- a/sdk/code-analysis/ServiceAnalysis/ARCZonalShift/Properties/AssemblyInfo.cs
+++ b/sdk/code-analysis/ServiceAnalysis/ARCZonalShift/Properties/AssemblyInfo.cs
@@ -28,5 +28,5 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.301.72")]
\ No newline at end of file
+[assembly: AssemblyVersion("4.0")]
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/code-analysis/ServiceAnalysis/AWSHealth/Properties/AssemblyInfo.cs b/sdk/code-analysis/ServiceAnalysis/AWSHealth/Properties/AssemblyInfo.cs
index 0525e62a2fa9..3b22f00d1fb7 100644
--- a/sdk/code-analysis/ServiceAnalysis/AWSHealth/Properties/AssemblyInfo.cs
+++ b/sdk/code-analysis/ServiceAnalysis/AWSHealth/Properties/AssemblyInfo.cs
@@ -28,5 +28,5 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.300.84")]
\ No newline at end of file
+[assembly: AssemblyVersion("4.0")]
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/code-analysis/ServiceAnalysis/AWSMarketplaceCommerceAnalytics/Properties/AssemblyInfo.cs b/sdk/code-analysis/ServiceAnalysis/AWSMarketplaceCommerceAnalytics/Properties/AssemblyInfo.cs
index 98a521e1a4a8..945303cc3c7e 100644
--- a/sdk/code-analysis/ServiceAnalysis/AWSMarketplaceCommerceAnalytics/Properties/AssemblyInfo.cs
+++ b/sdk/code-analysis/ServiceAnalysis/AWSMarketplaceCommerceAnalytics/Properties/AssemblyInfo.cs
@@ -28,5 +28,5 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.300.84")]
\ No newline at end of file
+[assembly: AssemblyVersion("4.0")]
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/code-analysis/ServiceAnalysis/AWSMarketplaceMetering/Properties/AssemblyInfo.cs b/sdk/code-analysis/ServiceAnalysis/AWSMarketplaceMetering/Properties/AssemblyInfo.cs
index 23bd2d7d229e..92231c624c0b 100644
--- a/sdk/code-analysis/ServiceAnalysis/AWSMarketplaceMetering/Properties/AssemblyInfo.cs
+++ b/sdk/code-analysis/ServiceAnalysis/AWSMarketplaceMetering/Properties/AssemblyInfo.cs
@@ -28,5 +28,5 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.300.84")]
\ No newline at end of file
+[assembly: AssemblyVersion("4.0")]
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/code-analysis/ServiceAnalysis/AWSSupport/Properties/AssemblyInfo.cs b/sdk/code-analysis/ServiceAnalysis/AWSSupport/Properties/AssemblyInfo.cs
index a3286fad70be..60fd38a620c7 100644
--- a/sdk/code-analysis/ServiceAnalysis/AWSSupport/Properties/AssemblyInfo.cs
+++ b/sdk/code-analysis/ServiceAnalysis/AWSSupport/Properties/AssemblyInfo.cs
@@ -28,5 +28,5 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.301.1")]
\ No newline at end of file
+[assembly: AssemblyVersion("4.0")]
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/code-analysis/ServiceAnalysis/AccessAnalyzer/Properties/AssemblyInfo.cs b/sdk/code-analysis/ServiceAnalysis/AccessAnalyzer/Properties/AssemblyInfo.cs
index 9c848d5d6a87..d87d5fbff43d 100644
--- a/sdk/code-analysis/ServiceAnalysis/AccessAnalyzer/Properties/AssemblyInfo.cs
+++ b/sdk/code-analysis/ServiceAnalysis/AccessAnalyzer/Properties/AssemblyInfo.cs
@@ -28,5 +28,5 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.303.25")]
\ No newline at end of file
+[assembly: AssemblyVersion("4.0")]
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/code-analysis/ServiceAnalysis/Account/Properties/AssemblyInfo.cs b/sdk/code-analysis/ServiceAnalysis/Account/Properties/AssemblyInfo.cs
index 88cf42bd0ad1..90af93d910ef 100644
--- a/sdk/code-analysis/ServiceAnalysis/Account/Properties/AssemblyInfo.cs
+++ b/sdk/code-analysis/ServiceAnalysis/Account/Properties/AssemblyInfo.cs
@@ -28,5 +28,5 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.300.84")]
\ No newline at end of file
+[assembly: AssemblyVersion("4.0")]
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/code-analysis/ServiceAnalysis/AlexaForBusiness/Properties/AssemblyInfo.cs b/sdk/code-analysis/ServiceAnalysis/AlexaForBusiness/Properties/AssemblyInfo.cs
index 3b046fa7d02f..f80fb418b934 100644
--- a/sdk/code-analysis/ServiceAnalysis/AlexaForBusiness/Properties/AssemblyInfo.cs
+++ b/sdk/code-analysis/ServiceAnalysis/AlexaForBusiness/Properties/AssemblyInfo.cs
@@ -28,5 +28,5 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.300.84")]
\ No newline at end of file
+[assembly: AssemblyVersion("4.0")]
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/code-analysis/ServiceAnalysis/Amplify/Properties/AssemblyInfo.cs b/sdk/code-analysis/ServiceAnalysis/Amplify/Properties/AssemblyInfo.cs
index a1b80f40f26c..3d5a3c68536c 100644
--- a/sdk/code-analysis/ServiceAnalysis/Amplify/Properties/AssemblyInfo.cs
+++ b/sdk/code-analysis/ServiceAnalysis/Amplify/Properties/AssemblyInfo.cs
@@ -28,5 +28,5 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.302.0")]
\ No newline at end of file
+[assembly: AssemblyVersion("4.0")]
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/code-analysis/ServiceAnalysis/AmplifyBackend/Properties/AssemblyInfo.cs b/sdk/code-analysis/ServiceAnalysis/AmplifyBackend/Properties/AssemblyInfo.cs
index a190156a56ac..b216726af112 100644
--- a/sdk/code-analysis/ServiceAnalysis/AmplifyBackend/Properties/AssemblyInfo.cs
+++ b/sdk/code-analysis/ServiceAnalysis/AmplifyBackend/Properties/AssemblyInfo.cs
@@ -28,5 +28,5 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.300.84")]
\ No newline at end of file
+[assembly: AssemblyVersion("4.0")]
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/code-analysis/ServiceAnalysis/AmplifyUIBuilder/Properties/AssemblyInfo.cs b/sdk/code-analysis/ServiceAnalysis/AmplifyUIBuilder/Properties/AssemblyInfo.cs
index fff8e4d8ad33..65ecd1d0b893 100644
--- a/sdk/code-analysis/ServiceAnalysis/AmplifyUIBuilder/Properties/AssemblyInfo.cs
+++ b/sdk/code-analysis/ServiceAnalysis/AmplifyUIBuilder/Properties/AssemblyInfo.cs
@@ -28,5 +28,5 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.301.31")]
\ No newline at end of file
+[assembly: AssemblyVersion("4.0")]
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/code-analysis/ServiceAnalysis/ApiGatewayManagementApi/Properties/AssemblyInfo.cs b/sdk/code-analysis/ServiceAnalysis/ApiGatewayManagementApi/Properties/AssemblyInfo.cs
index 12c1cc061b49..03761dd8f3c3 100644
--- a/sdk/code-analysis/ServiceAnalysis/ApiGatewayManagementApi/Properties/AssemblyInfo.cs
+++ b/sdk/code-analysis/ServiceAnalysis/ApiGatewayManagementApi/Properties/AssemblyInfo.cs
@@ -28,5 +28,5 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.300.84")]
\ No newline at end of file
+[assembly: AssemblyVersion("4.0")]
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/code-analysis/ServiceAnalysis/ApiGatewayV2/Properties/AssemblyInfo.cs b/sdk/code-analysis/ServiceAnalysis/ApiGatewayV2/Properties/AssemblyInfo.cs
index 1484e64fc459..2780b064383d 100644
--- a/sdk/code-analysis/ServiceAnalysis/ApiGatewayV2/Properties/AssemblyInfo.cs
+++ b/sdk/code-analysis/ServiceAnalysis/ApiGatewayV2/Properties/AssemblyInfo.cs
@@ -28,5 +28,5 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.300.84")]
\ No newline at end of file
+[assembly: AssemblyVersion("4.0")]
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/code-analysis/ServiceAnalysis/AppConfig/Properties/AssemblyInfo.cs b/sdk/code-analysis/ServiceAnalysis/AppConfig/Properties/AssemblyInfo.cs
index 1ad9cc2904cf..3ec0f0452d7e 100644
--- a/sdk/code-analysis/ServiceAnalysis/AppConfig/Properties/AssemblyInfo.cs
+++ b/sdk/code-analysis/ServiceAnalysis/AppConfig/Properties/AssemblyInfo.cs
@@ -28,5 +28,5 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.301.30")]
\ No newline at end of file
+[assembly: AssemblyVersion("4.0")]
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/code-analysis/ServiceAnalysis/AppConfigData/Properties/AssemblyInfo.cs b/sdk/code-analysis/ServiceAnalysis/AppConfigData/Properties/AssemblyInfo.cs
index 9783f6a1191d..730f92fc1b1f 100644
--- a/sdk/code-analysis/ServiceAnalysis/AppConfigData/Properties/AssemblyInfo.cs
+++ b/sdk/code-analysis/ServiceAnalysis/AppConfigData/Properties/AssemblyInfo.cs
@@ -28,5 +28,5 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.301.45")]
\ No newline at end of file
+[assembly: AssemblyVersion("4.0")]
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/code-analysis/ServiceAnalysis/AppFabric/Properties/AssemblyInfo.cs b/sdk/code-analysis/ServiceAnalysis/AppFabric/Properties/AssemblyInfo.cs
index f98646eb2926..cd035f948d56 100644
--- a/sdk/code-analysis/ServiceAnalysis/AppFabric/Properties/AssemblyInfo.cs
+++ b/sdk/code-analysis/ServiceAnalysis/AppFabric/Properties/AssemblyInfo.cs
@@ -28,5 +28,5 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.300.84")]
\ No newline at end of file
+[assembly: AssemblyVersion("4.0")]
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/code-analysis/ServiceAnalysis/AppIntegrationsService/Properties/AssemblyInfo.cs b/sdk/code-analysis/ServiceAnalysis/AppIntegrationsService/Properties/AssemblyInfo.cs
index 359a4c2d232d..74f5c7798971 100644
--- a/sdk/code-analysis/ServiceAnalysis/AppIntegrationsService/Properties/AssemblyInfo.cs
+++ b/sdk/code-analysis/ServiceAnalysis/AppIntegrationsService/Properties/AssemblyInfo.cs
@@ -28,5 +28,5 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.301.60")]
\ No newline at end of file
+[assembly: AssemblyVersion("4.0")]
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/code-analysis/ServiceAnalysis/AppMesh/Properties/AssemblyInfo.cs b/sdk/code-analysis/ServiceAnalysis/AppMesh/Properties/AssemblyInfo.cs
index b221088752f5..f1856d564d12 100644
--- a/sdk/code-analysis/ServiceAnalysis/AppMesh/Properties/AssemblyInfo.cs
+++ b/sdk/code-analysis/ServiceAnalysis/AppMesh/Properties/AssemblyInfo.cs
@@ -28,5 +28,5 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.301.79")]
\ No newline at end of file
+[assembly: AssemblyVersion("4.0")]
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/code-analysis/ServiceAnalysis/AppRegistry/Properties/AssemblyInfo.cs b/sdk/code-analysis/ServiceAnalysis/AppRegistry/Properties/AssemblyInfo.cs
index c7a47d9eaffc..bccdb2a48ccb 100644
--- a/sdk/code-analysis/ServiceAnalysis/AppRegistry/Properties/AssemblyInfo.cs
+++ b/sdk/code-analysis/ServiceAnalysis/AppRegistry/Properties/AssemblyInfo.cs
@@ -28,5 +28,5 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.301.83")]
\ No newline at end of file
+[assembly: AssemblyVersion("4.0")]
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/code-analysis/ServiceAnalysis/AppRunner/Properties/AssemblyInfo.cs b/sdk/code-analysis/ServiceAnalysis/AppRunner/Properties/AssemblyInfo.cs
index 25e28aaf3d18..2418512d43b6 100644
--- a/sdk/code-analysis/ServiceAnalysis/AppRunner/Properties/AssemblyInfo.cs
+++ b/sdk/code-analysis/ServiceAnalysis/AppRunner/Properties/AssemblyInfo.cs
@@ -28,5 +28,5 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.301.56")]
\ No newline at end of file
+[assembly: AssemblyVersion("4.0")]
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/code-analysis/ServiceAnalysis/AppStream/Properties/AssemblyInfo.cs b/sdk/code-analysis/ServiceAnalysis/AppStream/Properties/AssemblyInfo.cs
index 1a4215e66511..4e6d89784392 100644
--- a/sdk/code-analysis/ServiceAnalysis/AppStream/Properties/AssemblyInfo.cs
+++ b/sdk/code-analysis/ServiceAnalysis/AppStream/Properties/AssemblyInfo.cs
@@ -28,5 +28,5 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.302.61")]
\ No newline at end of file
+[assembly: AssemblyVersion("4.0")]
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/code-analysis/ServiceAnalysis/AppSync/Properties/AssemblyInfo.cs b/sdk/code-analysis/ServiceAnalysis/AppSync/Properties/AssemblyInfo.cs
index f66b5265f5f7..7e4c6c9a3ff3 100644
--- a/sdk/code-analysis/ServiceAnalysis/AppSync/Properties/AssemblyInfo.cs
+++ b/sdk/code-analysis/ServiceAnalysis/AppSync/Properties/AssemblyInfo.cs
@@ -28,5 +28,5 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.305.2")]
\ No newline at end of file
+[assembly: AssemblyVersion("4.0")]
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/code-analysis/ServiceAnalysis/Appflow/Properties/AssemblyInfo.cs b/sdk/code-analysis/ServiceAnalysis/Appflow/Properties/AssemblyInfo.cs
index fe98aba3c175..75e14215e57b 100644
--- a/sdk/code-analysis/ServiceAnalysis/Appflow/Properties/AssemblyInfo.cs
+++ b/sdk/code-analysis/ServiceAnalysis/Appflow/Properties/AssemblyInfo.cs
@@ -28,5 +28,5 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.300.84")]
\ No newline at end of file
+[assembly: AssemblyVersion("4.0")]
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/code-analysis/ServiceAnalysis/ApplicationAutoScaling/Properties/AssemblyInfo.cs b/sdk/code-analysis/ServiceAnalysis/ApplicationAutoScaling/Properties/AssemblyInfo.cs
index b0f57840285e..1682f102d213 100644
--- a/sdk/code-analysis/ServiceAnalysis/ApplicationAutoScaling/Properties/AssemblyInfo.cs
+++ b/sdk/code-analysis/ServiceAnalysis/ApplicationAutoScaling/Properties/AssemblyInfo.cs
@@ -28,5 +28,5 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.301.73")]
\ No newline at end of file
+[assembly: AssemblyVersion("4.0")]
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/code-analysis/ServiceAnalysis/ApplicationCostProfiler/Properties/AssemblyInfo.cs b/sdk/code-analysis/ServiceAnalysis/ApplicationCostProfiler/Properties/AssemblyInfo.cs
index 78f13d11a68e..8606c7e3a383 100644
--- a/sdk/code-analysis/ServiceAnalysis/ApplicationCostProfiler/Properties/AssemblyInfo.cs
+++ b/sdk/code-analysis/ServiceAnalysis/ApplicationCostProfiler/Properties/AssemblyInfo.cs
@@ -28,5 +28,5 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.300.84")]
\ No newline at end of file
+[assembly: AssemblyVersion("4.0")]
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/code-analysis/ServiceAnalysis/ApplicationDiscoveryService/Properties/AssemblyInfo.cs b/sdk/code-analysis/ServiceAnalysis/ApplicationDiscoveryService/Properties/AssemblyInfo.cs
index 390127fae80b..cb10d4219c38 100644
--- a/sdk/code-analysis/ServiceAnalysis/ApplicationDiscoveryService/Properties/AssemblyInfo.cs
+++ b/sdk/code-analysis/ServiceAnalysis/ApplicationDiscoveryService/Properties/AssemblyInfo.cs
@@ -28,5 +28,5 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.300.84")]
\ No newline at end of file
+[assembly: AssemblyVersion("4.0")]
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/code-analysis/ServiceAnalysis/ApplicationInsights/Properties/AssemblyInfo.cs b/sdk/code-analysis/ServiceAnalysis/ApplicationInsights/Properties/AssemblyInfo.cs
index 5421c24aec9e..011741629b8e 100644
--- a/sdk/code-analysis/ServiceAnalysis/ApplicationInsights/Properties/AssemblyInfo.cs
+++ b/sdk/code-analysis/ServiceAnalysis/ApplicationInsights/Properties/AssemblyInfo.cs
@@ -28,5 +28,5 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.300.84")]
\ No newline at end of file
+[assembly: AssemblyVersion("4.0")]
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/code-analysis/ServiceAnalysis/Artifact/Properties/AssemblyInfo.cs b/sdk/code-analysis/ServiceAnalysis/Artifact/Properties/AssemblyInfo.cs
index f6c7db29d674..b42803463f35 100644
--- a/sdk/code-analysis/ServiceAnalysis/Artifact/Properties/AssemblyInfo.cs
+++ b/sdk/code-analysis/ServiceAnalysis/Artifact/Properties/AssemblyInfo.cs
@@ -28,5 +28,5 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.300.33")]
\ No newline at end of file
+[assembly: AssemblyVersion("4.0")]
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/code-analysis/ServiceAnalysis/Athena/Properties/AssemblyInfo.cs b/sdk/code-analysis/ServiceAnalysis/Athena/Properties/AssemblyInfo.cs
index 024c9e9396b4..a1cdf7aab844 100644
--- a/sdk/code-analysis/ServiceAnalysis/Athena/Properties/AssemblyInfo.cs
+++ b/sdk/code-analysis/ServiceAnalysis/Athena/Properties/AssemblyInfo.cs
@@ -28,5 +28,5 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.303.45")]
\ No newline at end of file
+[assembly: AssemblyVersion("4.0")]
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/code-analysis/ServiceAnalysis/AuditManager/Properties/AssemblyInfo.cs b/sdk/code-analysis/ServiceAnalysis/AuditManager/Properties/AssemblyInfo.cs
index 835554c55684..6e0d78482bb4 100644
--- a/sdk/code-analysis/ServiceAnalysis/AuditManager/Properties/AssemblyInfo.cs
+++ b/sdk/code-analysis/ServiceAnalysis/AuditManager/Properties/AssemblyInfo.cs
@@ -28,5 +28,5 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.300.84")]
\ No newline at end of file
+[assembly: AssemblyVersion("4.0")]
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/code-analysis/ServiceAnalysis/AugmentedAIRuntime/Properties/AssemblyInfo.cs b/sdk/code-analysis/ServiceAnalysis/AugmentedAIRuntime/Properties/AssemblyInfo.cs
index 2afc71314e5b..554c4f1fc0eb 100644
--- a/sdk/code-analysis/ServiceAnalysis/AugmentedAIRuntime/Properties/AssemblyInfo.cs
+++ b/sdk/code-analysis/ServiceAnalysis/AugmentedAIRuntime/Properties/AssemblyInfo.cs
@@ -28,5 +28,5 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.300.84")]
\ No newline at end of file
+[assembly: AssemblyVersion("4.0")]
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/code-analysis/ServiceAnalysis/AutoScaling/Properties/AssemblyInfo.cs b/sdk/code-analysis/ServiceAnalysis/AutoScaling/Properties/AssemblyInfo.cs
index 22184763ae76..2a4e89b00be1 100644
--- a/sdk/code-analysis/ServiceAnalysis/AutoScaling/Properties/AssemblyInfo.cs
+++ b/sdk/code-analysis/ServiceAnalysis/AutoScaling/Properties/AssemblyInfo.cs
@@ -28,5 +28,5 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.302.43")]
\ No newline at end of file
+[assembly: AssemblyVersion("4.0")]
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/code-analysis/ServiceAnalysis/AutoScalingPlans/Properties/AssemblyInfo.cs b/sdk/code-analysis/ServiceAnalysis/AutoScalingPlans/Properties/AssemblyInfo.cs
index f34079d664db..ba353347fd86 100644
--- a/sdk/code-analysis/ServiceAnalysis/AutoScalingPlans/Properties/AssemblyInfo.cs
+++ b/sdk/code-analysis/ServiceAnalysis/AutoScalingPlans/Properties/AssemblyInfo.cs
@@ -28,5 +28,5 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.300.84")]
\ No newline at end of file
+[assembly: AssemblyVersion("4.0")]
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/code-analysis/ServiceAnalysis/B2bi/Properties/AssemblyInfo.cs b/sdk/code-analysis/ServiceAnalysis/B2bi/Properties/AssemblyInfo.cs
index e7be72907e6a..6ed5ad0403be 100644
--- a/sdk/code-analysis/ServiceAnalysis/B2bi/Properties/AssemblyInfo.cs
+++ b/sdk/code-analysis/ServiceAnalysis/B2bi/Properties/AssemblyInfo.cs
@@ -28,5 +28,5 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.303.15")]
\ No newline at end of file
+[assembly: AssemblyVersion("4.0")]
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/code-analysis/ServiceAnalysis/BCMDataExports/Properties/AssemblyInfo.cs b/sdk/code-analysis/ServiceAnalysis/BCMDataExports/Properties/AssemblyInfo.cs
index 61a83897d049..dbfe3250edb6 100644
--- a/sdk/code-analysis/ServiceAnalysis/BCMDataExports/Properties/AssemblyInfo.cs
+++ b/sdk/code-analysis/ServiceAnalysis/BCMDataExports/Properties/AssemblyInfo.cs
@@ -28,5 +28,5 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.300.76")]
\ No newline at end of file
+[assembly: AssemblyVersion("4.0")]
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/code-analysis/ServiceAnalysis/Backup/Properties/AssemblyInfo.cs b/sdk/code-analysis/ServiceAnalysis/Backup/Properties/AssemblyInfo.cs
index 56641819928c..81914e48dc1f 100644
--- a/sdk/code-analysis/ServiceAnalysis/Backup/Properties/AssemblyInfo.cs
+++ b/sdk/code-analysis/ServiceAnalysis/Backup/Properties/AssemblyInfo.cs
@@ -28,5 +28,5 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.304.26")]
\ No newline at end of file
+[assembly: AssemblyVersion("4.0")]
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/code-analysis/ServiceAnalysis/BackupGateway/Properties/AssemblyInfo.cs b/sdk/code-analysis/ServiceAnalysis/BackupGateway/Properties/AssemblyInfo.cs
index c1a86d74c7d1..2f63c92530a5 100644
--- a/sdk/code-analysis/ServiceAnalysis/BackupGateway/Properties/AssemblyInfo.cs
+++ b/sdk/code-analysis/ServiceAnalysis/BackupGateway/Properties/AssemblyInfo.cs
@@ -28,5 +28,5 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.300.84")]
\ No newline at end of file
+[assembly: AssemblyVersion("4.0")]
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/code-analysis/ServiceAnalysis/BackupStorage/Properties/AssemblyInfo.cs b/sdk/code-analysis/ServiceAnalysis/BackupStorage/Properties/AssemblyInfo.cs
index 1f4a8e683e2e..6de80b3f2449 100644
--- a/sdk/code-analysis/ServiceAnalysis/BackupStorage/Properties/AssemblyInfo.cs
+++ b/sdk/code-analysis/ServiceAnalysis/BackupStorage/Properties/AssemblyInfo.cs
@@ -28,5 +28,5 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.300.84")]
\ No newline at end of file
+[assembly: AssemblyVersion("4.0")]
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/code-analysis/ServiceAnalysis/Batch/Properties/AssemblyInfo.cs b/sdk/code-analysis/ServiceAnalysis/Batch/Properties/AssemblyInfo.cs
index 933534da339f..9f9ca1e182b7 100644
--- a/sdk/code-analysis/ServiceAnalysis/Batch/Properties/AssemblyInfo.cs
+++ b/sdk/code-analysis/ServiceAnalysis/Batch/Properties/AssemblyInfo.cs
@@ -28,5 +28,5 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.305.10")]
\ No newline at end of file
+[assembly: AssemblyVersion("4.0")]
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/code-analysis/ServiceAnalysis/Bedrock/Properties/AssemblyInfo.cs b/sdk/code-analysis/ServiceAnalysis/Bedrock/Properties/AssemblyInfo.cs
index 02d07f6e1092..bd8b5ddac241 100644
--- a/sdk/code-analysis/ServiceAnalysis/Bedrock/Properties/AssemblyInfo.cs
+++ b/sdk/code-analysis/ServiceAnalysis/Bedrock/Properties/AssemblyInfo.cs
@@ -28,5 +28,5 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.302.4")]
\ No newline at end of file
+[assembly: AssemblyVersion("4.0")]
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/code-analysis/ServiceAnalysis/BedrockAgent/Properties/AssemblyInfo.cs b/sdk/code-analysis/ServiceAnalysis/BedrockAgent/Properties/AssemblyInfo.cs
index efb3550a1254..f4520bec939e 100644
--- a/sdk/code-analysis/ServiceAnalysis/BedrockAgent/Properties/AssemblyInfo.cs
+++ b/sdk/code-analysis/ServiceAnalysis/BedrockAgent/Properties/AssemblyInfo.cs
@@ -28,5 +28,5 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.306.4")]
\ No newline at end of file
+[assembly: AssemblyVersion("4.0")]
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/code-analysis/ServiceAnalysis/BedrockAgentRuntime/Properties/AssemblyInfo.cs b/sdk/code-analysis/ServiceAnalysis/BedrockAgentRuntime/Properties/AssemblyInfo.cs
index 0629fd1cc86d..d631157122b9 100644
--- a/sdk/code-analysis/ServiceAnalysis/BedrockAgentRuntime/Properties/AssemblyInfo.cs
+++ b/sdk/code-analysis/ServiceAnalysis/BedrockAgentRuntime/Properties/AssemblyInfo.cs
@@ -28,5 +28,5 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.305.4")]
\ No newline at end of file
+[assembly: AssemblyVersion("4.0")]
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/code-analysis/ServiceAnalysis/BedrockRuntime/Properties/AssemblyInfo.cs b/sdk/code-analysis/ServiceAnalysis/BedrockRuntime/Properties/AssemblyInfo.cs
index f0f02703bf8d..e846100327ed 100644
--- a/sdk/code-analysis/ServiceAnalysis/BedrockRuntime/Properties/AssemblyInfo.cs
+++ b/sdk/code-analysis/ServiceAnalysis/BedrockRuntime/Properties/AssemblyInfo.cs
@@ -28,5 +28,5 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.302.4")]
\ No newline at end of file
+[assembly: AssemblyVersion("4.0")]
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/code-analysis/ServiceAnalysis/BillingConductor/Properties/AssemblyInfo.cs b/sdk/code-analysis/ServiceAnalysis/BillingConductor/Properties/AssemblyInfo.cs
index dbdb3cea2f85..7ff7d0930508 100644
--- a/sdk/code-analysis/ServiceAnalysis/BillingConductor/Properties/AssemblyInfo.cs
+++ b/sdk/code-analysis/ServiceAnalysis/BillingConductor/Properties/AssemblyInfo.cs
@@ -28,5 +28,5 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.302.65")]
\ No newline at end of file
+[assembly: AssemblyVersion("4.0")]
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/code-analysis/ServiceAnalysis/Braket/Properties/AssemblyInfo.cs b/sdk/code-analysis/ServiceAnalysis/Braket/Properties/AssemblyInfo.cs
index 9b31b7d8e3f8..20b8c525ec90 100644
--- a/sdk/code-analysis/ServiceAnalysis/Braket/Properties/AssemblyInfo.cs
+++ b/sdk/code-analysis/ServiceAnalysis/Braket/Properties/AssemblyInfo.cs
@@ -28,5 +28,5 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.302.36")]
\ No newline at end of file
+[assembly: AssemblyVersion("4.0")]
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/code-analysis/ServiceAnalysis/Budgets/Properties/AssemblyInfo.cs b/sdk/code-analysis/ServiceAnalysis/Budgets/Properties/AssemblyInfo.cs
index e141541a5009..9a20f8c60f2b 100644
--- a/sdk/code-analysis/ServiceAnalysis/Budgets/Properties/AssemblyInfo.cs
+++ b/sdk/code-analysis/ServiceAnalysis/Budgets/Properties/AssemblyInfo.cs
@@ -28,5 +28,5 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.300.84")]
\ No newline at end of file
+[assembly: AssemblyVersion("4.0")]
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/code-analysis/ServiceAnalysis/CertificateManager/Properties/AssemblyInfo.cs b/sdk/code-analysis/ServiceAnalysis/CertificateManager/Properties/AssemblyInfo.cs
index 318898f9665f..0af74cd935f6 100644
--- a/sdk/code-analysis/ServiceAnalysis/CertificateManager/Properties/AssemblyInfo.cs
+++ b/sdk/code-analysis/ServiceAnalysis/CertificateManager/Properties/AssemblyInfo.cs
@@ -28,5 +28,5 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.300.84")]
\ No newline at end of file
+[assembly: AssemblyVersion("4.0")]
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/code-analysis/ServiceAnalysis/Chatbot/Properties/AssemblyInfo.cs b/sdk/code-analysis/ServiceAnalysis/Chatbot/Properties/AssemblyInfo.cs
index 4af16f237963..9d24bbfa923f 100644
--- a/sdk/code-analysis/ServiceAnalysis/Chatbot/Properties/AssemblyInfo.cs
+++ b/sdk/code-analysis/ServiceAnalysis/Chatbot/Properties/AssemblyInfo.cs
@@ -28,5 +28,5 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.300.33")]
\ No newline at end of file
+[assembly: AssemblyVersion("4.0")]
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/code-analysis/ServiceAnalysis/Chime/Properties/AssemblyInfo.cs b/sdk/code-analysis/ServiceAnalysis/Chime/Properties/AssemblyInfo.cs
index 40a936a87aba..d1dfa9f12102 100644
--- a/sdk/code-analysis/ServiceAnalysis/Chime/Properties/AssemblyInfo.cs
+++ b/sdk/code-analysis/ServiceAnalysis/Chime/Properties/AssemblyInfo.cs
@@ -28,5 +28,5 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.300.84")]
\ No newline at end of file
+[assembly: AssemblyVersion("4.0")]
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/code-analysis/ServiceAnalysis/ChimeSDKIdentity/Properties/AssemblyInfo.cs b/sdk/code-analysis/ServiceAnalysis/ChimeSDKIdentity/Properties/AssemblyInfo.cs
index ebc8bed0664b..faa621b3fabc 100644
--- a/sdk/code-analysis/ServiceAnalysis/ChimeSDKIdentity/Properties/AssemblyInfo.cs
+++ b/sdk/code-analysis/ServiceAnalysis/ChimeSDKIdentity/Properties/AssemblyInfo.cs
@@ -28,5 +28,5 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.300.84")]
\ No newline at end of file
+[assembly: AssemblyVersion("4.0")]
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/code-analysis/ServiceAnalysis/ChimeSDKMediaPipelines/Properties/AssemblyInfo.cs b/sdk/code-analysis/ServiceAnalysis/ChimeSDKMediaPipelines/Properties/AssemblyInfo.cs
index fb7754e6097c..4c5c4b0851ad 100644
--- a/sdk/code-analysis/ServiceAnalysis/ChimeSDKMediaPipelines/Properties/AssemblyInfo.cs
+++ b/sdk/code-analysis/ServiceAnalysis/ChimeSDKMediaPipelines/Properties/AssemblyInfo.cs
@@ -28,5 +28,5 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.300.84")]
\ No newline at end of file
+[assembly: AssemblyVersion("4.0")]
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/code-analysis/ServiceAnalysis/ChimeSDKMeetings/Properties/AssemblyInfo.cs b/sdk/code-analysis/ServiceAnalysis/ChimeSDKMeetings/Properties/AssemblyInfo.cs
index 06904ecf2ad0..5d066c4ca2fc 100644
--- a/sdk/code-analysis/ServiceAnalysis/ChimeSDKMeetings/Properties/AssemblyInfo.cs
+++ b/sdk/code-analysis/ServiceAnalysis/ChimeSDKMeetings/Properties/AssemblyInfo.cs
@@ -28,5 +28,5 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.301.62")]
\ No newline at end of file
+[assembly: AssemblyVersion("4.0")]
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/code-analysis/ServiceAnalysis/ChimeSDKMessaging/Properties/AssemblyInfo.cs b/sdk/code-analysis/ServiceAnalysis/ChimeSDKMessaging/Properties/AssemblyInfo.cs
index 4c6ea39237e0..70b37e272b4c 100644
--- a/sdk/code-analysis/ServiceAnalysis/ChimeSDKMessaging/Properties/AssemblyInfo.cs
+++ b/sdk/code-analysis/ServiceAnalysis/ChimeSDKMessaging/Properties/AssemblyInfo.cs
@@ -28,5 +28,5 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.300.84")]
\ No newline at end of file
+[assembly: AssemblyVersion("4.0")]
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/code-analysis/ServiceAnalysis/ChimeSDKVoice/Properties/AssemblyInfo.cs b/sdk/code-analysis/ServiceAnalysis/ChimeSDKVoice/Properties/AssemblyInfo.cs
index 8ab510c01ca1..00614720c822 100644
--- a/sdk/code-analysis/ServiceAnalysis/ChimeSDKVoice/Properties/AssemblyInfo.cs
+++ b/sdk/code-analysis/ServiceAnalysis/ChimeSDKVoice/Properties/AssemblyInfo.cs
@@ -28,5 +28,5 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.301.0")]
\ No newline at end of file
+[assembly: AssemblyVersion("4.0")]
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/code-analysis/ServiceAnalysis/CleanRooms/Properties/AssemblyInfo.cs b/sdk/code-analysis/ServiceAnalysis/CleanRooms/Properties/AssemblyInfo.cs
index f32e7939fe37..c90492011097 100644
--- a/sdk/code-analysis/ServiceAnalysis/CleanRooms/Properties/AssemblyInfo.cs
+++ b/sdk/code-analysis/ServiceAnalysis/CleanRooms/Properties/AssemblyInfo.cs
@@ -28,5 +28,5 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.304.11")]
\ No newline at end of file
+[assembly: AssemblyVersion("4.0")]
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/code-analysis/ServiceAnalysis/CleanRoomsML/Properties/AssemblyInfo.cs b/sdk/code-analysis/ServiceAnalysis/CleanRoomsML/Properties/AssemblyInfo.cs
index 27b6d79d7118..08263a71e8ce 100644
--- a/sdk/code-analysis/ServiceAnalysis/CleanRoomsML/Properties/AssemblyInfo.cs
+++ b/sdk/code-analysis/ServiceAnalysis/CleanRoomsML/Properties/AssemblyInfo.cs
@@ -28,5 +28,5 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.302.16")]
\ No newline at end of file
+[assembly: AssemblyVersion("4.0")]
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/code-analysis/ServiceAnalysis/Cloud9/Properties/AssemblyInfo.cs b/sdk/code-analysis/ServiceAnalysis/Cloud9/Properties/AssemblyInfo.cs
index 665ffa24e260..1059f420da32 100644
--- a/sdk/code-analysis/ServiceAnalysis/Cloud9/Properties/AssemblyInfo.cs
+++ b/sdk/code-analysis/ServiceAnalysis/Cloud9/Properties/AssemblyInfo.cs
@@ -28,5 +28,5 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.301.72")]
\ No newline at end of file
+[assembly: AssemblyVersion("4.0")]
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/code-analysis/ServiceAnalysis/CloudControlApi/Properties/AssemblyInfo.cs b/sdk/code-analysis/ServiceAnalysis/CloudControlApi/Properties/AssemblyInfo.cs
index 36bb08333aaa..f3db74618874 100644
--- a/sdk/code-analysis/ServiceAnalysis/CloudControlApi/Properties/AssemblyInfo.cs
+++ b/sdk/code-analysis/ServiceAnalysis/CloudControlApi/Properties/AssemblyInfo.cs
@@ -28,5 +28,5 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.300.84")]
\ No newline at end of file
+[assembly: AssemblyVersion("4.0")]
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/code-analysis/ServiceAnalysis/CloudDirectory/Properties/AssemblyInfo.cs b/sdk/code-analysis/ServiceAnalysis/CloudDirectory/Properties/AssemblyInfo.cs
index 28dd887d30fa..27dab7668a92 100644
--- a/sdk/code-analysis/ServiceAnalysis/CloudDirectory/Properties/AssemblyInfo.cs
+++ b/sdk/code-analysis/ServiceAnalysis/CloudDirectory/Properties/AssemblyInfo.cs
@@ -28,5 +28,5 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.300.84")]
\ No newline at end of file
+[assembly: AssemblyVersion("4.0")]
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/code-analysis/ServiceAnalysis/CloudFormation/Properties/AssemblyInfo.cs b/sdk/code-analysis/ServiceAnalysis/CloudFormation/Properties/AssemblyInfo.cs
index aaffa995a8a4..e05c5667e41e 100644
--- a/sdk/code-analysis/ServiceAnalysis/CloudFormation/Properties/AssemblyInfo.cs
+++ b/sdk/code-analysis/ServiceAnalysis/CloudFormation/Properties/AssemblyInfo.cs
@@ -28,5 +28,5 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.307.10")]
\ No newline at end of file
+[assembly: AssemblyVersion("4.0")]
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/code-analysis/ServiceAnalysis/CloudFront/Properties/AssemblyInfo.cs b/sdk/code-analysis/ServiceAnalysis/CloudFront/Properties/AssemblyInfo.cs
index 5cf83def3e09..e7d7e9affbd4 100644
--- a/sdk/code-analysis/ServiceAnalysis/CloudFront/Properties/AssemblyInfo.cs
+++ b/sdk/code-analysis/ServiceAnalysis/CloudFront/Properties/AssemblyInfo.cs
@@ -28,5 +28,5 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3.4.0")]
-[assembly: AssemblyFileVersion("3.7.302.10")]
\ No newline at end of file
+[assembly: AssemblyVersion("4.0")]
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/code-analysis/ServiceAnalysis/CloudFrontKeyValueStore/Properties/AssemblyInfo.cs b/sdk/code-analysis/ServiceAnalysis/CloudFrontKeyValueStore/Properties/AssemblyInfo.cs
index ad7daf31bc88..6620fe754ddb 100644
--- a/sdk/code-analysis/ServiceAnalysis/CloudFrontKeyValueStore/Properties/AssemblyInfo.cs
+++ b/sdk/code-analysis/ServiceAnalysis/CloudFrontKeyValueStore/Properties/AssemblyInfo.cs
@@ -28,5 +28,5 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.301.45")]
\ No newline at end of file
+[assembly: AssemblyVersion("4.0")]
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/code-analysis/ServiceAnalysis/CloudHSM/Properties/AssemblyInfo.cs b/sdk/code-analysis/ServiceAnalysis/CloudHSM/Properties/AssemblyInfo.cs
index 7be09d033e8c..dc643e425db7 100644
--- a/sdk/code-analysis/ServiceAnalysis/CloudHSM/Properties/AssemblyInfo.cs
+++ b/sdk/code-analysis/ServiceAnalysis/CloudHSM/Properties/AssemblyInfo.cs
@@ -28,5 +28,5 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.300.84")]
\ No newline at end of file
+[assembly: AssemblyVersion("4.0")]
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/code-analysis/ServiceAnalysis/CloudHSMV2/Properties/AssemblyInfo.cs b/sdk/code-analysis/ServiceAnalysis/CloudHSMV2/Properties/AssemblyInfo.cs
index e0396c46f688..e9675813a0e5 100644
--- a/sdk/code-analysis/ServiceAnalysis/CloudHSMV2/Properties/AssemblyInfo.cs
+++ b/sdk/code-analysis/ServiceAnalysis/CloudHSMV2/Properties/AssemblyInfo.cs
@@ -28,5 +28,5 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.300.84")]
\ No newline at end of file
+[assembly: AssemblyVersion("4.0")]
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/code-analysis/ServiceAnalysis/CloudSearch/Properties/AssemblyInfo.cs b/sdk/code-analysis/ServiceAnalysis/CloudSearch/Properties/AssemblyInfo.cs
index a8f664cc0ef7..daa3ce766599 100644
--- a/sdk/code-analysis/ServiceAnalysis/CloudSearch/Properties/AssemblyInfo.cs
+++ b/sdk/code-analysis/ServiceAnalysis/CloudSearch/Properties/AssemblyInfo.cs
@@ -28,5 +28,5 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.300.84")]
\ No newline at end of file
+[assembly: AssemblyVersion("4.0")]
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/code-analysis/ServiceAnalysis/CloudSearchDomain/Properties/AssemblyInfo.cs b/sdk/code-analysis/ServiceAnalysis/CloudSearchDomain/Properties/AssemblyInfo.cs
index 43a685b9cd56..f7a500d7d012 100644
--- a/sdk/code-analysis/ServiceAnalysis/CloudSearchDomain/Properties/AssemblyInfo.cs
+++ b/sdk/code-analysis/ServiceAnalysis/CloudSearchDomain/Properties/AssemblyInfo.cs
@@ -28,5 +28,5 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.300.84")]
\ No newline at end of file
+[assembly: AssemblyVersion("4.0")]
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/code-analysis/ServiceAnalysis/CloudTrail/Properties/AssemblyInfo.cs b/sdk/code-analysis/ServiceAnalysis/CloudTrail/Properties/AssemblyInfo.cs
index ee1247a21057..99bc8d961ed7 100644
--- a/sdk/code-analysis/ServiceAnalysis/CloudTrail/Properties/AssemblyInfo.cs
+++ b/sdk/code-analysis/ServiceAnalysis/CloudTrail/Properties/AssemblyInfo.cs
@@ -28,5 +28,5 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.304.29")]
\ No newline at end of file
+[assembly: AssemblyVersion("4.0")]
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/code-analysis/ServiceAnalysis/CloudTrailData/Properties/AssemblyInfo.cs b/sdk/code-analysis/ServiceAnalysis/CloudTrailData/Properties/AssemblyInfo.cs
index b0fb606a5115..e74a18fd01dd 100644
--- a/sdk/code-analysis/ServiceAnalysis/CloudTrailData/Properties/AssemblyInfo.cs
+++ b/sdk/code-analysis/ServiceAnalysis/CloudTrailData/Properties/AssemblyInfo.cs
@@ -28,5 +28,5 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.300.84")]
\ No newline at end of file
+[assembly: AssemblyVersion("4.0")]
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/code-analysis/ServiceAnalysis/CloudWatch/Properties/AssemblyInfo.cs b/sdk/code-analysis/ServiceAnalysis/CloudWatch/Properties/AssemblyInfo.cs
index b2f5882b4e53..187f0a6e3e21 100644
--- a/sdk/code-analysis/ServiceAnalysis/CloudWatch/Properties/AssemblyInfo.cs
+++ b/sdk/code-analysis/ServiceAnalysis/CloudWatch/Properties/AssemblyInfo.cs
@@ -28,5 +28,5 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.304.10")]
\ No newline at end of file
+[assembly: AssemblyVersion("4.0")]
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/code-analysis/ServiceAnalysis/CloudWatchEvents/Properties/AssemblyInfo.cs b/sdk/code-analysis/ServiceAnalysis/CloudWatchEvents/Properties/AssemblyInfo.cs
index 3ca43f2687fa..af4b2e8e9f26 100644
--- a/sdk/code-analysis/ServiceAnalysis/CloudWatchEvents/Properties/AssemblyInfo.cs
+++ b/sdk/code-analysis/ServiceAnalysis/CloudWatchEvents/Properties/AssemblyInfo.cs
@@ -28,5 +28,5 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.300.84")]
\ No newline at end of file
+[assembly: AssemblyVersion("4.0")]
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/code-analysis/ServiceAnalysis/CloudWatchEvidently/Properties/AssemblyInfo.cs b/sdk/code-analysis/ServiceAnalysis/CloudWatchEvidently/Properties/AssemblyInfo.cs
index 77ccd57b2594..baf979742dcb 100644
--- a/sdk/code-analysis/ServiceAnalysis/CloudWatchEvidently/Properties/AssemblyInfo.cs
+++ b/sdk/code-analysis/ServiceAnalysis/CloudWatchEvidently/Properties/AssemblyInfo.cs
@@ -28,5 +28,5 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.300.84")]
\ No newline at end of file
+[assembly: AssemblyVersion("4.0")]
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/code-analysis/ServiceAnalysis/CloudWatchLogs/Properties/AssemblyInfo.cs b/sdk/code-analysis/ServiceAnalysis/CloudWatchLogs/Properties/AssemblyInfo.cs
index 1cb0e6cfe0fc..a4ed622a09aa 100644
--- a/sdk/code-analysis/ServiceAnalysis/CloudWatchLogs/Properties/AssemblyInfo.cs
+++ b/sdk/code-analysis/ServiceAnalysis/CloudWatchLogs/Properties/AssemblyInfo.cs
@@ -28,5 +28,5 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.305.25")]
\ No newline at end of file
+[assembly: AssemblyVersion("4.0")]
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/code-analysis/ServiceAnalysis/CloudWatchRUM/Properties/AssemblyInfo.cs b/sdk/code-analysis/ServiceAnalysis/CloudWatchRUM/Properties/AssemblyInfo.cs
index 04e6e5dac9af..611d0ab419b3 100644
--- a/sdk/code-analysis/ServiceAnalysis/CloudWatchRUM/Properties/AssemblyInfo.cs
+++ b/sdk/code-analysis/ServiceAnalysis/CloudWatchRUM/Properties/AssemblyInfo.cs
@@ -28,5 +28,5 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.300.85")]
\ No newline at end of file
+[assembly: AssemblyVersion("4.0")]
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/code-analysis/ServiceAnalysis/CodeArtifact/Properties/AssemblyInfo.cs b/sdk/code-analysis/ServiceAnalysis/CodeArtifact/Properties/AssemblyInfo.cs
index ce976ee2e85e..ec6d7acb89a5 100644
--- a/sdk/code-analysis/ServiceAnalysis/CodeArtifact/Properties/AssemblyInfo.cs
+++ b/sdk/code-analysis/ServiceAnalysis/CodeArtifact/Properties/AssemblyInfo.cs
@@ -28,5 +28,5 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.302.0")]
\ No newline at end of file
+[assembly: AssemblyVersion("4.0")]
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/code-analysis/ServiceAnalysis/CodeBuild/Properties/AssemblyInfo.cs b/sdk/code-analysis/ServiceAnalysis/CodeBuild/Properties/AssemblyInfo.cs
index 89681473f5e4..8663106caad3 100644
--- a/sdk/code-analysis/ServiceAnalysis/CodeBuild/Properties/AssemblyInfo.cs
+++ b/sdk/code-analysis/ServiceAnalysis/CodeBuild/Properties/AssemblyInfo.cs
@@ -28,5 +28,5 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.306.12")]
\ No newline at end of file
+[assembly: AssemblyVersion("4.0")]
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/code-analysis/ServiceAnalysis/CodeCatalyst/Properties/AssemblyInfo.cs b/sdk/code-analysis/ServiceAnalysis/CodeCatalyst/Properties/AssemblyInfo.cs
index 08791f9426bd..dd378a9feca8 100644
--- a/sdk/code-analysis/ServiceAnalysis/CodeCatalyst/Properties/AssemblyInfo.cs
+++ b/sdk/code-analysis/ServiceAnalysis/CodeCatalyst/Properties/AssemblyInfo.cs
@@ -28,5 +28,5 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.303.20")]
\ No newline at end of file
+[assembly: AssemblyVersion("4.0")]
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/code-analysis/ServiceAnalysis/CodeCommit/Properties/AssemblyInfo.cs b/sdk/code-analysis/ServiceAnalysis/CodeCommit/Properties/AssemblyInfo.cs
index 9465b96e890c..f5d895a8a74d 100644
--- a/sdk/code-analysis/ServiceAnalysis/CodeCommit/Properties/AssemblyInfo.cs
+++ b/sdk/code-analysis/ServiceAnalysis/CodeCommit/Properties/AssemblyInfo.cs
@@ -28,5 +28,5 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.301.60")]
\ No newline at end of file
+[assembly: AssemblyVersion("4.0")]
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/code-analysis/ServiceAnalysis/CodeConnections/Properties/AssemblyInfo.cs b/sdk/code-analysis/ServiceAnalysis/CodeConnections/Properties/AssemblyInfo.cs
index ab59c875da27..1ad414305ef2 100644
--- a/sdk/code-analysis/ServiceAnalysis/CodeConnections/Properties/AssemblyInfo.cs
+++ b/sdk/code-analysis/ServiceAnalysis/CodeConnections/Properties/AssemblyInfo.cs
@@ -28,5 +28,5 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.300.19")]
\ No newline at end of file
+[assembly: AssemblyVersion("4.0")]
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/code-analysis/ServiceAnalysis/CodeDeploy/Properties/AssemblyInfo.cs b/sdk/code-analysis/ServiceAnalysis/CodeDeploy/Properties/AssemblyInfo.cs
index e765892cf824..ddc18e30cb36 100644
--- a/sdk/code-analysis/ServiceAnalysis/CodeDeploy/Properties/AssemblyInfo.cs
+++ b/sdk/code-analysis/ServiceAnalysis/CodeDeploy/Properties/AssemblyInfo.cs
@@ -28,5 +28,5 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.301.68")]
\ No newline at end of file
+[assembly: AssemblyVersion("4.0")]
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/code-analysis/ServiceAnalysis/CodeGuruProfiler/Properties/AssemblyInfo.cs b/sdk/code-analysis/ServiceAnalysis/CodeGuruProfiler/Properties/AssemblyInfo.cs
index ba1a5278f137..380b5ba94e96 100644
--- a/sdk/code-analysis/ServiceAnalysis/CodeGuruProfiler/Properties/AssemblyInfo.cs
+++ b/sdk/code-analysis/ServiceAnalysis/CodeGuruProfiler/Properties/AssemblyInfo.cs
@@ -28,5 +28,5 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.300.84")]
\ No newline at end of file
+[assembly: AssemblyVersion("4.0")]
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/code-analysis/ServiceAnalysis/CodeGuruReviewer/Properties/AssemblyInfo.cs b/sdk/code-analysis/ServiceAnalysis/CodeGuruReviewer/Properties/AssemblyInfo.cs
index d3f7837948c0..6cb9bebf264a 100644
--- a/sdk/code-analysis/ServiceAnalysis/CodeGuruReviewer/Properties/AssemblyInfo.cs
+++ b/sdk/code-analysis/ServiceAnalysis/CodeGuruReviewer/Properties/AssemblyInfo.cs
@@ -28,5 +28,5 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.300.84")]
\ No newline at end of file
+[assembly: AssemblyVersion("4.0")]
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/code-analysis/ServiceAnalysis/CodeGuruSecurity/Properties/AssemblyInfo.cs b/sdk/code-analysis/ServiceAnalysis/CodeGuruSecurity/Properties/AssemblyInfo.cs
index ecad86483c94..4dba40e25ad9 100644
--- a/sdk/code-analysis/ServiceAnalysis/CodeGuruSecurity/Properties/AssemblyInfo.cs
+++ b/sdk/code-analysis/ServiceAnalysis/CodeGuruSecurity/Properties/AssemblyInfo.cs
@@ -28,5 +28,5 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.300.84")]
\ No newline at end of file
+[assembly: AssemblyVersion("4.0")]
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/code-analysis/ServiceAnalysis/CodePipeline/Properties/AssemblyInfo.cs b/sdk/code-analysis/ServiceAnalysis/CodePipeline/Properties/AssemblyInfo.cs
index 516f026a220a..88482159082a 100644
--- a/sdk/code-analysis/ServiceAnalysis/CodePipeline/Properties/AssemblyInfo.cs
+++ b/sdk/code-analysis/ServiceAnalysis/CodePipeline/Properties/AssemblyInfo.cs
@@ -28,5 +28,5 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.304.1")]
\ No newline at end of file
+[assembly: AssemblyVersion("4.0")]
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/code-analysis/ServiceAnalysis/CodeStar/Properties/AssemblyInfo.cs b/sdk/code-analysis/ServiceAnalysis/CodeStar/Properties/AssemblyInfo.cs
index 091a1054224e..49378e0724e5 100644
--- a/sdk/code-analysis/ServiceAnalysis/CodeStar/Properties/AssemblyInfo.cs
+++ b/sdk/code-analysis/ServiceAnalysis/CodeStar/Properties/AssemblyInfo.cs
@@ -28,5 +28,5 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.300.84")]
\ No newline at end of file
+[assembly: AssemblyVersion("4.0")]
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/code-analysis/ServiceAnalysis/CodeStarNotifications/Properties/AssemblyInfo.cs b/sdk/code-analysis/ServiceAnalysis/CodeStarNotifications/Properties/AssemblyInfo.cs
index 29402bb19991..4b1d7544fa09 100644
--- a/sdk/code-analysis/ServiceAnalysis/CodeStarNotifications/Properties/AssemblyInfo.cs
+++ b/sdk/code-analysis/ServiceAnalysis/CodeStarNotifications/Properties/AssemblyInfo.cs
@@ -28,5 +28,5 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.300.84")]
\ No newline at end of file
+[assembly: AssemblyVersion("4.0")]
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/code-analysis/ServiceAnalysis/CodeStarconnections/Properties/AssemblyInfo.cs b/sdk/code-analysis/ServiceAnalysis/CodeStarconnections/Properties/AssemblyInfo.cs
index 5ed6d29f3f38..3217a926b1b5 100644
--- a/sdk/code-analysis/ServiceAnalysis/CodeStarconnections/Properties/AssemblyInfo.cs
+++ b/sdk/code-analysis/ServiceAnalysis/CodeStarconnections/Properties/AssemblyInfo.cs
@@ -28,5 +28,5 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.305.29")]
\ No newline at end of file
+[assembly: AssemblyVersion("4.0")]
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/code-analysis/ServiceAnalysis/CognitoIdentity/Properties/AssemblyInfo.cs b/sdk/code-analysis/ServiceAnalysis/CognitoIdentity/Properties/AssemblyInfo.cs
index ef1f7d8f6212..8af4857579c1 100644
--- a/sdk/code-analysis/ServiceAnalysis/CognitoIdentity/Properties/AssemblyInfo.cs
+++ b/sdk/code-analysis/ServiceAnalysis/CognitoIdentity/Properties/AssemblyInfo.cs
@@ -28,5 +28,5 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.300.84")]
\ No newline at end of file
+[assembly: AssemblyVersion("4.0")]
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/code-analysis/ServiceAnalysis/CognitoIdentityProvider/Properties/AssemblyInfo.cs b/sdk/code-analysis/ServiceAnalysis/CognitoIdentityProvider/Properties/AssemblyInfo.cs
index 27d65da73388..4898c875870a 100644
--- a/sdk/code-analysis/ServiceAnalysis/CognitoIdentityProvider/Properties/AssemblyInfo.cs
+++ b/sdk/code-analysis/ServiceAnalysis/CognitoIdentityProvider/Properties/AssemblyInfo.cs
@@ -28,5 +28,5 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.304.1")]
\ No newline at end of file
+[assembly: AssemblyVersion("4.0")]
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/code-analysis/ServiceAnalysis/CognitoSync/Properties/AssemblyInfo.cs b/sdk/code-analysis/ServiceAnalysis/CognitoSync/Properties/AssemblyInfo.cs
index a6a70e4b83bd..7a610c41d0d2 100644
--- a/sdk/code-analysis/ServiceAnalysis/CognitoSync/Properties/AssemblyInfo.cs
+++ b/sdk/code-analysis/ServiceAnalysis/CognitoSync/Properties/AssemblyInfo.cs
@@ -28,5 +28,5 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.300.84")]
\ No newline at end of file
+[assembly: AssemblyVersion("4.0")]
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/code-analysis/ServiceAnalysis/Comprehend/Properties/AssemblyInfo.cs b/sdk/code-analysis/ServiceAnalysis/Comprehend/Properties/AssemblyInfo.cs
index 680fcbb60b41..b28e37e1d9f4 100644
--- a/sdk/code-analysis/ServiceAnalysis/Comprehend/Properties/AssemblyInfo.cs
+++ b/sdk/code-analysis/ServiceAnalysis/Comprehend/Properties/AssemblyInfo.cs
@@ -28,5 +28,5 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.300.84")]
\ No newline at end of file
+[assembly: AssemblyVersion("4.0")]
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/code-analysis/ServiceAnalysis/ComprehendMedical/Properties/AssemblyInfo.cs b/sdk/code-analysis/ServiceAnalysis/ComprehendMedical/Properties/AssemblyInfo.cs
index bb07dfaed1e7..34f93acfb307 100644
--- a/sdk/code-analysis/ServiceAnalysis/ComprehendMedical/Properties/AssemblyInfo.cs
+++ b/sdk/code-analysis/ServiceAnalysis/ComprehendMedical/Properties/AssemblyInfo.cs
@@ -28,5 +28,5 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.300.84")]
\ No newline at end of file
+[assembly: AssemblyVersion("4.0")]
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/code-analysis/ServiceAnalysis/ComputeOptimizer/Properties/AssemblyInfo.cs b/sdk/code-analysis/ServiceAnalysis/ComputeOptimizer/Properties/AssemblyInfo.cs
index ab9178d7fca6..cd40f6fd4bea 100644
--- a/sdk/code-analysis/ServiceAnalysis/ComputeOptimizer/Properties/AssemblyInfo.cs
+++ b/sdk/code-analysis/ServiceAnalysis/ComputeOptimizer/Properties/AssemblyInfo.cs
@@ -28,5 +28,5 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.302.20")]
\ No newline at end of file
+[assembly: AssemblyVersion("4.0")]
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/code-analysis/ServiceAnalysis/ConfigService/Properties/AssemblyInfo.cs b/sdk/code-analysis/ServiceAnalysis/ConfigService/Properties/AssemblyInfo.cs
index d661b2866dae..904940581cc1 100644
--- a/sdk/code-analysis/ServiceAnalysis/ConfigService/Properties/AssemblyInfo.cs
+++ b/sdk/code-analysis/ServiceAnalysis/ConfigService/Properties/AssemblyInfo.cs
@@ -28,5 +28,5 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.302.56")]
\ No newline at end of file
+[assembly: AssemblyVersion("4.0")]
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/code-analysis/ServiceAnalysis/Connect/Properties/AssemblyInfo.cs b/sdk/code-analysis/ServiceAnalysis/Connect/Properties/AssemblyInfo.cs
index a2ee27ff34e4..ae252e82c4c1 100644
--- a/sdk/code-analysis/ServiceAnalysis/Connect/Properties/AssemblyInfo.cs
+++ b/sdk/code-analysis/ServiceAnalysis/Connect/Properties/AssemblyInfo.cs
@@ -28,5 +28,5 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.316.11")]
\ No newline at end of file
+[assembly: AssemblyVersion("4.0")]
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/code-analysis/ServiceAnalysis/ConnectCampaignService/Properties/AssemblyInfo.cs b/sdk/code-analysis/ServiceAnalysis/ConnectCampaignService/Properties/AssemblyInfo.cs
index 3f0c176ff2bf..2c4ac13ba79b 100644
--- a/sdk/code-analysis/ServiceAnalysis/ConnectCampaignService/Properties/AssemblyInfo.cs
+++ b/sdk/code-analysis/ServiceAnalysis/ConnectCampaignService/Properties/AssemblyInfo.cs
@@ -28,5 +28,5 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.302.1")]
\ No newline at end of file
+[assembly: AssemblyVersion("4.0")]
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/code-analysis/ServiceAnalysis/ConnectCases/Properties/AssemblyInfo.cs b/sdk/code-analysis/ServiceAnalysis/ConnectCases/Properties/AssemblyInfo.cs
index cc35624c64c7..c559883a4cb1 100644
--- a/sdk/code-analysis/ServiceAnalysis/ConnectCases/Properties/AssemblyInfo.cs
+++ b/sdk/code-analysis/ServiceAnalysis/ConnectCases/Properties/AssemblyInfo.cs
@@ -28,5 +28,5 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.303.0")]
\ No newline at end of file
+[assembly: AssemblyVersion("4.0")]
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/code-analysis/ServiceAnalysis/ConnectContactLens/Properties/AssemblyInfo.cs b/sdk/code-analysis/ServiceAnalysis/ConnectContactLens/Properties/AssemblyInfo.cs
index 5793433cba4b..d2eec9199398 100644
--- a/sdk/code-analysis/ServiceAnalysis/ConnectContactLens/Properties/AssemblyInfo.cs
+++ b/sdk/code-analysis/ServiceAnalysis/ConnectContactLens/Properties/AssemblyInfo.cs
@@ -28,5 +28,5 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.300.84")]
\ No newline at end of file
+[assembly: AssemblyVersion("4.0")]
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/code-analysis/ServiceAnalysis/ConnectParticipant/Properties/AssemblyInfo.cs b/sdk/code-analysis/ServiceAnalysis/ConnectParticipant/Properties/AssemblyInfo.cs
index b16911a862ee..31fb1cb3875c 100644
--- a/sdk/code-analysis/ServiceAnalysis/ConnectParticipant/Properties/AssemblyInfo.cs
+++ b/sdk/code-analysis/ServiceAnalysis/ConnectParticipant/Properties/AssemblyInfo.cs
@@ -28,5 +28,5 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.301.49")]
\ No newline at end of file
+[assembly: AssemblyVersion("4.0")]
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/code-analysis/ServiceAnalysis/ConnectWisdomService/Properties/AssemblyInfo.cs b/sdk/code-analysis/ServiceAnalysis/ConnectWisdomService/Properties/AssemblyInfo.cs
index 4aab3ff037f2..014448237723 100644
--- a/sdk/code-analysis/ServiceAnalysis/ConnectWisdomService/Properties/AssemblyInfo.cs
+++ b/sdk/code-analysis/ServiceAnalysis/ConnectWisdomService/Properties/AssemblyInfo.cs
@@ -28,5 +28,5 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.302.51")]
\ No newline at end of file
+[assembly: AssemblyVersion("4.0")]
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/code-analysis/ServiceAnalysis/ControlCatalog/Properties/AssemblyInfo.cs b/sdk/code-analysis/ServiceAnalysis/ControlCatalog/Properties/AssemblyInfo.cs
index 456e374ccd19..a024e83815be 100644
--- a/sdk/code-analysis/ServiceAnalysis/ControlCatalog/Properties/AssemblyInfo.cs
+++ b/sdk/code-analysis/ServiceAnalysis/ControlCatalog/Properties/AssemblyInfo.cs
@@ -28,5 +28,5 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.300.13")]
\ No newline at end of file
+[assembly: AssemblyVersion("4.0")]
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/code-analysis/ServiceAnalysis/ControlTower/Properties/AssemblyInfo.cs b/sdk/code-analysis/ServiceAnalysis/ControlTower/Properties/AssemblyInfo.cs
index 4de465effe55..c05960f9edd3 100644
--- a/sdk/code-analysis/ServiceAnalysis/ControlTower/Properties/AssemblyInfo.cs
+++ b/sdk/code-analysis/ServiceAnalysis/ControlTower/Properties/AssemblyInfo.cs
@@ -28,5 +28,5 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.304.34")]
\ No newline at end of file
+[assembly: AssemblyVersion("4.0")]
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/code-analysis/ServiceAnalysis/CostAndUsageReport/Properties/AssemblyInfo.cs b/sdk/code-analysis/ServiceAnalysis/CostAndUsageReport/Properties/AssemblyInfo.cs
index 21da2468c0d2..b3ada4a0d3fc 100644
--- a/sdk/code-analysis/ServiceAnalysis/CostAndUsageReport/Properties/AssemblyInfo.cs
+++ b/sdk/code-analysis/ServiceAnalysis/CostAndUsageReport/Properties/AssemblyInfo.cs
@@ -28,5 +28,5 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.301.84")]
\ No newline at end of file
+[assembly: AssemblyVersion("4.0")]
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/code-analysis/ServiceAnalysis/CostExplorer/Properties/AssemblyInfo.cs b/sdk/code-analysis/ServiceAnalysis/CostExplorer/Properties/AssemblyInfo.cs
index 79ebf58a5531..2cce4c1240dc 100644
--- a/sdk/code-analysis/ServiceAnalysis/CostExplorer/Properties/AssemblyInfo.cs
+++ b/sdk/code-analysis/ServiceAnalysis/CostExplorer/Properties/AssemblyInfo.cs
@@ -28,5 +28,5 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.303.4")]
\ No newline at end of file
+[assembly: AssemblyVersion("4.0")]
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/code-analysis/ServiceAnalysis/CostOptimizationHub/Properties/AssemblyInfo.cs b/sdk/code-analysis/ServiceAnalysis/CostOptimizationHub/Properties/AssemblyInfo.cs
index eac6ba34842b..c92f843bc8f3 100644
--- a/sdk/code-analysis/ServiceAnalysis/CostOptimizationHub/Properties/AssemblyInfo.cs
+++ b/sdk/code-analysis/ServiceAnalysis/CostOptimizationHub/Properties/AssemblyInfo.cs
@@ -28,5 +28,5 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.301.36")]
\ No newline at end of file
+[assembly: AssemblyVersion("4.0")]
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/code-analysis/ServiceAnalysis/CustomerProfiles/Properties/AssemblyInfo.cs b/sdk/code-analysis/ServiceAnalysis/CustomerProfiles/Properties/AssemblyInfo.cs
index 5e4f923f3b6c..3ed4972e2a37 100644
--- a/sdk/code-analysis/ServiceAnalysis/CustomerProfiles/Properties/AssemblyInfo.cs
+++ b/sdk/code-analysis/ServiceAnalysis/CustomerProfiles/Properties/AssemblyInfo.cs
@@ -28,5 +28,5 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.301.73")]
\ No newline at end of file
+[assembly: AssemblyVersion("4.0")]
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/code-analysis/ServiceAnalysis/DAX/Properties/AssemblyInfo.cs b/sdk/code-analysis/ServiceAnalysis/DAX/Properties/AssemblyInfo.cs
index 799beb1fcaed..ce63c864fec2 100644
--- a/sdk/code-analysis/ServiceAnalysis/DAX/Properties/AssemblyInfo.cs
+++ b/sdk/code-analysis/ServiceAnalysis/DAX/Properties/AssemblyInfo.cs
@@ -28,5 +28,5 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.300.84")]
\ No newline at end of file
+[assembly: AssemblyVersion("4.0")]
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/code-analysis/ServiceAnalysis/DLM/Properties/AssemblyInfo.cs b/sdk/code-analysis/ServiceAnalysis/DLM/Properties/AssemblyInfo.cs
index 4120283d04c4..87ed134c4d34 100644
--- a/sdk/code-analysis/ServiceAnalysis/DLM/Properties/AssemblyInfo.cs
+++ b/sdk/code-analysis/ServiceAnalysis/DLM/Properties/AssemblyInfo.cs
@@ -28,5 +28,5 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.301.80")]
\ No newline at end of file
+[assembly: AssemblyVersion("4.0")]
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/code-analysis/ServiceAnalysis/DataExchange/Properties/AssemblyInfo.cs b/sdk/code-analysis/ServiceAnalysis/DataExchange/Properties/AssemblyInfo.cs
index 2f56a259da3a..82a405ce1959 100644
--- a/sdk/code-analysis/ServiceAnalysis/DataExchange/Properties/AssemblyInfo.cs
+++ b/sdk/code-analysis/ServiceAnalysis/DataExchange/Properties/AssemblyInfo.cs
@@ -28,5 +28,5 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.301.83")]
\ No newline at end of file
+[assembly: AssemblyVersion("4.0")]
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/code-analysis/ServiceAnalysis/DataPipeline/Properties/AssemblyInfo.cs b/sdk/code-analysis/ServiceAnalysis/DataPipeline/Properties/AssemblyInfo.cs
index be912d961405..e2280ff29cf3 100644
--- a/sdk/code-analysis/ServiceAnalysis/DataPipeline/Properties/AssemblyInfo.cs
+++ b/sdk/code-analysis/ServiceAnalysis/DataPipeline/Properties/AssemblyInfo.cs
@@ -28,5 +28,5 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.300.84")]
\ No newline at end of file
+[assembly: AssemblyVersion("4.0")]
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/code-analysis/ServiceAnalysis/DataSync/Properties/AssemblyInfo.cs b/sdk/code-analysis/ServiceAnalysis/DataSync/Properties/AssemblyInfo.cs
index 19c44ee548bb..7251d7d4a97f 100644
--- a/sdk/code-analysis/ServiceAnalysis/DataSync/Properties/AssemblyInfo.cs
+++ b/sdk/code-analysis/ServiceAnalysis/DataSync/Properties/AssemblyInfo.cs
@@ -28,5 +28,5 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.302.3")]
\ No newline at end of file
+[assembly: AssemblyVersion("4.0")]
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/code-analysis/ServiceAnalysis/DataZone/Properties/AssemblyInfo.cs b/sdk/code-analysis/ServiceAnalysis/DataZone/Properties/AssemblyInfo.cs
index 26ec2003ba43..84c00c8d992f 100644
--- a/sdk/code-analysis/ServiceAnalysis/DataZone/Properties/AssemblyInfo.cs
+++ b/sdk/code-analysis/ServiceAnalysis/DataZone/Properties/AssemblyInfo.cs
@@ -28,5 +28,5 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.303.16")]
\ No newline at end of file
+[assembly: AssemblyVersion("4.0")]
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/code-analysis/ServiceAnalysis/DatabaseMigrationService/Properties/AssemblyInfo.cs b/sdk/code-analysis/ServiceAnalysis/DatabaseMigrationService/Properties/AssemblyInfo.cs
index 085d1c286b27..982de72548ae 100644
--- a/sdk/code-analysis/ServiceAnalysis/DatabaseMigrationService/Properties/AssemblyInfo.cs
+++ b/sdk/code-analysis/ServiceAnalysis/DatabaseMigrationService/Properties/AssemblyInfo.cs
@@ -28,5 +28,5 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.301.83")]
\ No newline at end of file
+[assembly: AssemblyVersion("4.0")]
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/code-analysis/ServiceAnalysis/Deadline/Properties/AssemblyInfo.cs b/sdk/code-analysis/ServiceAnalysis/Deadline/Properties/AssemblyInfo.cs
index 45207409b4c1..75ccca96068e 100644
--- a/sdk/code-analysis/ServiceAnalysis/Deadline/Properties/AssemblyInfo.cs
+++ b/sdk/code-analysis/ServiceAnalysis/Deadline/Properties/AssemblyInfo.cs
@@ -28,5 +28,5 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.300.18")]
\ No newline at end of file
+[assembly: AssemblyVersion("4.0")]
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/code-analysis/ServiceAnalysis/Detective/Properties/AssemblyInfo.cs b/sdk/code-analysis/ServiceAnalysis/Detective/Properties/AssemblyInfo.cs
index e17a9b6def2a..7ed39c30140e 100644
--- a/sdk/code-analysis/ServiceAnalysis/Detective/Properties/AssemblyInfo.cs
+++ b/sdk/code-analysis/ServiceAnalysis/Detective/Properties/AssemblyInfo.cs
@@ -28,5 +28,5 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.301.76")]
\ No newline at end of file
+[assembly: AssemblyVersion("4.0")]
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/code-analysis/ServiceAnalysis/DevOpsGuru/Properties/AssemblyInfo.cs b/sdk/code-analysis/ServiceAnalysis/DevOpsGuru/Properties/AssemblyInfo.cs
index a98a2c15b482..e0632b4f12d5 100644
--- a/sdk/code-analysis/ServiceAnalysis/DevOpsGuru/Properties/AssemblyInfo.cs
+++ b/sdk/code-analysis/ServiceAnalysis/DevOpsGuru/Properties/AssemblyInfo.cs
@@ -28,5 +28,5 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.300.84")]
\ No newline at end of file
+[assembly: AssemblyVersion("4.0")]
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/code-analysis/ServiceAnalysis/DeviceFarm/Properties/AssemblyInfo.cs b/sdk/code-analysis/ServiceAnalysis/DeviceFarm/Properties/AssemblyInfo.cs
index 27d7bfa133b0..3ce818501564 100644
--- a/sdk/code-analysis/ServiceAnalysis/DeviceFarm/Properties/AssemblyInfo.cs
+++ b/sdk/code-analysis/ServiceAnalysis/DeviceFarm/Properties/AssemblyInfo.cs
@@ -28,5 +28,5 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.300.84")]
\ No newline at end of file
+[assembly: AssemblyVersion("4.0")]
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/code-analysis/ServiceAnalysis/DirectConnect/Properties/AssemblyInfo.cs b/sdk/code-analysis/ServiceAnalysis/DirectConnect/Properties/AssemblyInfo.cs
index 0e76a97680e1..a9c63e4ca229 100644
--- a/sdk/code-analysis/ServiceAnalysis/DirectConnect/Properties/AssemblyInfo.cs
+++ b/sdk/code-analysis/ServiceAnalysis/DirectConnect/Properties/AssemblyInfo.cs
@@ -28,5 +28,5 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.300.84")]
\ No newline at end of file
+[assembly: AssemblyVersion("4.0")]
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/code-analysis/ServiceAnalysis/DirectoryService/Properties/AssemblyInfo.cs b/sdk/code-analysis/ServiceAnalysis/DirectoryService/Properties/AssemblyInfo.cs
index e31f9706ef7e..6a78fa193bd0 100644
--- a/sdk/code-analysis/ServiceAnalysis/DirectoryService/Properties/AssemblyInfo.cs
+++ b/sdk/code-analysis/ServiceAnalysis/DirectoryService/Properties/AssemblyInfo.cs
@@ -28,5 +28,5 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.300.84")]
\ No newline at end of file
+[assembly: AssemblyVersion("4.0")]
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/code-analysis/ServiceAnalysis/DocDB/Properties/AssemblyInfo.cs b/sdk/code-analysis/ServiceAnalysis/DocDB/Properties/AssemblyInfo.cs
index 7a726ebea447..617686847405 100644
--- a/sdk/code-analysis/ServiceAnalysis/DocDB/Properties/AssemblyInfo.cs
+++ b/sdk/code-analysis/ServiceAnalysis/DocDB/Properties/AssemblyInfo.cs
@@ -28,5 +28,5 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.303.16")]
\ No newline at end of file
+[assembly: AssemblyVersion("4.0")]
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/code-analysis/ServiceAnalysis/DocDBElastic/Properties/AssemblyInfo.cs b/sdk/code-analysis/ServiceAnalysis/DocDBElastic/Properties/AssemblyInfo.cs
index baddec5a786a..eefbbc11b599 100644
--- a/sdk/code-analysis/ServiceAnalysis/DocDBElastic/Properties/AssemblyInfo.cs
+++ b/sdk/code-analysis/ServiceAnalysis/DocDBElastic/Properties/AssemblyInfo.cs
@@ -28,5 +28,5 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.301.30")]
\ No newline at end of file
+[assembly: AssemblyVersion("4.0")]
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/code-analysis/ServiceAnalysis/Drs/Properties/AssemblyInfo.cs b/sdk/code-analysis/ServiceAnalysis/Drs/Properties/AssemblyInfo.cs
index 0ceeda532dfa..ac02b0ef68f3 100644
--- a/sdk/code-analysis/ServiceAnalysis/Drs/Properties/AssemblyInfo.cs
+++ b/sdk/code-analysis/ServiceAnalysis/Drs/Properties/AssemblyInfo.cs
@@ -28,5 +28,5 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.304.7")]
\ No newline at end of file
+[assembly: AssemblyVersion("4.0")]
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/code-analysis/ServiceAnalysis/DynamoDBv2/Properties/AssemblyInfo.cs b/sdk/code-analysis/ServiceAnalysis/DynamoDBv2/Properties/AssemblyInfo.cs
index 7f200a7bdc01..02501bad8995 100644
--- a/sdk/code-analysis/ServiceAnalysis/DynamoDBv2/Properties/AssemblyInfo.cs
+++ b/sdk/code-analysis/ServiceAnalysis/DynamoDBv2/Properties/AssemblyInfo.cs
@@ -28,5 +28,5 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.302.25")]
\ No newline at end of file
+[assembly: AssemblyVersion("4.0")]
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/code-analysis/ServiceAnalysis/EBS/Properties/AssemblyInfo.cs b/sdk/code-analysis/ServiceAnalysis/EBS/Properties/AssemblyInfo.cs
index 705ba6290799..5406d8fa04e4 100644
--- a/sdk/code-analysis/ServiceAnalysis/EBS/Properties/AssemblyInfo.cs
+++ b/sdk/code-analysis/ServiceAnalysis/EBS/Properties/AssemblyInfo.cs
@@ -28,5 +28,5 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.300.84")]
\ No newline at end of file
+[assembly: AssemblyVersion("4.0")]
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/code-analysis/ServiceAnalysis/EC2/Properties/AssemblyInfo.cs b/sdk/code-analysis/ServiceAnalysis/EC2/Properties/AssemblyInfo.cs
index 2b461ca5da83..90b26d309cb1 100644
--- a/sdk/code-analysis/ServiceAnalysis/EC2/Properties/AssemblyInfo.cs
+++ b/sdk/code-analysis/ServiceAnalysis/EC2/Properties/AssemblyInfo.cs
@@ -28,5 +28,5 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.325.3")]
\ No newline at end of file
+[assembly: AssemblyVersion("4.0")]
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/code-analysis/ServiceAnalysis/EC2InstanceConnect/Properties/AssemblyInfo.cs b/sdk/code-analysis/ServiceAnalysis/EC2InstanceConnect/Properties/AssemblyInfo.cs
index a111af0460cf..5e93196abc9a 100644
--- a/sdk/code-analysis/ServiceAnalysis/EC2InstanceConnect/Properties/AssemblyInfo.cs
+++ b/sdk/code-analysis/ServiceAnalysis/EC2InstanceConnect/Properties/AssemblyInfo.cs
@@ -28,5 +28,5 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.301.27")]
\ No newline at end of file
+[assembly: AssemblyVersion("4.0")]
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/code-analysis/ServiceAnalysis/ECR/Properties/AssemblyInfo.cs b/sdk/code-analysis/ServiceAnalysis/ECR/Properties/AssemblyInfo.cs
index 15f9ff1b9540..586f805d81b4 100644
--- a/sdk/code-analysis/ServiceAnalysis/ECR/Properties/AssemblyInfo.cs
+++ b/sdk/code-analysis/ServiceAnalysis/ECR/Properties/AssemblyInfo.cs
@@ -28,5 +28,5 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.301.79")]
\ No newline at end of file
+[assembly: AssemblyVersion("4.0")]
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/code-analysis/ServiceAnalysis/ECRPublic/Properties/AssemblyInfo.cs b/sdk/code-analysis/ServiceAnalysis/ECRPublic/Properties/AssemblyInfo.cs
index b8c234f779fe..478f6050de9f 100644
--- a/sdk/code-analysis/ServiceAnalysis/ECRPublic/Properties/AssemblyInfo.cs
+++ b/sdk/code-analysis/ServiceAnalysis/ECRPublic/Properties/AssemblyInfo.cs
@@ -28,5 +28,5 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.300.84")]
\ No newline at end of file
+[assembly: AssemblyVersion("4.0")]
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/code-analysis/ServiceAnalysis/ECS/Properties/AssemblyInfo.cs b/sdk/code-analysis/ServiceAnalysis/ECS/Properties/AssemblyInfo.cs
index 778cd93fb8bc..042e9318feea 100644
--- a/sdk/code-analysis/ServiceAnalysis/ECS/Properties/AssemblyInfo.cs
+++ b/sdk/code-analysis/ServiceAnalysis/ECS/Properties/AssemblyInfo.cs
@@ -28,5 +28,5 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.305.46")]
\ No newline at end of file
+[assembly: AssemblyVersion("4.0")]
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/code-analysis/ServiceAnalysis/EKS/Properties/AssemblyInfo.cs b/sdk/code-analysis/ServiceAnalysis/EKS/Properties/AssemblyInfo.cs
index ee896a3314cf..4bbc3c64a5ad 100644
--- a/sdk/code-analysis/ServiceAnalysis/EKS/Properties/AssemblyInfo.cs
+++ b/sdk/code-analysis/ServiceAnalysis/EKS/Properties/AssemblyInfo.cs
@@ -28,5 +28,5 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.305.20")]
\ No newline at end of file
+[assembly: AssemblyVersion("4.0")]
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/code-analysis/ServiceAnalysis/EKSAuth/Properties/AssemblyInfo.cs b/sdk/code-analysis/ServiceAnalysis/EKSAuth/Properties/AssemblyInfo.cs
index fa0913b68ce8..44f4b5deb9d9 100644
--- a/sdk/code-analysis/ServiceAnalysis/EKSAuth/Properties/AssemblyInfo.cs
+++ b/sdk/code-analysis/ServiceAnalysis/EKSAuth/Properties/AssemblyInfo.cs
@@ -28,5 +28,5 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.300.76")]
\ No newline at end of file
+[assembly: AssemblyVersion("4.0")]
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/code-analysis/ServiceAnalysis/EMRContainers/Properties/AssemblyInfo.cs b/sdk/code-analysis/ServiceAnalysis/EMRContainers/Properties/AssemblyInfo.cs
index f92b945b4c31..d4846d5b879c 100644
--- a/sdk/code-analysis/ServiceAnalysis/EMRContainers/Properties/AssemblyInfo.cs
+++ b/sdk/code-analysis/ServiceAnalysis/EMRContainers/Properties/AssemblyInfo.cs
@@ -28,5 +28,5 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.303.3")]
\ No newline at end of file
+[assembly: AssemblyVersion("4.0")]
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/code-analysis/ServiceAnalysis/EMRServerless/Properties/AssemblyInfo.cs b/sdk/code-analysis/ServiceAnalysis/EMRServerless/Properties/AssemblyInfo.cs
index 5874cfbfb8c1..1f715f0a8886 100644
--- a/sdk/code-analysis/ServiceAnalysis/EMRServerless/Properties/AssemblyInfo.cs
+++ b/sdk/code-analysis/ServiceAnalysis/EMRServerless/Properties/AssemblyInfo.cs
@@ -28,5 +28,5 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.302.7")]
\ No newline at end of file
+[assembly: AssemblyVersion("4.0")]
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/code-analysis/ServiceAnalysis/ElastiCache/Properties/AssemblyInfo.cs b/sdk/code-analysis/ServiceAnalysis/ElastiCache/Properties/AssemblyInfo.cs
index 0007bd4c6cdb..60344d92a258 100644
--- a/sdk/code-analysis/ServiceAnalysis/ElastiCache/Properties/AssemblyInfo.cs
+++ b/sdk/code-analysis/ServiceAnalysis/ElastiCache/Properties/AssemblyInfo.cs
@@ -28,5 +28,5 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.302.21")]
\ No newline at end of file
+[assembly: AssemblyVersion("4.0")]
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/code-analysis/ServiceAnalysis/ElasticBeanstalk/Properties/AssemblyInfo.cs b/sdk/code-analysis/ServiceAnalysis/ElasticBeanstalk/Properties/AssemblyInfo.cs
index f26157932bfb..63093278dff3 100644
--- a/sdk/code-analysis/ServiceAnalysis/ElasticBeanstalk/Properties/AssemblyInfo.cs
+++ b/sdk/code-analysis/ServiceAnalysis/ElasticBeanstalk/Properties/AssemblyInfo.cs
@@ -28,5 +28,5 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.300.84")]
\ No newline at end of file
+[assembly: AssemblyVersion("4.0")]
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/code-analysis/ServiceAnalysis/ElasticFileSystem/Properties/AssemblyInfo.cs b/sdk/code-analysis/ServiceAnalysis/ElasticFileSystem/Properties/AssemblyInfo.cs
index 189487e4c3f4..06b4ce5e4a7c 100644
--- a/sdk/code-analysis/ServiceAnalysis/ElasticFileSystem/Properties/AssemblyInfo.cs
+++ b/sdk/code-analysis/ServiceAnalysis/ElasticFileSystem/Properties/AssemblyInfo.cs
@@ -28,5 +28,5 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.302.75")]
\ No newline at end of file
+[assembly: AssemblyVersion("4.0")]
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/code-analysis/ServiceAnalysis/ElasticInference/Properties/AssemblyInfo.cs b/sdk/code-analysis/ServiceAnalysis/ElasticInference/Properties/AssemblyInfo.cs
index 478acecf04a0..99d56b7477cf 100644
--- a/sdk/code-analysis/ServiceAnalysis/ElasticInference/Properties/AssemblyInfo.cs
+++ b/sdk/code-analysis/ServiceAnalysis/ElasticInference/Properties/AssemblyInfo.cs
@@ -28,5 +28,5 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.300.84")]
\ No newline at end of file
+[assembly: AssemblyVersion("4.0")]
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/code-analysis/ServiceAnalysis/ElasticLoadBalancing/Properties/AssemblyInfo.cs b/sdk/code-analysis/ServiceAnalysis/ElasticLoadBalancing/Properties/AssemblyInfo.cs
index 8a81c85fbc23..d4272c36ebbd 100644
--- a/sdk/code-analysis/ServiceAnalysis/ElasticLoadBalancing/Properties/AssemblyInfo.cs
+++ b/sdk/code-analysis/ServiceAnalysis/ElasticLoadBalancing/Properties/AssemblyInfo.cs
@@ -28,5 +28,5 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.300.84")]
\ No newline at end of file
+[assembly: AssemblyVersion("4.0")]
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/code-analysis/ServiceAnalysis/ElasticLoadBalancingV2/Properties/AssemblyInfo.cs b/sdk/code-analysis/ServiceAnalysis/ElasticLoadBalancingV2/Properties/AssemblyInfo.cs
index 297659bae3d3..a89a16064b45 100644
--- a/sdk/code-analysis/ServiceAnalysis/ElasticLoadBalancingV2/Properties/AssemblyInfo.cs
+++ b/sdk/code-analysis/ServiceAnalysis/ElasticLoadBalancingV2/Properties/AssemblyInfo.cs
@@ -28,5 +28,5 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.302.40")]
\ No newline at end of file
+[assembly: AssemblyVersion("4.0")]
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/code-analysis/ServiceAnalysis/ElasticMapReduce/Properties/AssemblyInfo.cs b/sdk/code-analysis/ServiceAnalysis/ElasticMapReduce/Properties/AssemblyInfo.cs
index 4193bad46c43..1096c6496a27 100644
--- a/sdk/code-analysis/ServiceAnalysis/ElasticMapReduce/Properties/AssemblyInfo.cs
+++ b/sdk/code-analysis/ServiceAnalysis/ElasticMapReduce/Properties/AssemblyInfo.cs
@@ -28,5 +28,5 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.304.32")]
\ No newline at end of file
+[assembly: AssemblyVersion("4.0")]
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/code-analysis/ServiceAnalysis/ElasticTranscoder/Properties/AssemblyInfo.cs b/sdk/code-analysis/ServiceAnalysis/ElasticTranscoder/Properties/AssemblyInfo.cs
index 5f4f1fda4e64..fc94884736d2 100644
--- a/sdk/code-analysis/ServiceAnalysis/ElasticTranscoder/Properties/AssemblyInfo.cs
+++ b/sdk/code-analysis/ServiceAnalysis/ElasticTranscoder/Properties/AssemblyInfo.cs
@@ -28,5 +28,5 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.300.84")]
\ No newline at end of file
+[assembly: AssemblyVersion("4.0")]
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/code-analysis/ServiceAnalysis/Elasticsearch/Properties/AssemblyInfo.cs b/sdk/code-analysis/ServiceAnalysis/Elasticsearch/Properties/AssemblyInfo.cs
index d41e4c2f25dc..167ced998df4 100644
--- a/sdk/code-analysis/ServiceAnalysis/Elasticsearch/Properties/AssemblyInfo.cs
+++ b/sdk/code-analysis/ServiceAnalysis/Elasticsearch/Properties/AssemblyInfo.cs
@@ -28,5 +28,5 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.302.38")]
\ No newline at end of file
+[assembly: AssemblyVersion("4.0")]
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/code-analysis/ServiceAnalysis/EntityResolution/Properties/AssemblyInfo.cs b/sdk/code-analysis/ServiceAnalysis/EntityResolution/Properties/AssemblyInfo.cs
index 789f193d57cb..2dd0473dd987 100644
--- a/sdk/code-analysis/ServiceAnalysis/EntityResolution/Properties/AssemblyInfo.cs
+++ b/sdk/code-analysis/ServiceAnalysis/EntityResolution/Properties/AssemblyInfo.cs
@@ -28,5 +28,5 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.302.3")]
\ No newline at end of file
+[assembly: AssemblyVersion("4.0")]
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/code-analysis/ServiceAnalysis/EventBridge/Properties/AssemblyInfo.cs b/sdk/code-analysis/ServiceAnalysis/EventBridge/Properties/AssemblyInfo.cs
index 8cca629271e0..59f0627a891f 100644
--- a/sdk/code-analysis/ServiceAnalysis/EventBridge/Properties/AssemblyInfo.cs
+++ b/sdk/code-analysis/ServiceAnalysis/EventBridge/Properties/AssemblyInfo.cs
@@ -28,5 +28,5 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.302.50")]
\ No newline at end of file
+[assembly: AssemblyVersion("4.0")]
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/code-analysis/ServiceAnalysis/FIS/Properties/AssemblyInfo.cs b/sdk/code-analysis/ServiceAnalysis/FIS/Properties/AssemblyInfo.cs
index 56f9a28095a8..af67f496f077 100644
--- a/sdk/code-analysis/ServiceAnalysis/FIS/Properties/AssemblyInfo.cs
+++ b/sdk/code-analysis/ServiceAnalysis/FIS/Properties/AssemblyInfo.cs
@@ -28,5 +28,5 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.302.27")]
\ No newline at end of file
+[assembly: AssemblyVersion("4.0")]
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/code-analysis/ServiceAnalysis/FMS/Properties/AssemblyInfo.cs b/sdk/code-analysis/ServiceAnalysis/FMS/Properties/AssemblyInfo.cs
index 446b5a856a1d..aa7ed9753f7d 100644
--- a/sdk/code-analysis/ServiceAnalysis/FMS/Properties/AssemblyInfo.cs
+++ b/sdk/code-analysis/ServiceAnalysis/FMS/Properties/AssemblyInfo.cs
@@ -28,5 +28,5 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.302.0")]
\ No newline at end of file
+[assembly: AssemblyVersion("4.0")]
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/code-analysis/ServiceAnalysis/FSx/Properties/AssemblyInfo.cs b/sdk/code-analysis/ServiceAnalysis/FSx/Properties/AssemblyInfo.cs
index fcd279996e66..4aee68d7eb57 100644
--- a/sdk/code-analysis/ServiceAnalysis/FSx/Properties/AssemblyInfo.cs
+++ b/sdk/code-analysis/ServiceAnalysis/FSx/Properties/AssemblyInfo.cs
@@ -28,5 +28,5 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.304.30")]
\ No newline at end of file
+[assembly: AssemblyVersion("4.0")]
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/code-analysis/ServiceAnalysis/FinSpaceData/Properties/AssemblyInfo.cs b/sdk/code-analysis/ServiceAnalysis/FinSpaceData/Properties/AssemblyInfo.cs
index 622cd6b4de0b..04d9c1805aec 100644
--- a/sdk/code-analysis/ServiceAnalysis/FinSpaceData/Properties/AssemblyInfo.cs
+++ b/sdk/code-analysis/ServiceAnalysis/FinSpaceData/Properties/AssemblyInfo.cs
@@ -28,5 +28,5 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.301.81")]
\ No newline at end of file
+[assembly: AssemblyVersion("4.0")]
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/code-analysis/ServiceAnalysis/Finspace/Properties/AssemblyInfo.cs b/sdk/code-analysis/ServiceAnalysis/Finspace/Properties/AssemblyInfo.cs
index 9a29c1647d78..d5e5a8b88531 100644
--- a/sdk/code-analysis/ServiceAnalysis/Finspace/Properties/AssemblyInfo.cs
+++ b/sdk/code-analysis/ServiceAnalysis/Finspace/Properties/AssemblyInfo.cs
@@ -28,5 +28,5 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.306.22")]
\ No newline at end of file
+[assembly: AssemblyVersion("4.0")]
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/code-analysis/ServiceAnalysis/ForecastQueryService/Properties/AssemblyInfo.cs b/sdk/code-analysis/ServiceAnalysis/ForecastQueryService/Properties/AssemblyInfo.cs
index 8da5e0e2e2e9..d496e3d2c545 100644
--- a/sdk/code-analysis/ServiceAnalysis/ForecastQueryService/Properties/AssemblyInfo.cs
+++ b/sdk/code-analysis/ServiceAnalysis/ForecastQueryService/Properties/AssemblyInfo.cs
@@ -28,5 +28,5 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.300.84")]
\ No newline at end of file
+[assembly: AssemblyVersion("4.0")]
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/code-analysis/ServiceAnalysis/ForecastService/Properties/AssemblyInfo.cs b/sdk/code-analysis/ServiceAnalysis/ForecastService/Properties/AssemblyInfo.cs
index e9529efe08a8..46fc5170999d 100644
--- a/sdk/code-analysis/ServiceAnalysis/ForecastService/Properties/AssemblyInfo.cs
+++ b/sdk/code-analysis/ServiceAnalysis/ForecastService/Properties/AssemblyInfo.cs
@@ -28,5 +28,5 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.300.84")]
\ No newline at end of file
+[assembly: AssemblyVersion("4.0")]
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/code-analysis/ServiceAnalysis/FraudDetector/Properties/AssemblyInfo.cs b/sdk/code-analysis/ServiceAnalysis/FraudDetector/Properties/AssemblyInfo.cs
index b1ba07b50722..471d3fbcebc7 100644
--- a/sdk/code-analysis/ServiceAnalysis/FraudDetector/Properties/AssemblyInfo.cs
+++ b/sdk/code-analysis/ServiceAnalysis/FraudDetector/Properties/AssemblyInfo.cs
@@ -28,5 +28,5 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.300.84")]
\ No newline at end of file
+[assembly: AssemblyVersion("4.0")]
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/code-analysis/ServiceAnalysis/FreeTier/Properties/AssemblyInfo.cs b/sdk/code-analysis/ServiceAnalysis/FreeTier/Properties/AssemblyInfo.cs
index f9c2e1bd95ca..bc8e656e4996 100644
--- a/sdk/code-analysis/ServiceAnalysis/FreeTier/Properties/AssemblyInfo.cs
+++ b/sdk/code-analysis/ServiceAnalysis/FreeTier/Properties/AssemblyInfo.cs
@@ -28,5 +28,5 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.300.76")]
\ No newline at end of file
+[assembly: AssemblyVersion("4.0")]
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/code-analysis/ServiceAnalysis/GameLift/Properties/AssemblyInfo.cs b/sdk/code-analysis/ServiceAnalysis/GameLift/Properties/AssemblyInfo.cs
index f26c70c7824a..97748f0ff0fd 100644
--- a/sdk/code-analysis/ServiceAnalysis/GameLift/Properties/AssemblyInfo.cs
+++ b/sdk/code-analysis/ServiceAnalysis/GameLift/Properties/AssemblyInfo.cs
@@ -28,5 +28,5 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.302.3")]
\ No newline at end of file
+[assembly: AssemblyVersion("4.0")]
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/code-analysis/ServiceAnalysis/Glacier/Properties/AssemblyInfo.cs b/sdk/code-analysis/ServiceAnalysis/Glacier/Properties/AssemblyInfo.cs
index 2e48f64a3871..bf68933b5fdf 100644
--- a/sdk/code-analysis/ServiceAnalysis/Glacier/Properties/AssemblyInfo.cs
+++ b/sdk/code-analysis/ServiceAnalysis/Glacier/Properties/AssemblyInfo.cs
@@ -28,5 +28,5 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.300.84")]
\ No newline at end of file
+[assembly: AssemblyVersion("4.0")]
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/code-analysis/ServiceAnalysis/GlobalAccelerator/Properties/AssemblyInfo.cs b/sdk/code-analysis/ServiceAnalysis/GlobalAccelerator/Properties/AssemblyInfo.cs
index c46810d9aae7..88dbab50ac89 100644
--- a/sdk/code-analysis/ServiceAnalysis/GlobalAccelerator/Properties/AssemblyInfo.cs
+++ b/sdk/code-analysis/ServiceAnalysis/GlobalAccelerator/Properties/AssemblyInfo.cs
@@ -28,5 +28,5 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.301.23")]
\ No newline at end of file
+[assembly: AssemblyVersion("4.0")]
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/code-analysis/ServiceAnalysis/Glue/Properties/AssemblyInfo.cs b/sdk/code-analysis/ServiceAnalysis/Glue/Properties/AssemblyInfo.cs
index b65f5f038561..f058ef2462d1 100644
--- a/sdk/code-analysis/ServiceAnalysis/Glue/Properties/AssemblyInfo.cs
+++ b/sdk/code-analysis/ServiceAnalysis/Glue/Properties/AssemblyInfo.cs
@@ -28,5 +28,5 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.310.6")]
\ No newline at end of file
+[assembly: AssemblyVersion("4.0")]
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/code-analysis/ServiceAnalysis/GlueDataBrew/Properties/AssemblyInfo.cs b/sdk/code-analysis/ServiceAnalysis/GlueDataBrew/Properties/AssemblyInfo.cs
index 9253fc7ce480..6e94866ac0c8 100644
--- a/sdk/code-analysis/ServiceAnalysis/GlueDataBrew/Properties/AssemblyInfo.cs
+++ b/sdk/code-analysis/ServiceAnalysis/GlueDataBrew/Properties/AssemblyInfo.cs
@@ -28,5 +28,5 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.300.84")]
\ No newline at end of file
+[assembly: AssemblyVersion("4.0")]
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/code-analysis/ServiceAnalysis/Greengrass/Properties/AssemblyInfo.cs b/sdk/code-analysis/ServiceAnalysis/Greengrass/Properties/AssemblyInfo.cs
index cb9c123c2941..fbc14283e1c1 100644
--- a/sdk/code-analysis/ServiceAnalysis/Greengrass/Properties/AssemblyInfo.cs
+++ b/sdk/code-analysis/ServiceAnalysis/Greengrass/Properties/AssemblyInfo.cs
@@ -28,5 +28,5 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.300.84")]
\ No newline at end of file
+[assembly: AssemblyVersion("4.0")]
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/code-analysis/ServiceAnalysis/GreengrassV2/Properties/AssemblyInfo.cs b/sdk/code-analysis/ServiceAnalysis/GreengrassV2/Properties/AssemblyInfo.cs
index 803be2aa3a87..b9469a1aa195 100644
--- a/sdk/code-analysis/ServiceAnalysis/GreengrassV2/Properties/AssemblyInfo.cs
+++ b/sdk/code-analysis/ServiceAnalysis/GreengrassV2/Properties/AssemblyInfo.cs
@@ -28,5 +28,5 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.300.84")]
\ No newline at end of file
+[assembly: AssemblyVersion("4.0")]
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/code-analysis/ServiceAnalysis/GroundStation/Properties/AssemblyInfo.cs b/sdk/code-analysis/ServiceAnalysis/GroundStation/Properties/AssemblyInfo.cs
index c97d0d1f05f0..4c9fb1fd7db4 100644
--- a/sdk/code-analysis/ServiceAnalysis/GroundStation/Properties/AssemblyInfo.cs
+++ b/sdk/code-analysis/ServiceAnalysis/GroundStation/Properties/AssemblyInfo.cs
@@ -28,5 +28,5 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.301.16")]
\ No newline at end of file
+[assembly: AssemblyVersion("4.0")]
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/code-analysis/ServiceAnalysis/GuardDuty/Properties/AssemblyInfo.cs b/sdk/code-analysis/ServiceAnalysis/GuardDuty/Properties/AssemblyInfo.cs
index 078540055499..3b959039fdfe 100644
--- a/sdk/code-analysis/ServiceAnalysis/GuardDuty/Properties/AssemblyInfo.cs
+++ b/sdk/code-analysis/ServiceAnalysis/GuardDuty/Properties/AssemblyInfo.cs
@@ -28,5 +28,5 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.306.7")]
\ No newline at end of file
+[assembly: AssemblyVersion("4.0")]
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/code-analysis/ServiceAnalysis/HealthLake/Properties/AssemblyInfo.cs b/sdk/code-analysis/ServiceAnalysis/HealthLake/Properties/AssemblyInfo.cs
index a039abc10c51..cc9b806d9cda 100644
--- a/sdk/code-analysis/ServiceAnalysis/HealthLake/Properties/AssemblyInfo.cs
+++ b/sdk/code-analysis/ServiceAnalysis/HealthLake/Properties/AssemblyInfo.cs
@@ -28,5 +28,5 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.302.10")]
\ No newline at end of file
+[assembly: AssemblyVersion("4.0")]
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/code-analysis/ServiceAnalysis/Honeycode/Properties/AssemblyInfo.cs b/sdk/code-analysis/ServiceAnalysis/Honeycode/Properties/AssemblyInfo.cs
index 6a7671937319..5e2e660ed70d 100644
--- a/sdk/code-analysis/ServiceAnalysis/Honeycode/Properties/AssemblyInfo.cs
+++ b/sdk/code-analysis/ServiceAnalysis/Honeycode/Properties/AssemblyInfo.cs
@@ -28,5 +28,5 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.300.84")]
\ No newline at end of file
+[assembly: AssemblyVersion("4.0")]
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/code-analysis/ServiceAnalysis/IAMRolesAnywhere/Properties/AssemblyInfo.cs b/sdk/code-analysis/ServiceAnalysis/IAMRolesAnywhere/Properties/AssemblyInfo.cs
index 49410291416a..d240a01cd3c8 100644
--- a/sdk/code-analysis/ServiceAnalysis/IAMRolesAnywhere/Properties/AssemblyInfo.cs
+++ b/sdk/code-analysis/ServiceAnalysis/IAMRolesAnywhere/Properties/AssemblyInfo.cs
@@ -28,5 +28,5 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.303.7")]
\ No newline at end of file
+[assembly: AssemblyVersion("4.0")]
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/code-analysis/ServiceAnalysis/IVS/Properties/AssemblyInfo.cs b/sdk/code-analysis/ServiceAnalysis/IVS/Properties/AssemblyInfo.cs
index 2a8145955c01..ffe7adbb055f 100644
--- a/sdk/code-analysis/ServiceAnalysis/IVS/Properties/AssemblyInfo.cs
+++ b/sdk/code-analysis/ServiceAnalysis/IVS/Properties/AssemblyInfo.cs
@@ -28,5 +28,5 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.304.2")]
\ No newline at end of file
+[assembly: AssemblyVersion("4.0")]
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/code-analysis/ServiceAnalysis/IVSRealTime/Properties/AssemblyInfo.cs b/sdk/code-analysis/ServiceAnalysis/IVSRealTime/Properties/AssemblyInfo.cs
index cbb6147c37b7..39d6ac8ea7c2 100644
--- a/sdk/code-analysis/ServiceAnalysis/IVSRealTime/Properties/AssemblyInfo.cs
+++ b/sdk/code-analysis/ServiceAnalysis/IVSRealTime/Properties/AssemblyInfo.cs
@@ -28,5 +28,5 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.303.2")]
\ No newline at end of file
+[assembly: AssemblyVersion("4.0")]
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/code-analysis/ServiceAnalysis/IdentityManagement/Properties/AssemblyInfo.cs b/sdk/code-analysis/ServiceAnalysis/IdentityManagement/Properties/AssemblyInfo.cs
index cd97c331e238..2c8acf661e57 100644
--- a/sdk/code-analysis/ServiceAnalysis/IdentityManagement/Properties/AssemblyInfo.cs
+++ b/sdk/code-analysis/ServiceAnalysis/IdentityManagement/Properties/AssemblyInfo.cs
@@ -28,5 +28,5 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.301.10")]
\ No newline at end of file
+[assembly: AssemblyVersion("4.0")]
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/code-analysis/ServiceAnalysis/IdentityStore/Properties/AssemblyInfo.cs b/sdk/code-analysis/ServiceAnalysis/IdentityStore/Properties/AssemblyInfo.cs
index 2ad4bbb1bc8f..16612dd09973 100644
--- a/sdk/code-analysis/ServiceAnalysis/IdentityStore/Properties/AssemblyInfo.cs
+++ b/sdk/code-analysis/ServiceAnalysis/IdentityStore/Properties/AssemblyInfo.cs
@@ -28,5 +28,5 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.300.84")]
\ No newline at end of file
+[assembly: AssemblyVersion("4.0")]
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/code-analysis/ServiceAnalysis/Imagebuilder/Properties/AssemblyInfo.cs b/sdk/code-analysis/ServiceAnalysis/Imagebuilder/Properties/AssemblyInfo.cs
index 33822227c258..39e28097d4f3 100644
--- a/sdk/code-analysis/ServiceAnalysis/Imagebuilder/Properties/AssemblyInfo.cs
+++ b/sdk/code-analysis/ServiceAnalysis/Imagebuilder/Properties/AssemblyInfo.cs
@@ -28,5 +28,5 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.303.30")]
\ No newline at end of file
+[assembly: AssemblyVersion("4.0")]
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/code-analysis/ServiceAnalysis/ImportExport/Properties/AssemblyInfo.cs b/sdk/code-analysis/ServiceAnalysis/ImportExport/Properties/AssemblyInfo.cs
index 9e5806993c9b..f7e19064f774 100644
--- a/sdk/code-analysis/ServiceAnalysis/ImportExport/Properties/AssemblyInfo.cs
+++ b/sdk/code-analysis/ServiceAnalysis/ImportExport/Properties/AssemblyInfo.cs
@@ -28,5 +28,5 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.300.84")]
\ No newline at end of file
+[assembly: AssemblyVersion("4.0")]
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/code-analysis/ServiceAnalysis/Inspector/Properties/AssemblyInfo.cs b/sdk/code-analysis/ServiceAnalysis/Inspector/Properties/AssemblyInfo.cs
index 383dc5277771..95fcc12b7225 100644
--- a/sdk/code-analysis/ServiceAnalysis/Inspector/Properties/AssemblyInfo.cs
+++ b/sdk/code-analysis/ServiceAnalysis/Inspector/Properties/AssemblyInfo.cs
@@ -28,5 +28,5 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.300.84")]
\ No newline at end of file
+[assembly: AssemblyVersion("4.0")]
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/code-analysis/ServiceAnalysis/Inspector2/Properties/AssemblyInfo.cs b/sdk/code-analysis/ServiceAnalysis/Inspector2/Properties/AssemblyInfo.cs
index 640d2180b976..9f018a11fd3a 100644
--- a/sdk/code-analysis/ServiceAnalysis/Inspector2/Properties/AssemblyInfo.cs
+++ b/sdk/code-analysis/ServiceAnalysis/Inspector2/Properties/AssemblyInfo.cs
@@ -28,5 +28,5 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.303.0")]
\ No newline at end of file
+[assembly: AssemblyVersion("4.0")]
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/code-analysis/ServiceAnalysis/InspectorScan/Properties/AssemblyInfo.cs b/sdk/code-analysis/ServiceAnalysis/InspectorScan/Properties/AssemblyInfo.cs
index 668c8bff16bf..9feeb90fa1dd 100644
--- a/sdk/code-analysis/ServiceAnalysis/InspectorScan/Properties/AssemblyInfo.cs
+++ b/sdk/code-analysis/ServiceAnalysis/InspectorScan/Properties/AssemblyInfo.cs
@@ -28,5 +28,5 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.300.77")]
\ No newline at end of file
+[assembly: AssemblyVersion("4.0")]
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/code-analysis/ServiceAnalysis/InternetMonitor/Properties/AssemblyInfo.cs b/sdk/code-analysis/ServiceAnalysis/InternetMonitor/Properties/AssemblyInfo.cs
index 8df444220f18..45e28bceca91 100644
--- a/sdk/code-analysis/ServiceAnalysis/InternetMonitor/Properties/AssemblyInfo.cs
+++ b/sdk/code-analysis/ServiceAnalysis/InternetMonitor/Properties/AssemblyInfo.cs
@@ -28,5 +28,5 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.304.6")]
\ No newline at end of file
+[assembly: AssemblyVersion("4.0")]
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/code-analysis/ServiceAnalysis/IoT/Properties/AssemblyInfo.cs b/sdk/code-analysis/ServiceAnalysis/IoT/Properties/AssemblyInfo.cs
index 01619cfd0733..a17a18868d37 100644
--- a/sdk/code-analysis/ServiceAnalysis/IoT/Properties/AssemblyInfo.cs
+++ b/sdk/code-analysis/ServiceAnalysis/IoT/Properties/AssemblyInfo.cs
@@ -28,5 +28,5 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.307.31")]
\ No newline at end of file
+[assembly: AssemblyVersion("4.0")]
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/code-analysis/ServiceAnalysis/IoT1ClickDevicesService/Properties/AssemblyInfo.cs b/sdk/code-analysis/ServiceAnalysis/IoT1ClickDevicesService/Properties/AssemblyInfo.cs
index a1f36bd59538..9b10b88ba651 100644
--- a/sdk/code-analysis/ServiceAnalysis/IoT1ClickDevicesService/Properties/AssemblyInfo.cs
+++ b/sdk/code-analysis/ServiceAnalysis/IoT1ClickDevicesService/Properties/AssemblyInfo.cs
@@ -28,5 +28,5 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.300.84")]
\ No newline at end of file
+[assembly: AssemblyVersion("4.0")]
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/code-analysis/ServiceAnalysis/IoT1ClickProjects/Properties/AssemblyInfo.cs b/sdk/code-analysis/ServiceAnalysis/IoT1ClickProjects/Properties/AssemblyInfo.cs
index 66967e2650d5..ce55af1b2cfc 100644
--- a/sdk/code-analysis/ServiceAnalysis/IoT1ClickProjects/Properties/AssemblyInfo.cs
+++ b/sdk/code-analysis/ServiceAnalysis/IoT1ClickProjects/Properties/AssemblyInfo.cs
@@ -28,5 +28,5 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.300.84")]
\ No newline at end of file
+[assembly: AssemblyVersion("4.0")]
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/code-analysis/ServiceAnalysis/IoTAnalytics/Properties/AssemblyInfo.cs b/sdk/code-analysis/ServiceAnalysis/IoTAnalytics/Properties/AssemblyInfo.cs
index 0c48bc6a7c7c..84cded5e4cd8 100644
--- a/sdk/code-analysis/ServiceAnalysis/IoTAnalytics/Properties/AssemblyInfo.cs
+++ b/sdk/code-analysis/ServiceAnalysis/IoTAnalytics/Properties/AssemblyInfo.cs
@@ -28,5 +28,5 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.300.84")]
\ No newline at end of file
+[assembly: AssemblyVersion("4.0")]
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/code-analysis/ServiceAnalysis/IoTDeviceAdvisor/Properties/AssemblyInfo.cs b/sdk/code-analysis/ServiceAnalysis/IoTDeviceAdvisor/Properties/AssemblyInfo.cs
index c338573df969..8c82aeea3777 100644
--- a/sdk/code-analysis/ServiceAnalysis/IoTDeviceAdvisor/Properties/AssemblyInfo.cs
+++ b/sdk/code-analysis/ServiceAnalysis/IoTDeviceAdvisor/Properties/AssemblyInfo.cs
@@ -28,5 +28,5 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.300.84")]
\ No newline at end of file
+[assembly: AssemblyVersion("4.0")]
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/code-analysis/ServiceAnalysis/IoTEvents/Properties/AssemblyInfo.cs b/sdk/code-analysis/ServiceAnalysis/IoTEvents/Properties/AssemblyInfo.cs
index ce0eb3a64d9e..f0768fad769a 100644
--- a/sdk/code-analysis/ServiceAnalysis/IoTEvents/Properties/AssemblyInfo.cs
+++ b/sdk/code-analysis/ServiceAnalysis/IoTEvents/Properties/AssemblyInfo.cs
@@ -28,5 +28,5 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.301.32")]
\ No newline at end of file
+[assembly: AssemblyVersion("4.0")]
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/code-analysis/ServiceAnalysis/IoTEventsData/Properties/AssemblyInfo.cs b/sdk/code-analysis/ServiceAnalysis/IoTEventsData/Properties/AssemblyInfo.cs
index 2c64d7646a4b..ac39093f05ce 100644
--- a/sdk/code-analysis/ServiceAnalysis/IoTEventsData/Properties/AssemblyInfo.cs
+++ b/sdk/code-analysis/ServiceAnalysis/IoTEventsData/Properties/AssemblyInfo.cs
@@ -28,5 +28,5 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.300.84")]
\ No newline at end of file
+[assembly: AssemblyVersion("4.0")]
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/code-analysis/ServiceAnalysis/IoTFleetHub/Properties/AssemblyInfo.cs b/sdk/code-analysis/ServiceAnalysis/IoTFleetHub/Properties/AssemblyInfo.cs
index b22042fba544..3236bdfa6c6a 100644
--- a/sdk/code-analysis/ServiceAnalysis/IoTFleetHub/Properties/AssemblyInfo.cs
+++ b/sdk/code-analysis/ServiceAnalysis/IoTFleetHub/Properties/AssemblyInfo.cs
@@ -28,5 +28,5 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.300.85")]
\ No newline at end of file
+[assembly: AssemblyVersion("4.0")]
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/code-analysis/ServiceAnalysis/IoTFleetWise/Properties/AssemblyInfo.cs b/sdk/code-analysis/ServiceAnalysis/IoTFleetWise/Properties/AssemblyInfo.cs
index 48d7f3e346b7..9369f8c0662a 100644
--- a/sdk/code-analysis/ServiceAnalysis/IoTFleetWise/Properties/AssemblyInfo.cs
+++ b/sdk/code-analysis/ServiceAnalysis/IoTFleetWise/Properties/AssemblyInfo.cs
@@ -28,5 +28,5 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.303.47")]
\ No newline at end of file
+[assembly: AssemblyVersion("4.0")]
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/code-analysis/ServiceAnalysis/IoTJobsDataPlane/Properties/AssemblyInfo.cs b/sdk/code-analysis/ServiceAnalysis/IoTJobsDataPlane/Properties/AssemblyInfo.cs
index 101045397449..33aa5419dae0 100644
--- a/sdk/code-analysis/ServiceAnalysis/IoTJobsDataPlane/Properties/AssemblyInfo.cs
+++ b/sdk/code-analysis/ServiceAnalysis/IoTJobsDataPlane/Properties/AssemblyInfo.cs
@@ -28,5 +28,5 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.300.84")]
\ No newline at end of file
+[assembly: AssemblyVersion("4.0")]
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/code-analysis/ServiceAnalysis/IoTSecureTunneling/Properties/AssemblyInfo.cs b/sdk/code-analysis/ServiceAnalysis/IoTSecureTunneling/Properties/AssemblyInfo.cs
index 6416bcc35faa..3fb7ecf1e1f8 100644
--- a/sdk/code-analysis/ServiceAnalysis/IoTSecureTunneling/Properties/AssemblyInfo.cs
+++ b/sdk/code-analysis/ServiceAnalysis/IoTSecureTunneling/Properties/AssemblyInfo.cs
@@ -28,5 +28,5 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.300.84")]
\ No newline at end of file
+[assembly: AssemblyVersion("4.0")]
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/code-analysis/ServiceAnalysis/IoTSiteWise/Properties/AssemblyInfo.cs b/sdk/code-analysis/ServiceAnalysis/IoTSiteWise/Properties/AssemblyInfo.cs
index 337e325b89b0..c61fb7e92d1e 100644
--- a/sdk/code-analysis/ServiceAnalysis/IoTSiteWise/Properties/AssemblyInfo.cs
+++ b/sdk/code-analysis/ServiceAnalysis/IoTSiteWise/Properties/AssemblyInfo.cs
@@ -28,5 +28,5 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.301.77")]
\ No newline at end of file
+[assembly: AssemblyVersion("4.0")]
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/code-analysis/ServiceAnalysis/IoTThingsGraph/Properties/AssemblyInfo.cs b/sdk/code-analysis/ServiceAnalysis/IoTThingsGraph/Properties/AssemblyInfo.cs
index 5e7950345f75..54a90d1b7dc6 100644
--- a/sdk/code-analysis/ServiceAnalysis/IoTThingsGraph/Properties/AssemblyInfo.cs
+++ b/sdk/code-analysis/ServiceAnalysis/IoTThingsGraph/Properties/AssemblyInfo.cs
@@ -28,5 +28,5 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.300.84")]
\ No newline at end of file
+[assembly: AssemblyVersion("4.0")]
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/code-analysis/ServiceAnalysis/IoTTwinMaker/Properties/AssemblyInfo.cs b/sdk/code-analysis/ServiceAnalysis/IoTTwinMaker/Properties/AssemblyInfo.cs
index 0608c1de6a40..ffcd84e2f179 100644
--- a/sdk/code-analysis/ServiceAnalysis/IoTTwinMaker/Properties/AssemblyInfo.cs
+++ b/sdk/code-analysis/ServiceAnalysis/IoTTwinMaker/Properties/AssemblyInfo.cs
@@ -28,5 +28,5 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.301.77")]
\ No newline at end of file
+[assembly: AssemblyVersion("4.0")]
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/code-analysis/ServiceAnalysis/IoTWireless/Properties/AssemblyInfo.cs b/sdk/code-analysis/ServiceAnalysis/IoTWireless/Properties/AssemblyInfo.cs
index 374bc505cb79..feed8314b9fd 100644
--- a/sdk/code-analysis/ServiceAnalysis/IoTWireless/Properties/AssemblyInfo.cs
+++ b/sdk/code-analysis/ServiceAnalysis/IoTWireless/Properties/AssemblyInfo.cs
@@ -28,5 +28,5 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.302.9")]
\ No newline at end of file
+[assembly: AssemblyVersion("4.0")]
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/code-analysis/ServiceAnalysis/IotData/Properties/AssemblyInfo.cs b/sdk/code-analysis/ServiceAnalysis/IotData/Properties/AssemblyInfo.cs
index ebf4d35ea1f6..862832adbb37 100644
--- a/sdk/code-analysis/ServiceAnalysis/IotData/Properties/AssemblyInfo.cs
+++ b/sdk/code-analysis/ServiceAnalysis/IotData/Properties/AssemblyInfo.cs
@@ -28,5 +28,5 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.300.84")]
\ No newline at end of file
+[assembly: AssemblyVersion("4.0")]
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/code-analysis/ServiceAnalysis/Ivschat/Properties/AssemblyInfo.cs b/sdk/code-analysis/ServiceAnalysis/Ivschat/Properties/AssemblyInfo.cs
index fe94b652c670..ea6d76d4b39f 100644
--- a/sdk/code-analysis/ServiceAnalysis/Ivschat/Properties/AssemblyInfo.cs
+++ b/sdk/code-analysis/ServiceAnalysis/Ivschat/Properties/AssemblyInfo.cs
@@ -28,5 +28,5 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.301.79")]
\ No newline at end of file
+[assembly: AssemblyVersion("4.0")]
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/code-analysis/ServiceAnalysis/Kafka/Properties/AssemblyInfo.cs b/sdk/code-analysis/ServiceAnalysis/Kafka/Properties/AssemblyInfo.cs
index 8b72d4090d1d..705a4c4d15c4 100644
--- a/sdk/code-analysis/ServiceAnalysis/Kafka/Properties/AssemblyInfo.cs
+++ b/sdk/code-analysis/ServiceAnalysis/Kafka/Properties/AssemblyInfo.cs
@@ -28,5 +28,5 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.302.29")]
\ No newline at end of file
+[assembly: AssemblyVersion("4.0")]
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/code-analysis/ServiceAnalysis/KafkaConnect/Properties/AssemblyInfo.cs b/sdk/code-analysis/ServiceAnalysis/KafkaConnect/Properties/AssemblyInfo.cs
index 98b8c7cd6c4b..e244c53d9435 100644
--- a/sdk/code-analysis/ServiceAnalysis/KafkaConnect/Properties/AssemblyInfo.cs
+++ b/sdk/code-analysis/ServiceAnalysis/KafkaConnect/Properties/AssemblyInfo.cs
@@ -28,5 +28,5 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.301.32")]
\ No newline at end of file
+[assembly: AssemblyVersion("4.0")]
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/code-analysis/ServiceAnalysis/Kendra/Properties/AssemblyInfo.cs b/sdk/code-analysis/ServiceAnalysis/Kendra/Properties/AssemblyInfo.cs
index 30362070675a..a7d5d9e0148a 100644
--- a/sdk/code-analysis/ServiceAnalysis/Kendra/Properties/AssemblyInfo.cs
+++ b/sdk/code-analysis/ServiceAnalysis/Kendra/Properties/AssemblyInfo.cs
@@ -28,5 +28,5 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.301.24")]
\ No newline at end of file
+[assembly: AssemblyVersion("4.0")]
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/code-analysis/ServiceAnalysis/KendraRanking/Properties/AssemblyInfo.cs b/sdk/code-analysis/ServiceAnalysis/KendraRanking/Properties/AssemblyInfo.cs
index bc0262c71048..1a8549235dc8 100644
--- a/sdk/code-analysis/ServiceAnalysis/KendraRanking/Properties/AssemblyInfo.cs
+++ b/sdk/code-analysis/ServiceAnalysis/KendraRanking/Properties/AssemblyInfo.cs
@@ -28,5 +28,5 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.300.84")]
\ No newline at end of file
+[assembly: AssemblyVersion("4.0")]
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/code-analysis/ServiceAnalysis/KeyManagementService/Properties/AssemblyInfo.cs b/sdk/code-analysis/ServiceAnalysis/KeyManagementService/Properties/AssemblyInfo.cs
index 929bb61af253..d1ffe05cea20 100644
--- a/sdk/code-analysis/ServiceAnalysis/KeyManagementService/Properties/AssemblyInfo.cs
+++ b/sdk/code-analysis/ServiceAnalysis/KeyManagementService/Properties/AssemblyInfo.cs
@@ -28,5 +28,5 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.302.10")]
\ No newline at end of file
+[assembly: AssemblyVersion("4.0")]
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/code-analysis/ServiceAnalysis/Keyspaces/Properties/AssemblyInfo.cs b/sdk/code-analysis/ServiceAnalysis/Keyspaces/Properties/AssemblyInfo.cs
index 9badf632ab37..0da042edb6ea 100644
--- a/sdk/code-analysis/ServiceAnalysis/Keyspaces/Properties/AssemblyInfo.cs
+++ b/sdk/code-analysis/ServiceAnalysis/Keyspaces/Properties/AssemblyInfo.cs
@@ -28,5 +28,5 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.301.48")]
\ No newline at end of file
+[assembly: AssemblyVersion("4.0")]
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/code-analysis/ServiceAnalysis/Kinesis/Properties/AssemblyInfo.cs b/sdk/code-analysis/ServiceAnalysis/Kinesis/Properties/AssemblyInfo.cs
index 5746eaad8143..0edee61f4114 100644
--- a/sdk/code-analysis/ServiceAnalysis/Kinesis/Properties/AssemblyInfo.cs
+++ b/sdk/code-analysis/ServiceAnalysis/Kinesis/Properties/AssemblyInfo.cs
@@ -28,5 +28,5 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.301.77")]
\ No newline at end of file
+[assembly: AssemblyVersion("4.0")]
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/code-analysis/ServiceAnalysis/KinesisAnalytics/Properties/AssemblyInfo.cs b/sdk/code-analysis/ServiceAnalysis/KinesisAnalytics/Properties/AssemblyInfo.cs
index 7260274294f0..bd715727c571 100644
--- a/sdk/code-analysis/ServiceAnalysis/KinesisAnalytics/Properties/AssemblyInfo.cs
+++ b/sdk/code-analysis/ServiceAnalysis/KinesisAnalytics/Properties/AssemblyInfo.cs
@@ -28,5 +28,5 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.300.84")]
\ No newline at end of file
+[assembly: AssemblyVersion("4.0")]
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/code-analysis/ServiceAnalysis/KinesisAnalyticsV2/Properties/AssemblyInfo.cs b/sdk/code-analysis/ServiceAnalysis/KinesisAnalyticsV2/Properties/AssemblyInfo.cs
index aa101e6e40c0..a923c789ec7f 100644
--- a/sdk/code-analysis/ServiceAnalysis/KinesisAnalyticsV2/Properties/AssemblyInfo.cs
+++ b/sdk/code-analysis/ServiceAnalysis/KinesisAnalyticsV2/Properties/AssemblyInfo.cs
@@ -28,5 +28,5 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.302.26")]
\ No newline at end of file
+[assembly: AssemblyVersion("4.0")]
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/code-analysis/ServiceAnalysis/KinesisFirehose/Properties/AssemblyInfo.cs b/sdk/code-analysis/ServiceAnalysis/KinesisFirehose/Properties/AssemblyInfo.cs
index ac692abe8e82..3f47037f7bc8 100644
--- a/sdk/code-analysis/ServiceAnalysis/KinesisFirehose/Properties/AssemblyInfo.cs
+++ b/sdk/code-analysis/ServiceAnalysis/KinesisFirehose/Properties/AssemblyInfo.cs
@@ -28,5 +28,5 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.304.32")]
\ No newline at end of file
+[assembly: AssemblyVersion("4.0")]
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/code-analysis/ServiceAnalysis/KinesisVideo/Properties/AssemblyInfo.cs b/sdk/code-analysis/ServiceAnalysis/KinesisVideo/Properties/AssemblyInfo.cs
index d972e362b483..33e1c1b8cc50 100644
--- a/sdk/code-analysis/ServiceAnalysis/KinesisVideo/Properties/AssemblyInfo.cs
+++ b/sdk/code-analysis/ServiceAnalysis/KinesisVideo/Properties/AssemblyInfo.cs
@@ -28,5 +28,5 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.301.32")]
\ No newline at end of file
+[assembly: AssemblyVersion("4.0")]
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/code-analysis/ServiceAnalysis/KinesisVideoArchivedMedia/Properties/AssemblyInfo.cs b/sdk/code-analysis/ServiceAnalysis/KinesisVideoArchivedMedia/Properties/AssemblyInfo.cs
index 67357f1f46b9..bf283f0a24be 100644
--- a/sdk/code-analysis/ServiceAnalysis/KinesisVideoArchivedMedia/Properties/AssemblyInfo.cs
+++ b/sdk/code-analysis/ServiceAnalysis/KinesisVideoArchivedMedia/Properties/AssemblyInfo.cs
@@ -28,5 +28,5 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.301.56")]
\ No newline at end of file
+[assembly: AssemblyVersion("4.0")]
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/code-analysis/ServiceAnalysis/KinesisVideoMedia/Properties/AssemblyInfo.cs b/sdk/code-analysis/ServiceAnalysis/KinesisVideoMedia/Properties/AssemblyInfo.cs
index 2c05d768543a..ae9d0cbd0d2c 100644
--- a/sdk/code-analysis/ServiceAnalysis/KinesisVideoMedia/Properties/AssemblyInfo.cs
+++ b/sdk/code-analysis/ServiceAnalysis/KinesisVideoMedia/Properties/AssemblyInfo.cs
@@ -28,5 +28,5 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.300.84")]
\ No newline at end of file
+[assembly: AssemblyVersion("4.0")]
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/code-analysis/ServiceAnalysis/KinesisVideoSignalingChannels/Properties/AssemblyInfo.cs b/sdk/code-analysis/ServiceAnalysis/KinesisVideoSignalingChannels/Properties/AssemblyInfo.cs
index 48a95e421e66..ae3621dd194b 100644
--- a/sdk/code-analysis/ServiceAnalysis/KinesisVideoSignalingChannels/Properties/AssemblyInfo.cs
+++ b/sdk/code-analysis/ServiceAnalysis/KinesisVideoSignalingChannels/Properties/AssemblyInfo.cs
@@ -28,5 +28,5 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.300.84")]
\ No newline at end of file
+[assembly: AssemblyVersion("4.0")]
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/code-analysis/ServiceAnalysis/KinesisVideoWebRTCStorage/Properties/AssemblyInfo.cs b/sdk/code-analysis/ServiceAnalysis/KinesisVideoWebRTCStorage/Properties/AssemblyInfo.cs
index 46628c0de67d..0e0fb2679af7 100644
--- a/sdk/code-analysis/ServiceAnalysis/KinesisVideoWebRTCStorage/Properties/AssemblyInfo.cs
+++ b/sdk/code-analysis/ServiceAnalysis/KinesisVideoWebRTCStorage/Properties/AssemblyInfo.cs
@@ -28,5 +28,5 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.300.84")]
\ No newline at end of file
+[assembly: AssemblyVersion("4.0")]
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/code-analysis/ServiceAnalysis/LakeFormation/Properties/AssemblyInfo.cs b/sdk/code-analysis/ServiceAnalysis/LakeFormation/Properties/AssemblyInfo.cs
index 3f89ed042b49..719770217687 100644
--- a/sdk/code-analysis/ServiceAnalysis/LakeFormation/Properties/AssemblyInfo.cs
+++ b/sdk/code-analysis/ServiceAnalysis/LakeFormation/Properties/AssemblyInfo.cs
@@ -28,5 +28,5 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.303.9")]
\ No newline at end of file
+[assembly: AssemblyVersion("4.0")]
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/code-analysis/ServiceAnalysis/Lambda/Properties/AssemblyInfo.cs b/sdk/code-analysis/ServiceAnalysis/Lambda/Properties/AssemblyInfo.cs
index 4346439a4b90..03b21a352b18 100644
--- a/sdk/code-analysis/ServiceAnalysis/Lambda/Properties/AssemblyInfo.cs
+++ b/sdk/code-analysis/ServiceAnalysis/Lambda/Properties/AssemblyInfo.cs
@@ -28,5 +28,5 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.305.16")]
\ No newline at end of file
+[assembly: AssemblyVersion("4.0")]
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/code-analysis/ServiceAnalysis/LaunchWizard/Properties/AssemblyInfo.cs b/sdk/code-analysis/ServiceAnalysis/LaunchWizard/Properties/AssemblyInfo.cs
index 20ab15cf1869..7bfdbd172949 100644
--- a/sdk/code-analysis/ServiceAnalysis/LaunchWizard/Properties/AssemblyInfo.cs
+++ b/sdk/code-analysis/ServiceAnalysis/LaunchWizard/Properties/AssemblyInfo.cs
@@ -28,5 +28,5 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.300.84")]
\ No newline at end of file
+[assembly: AssemblyVersion("4.0")]
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/code-analysis/ServiceAnalysis/Lex/Properties/AssemblyInfo.cs b/sdk/code-analysis/ServiceAnalysis/Lex/Properties/AssemblyInfo.cs
index fafbfb59bf06..80a7f6508ba2 100644
--- a/sdk/code-analysis/ServiceAnalysis/Lex/Properties/AssemblyInfo.cs
+++ b/sdk/code-analysis/ServiceAnalysis/Lex/Properties/AssemblyInfo.cs
@@ -28,5 +28,5 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.300.84")]
\ No newline at end of file
+[assembly: AssemblyVersion("4.0")]
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/code-analysis/ServiceAnalysis/LexModelBuildingService/Properties/AssemblyInfo.cs b/sdk/code-analysis/ServiceAnalysis/LexModelBuildingService/Properties/AssemblyInfo.cs
index 0f5c3f9763c9..d7a085e4c364 100644
--- a/sdk/code-analysis/ServiceAnalysis/LexModelBuildingService/Properties/AssemblyInfo.cs
+++ b/sdk/code-analysis/ServiceAnalysis/LexModelBuildingService/Properties/AssemblyInfo.cs
@@ -28,5 +28,5 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.300.84")]
\ No newline at end of file
+[assembly: AssemblyVersion("4.0")]
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/code-analysis/ServiceAnalysis/LexModelsV2/Properties/AssemblyInfo.cs b/sdk/code-analysis/ServiceAnalysis/LexModelsV2/Properties/AssemblyInfo.cs
index 577e93dd5eb0..e669cfab4f66 100644
--- a/sdk/code-analysis/ServiceAnalysis/LexModelsV2/Properties/AssemblyInfo.cs
+++ b/sdk/code-analysis/ServiceAnalysis/LexModelsV2/Properties/AssemblyInfo.cs
@@ -28,5 +28,5 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.303.30")]
\ No newline at end of file
+[assembly: AssemblyVersion("4.0")]
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/code-analysis/ServiceAnalysis/LexRuntimeV2/Properties/AssemblyInfo.cs b/sdk/code-analysis/ServiceAnalysis/LexRuntimeV2/Properties/AssemblyInfo.cs
index cd02fb8bb389..5b8c0990bd47 100644
--- a/sdk/code-analysis/ServiceAnalysis/LexRuntimeV2/Properties/AssemblyInfo.cs
+++ b/sdk/code-analysis/ServiceAnalysis/LexRuntimeV2/Properties/AssemblyInfo.cs
@@ -28,5 +28,5 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.301.76")]
\ No newline at end of file
+[assembly: AssemblyVersion("4.0")]
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/code-analysis/ServiceAnalysis/LicenseManager/Properties/AssemblyInfo.cs b/sdk/code-analysis/ServiceAnalysis/LicenseManager/Properties/AssemblyInfo.cs
index 06e356cedf0d..94af63c15517 100644
--- a/sdk/code-analysis/ServiceAnalysis/LicenseManager/Properties/AssemblyInfo.cs
+++ b/sdk/code-analysis/ServiceAnalysis/LicenseManager/Properties/AssemblyInfo.cs
@@ -28,5 +28,5 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.300.84")]
\ No newline at end of file
+[assembly: AssemblyVersion("4.0")]
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/code-analysis/ServiceAnalysis/LicenseManagerLinuxSubscriptions/Properties/AssemblyInfo.cs b/sdk/code-analysis/ServiceAnalysis/LicenseManagerLinuxSubscriptions/Properties/AssemblyInfo.cs
index 997880da935a..a9b92eb4b990 100644
--- a/sdk/code-analysis/ServiceAnalysis/LicenseManagerLinuxSubscriptions/Properties/AssemblyInfo.cs
+++ b/sdk/code-analysis/ServiceAnalysis/LicenseManagerLinuxSubscriptions/Properties/AssemblyInfo.cs
@@ -28,5 +28,5 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.300.84")]
\ No newline at end of file
+[assembly: AssemblyVersion("4.0")]
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/code-analysis/ServiceAnalysis/LicenseManagerUserSubscriptions/Properties/AssemblyInfo.cs b/sdk/code-analysis/ServiceAnalysis/LicenseManagerUserSubscriptions/Properties/AssemblyInfo.cs
index 806c392a4293..4a97df09e026 100644
--- a/sdk/code-analysis/ServiceAnalysis/LicenseManagerUserSubscriptions/Properties/AssemblyInfo.cs
+++ b/sdk/code-analysis/ServiceAnalysis/LicenseManagerUserSubscriptions/Properties/AssemblyInfo.cs
@@ -28,5 +28,5 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.300.84")]
\ No newline at end of file
+[assembly: AssemblyVersion("4.0")]
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/code-analysis/ServiceAnalysis/Lightsail/Properties/AssemblyInfo.cs b/sdk/code-analysis/ServiceAnalysis/Lightsail/Properties/AssemblyInfo.cs
index 6b028c18588b..80fc3cdbfa50 100644
--- a/sdk/code-analysis/ServiceAnalysis/Lightsail/Properties/AssemblyInfo.cs
+++ b/sdk/code-analysis/ServiceAnalysis/Lightsail/Properties/AssemblyInfo.cs
@@ -28,5 +28,5 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.304.18")]
\ No newline at end of file
+[assembly: AssemblyVersion("4.0")]
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/code-analysis/ServiceAnalysis/LocationService/Properties/AssemblyInfo.cs b/sdk/code-analysis/ServiceAnalysis/LocationService/Properties/AssemblyInfo.cs
index 1bd80b7071cf..5f5548ee5a36 100644
--- a/sdk/code-analysis/ServiceAnalysis/LocationService/Properties/AssemblyInfo.cs
+++ b/sdk/code-analysis/ServiceAnalysis/LocationService/Properties/AssemblyInfo.cs
@@ -28,5 +28,5 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.304.51")]
\ No newline at end of file
+[assembly: AssemblyVersion("4.0")]
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/code-analysis/ServiceAnalysis/LookoutEquipment/Properties/AssemblyInfo.cs b/sdk/code-analysis/ServiceAnalysis/LookoutEquipment/Properties/AssemblyInfo.cs
index 12c4620992cd..e0bfaae3f570 100644
--- a/sdk/code-analysis/ServiceAnalysis/LookoutEquipment/Properties/AssemblyInfo.cs
+++ b/sdk/code-analysis/ServiceAnalysis/LookoutEquipment/Properties/AssemblyInfo.cs
@@ -28,5 +28,5 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.302.32")]
\ No newline at end of file
+[assembly: AssemblyVersion("4.0")]
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/code-analysis/ServiceAnalysis/LookoutMetrics/Properties/AssemblyInfo.cs b/sdk/code-analysis/ServiceAnalysis/LookoutMetrics/Properties/AssemblyInfo.cs
index f46622c2f93a..df8cfdc62d5d 100644
--- a/sdk/code-analysis/ServiceAnalysis/LookoutMetrics/Properties/AssemblyInfo.cs
+++ b/sdk/code-analysis/ServiceAnalysis/LookoutMetrics/Properties/AssemblyInfo.cs
@@ -28,5 +28,5 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.300.84")]
\ No newline at end of file
+[assembly: AssemblyVersion("4.0")]
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/code-analysis/ServiceAnalysis/LookoutforVision/Properties/AssemblyInfo.cs b/sdk/code-analysis/ServiceAnalysis/LookoutforVision/Properties/AssemblyInfo.cs
index d5eff8e98da8..27503636f741 100644
--- a/sdk/code-analysis/ServiceAnalysis/LookoutforVision/Properties/AssemblyInfo.cs
+++ b/sdk/code-analysis/ServiceAnalysis/LookoutforVision/Properties/AssemblyInfo.cs
@@ -28,5 +28,5 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.300.84")]
\ No newline at end of file
+[assembly: AssemblyVersion("4.0")]
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/code-analysis/ServiceAnalysis/MQ/Properties/AssemblyInfo.cs b/sdk/code-analysis/ServiceAnalysis/MQ/Properties/AssemblyInfo.cs
index 15078a060229..0320b7875c21 100644
--- a/sdk/code-analysis/ServiceAnalysis/MQ/Properties/AssemblyInfo.cs
+++ b/sdk/code-analysis/ServiceAnalysis/MQ/Properties/AssemblyInfo.cs
@@ -28,5 +28,5 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.300.84")]
\ No newline at end of file
+[assembly: AssemblyVersion("4.0")]
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/code-analysis/ServiceAnalysis/MTurk/Properties/AssemblyInfo.cs b/sdk/code-analysis/ServiceAnalysis/MTurk/Properties/AssemblyInfo.cs
index b9667ff22e09..b890956b40f7 100644
--- a/sdk/code-analysis/ServiceAnalysis/MTurk/Properties/AssemblyInfo.cs
+++ b/sdk/code-analysis/ServiceAnalysis/MTurk/Properties/AssemblyInfo.cs
@@ -28,5 +28,5 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.300.84")]
\ No newline at end of file
+[assembly: AssemblyVersion("4.0")]
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/code-analysis/ServiceAnalysis/MWAA/Properties/AssemblyInfo.cs b/sdk/code-analysis/ServiceAnalysis/MWAA/Properties/AssemblyInfo.cs
index e93dc329f947..e48f124734a7 100644
--- a/sdk/code-analysis/ServiceAnalysis/MWAA/Properties/AssemblyInfo.cs
+++ b/sdk/code-analysis/ServiceAnalysis/MWAA/Properties/AssemblyInfo.cs
@@ -28,5 +28,5 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.303.43")]
\ No newline at end of file
+[assembly: AssemblyVersion("4.0")]
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/code-analysis/ServiceAnalysis/MachineLearning/Properties/AssemblyInfo.cs b/sdk/code-analysis/ServiceAnalysis/MachineLearning/Properties/AssemblyInfo.cs
index 0418e8fa0f98..088caef3a430 100644
--- a/sdk/code-analysis/ServiceAnalysis/MachineLearning/Properties/AssemblyInfo.cs
+++ b/sdk/code-analysis/ServiceAnalysis/MachineLearning/Properties/AssemblyInfo.cs
@@ -28,5 +28,5 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.300.84")]
\ No newline at end of file
+[assembly: AssemblyVersion("4.0")]
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/code-analysis/ServiceAnalysis/Macie2/Properties/AssemblyInfo.cs b/sdk/code-analysis/ServiceAnalysis/Macie2/Properties/AssemblyInfo.cs
index de771f1becc1..3e393a1a91af 100644
--- a/sdk/code-analysis/ServiceAnalysis/Macie2/Properties/AssemblyInfo.cs
+++ b/sdk/code-analysis/ServiceAnalysis/Macie2/Properties/AssemblyInfo.cs
@@ -28,5 +28,5 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.302.47")]
\ No newline at end of file
+[assembly: AssemblyVersion("4.0")]
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/code-analysis/ServiceAnalysis/MainframeModernization/Properties/AssemblyInfo.cs b/sdk/code-analysis/ServiceAnalysis/MainframeModernization/Properties/AssemblyInfo.cs
index f14a21a4228d..1347379e2636 100644
--- a/sdk/code-analysis/ServiceAnalysis/MainframeModernization/Properties/AssemblyInfo.cs
+++ b/sdk/code-analysis/ServiceAnalysis/MainframeModernization/Properties/AssemblyInfo.cs
@@ -28,5 +28,5 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.301.9")]
\ No newline at end of file
+[assembly: AssemblyVersion("4.0")]
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/code-analysis/ServiceAnalysis/ManagedBlockchain/Properties/AssemblyInfo.cs b/sdk/code-analysis/ServiceAnalysis/ManagedBlockchain/Properties/AssemblyInfo.cs
index 872c7503b47e..f7bda4c4c35b 100644
--- a/sdk/code-analysis/ServiceAnalysis/ManagedBlockchain/Properties/AssemblyInfo.cs
+++ b/sdk/code-analysis/ServiceAnalysis/ManagedBlockchain/Properties/AssemblyInfo.cs
@@ -28,5 +28,5 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.301.76")]
\ No newline at end of file
+[assembly: AssemblyVersion("4.0")]
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/code-analysis/ServiceAnalysis/ManagedBlockchainQuery/Properties/AssemblyInfo.cs b/sdk/code-analysis/ServiceAnalysis/ManagedBlockchainQuery/Properties/AssemblyInfo.cs
index 49d514e101ee..47d8cdc45e56 100644
--- a/sdk/code-analysis/ServiceAnalysis/ManagedBlockchainQuery/Properties/AssemblyInfo.cs
+++ b/sdk/code-analysis/ServiceAnalysis/ManagedBlockchainQuery/Properties/AssemblyInfo.cs
@@ -28,5 +28,5 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.304.25")]
\ No newline at end of file
+[assembly: AssemblyVersion("4.0")]
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/code-analysis/ServiceAnalysis/ManagedGrafana/Properties/AssemblyInfo.cs b/sdk/code-analysis/ServiceAnalysis/ManagedGrafana/Properties/AssemblyInfo.cs
index 8f18b2820ba9..013ee4d5c91b 100644
--- a/sdk/code-analysis/ServiceAnalysis/ManagedGrafana/Properties/AssemblyInfo.cs
+++ b/sdk/code-analysis/ServiceAnalysis/ManagedGrafana/Properties/AssemblyInfo.cs
@@ -28,5 +28,5 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.301.30")]
\ No newline at end of file
+[assembly: AssemblyVersion("4.0")]
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/code-analysis/ServiceAnalysis/MarketplaceAgreement/Properties/AssemblyInfo.cs b/sdk/code-analysis/ServiceAnalysis/MarketplaceAgreement/Properties/AssemblyInfo.cs
index 95845202b049..3037372e6d9b 100644
--- a/sdk/code-analysis/ServiceAnalysis/MarketplaceAgreement/Properties/AssemblyInfo.cs
+++ b/sdk/code-analysis/ServiceAnalysis/MarketplaceAgreement/Properties/AssemblyInfo.cs
@@ -28,5 +28,5 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.300.72")]
\ No newline at end of file
+[assembly: AssemblyVersion("4.0")]
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/code-analysis/ServiceAnalysis/MarketplaceCatalog/Properties/AssemblyInfo.cs b/sdk/code-analysis/ServiceAnalysis/MarketplaceCatalog/Properties/AssemblyInfo.cs
index fcc6772ff7fb..9d5d690fee8b 100644
--- a/sdk/code-analysis/ServiceAnalysis/MarketplaceCatalog/Properties/AssemblyInfo.cs
+++ b/sdk/code-analysis/ServiceAnalysis/MarketplaceCatalog/Properties/AssemblyInfo.cs
@@ -28,5 +28,5 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.304.19")]
\ No newline at end of file
+[assembly: AssemblyVersion("4.0")]
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/code-analysis/ServiceAnalysis/MarketplaceDeployment/Properties/AssemblyInfo.cs b/sdk/code-analysis/ServiceAnalysis/MarketplaceDeployment/Properties/AssemblyInfo.cs
index 9df48f086e02..44cdf5d51126 100644
--- a/sdk/code-analysis/ServiceAnalysis/MarketplaceDeployment/Properties/AssemblyInfo.cs
+++ b/sdk/code-analysis/ServiceAnalysis/MarketplaceDeployment/Properties/AssemblyInfo.cs
@@ -28,5 +28,5 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.300.72")]
\ No newline at end of file
+[assembly: AssemblyVersion("4.0")]
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/code-analysis/ServiceAnalysis/MarketplaceEntitlementService/Properties/AssemblyInfo.cs b/sdk/code-analysis/ServiceAnalysis/MarketplaceEntitlementService/Properties/AssemblyInfo.cs
index 5c30800296f1..5acc654a4353 100644
--- a/sdk/code-analysis/ServiceAnalysis/MarketplaceEntitlementService/Properties/AssemblyInfo.cs
+++ b/sdk/code-analysis/ServiceAnalysis/MarketplaceEntitlementService/Properties/AssemblyInfo.cs
@@ -28,5 +28,5 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.302.1")]
\ No newline at end of file
+[assembly: AssemblyVersion("4.0")]
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/code-analysis/ServiceAnalysis/MediaConnect/Properties/AssemblyInfo.cs b/sdk/code-analysis/ServiceAnalysis/MediaConnect/Properties/AssemblyInfo.cs
index cd6b48875343..9c54914f7faa 100644
--- a/sdk/code-analysis/ServiceAnalysis/MediaConnect/Properties/AssemblyInfo.cs
+++ b/sdk/code-analysis/ServiceAnalysis/MediaConnect/Properties/AssemblyInfo.cs
@@ -28,5 +28,5 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.301.59")]
\ No newline at end of file
+[assembly: AssemblyVersion("4.0")]
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/code-analysis/ServiceAnalysis/MediaConvert/Properties/AssemblyInfo.cs b/sdk/code-analysis/ServiceAnalysis/MediaConvert/Properties/AssemblyInfo.cs
index f809fc3319d0..52e5e26a1176 100644
--- a/sdk/code-analysis/ServiceAnalysis/MediaConvert/Properties/AssemblyInfo.cs
+++ b/sdk/code-analysis/ServiceAnalysis/MediaConvert/Properties/AssemblyInfo.cs
@@ -28,5 +28,5 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.304.12")]
\ No newline at end of file
+[assembly: AssemblyVersion("4.0")]
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/code-analysis/ServiceAnalysis/MediaLive/Properties/AssemblyInfo.cs b/sdk/code-analysis/ServiceAnalysis/MediaLive/Properties/AssemblyInfo.cs
index 4aefbd501150..9902e8c91fc3 100644
--- a/sdk/code-analysis/ServiceAnalysis/MediaLive/Properties/AssemblyInfo.cs
+++ b/sdk/code-analysis/ServiceAnalysis/MediaLive/Properties/AssemblyInfo.cs
@@ -28,5 +28,5 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.307.10")]
\ No newline at end of file
+[assembly: AssemblyVersion("4.0")]
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/code-analysis/ServiceAnalysis/MediaPackage/Properties/AssemblyInfo.cs b/sdk/code-analysis/ServiceAnalysis/MediaPackage/Properties/AssemblyInfo.cs
index bb5dfe037363..f759889bd5ee 100644
--- a/sdk/code-analysis/ServiceAnalysis/MediaPackage/Properties/AssemblyInfo.cs
+++ b/sdk/code-analysis/ServiceAnalysis/MediaPackage/Properties/AssemblyInfo.cs
@@ -28,5 +28,5 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.301.80")]
\ No newline at end of file
+[assembly: AssemblyVersion("4.0")]
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/code-analysis/ServiceAnalysis/MediaPackageV2/Properties/AssemblyInfo.cs b/sdk/code-analysis/ServiceAnalysis/MediaPackageV2/Properties/AssemblyInfo.cs
index b93a31993ff2..7f5a27fe33c8 100644
--- a/sdk/code-analysis/ServiceAnalysis/MediaPackageV2/Properties/AssemblyInfo.cs
+++ b/sdk/code-analysis/ServiceAnalysis/MediaPackageV2/Properties/AssemblyInfo.cs
@@ -28,5 +28,5 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.302.9")]
\ No newline at end of file
+[assembly: AssemblyVersion("4.0")]
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/code-analysis/ServiceAnalysis/MediaPackageVod/Properties/AssemblyInfo.cs b/sdk/code-analysis/ServiceAnalysis/MediaPackageVod/Properties/AssemblyInfo.cs
index 862fff1a71d2..80ae5692163f 100644
--- a/sdk/code-analysis/ServiceAnalysis/MediaPackageVod/Properties/AssemblyInfo.cs
+++ b/sdk/code-analysis/ServiceAnalysis/MediaPackageVod/Properties/AssemblyInfo.cs
@@ -28,5 +28,5 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.300.84")]
\ No newline at end of file
+[assembly: AssemblyVersion("4.0")]
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/code-analysis/ServiceAnalysis/MediaStore/Properties/AssemblyInfo.cs b/sdk/code-analysis/ServiceAnalysis/MediaStore/Properties/AssemblyInfo.cs
index 53b1ede0a132..8b4a5b5babfa 100644
--- a/sdk/code-analysis/ServiceAnalysis/MediaStore/Properties/AssemblyInfo.cs
+++ b/sdk/code-analysis/ServiceAnalysis/MediaStore/Properties/AssemblyInfo.cs
@@ -28,5 +28,5 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.300.84")]
\ No newline at end of file
+[assembly: AssemblyVersion("4.0")]
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/code-analysis/ServiceAnalysis/MediaStoreData/Properties/AssemblyInfo.cs b/sdk/code-analysis/ServiceAnalysis/MediaStoreData/Properties/AssemblyInfo.cs
index 4d77258e3593..7194dc4ce43f 100644
--- a/sdk/code-analysis/ServiceAnalysis/MediaStoreData/Properties/AssemblyInfo.cs
+++ b/sdk/code-analysis/ServiceAnalysis/MediaStoreData/Properties/AssemblyInfo.cs
@@ -28,5 +28,5 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.300.84")]
\ No newline at end of file
+[assembly: AssemblyVersion("4.0")]
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/code-analysis/ServiceAnalysis/MediaTailor/Properties/AssemblyInfo.cs b/sdk/code-analysis/ServiceAnalysis/MediaTailor/Properties/AssemblyInfo.cs
index 58a7ca46b789..0320b879b850 100644
--- a/sdk/code-analysis/ServiceAnalysis/MediaTailor/Properties/AssemblyInfo.cs
+++ b/sdk/code-analysis/ServiceAnalysis/MediaTailor/Properties/AssemblyInfo.cs
@@ -28,5 +28,5 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.305.10")]
\ No newline at end of file
+[assembly: AssemblyVersion("4.0")]
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/code-analysis/ServiceAnalysis/MedicalImaging/Properties/AssemblyInfo.cs b/sdk/code-analysis/ServiceAnalysis/MedicalImaging/Properties/AssemblyInfo.cs
index 34cc657ede7f..1e86f5b59492 100644
--- a/sdk/code-analysis/ServiceAnalysis/MedicalImaging/Properties/AssemblyInfo.cs
+++ b/sdk/code-analysis/ServiceAnalysis/MedicalImaging/Properties/AssemblyInfo.cs
@@ -28,5 +28,5 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.301.16")]
\ No newline at end of file
+[assembly: AssemblyVersion("4.0")]
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/code-analysis/ServiceAnalysis/MemoryDB/Properties/AssemblyInfo.cs b/sdk/code-analysis/ServiceAnalysis/MemoryDB/Properties/AssemblyInfo.cs
index 86cca3bf6eb2..3266b985c883 100644
--- a/sdk/code-analysis/ServiceAnalysis/MemoryDB/Properties/AssemblyInfo.cs
+++ b/sdk/code-analysis/ServiceAnalysis/MemoryDB/Properties/AssemblyInfo.cs
@@ -28,5 +28,5 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.300.84")]
\ No newline at end of file
+[assembly: AssemblyVersion("4.0")]
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/code-analysis/ServiceAnalysis/Mgn/Properties/AssemblyInfo.cs b/sdk/code-analysis/ServiceAnalysis/Mgn/Properties/AssemblyInfo.cs
index 3562d00bb832..13c625395ac5 100644
--- a/sdk/code-analysis/ServiceAnalysis/Mgn/Properties/AssemblyInfo.cs
+++ b/sdk/code-analysis/ServiceAnalysis/Mgn/Properties/AssemblyInfo.cs
@@ -28,5 +28,5 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.302.13")]
\ No newline at end of file
+[assembly: AssemblyVersion("4.0")]
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/code-analysis/ServiceAnalysis/MigrationHub/Properties/AssemblyInfo.cs b/sdk/code-analysis/ServiceAnalysis/MigrationHub/Properties/AssemblyInfo.cs
index 89f593f09014..3be807b084b1 100644
--- a/sdk/code-analysis/ServiceAnalysis/MigrationHub/Properties/AssemblyInfo.cs
+++ b/sdk/code-analysis/ServiceAnalysis/MigrationHub/Properties/AssemblyInfo.cs
@@ -28,5 +28,5 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.300.84")]
\ No newline at end of file
+[assembly: AssemblyVersion("4.0")]
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/code-analysis/ServiceAnalysis/MigrationHubConfig/Properties/AssemblyInfo.cs b/sdk/code-analysis/ServiceAnalysis/MigrationHubConfig/Properties/AssemblyInfo.cs
index 0b6b74dfd73b..22c3b90b7883 100644
--- a/sdk/code-analysis/ServiceAnalysis/MigrationHubConfig/Properties/AssemblyInfo.cs
+++ b/sdk/code-analysis/ServiceAnalysis/MigrationHubConfig/Properties/AssemblyInfo.cs
@@ -28,5 +28,5 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.300.84")]
\ No newline at end of file
+[assembly: AssemblyVersion("4.0")]
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/code-analysis/ServiceAnalysis/MigrationHubOrchestrator/Properties/AssemblyInfo.cs b/sdk/code-analysis/ServiceAnalysis/MigrationHubOrchestrator/Properties/AssemblyInfo.cs
index 1048e974c214..18c2d2834849 100644
--- a/sdk/code-analysis/ServiceAnalysis/MigrationHubOrchestrator/Properties/AssemblyInfo.cs
+++ b/sdk/code-analysis/ServiceAnalysis/MigrationHubOrchestrator/Properties/AssemblyInfo.cs
@@ -28,5 +28,5 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.301.30")]
\ No newline at end of file
+[assembly: AssemblyVersion("4.0")]
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/code-analysis/ServiceAnalysis/MigrationHubRefactorSpaces/Properties/AssemblyInfo.cs b/sdk/code-analysis/ServiceAnalysis/MigrationHubRefactorSpaces/Properties/AssemblyInfo.cs
index b601d6725771..4d811a500156 100644
--- a/sdk/code-analysis/ServiceAnalysis/MigrationHubRefactorSpaces/Properties/AssemblyInfo.cs
+++ b/sdk/code-analysis/ServiceAnalysis/MigrationHubRefactorSpaces/Properties/AssemblyInfo.cs
@@ -28,5 +28,5 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.300.84")]
\ No newline at end of file
+[assembly: AssemblyVersion("4.0")]
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/code-analysis/ServiceAnalysis/MigrationHubStrategyRecommendations/Properties/AssemblyInfo.cs b/sdk/code-analysis/ServiceAnalysis/MigrationHubStrategyRecommendations/Properties/AssemblyInfo.cs
index 18f518fc831b..adcd49d874bc 100644
--- a/sdk/code-analysis/ServiceAnalysis/MigrationHubStrategyRecommendations/Properties/AssemblyInfo.cs
+++ b/sdk/code-analysis/ServiceAnalysis/MigrationHubStrategyRecommendations/Properties/AssemblyInfo.cs
@@ -28,5 +28,5 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.300.84")]
\ No newline at end of file
+[assembly: AssemblyVersion("4.0")]
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/code-analysis/ServiceAnalysis/Mobile/Properties/AssemblyInfo.cs b/sdk/code-analysis/ServiceAnalysis/Mobile/Properties/AssemblyInfo.cs
index 86a50dc74835..f6596adbf5e8 100644
--- a/sdk/code-analysis/ServiceAnalysis/Mobile/Properties/AssemblyInfo.cs
+++ b/sdk/code-analysis/ServiceAnalysis/Mobile/Properties/AssemblyInfo.cs
@@ -28,5 +28,5 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.300.84")]
\ No newline at end of file
+[assembly: AssemblyVersion("4.0")]
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/code-analysis/ServiceAnalysis/MobileAnalytics/Properties/AssemblyInfo.cs b/sdk/code-analysis/ServiceAnalysis/MobileAnalytics/Properties/AssemblyInfo.cs
index 35c8ab26e793..0db474ed17e6 100644
--- a/sdk/code-analysis/ServiceAnalysis/MobileAnalytics/Properties/AssemblyInfo.cs
+++ b/sdk/code-analysis/ServiceAnalysis/MobileAnalytics/Properties/AssemblyInfo.cs
@@ -28,5 +28,5 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.300.84")]
\ No newline at end of file
+[assembly: AssemblyVersion("4.0")]
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/code-analysis/ServiceAnalysis/Neptune/Properties/AssemblyInfo.cs b/sdk/code-analysis/ServiceAnalysis/Neptune/Properties/AssemblyInfo.cs
index 546c40fd967e..825c7b21c16b 100644
--- a/sdk/code-analysis/ServiceAnalysis/Neptune/Properties/AssemblyInfo.cs
+++ b/sdk/code-analysis/ServiceAnalysis/Neptune/Properties/AssemblyInfo.cs
@@ -28,5 +28,5 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.301.68")]
\ No newline at end of file
+[assembly: AssemblyVersion("4.0")]
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/code-analysis/ServiceAnalysis/NeptuneGraph/Properties/AssemblyInfo.cs b/sdk/code-analysis/ServiceAnalysis/NeptuneGraph/Properties/AssemblyInfo.cs
index ec40d601d989..1dc90ab54667 100644
--- a/sdk/code-analysis/ServiceAnalysis/NeptuneGraph/Properties/AssemblyInfo.cs
+++ b/sdk/code-analysis/ServiceAnalysis/NeptuneGraph/Properties/AssemblyInfo.cs
@@ -28,5 +28,5 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.305.20")]
\ No newline at end of file
+[assembly: AssemblyVersion("4.0")]
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/code-analysis/ServiceAnalysis/Neptunedata/Properties/AssemblyInfo.cs b/sdk/code-analysis/ServiceAnalysis/Neptunedata/Properties/AssemblyInfo.cs
index fe1bd7b2cb05..4e917a52937a 100644
--- a/sdk/code-analysis/ServiceAnalysis/Neptunedata/Properties/AssemblyInfo.cs
+++ b/sdk/code-analysis/ServiceAnalysis/Neptunedata/Properties/AssemblyInfo.cs
@@ -28,5 +28,5 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.300.84")]
\ No newline at end of file
+[assembly: AssemblyVersion("4.0")]
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/code-analysis/ServiceAnalysis/NetworkFirewall/Properties/AssemblyInfo.cs b/sdk/code-analysis/ServiceAnalysis/NetworkFirewall/Properties/AssemblyInfo.cs
index be75d3999be4..fab4e0a86202 100644
--- a/sdk/code-analysis/ServiceAnalysis/NetworkFirewall/Properties/AssemblyInfo.cs
+++ b/sdk/code-analysis/ServiceAnalysis/NetworkFirewall/Properties/AssemblyInfo.cs
@@ -28,5 +28,5 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.300.84")]
\ No newline at end of file
+[assembly: AssemblyVersion("4.0")]
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/code-analysis/ServiceAnalysis/NetworkManager/Properties/AssemblyInfo.cs b/sdk/code-analysis/ServiceAnalysis/NetworkManager/Properties/AssemblyInfo.cs
index 09f1d7f70eca..ba501b10633f 100644
--- a/sdk/code-analysis/ServiceAnalysis/NetworkManager/Properties/AssemblyInfo.cs
+++ b/sdk/code-analysis/ServiceAnalysis/NetworkManager/Properties/AssemblyInfo.cs
@@ -28,5 +28,5 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.300.84")]
\ No newline at end of file
+[assembly: AssemblyVersion("4.0")]
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/code-analysis/ServiceAnalysis/NetworkMonitor/Properties/AssemblyInfo.cs b/sdk/code-analysis/ServiceAnalysis/NetworkMonitor/Properties/AssemblyInfo.cs
index 47599fb52bed..e18ef04c6dad 100644
--- a/sdk/code-analysis/ServiceAnalysis/NetworkMonitor/Properties/AssemblyInfo.cs
+++ b/sdk/code-analysis/ServiceAnalysis/NetworkMonitor/Properties/AssemblyInfo.cs
@@ -28,5 +28,5 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.301.13")]
\ No newline at end of file
+[assembly: AssemblyVersion("4.0")]
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/code-analysis/ServiceAnalysis/NimbleStudio/Properties/AssemblyInfo.cs b/sdk/code-analysis/ServiceAnalysis/NimbleStudio/Properties/AssemblyInfo.cs
index 164fd456d600..788237e0373f 100644
--- a/sdk/code-analysis/ServiceAnalysis/NimbleStudio/Properties/AssemblyInfo.cs
+++ b/sdk/code-analysis/ServiceAnalysis/NimbleStudio/Properties/AssemblyInfo.cs
@@ -28,5 +28,5 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.300.84")]
\ No newline at end of file
+[assembly: AssemblyVersion("4.0")]
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/code-analysis/ServiceAnalysis/OAM/Properties/AssemblyInfo.cs b/sdk/code-analysis/ServiceAnalysis/OAM/Properties/AssemblyInfo.cs
index 33c0f8b44ca4..2ba81fac4c84 100644
--- a/sdk/code-analysis/ServiceAnalysis/OAM/Properties/AssemblyInfo.cs
+++ b/sdk/code-analysis/ServiceAnalysis/OAM/Properties/AssemblyInfo.cs
@@ -28,5 +28,5 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.302.1")]
\ No newline at end of file
+[assembly: AssemblyVersion("4.0")]
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/code-analysis/ServiceAnalysis/OSIS/Properties/AssemblyInfo.cs b/sdk/code-analysis/ServiceAnalysis/OSIS/Properties/AssemblyInfo.cs
index c158654a5e45..87e40c9b574e 100644
--- a/sdk/code-analysis/ServiceAnalysis/OSIS/Properties/AssemblyInfo.cs
+++ b/sdk/code-analysis/ServiceAnalysis/OSIS/Properties/AssemblyInfo.cs
@@ -28,5 +28,5 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.301.79")]
\ No newline at end of file
+[assembly: AssemblyVersion("4.0")]
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/code-analysis/ServiceAnalysis/Omics/Properties/AssemblyInfo.cs b/sdk/code-analysis/ServiceAnalysis/Omics/Properties/AssemblyInfo.cs
index aaa216bef4d7..6b6edf75ed14 100644
--- a/sdk/code-analysis/ServiceAnalysis/Omics/Properties/AssemblyInfo.cs
+++ b/sdk/code-analysis/ServiceAnalysis/Omics/Properties/AssemblyInfo.cs
@@ -28,5 +28,5 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.302.0")]
\ No newline at end of file
+[assembly: AssemblyVersion("4.0")]
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/code-analysis/ServiceAnalysis/OpenSearchServerless/Properties/AssemblyInfo.cs b/sdk/code-analysis/ServiceAnalysis/OpenSearchServerless/Properties/AssemblyInfo.cs
index 6ac90aca591b..e8433fbead7b 100644
--- a/sdk/code-analysis/ServiceAnalysis/OpenSearchServerless/Properties/AssemblyInfo.cs
+++ b/sdk/code-analysis/ServiceAnalysis/OpenSearchServerless/Properties/AssemblyInfo.cs
@@ -28,5 +28,5 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.301.73")]
\ No newline at end of file
+[assembly: AssemblyVersion("4.0")]
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/code-analysis/ServiceAnalysis/OpenSearchService/Properties/AssemblyInfo.cs b/sdk/code-analysis/ServiceAnalysis/OpenSearchService/Properties/AssemblyInfo.cs
index 7bb8edf46eb9..4f08bddaa243 100644
--- a/sdk/code-analysis/ServiceAnalysis/OpenSearchService/Properties/AssemblyInfo.cs
+++ b/sdk/code-analysis/ServiceAnalysis/OpenSearchService/Properties/AssemblyInfo.cs
@@ -28,5 +28,5 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.306.0")]
\ No newline at end of file
+[assembly: AssemblyVersion("4.0")]
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/code-analysis/ServiceAnalysis/OpsWorks/Properties/AssemblyInfo.cs b/sdk/code-analysis/ServiceAnalysis/OpsWorks/Properties/AssemblyInfo.cs
index da5a8856a278..e30eefe7763c 100644
--- a/sdk/code-analysis/ServiceAnalysis/OpsWorks/Properties/AssemblyInfo.cs
+++ b/sdk/code-analysis/ServiceAnalysis/OpsWorks/Properties/AssemblyInfo.cs
@@ -28,5 +28,5 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.300.84")]
\ No newline at end of file
+[assembly: AssemblyVersion("4.0")]
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/code-analysis/ServiceAnalysis/OpsWorksCM/Properties/AssemblyInfo.cs b/sdk/code-analysis/ServiceAnalysis/OpsWorksCM/Properties/AssemblyInfo.cs
index 164a1c5b639b..1351574cbe6b 100644
--- a/sdk/code-analysis/ServiceAnalysis/OpsWorksCM/Properties/AssemblyInfo.cs
+++ b/sdk/code-analysis/ServiceAnalysis/OpsWorksCM/Properties/AssemblyInfo.cs
@@ -28,5 +28,5 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.300.84")]
\ No newline at end of file
+[assembly: AssemblyVersion("4.0")]
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/code-analysis/ServiceAnalysis/Organizations/Properties/AssemblyInfo.cs b/sdk/code-analysis/ServiceAnalysis/Organizations/Properties/AssemblyInfo.cs
index e8c4bbe988a3..2a266c77cf41 100644
--- a/sdk/code-analysis/ServiceAnalysis/Organizations/Properties/AssemblyInfo.cs
+++ b/sdk/code-analysis/ServiceAnalysis/Organizations/Properties/AssemblyInfo.cs
@@ -28,5 +28,5 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.302.30")]
\ No newline at end of file
+[assembly: AssemblyVersion("4.0")]
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/code-analysis/ServiceAnalysis/Outposts/Properties/AssemblyInfo.cs b/sdk/code-analysis/ServiceAnalysis/Outposts/Properties/AssemblyInfo.cs
index 1f3806c0e014..2898f6254c36 100644
--- a/sdk/code-analysis/ServiceAnalysis/Outposts/Properties/AssemblyInfo.cs
+++ b/sdk/code-analysis/ServiceAnalysis/Outposts/Properties/AssemblyInfo.cs
@@ -28,5 +28,5 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.303.9")]
\ No newline at end of file
+[assembly: AssemblyVersion("4.0")]
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/code-analysis/ServiceAnalysis/PI/Properties/AssemblyInfo.cs b/sdk/code-analysis/ServiceAnalysis/PI/Properties/AssemblyInfo.cs
index 794b710ea5df..e88f48a067a4 100644
--- a/sdk/code-analysis/ServiceAnalysis/PI/Properties/AssemblyInfo.cs
+++ b/sdk/code-analysis/ServiceAnalysis/PI/Properties/AssemblyInfo.cs
@@ -28,5 +28,5 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.300.84")]
\ No newline at end of file
+[assembly: AssemblyVersion("4.0")]
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/code-analysis/ServiceAnalysis/Panorama/Properties/AssemblyInfo.cs b/sdk/code-analysis/ServiceAnalysis/Panorama/Properties/AssemblyInfo.cs
index c1c2598dfddb..80dc40a6e6e3 100644
--- a/sdk/code-analysis/ServiceAnalysis/Panorama/Properties/AssemblyInfo.cs
+++ b/sdk/code-analysis/ServiceAnalysis/Panorama/Properties/AssemblyInfo.cs
@@ -28,5 +28,5 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.300.84")]
\ No newline at end of file
+[assembly: AssemblyVersion("4.0")]
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/code-analysis/ServiceAnalysis/PaymentCryptography/Properties/AssemblyInfo.cs b/sdk/code-analysis/ServiceAnalysis/PaymentCryptography/Properties/AssemblyInfo.cs
index 26963e95a90f..5e7960414579 100644
--- a/sdk/code-analysis/ServiceAnalysis/PaymentCryptography/Properties/AssemblyInfo.cs
+++ b/sdk/code-analysis/ServiceAnalysis/PaymentCryptography/Properties/AssemblyInfo.cs
@@ -28,5 +28,5 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.303.5")]
\ No newline at end of file
+[assembly: AssemblyVersion("4.0")]
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/code-analysis/ServiceAnalysis/PaymentCryptographyData/Properties/AssemblyInfo.cs b/sdk/code-analysis/ServiceAnalysis/PaymentCryptographyData/Properties/AssemblyInfo.cs
index b1cb44fba784..25433c6ec5bd 100644
--- a/sdk/code-analysis/ServiceAnalysis/PaymentCryptographyData/Properties/AssemblyInfo.cs
+++ b/sdk/code-analysis/ServiceAnalysis/PaymentCryptographyData/Properties/AssemblyInfo.cs
@@ -28,5 +28,5 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.301.30")]
\ No newline at end of file
+[assembly: AssemblyVersion("4.0")]
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/code-analysis/ServiceAnalysis/PcaConnectorAd/Properties/AssemblyInfo.cs b/sdk/code-analysis/ServiceAnalysis/PcaConnectorAd/Properties/AssemblyInfo.cs
index 4c86741b1486..818cd5e95313 100644
--- a/sdk/code-analysis/ServiceAnalysis/PcaConnectorAd/Properties/AssemblyInfo.cs
+++ b/sdk/code-analysis/ServiceAnalysis/PcaConnectorAd/Properties/AssemblyInfo.cs
@@ -28,5 +28,5 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.300.84")]
\ No newline at end of file
+[assembly: AssemblyVersion("4.0")]
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/code-analysis/ServiceAnalysis/Personalize/Properties/AssemblyInfo.cs b/sdk/code-analysis/ServiceAnalysis/Personalize/Properties/AssemblyInfo.cs
index 5c9b05f0881a..7d9b5c9f79b1 100644
--- a/sdk/code-analysis/ServiceAnalysis/Personalize/Properties/AssemblyInfo.cs
+++ b/sdk/code-analysis/ServiceAnalysis/Personalize/Properties/AssemblyInfo.cs
@@ -28,5 +28,5 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.302.6")]
\ No newline at end of file
+[assembly: AssemblyVersion("4.0")]
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/code-analysis/ServiceAnalysis/PersonalizeEvents/Properties/AssemblyInfo.cs b/sdk/code-analysis/ServiceAnalysis/PersonalizeEvents/Properties/AssemblyInfo.cs
index bd7c466e7479..4ecda45967c3 100644
--- a/sdk/code-analysis/ServiceAnalysis/PersonalizeEvents/Properties/AssemblyInfo.cs
+++ b/sdk/code-analysis/ServiceAnalysis/PersonalizeEvents/Properties/AssemblyInfo.cs
@@ -28,5 +28,5 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.301.76")]
\ No newline at end of file
+[assembly: AssemblyVersion("4.0")]
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/code-analysis/ServiceAnalysis/PersonalizeRuntime/Properties/AssemblyInfo.cs b/sdk/code-analysis/ServiceAnalysis/PersonalizeRuntime/Properties/AssemblyInfo.cs
index f3bd76f0aaa5..d9ce425b09c9 100644
--- a/sdk/code-analysis/ServiceAnalysis/PersonalizeRuntime/Properties/AssemblyInfo.cs
+++ b/sdk/code-analysis/ServiceAnalysis/PersonalizeRuntime/Properties/AssemblyInfo.cs
@@ -28,5 +28,5 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.301.76")]
\ No newline at end of file
+[assembly: AssemblyVersion("4.0")]
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/code-analysis/ServiceAnalysis/Pinpoint/Properties/AssemblyInfo.cs b/sdk/code-analysis/ServiceAnalysis/Pinpoint/Properties/AssemblyInfo.cs
index 0ed834e53cec..f7aa3fed3ccc 100644
--- a/sdk/code-analysis/ServiceAnalysis/Pinpoint/Properties/AssemblyInfo.cs
+++ b/sdk/code-analysis/ServiceAnalysis/Pinpoint/Properties/AssemblyInfo.cs
@@ -28,5 +28,5 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.301.12")]
\ No newline at end of file
+[assembly: AssemblyVersion("4.0")]
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/code-analysis/ServiceAnalysis/PinpointEmail/Properties/AssemblyInfo.cs b/sdk/code-analysis/ServiceAnalysis/PinpointEmail/Properties/AssemblyInfo.cs
index 0de50cfe761a..555df24ffafc 100644
--- a/sdk/code-analysis/ServiceAnalysis/PinpointEmail/Properties/AssemblyInfo.cs
+++ b/sdk/code-analysis/ServiceAnalysis/PinpointEmail/Properties/AssemblyInfo.cs
@@ -28,5 +28,5 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.300.84")]
\ No newline at end of file
+[assembly: AssemblyVersion("4.0")]
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/code-analysis/ServiceAnalysis/PinpointSMSVoice/Properties/AssemblyInfo.cs b/sdk/code-analysis/ServiceAnalysis/PinpointSMSVoice/Properties/AssemblyInfo.cs
index 0926c24f7156..91a7a0acd832 100644
--- a/sdk/code-analysis/ServiceAnalysis/PinpointSMSVoice/Properties/AssemblyInfo.cs
+++ b/sdk/code-analysis/ServiceAnalysis/PinpointSMSVoice/Properties/AssemblyInfo.cs
@@ -28,5 +28,5 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.300.84")]
\ No newline at end of file
+[assembly: AssemblyVersion("4.0")]
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/code-analysis/ServiceAnalysis/PinpointSMSVoiceV2/Properties/AssemblyInfo.cs b/sdk/code-analysis/ServiceAnalysis/PinpointSMSVoiceV2/Properties/AssemblyInfo.cs
index eb83de81de38..a141a27d51de 100644
--- a/sdk/code-analysis/ServiceAnalysis/PinpointSMSVoiceV2/Properties/AssemblyInfo.cs
+++ b/sdk/code-analysis/ServiceAnalysis/PinpointSMSVoiceV2/Properties/AssemblyInfo.cs
@@ -28,5 +28,5 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.302.0")]
\ No newline at end of file
+[assembly: AssemblyVersion("4.0")]
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/code-analysis/ServiceAnalysis/Pipes/Properties/AssemblyInfo.cs b/sdk/code-analysis/ServiceAnalysis/Pipes/Properties/AssemblyInfo.cs
index 8b09418ca52c..a12b4f34ebb0 100644
--- a/sdk/code-analysis/ServiceAnalysis/Pipes/Properties/AssemblyInfo.cs
+++ b/sdk/code-analysis/ServiceAnalysis/Pipes/Properties/AssemblyInfo.cs
@@ -28,5 +28,5 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.303.10")]
\ No newline at end of file
+[assembly: AssemblyVersion("4.0")]
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/code-analysis/ServiceAnalysis/Polly/Properties/AssemblyInfo.cs b/sdk/code-analysis/ServiceAnalysis/Polly/Properties/AssemblyInfo.cs
index 30ae07666bde..9a7b954fa331 100644
--- a/sdk/code-analysis/ServiceAnalysis/Polly/Properties/AssemblyInfo.cs
+++ b/sdk/code-analysis/ServiceAnalysis/Polly/Properties/AssemblyInfo.cs
@@ -28,5 +28,5 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.302.33")]
\ No newline at end of file
+[assembly: AssemblyVersion("4.0")]
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/code-analysis/ServiceAnalysis/Pricing/Properties/AssemblyInfo.cs b/sdk/code-analysis/ServiceAnalysis/Pricing/Properties/AssemblyInfo.cs
index d8357158cbdd..c2d19efbd016 100644
--- a/sdk/code-analysis/ServiceAnalysis/Pricing/Properties/AssemblyInfo.cs
+++ b/sdk/code-analysis/ServiceAnalysis/Pricing/Properties/AssemblyInfo.cs
@@ -28,5 +28,5 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.302.24")]
\ No newline at end of file
+[assembly: AssemblyVersion("4.0")]
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/code-analysis/ServiceAnalysis/Private5G/Properties/AssemblyInfo.cs b/sdk/code-analysis/ServiceAnalysis/Private5G/Properties/AssemblyInfo.cs
index d28c042eea03..991f349ec35a 100644
--- a/sdk/code-analysis/ServiceAnalysis/Private5G/Properties/AssemblyInfo.cs
+++ b/sdk/code-analysis/ServiceAnalysis/Private5G/Properties/AssemblyInfo.cs
@@ -28,5 +28,5 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.300.84")]
\ No newline at end of file
+[assembly: AssemblyVersion("4.0")]
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/code-analysis/ServiceAnalysis/PrometheusService/Properties/AssemblyInfo.cs b/sdk/code-analysis/ServiceAnalysis/PrometheusService/Properties/AssemblyInfo.cs
index 7ea1f48ac985..88b9df966e89 100644
--- a/sdk/code-analysis/ServiceAnalysis/PrometheusService/Properties/AssemblyInfo.cs
+++ b/sdk/code-analysis/ServiceAnalysis/PrometheusService/Properties/AssemblyInfo.cs
@@ -28,5 +28,5 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.302.60")]
\ No newline at end of file
+[assembly: AssemblyVersion("4.0")]
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/code-analysis/ServiceAnalysis/Proton/Properties/AssemblyInfo.cs b/sdk/code-analysis/ServiceAnalysis/Proton/Properties/AssemblyInfo.cs
index e6fc01661538..ffb704141cc7 100644
--- a/sdk/code-analysis/ServiceAnalysis/Proton/Properties/AssemblyInfo.cs
+++ b/sdk/code-analysis/ServiceAnalysis/Proton/Properties/AssemblyInfo.cs
@@ -28,5 +28,5 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.300.84")]
\ No newline at end of file
+[assembly: AssemblyVersion("4.0")]
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/code-analysis/ServiceAnalysis/QBusiness/Properties/AssemblyInfo.cs b/sdk/code-analysis/ServiceAnalysis/QBusiness/Properties/AssemblyInfo.cs
index 515cb2fbcc01..ab638958b167 100644
--- a/sdk/code-analysis/ServiceAnalysis/QBusiness/Properties/AssemblyInfo.cs
+++ b/sdk/code-analysis/ServiceAnalysis/QBusiness/Properties/AssemblyInfo.cs
@@ -28,5 +28,5 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.303.0")]
\ No newline at end of file
+[assembly: AssemblyVersion("4.0")]
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/code-analysis/ServiceAnalysis/QConnect/Properties/AssemblyInfo.cs b/sdk/code-analysis/ServiceAnalysis/QConnect/Properties/AssemblyInfo.cs
index efca8dc1984f..b1a6298f8759 100644
--- a/sdk/code-analysis/ServiceAnalysis/QConnect/Properties/AssemblyInfo.cs
+++ b/sdk/code-analysis/ServiceAnalysis/QConnect/Properties/AssemblyInfo.cs
@@ -28,5 +28,5 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.304.11")]
\ No newline at end of file
+[assembly: AssemblyVersion("4.0")]
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/code-analysis/ServiceAnalysis/QLDB/Properties/AssemblyInfo.cs b/sdk/code-analysis/ServiceAnalysis/QLDB/Properties/AssemblyInfo.cs
index 64c07a3a2be2..283b4f9ec5e0 100644
--- a/sdk/code-analysis/ServiceAnalysis/QLDB/Properties/AssemblyInfo.cs
+++ b/sdk/code-analysis/ServiceAnalysis/QLDB/Properties/AssemblyInfo.cs
@@ -28,5 +28,5 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.300.85")]
\ No newline at end of file
+[assembly: AssemblyVersion("4.0")]
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/code-analysis/ServiceAnalysis/QLDBSession/Properties/AssemblyInfo.cs b/sdk/code-analysis/ServiceAnalysis/QLDBSession/Properties/AssemblyInfo.cs
index 11d5abdec198..1df38cd0b200 100644
--- a/sdk/code-analysis/ServiceAnalysis/QLDBSession/Properties/AssemblyInfo.cs
+++ b/sdk/code-analysis/ServiceAnalysis/QLDBSession/Properties/AssemblyInfo.cs
@@ -28,5 +28,5 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.300.84")]
\ No newline at end of file
+[assembly: AssemblyVersion("4.0")]
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/code-analysis/ServiceAnalysis/QuickSight/Properties/AssemblyInfo.cs b/sdk/code-analysis/ServiceAnalysis/QuickSight/Properties/AssemblyInfo.cs
index 404c7ca588f7..199f8d141a2b 100644
--- a/sdk/code-analysis/ServiceAnalysis/QuickSight/Properties/AssemblyInfo.cs
+++ b/sdk/code-analysis/ServiceAnalysis/QuickSight/Properties/AssemblyInfo.cs
@@ -28,5 +28,5 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.310.0")]
\ No newline at end of file
+[assembly: AssemblyVersion("4.0")]
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/code-analysis/ServiceAnalysis/RAM/Properties/AssemblyInfo.cs b/sdk/code-analysis/ServiceAnalysis/RAM/Properties/AssemblyInfo.cs
index 6639a37a5c3b..36969860c783 100644
--- a/sdk/code-analysis/ServiceAnalysis/RAM/Properties/AssemblyInfo.cs
+++ b/sdk/code-analysis/ServiceAnalysis/RAM/Properties/AssemblyInfo.cs
@@ -28,5 +28,5 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.300.84")]
\ No newline at end of file
+[assembly: AssemblyVersion("4.0")]
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/code-analysis/ServiceAnalysis/RDS/Properties/AssemblyInfo.cs b/sdk/code-analysis/ServiceAnalysis/RDS/Properties/AssemblyInfo.cs
index 9347fe1c107a..1b918c152b5f 100644
--- a/sdk/code-analysis/ServiceAnalysis/RDS/Properties/AssemblyInfo.cs
+++ b/sdk/code-analysis/ServiceAnalysis/RDS/Properties/AssemblyInfo.cs
@@ -28,5 +28,5 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.312.1")]
\ No newline at end of file
+[assembly: AssemblyVersion("4.0")]
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/code-analysis/ServiceAnalysis/RDSDataService/Properties/AssemblyInfo.cs b/sdk/code-analysis/ServiceAnalysis/RDSDataService/Properties/AssemblyInfo.cs
index 9ac41582ea10..3cd208dac43e 100644
--- a/sdk/code-analysis/ServiceAnalysis/RDSDataService/Properties/AssemblyInfo.cs
+++ b/sdk/code-analysis/ServiceAnalysis/RDSDataService/Properties/AssemblyInfo.cs
@@ -28,5 +28,5 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.301.60")]
\ No newline at end of file
+[assembly: AssemblyVersion("4.0")]
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/code-analysis/ServiceAnalysis/RecycleBin/Properties/AssemblyInfo.cs b/sdk/code-analysis/ServiceAnalysis/RecycleBin/Properties/AssemblyInfo.cs
index bdd92ed0aea1..2fd0e3c9251d 100644
--- a/sdk/code-analysis/ServiceAnalysis/RecycleBin/Properties/AssemblyInfo.cs
+++ b/sdk/code-analysis/ServiceAnalysis/RecycleBin/Properties/AssemblyInfo.cs
@@ -28,5 +28,5 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.301.72")]
\ No newline at end of file
+[assembly: AssemblyVersion("4.0")]
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/code-analysis/ServiceAnalysis/Redshift/Properties/AssemblyInfo.cs b/sdk/code-analysis/ServiceAnalysis/Redshift/Properties/AssemblyInfo.cs
index 4bcc4d10dc83..a844f54ea37a 100644
--- a/sdk/code-analysis/ServiceAnalysis/Redshift/Properties/AssemblyInfo.cs
+++ b/sdk/code-analysis/ServiceAnalysis/Redshift/Properties/AssemblyInfo.cs
@@ -28,5 +28,5 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.305.10")]
\ No newline at end of file
+[assembly: AssemblyVersion("4.0")]
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/code-analysis/ServiceAnalysis/RedshiftDataAPIService/Properties/AssemblyInfo.cs b/sdk/code-analysis/ServiceAnalysis/RedshiftDataAPIService/Properties/AssemblyInfo.cs
index 0c2a474b25b2..2a6e975879b2 100644
--- a/sdk/code-analysis/ServiceAnalysis/RedshiftDataAPIService/Properties/AssemblyInfo.cs
+++ b/sdk/code-analysis/ServiceAnalysis/RedshiftDataAPIService/Properties/AssemblyInfo.cs
@@ -28,5 +28,5 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.300.84")]
\ No newline at end of file
+[assembly: AssemblyVersion("4.0")]
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/code-analysis/ServiceAnalysis/RedshiftServerless/Properties/AssemblyInfo.cs b/sdk/code-analysis/ServiceAnalysis/RedshiftServerless/Properties/AssemblyInfo.cs
index 02b1e2ac9ba2..bd5e5cbe58af 100644
--- a/sdk/code-analysis/ServiceAnalysis/RedshiftServerless/Properties/AssemblyInfo.cs
+++ b/sdk/code-analysis/ServiceAnalysis/RedshiftServerless/Properties/AssemblyInfo.cs
@@ -28,5 +28,5 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.302.72")]
\ No newline at end of file
+[assembly: AssemblyVersion("4.0")]
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/code-analysis/ServiceAnalysis/Rekognition/Properties/AssemblyInfo.cs b/sdk/code-analysis/ServiceAnalysis/Rekognition/Properties/AssemblyInfo.cs
index 37d2c748dfee..925c83dbf942 100644
--- a/sdk/code-analysis/ServiceAnalysis/Rekognition/Properties/AssemblyInfo.cs
+++ b/sdk/code-analysis/ServiceAnalysis/Rekognition/Properties/AssemblyInfo.cs
@@ -28,5 +28,5 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.302.11")]
\ No newline at end of file
+[assembly: AssemblyVersion("4.0")]
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/code-analysis/ServiceAnalysis/Repostspace/Properties/AssemblyInfo.cs b/sdk/code-analysis/ServiceAnalysis/Repostspace/Properties/AssemblyInfo.cs
index d68ba73777ef..1d2a083b87fd 100644
--- a/sdk/code-analysis/ServiceAnalysis/Repostspace/Properties/AssemblyInfo.cs
+++ b/sdk/code-analysis/ServiceAnalysis/Repostspace/Properties/AssemblyInfo.cs
@@ -28,5 +28,5 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.300.76")]
\ No newline at end of file
+[assembly: AssemblyVersion("4.0")]
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/code-analysis/ServiceAnalysis/ResilienceHub/Properties/AssemblyInfo.cs b/sdk/code-analysis/ServiceAnalysis/ResilienceHub/Properties/AssemblyInfo.cs
index 38ea4d01e18c..46643c904ff3 100644
--- a/sdk/code-analysis/ServiceAnalysis/ResilienceHub/Properties/AssemblyInfo.cs
+++ b/sdk/code-analysis/ServiceAnalysis/ResilienceHub/Properties/AssemblyInfo.cs
@@ -28,5 +28,5 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.300.84")]
\ No newline at end of file
+[assembly: AssemblyVersion("4.0")]
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/code-analysis/ServiceAnalysis/ResourceExplorer2/Properties/AssemblyInfo.cs b/sdk/code-analysis/ServiceAnalysis/ResourceExplorer2/Properties/AssemblyInfo.cs
index 79414e983452..e0263c619b0f 100644
--- a/sdk/code-analysis/ServiceAnalysis/ResourceExplorer2/Properties/AssemblyInfo.cs
+++ b/sdk/code-analysis/ServiceAnalysis/ResourceExplorer2/Properties/AssemblyInfo.cs
@@ -28,5 +28,5 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.302.35")]
\ No newline at end of file
+[assembly: AssemblyVersion("4.0")]
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/code-analysis/ServiceAnalysis/ResourceGroups/Properties/AssemblyInfo.cs b/sdk/code-analysis/ServiceAnalysis/ResourceGroups/Properties/AssemblyInfo.cs
index e5ab43ba3f52..a3985502e881 100644
--- a/sdk/code-analysis/ServiceAnalysis/ResourceGroups/Properties/AssemblyInfo.cs
+++ b/sdk/code-analysis/ServiceAnalysis/ResourceGroups/Properties/AssemblyInfo.cs
@@ -28,5 +28,5 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.301.14")]
\ No newline at end of file
+[assembly: AssemblyVersion("4.0")]
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/code-analysis/ServiceAnalysis/ResourceGroupsTaggingAPI/Properties/AssemblyInfo.cs b/sdk/code-analysis/ServiceAnalysis/ResourceGroupsTaggingAPI/Properties/AssemblyInfo.cs
index 37e362d2ce8b..fff8247ce766 100644
--- a/sdk/code-analysis/ServiceAnalysis/ResourceGroupsTaggingAPI/Properties/AssemblyInfo.cs
+++ b/sdk/code-analysis/ServiceAnalysis/ResourceGroupsTaggingAPI/Properties/AssemblyInfo.cs
@@ -28,5 +28,5 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.300.84")]
\ No newline at end of file
+[assembly: AssemblyVersion("4.0")]
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/code-analysis/ServiceAnalysis/RoboMaker/Properties/AssemblyInfo.cs b/sdk/code-analysis/ServiceAnalysis/RoboMaker/Properties/AssemblyInfo.cs
index 6caebbfd3530..0359b922fc24 100644
--- a/sdk/code-analysis/ServiceAnalysis/RoboMaker/Properties/AssemblyInfo.cs
+++ b/sdk/code-analysis/ServiceAnalysis/RoboMaker/Properties/AssemblyInfo.cs
@@ -28,5 +28,5 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.300.84")]
\ No newline at end of file
+[assembly: AssemblyVersion("4.0")]
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/code-analysis/ServiceAnalysis/Route53/Properties/AssemblyInfo.cs b/sdk/code-analysis/ServiceAnalysis/Route53/Properties/AssemblyInfo.cs
index f75abb20bd88..4af394148ec5 100644
--- a/sdk/code-analysis/ServiceAnalysis/Route53/Properties/AssemblyInfo.cs
+++ b/sdk/code-analysis/ServiceAnalysis/Route53/Properties/AssemblyInfo.cs
@@ -28,5 +28,5 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.302.51")]
\ No newline at end of file
+[assembly: AssemblyVersion("4.0")]
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/code-analysis/ServiceAnalysis/Route53Domains/Properties/AssemblyInfo.cs b/sdk/code-analysis/ServiceAnalysis/Route53Domains/Properties/AssemblyInfo.cs
index 2f9bbefa3246..82752387dc98 100644
--- a/sdk/code-analysis/ServiceAnalysis/Route53Domains/Properties/AssemblyInfo.cs
+++ b/sdk/code-analysis/ServiceAnalysis/Route53Domains/Properties/AssemblyInfo.cs
@@ -28,5 +28,5 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.301.36")]
\ No newline at end of file
+[assembly: AssemblyVersion("4.0")]
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/code-analysis/ServiceAnalysis/Route53Profiles/Properties/AssemblyInfo.cs b/sdk/code-analysis/ServiceAnalysis/Route53Profiles/Properties/AssemblyInfo.cs
index 1f01d64ac76b..cf2508b5a02d 100644
--- a/sdk/code-analysis/ServiceAnalysis/Route53Profiles/Properties/AssemblyInfo.cs
+++ b/sdk/code-analysis/ServiceAnalysis/Route53Profiles/Properties/AssemblyInfo.cs
@@ -28,5 +28,5 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.300.5")]
\ No newline at end of file
+[assembly: AssemblyVersion("4.0")]
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/code-analysis/ServiceAnalysis/Route53RecoveryCluster/Properties/AssemblyInfo.cs b/sdk/code-analysis/ServiceAnalysis/Route53RecoveryCluster/Properties/AssemblyInfo.cs
index ae69881d0657..6c32abf197b3 100644
--- a/sdk/code-analysis/ServiceAnalysis/Route53RecoveryCluster/Properties/AssemblyInfo.cs
+++ b/sdk/code-analysis/ServiceAnalysis/Route53RecoveryCluster/Properties/AssemblyInfo.cs
@@ -28,5 +28,5 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.300.84")]
\ No newline at end of file
+[assembly: AssemblyVersion("4.0")]
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/code-analysis/ServiceAnalysis/Route53RecoveryControlConfig/Properties/AssemblyInfo.cs b/sdk/code-analysis/ServiceAnalysis/Route53RecoveryControlConfig/Properties/AssemblyInfo.cs
index 54bd213e61e1..1695919eb56b 100644
--- a/sdk/code-analysis/ServiceAnalysis/Route53RecoveryControlConfig/Properties/AssemblyInfo.cs
+++ b/sdk/code-analysis/ServiceAnalysis/Route53RecoveryControlConfig/Properties/AssemblyInfo.cs
@@ -28,5 +28,5 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.300.84")]
\ No newline at end of file
+[assembly: AssemblyVersion("4.0")]
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/code-analysis/ServiceAnalysis/Route53RecoveryReadiness/Properties/AssemblyInfo.cs b/sdk/code-analysis/ServiceAnalysis/Route53RecoveryReadiness/Properties/AssemblyInfo.cs
index 9784b000b0be..0a704a70cad7 100644
--- a/sdk/code-analysis/ServiceAnalysis/Route53RecoveryReadiness/Properties/AssemblyInfo.cs
+++ b/sdk/code-analysis/ServiceAnalysis/Route53RecoveryReadiness/Properties/AssemblyInfo.cs
@@ -28,5 +28,5 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.300.84")]
\ No newline at end of file
+[assembly: AssemblyVersion("4.0")]
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/code-analysis/ServiceAnalysis/Route53Resolver/Properties/AssemblyInfo.cs b/sdk/code-analysis/ServiceAnalysis/Route53Resolver/Properties/AssemblyInfo.cs
index 21fcf2e1148f..7d33a27a9460 100644
--- a/sdk/code-analysis/ServiceAnalysis/Route53Resolver/Properties/AssemblyInfo.cs
+++ b/sdk/code-analysis/ServiceAnalysis/Route53Resolver/Properties/AssemblyInfo.cs
@@ -28,5 +28,5 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.303.0")]
\ No newline at end of file
+[assembly: AssemblyVersion("4.0")]
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/code-analysis/ServiceAnalysis/S3/Properties/AssemblyInfo.cs b/sdk/code-analysis/ServiceAnalysis/S3/Properties/AssemblyInfo.cs
index 69ccec8a7ca2..b4339fdd93d9 100644
--- a/sdk/code-analysis/ServiceAnalysis/S3/Properties/AssemblyInfo.cs
+++ b/sdk/code-analysis/ServiceAnalysis/S3/Properties/AssemblyInfo.cs
@@ -28,5 +28,5 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.307.25")]
\ No newline at end of file
+[assembly: AssemblyVersion("4.0")]
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/code-analysis/ServiceAnalysis/S3Control/Properties/AssemblyInfo.cs b/sdk/code-analysis/ServiceAnalysis/S3Control/Properties/AssemblyInfo.cs
index 4fa5a1a28456..8871ec0c11a9 100644
--- a/sdk/code-analysis/ServiceAnalysis/S3Control/Properties/AssemblyInfo.cs
+++ b/sdk/code-analysis/ServiceAnalysis/S3Control/Properties/AssemblyInfo.cs
@@ -28,5 +28,5 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.305.49")]
\ No newline at end of file
+[assembly: AssemblyVersion("4.0")]
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/code-analysis/ServiceAnalysis/S3Outposts/Properties/AssemblyInfo.cs b/sdk/code-analysis/ServiceAnalysis/S3Outposts/Properties/AssemblyInfo.cs
index 3563e05b1c98..1a1024b9d793 100644
--- a/sdk/code-analysis/ServiceAnalysis/S3Outposts/Properties/AssemblyInfo.cs
+++ b/sdk/code-analysis/ServiceAnalysis/S3Outposts/Properties/AssemblyInfo.cs
@@ -28,5 +28,5 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.300.84")]
\ No newline at end of file
+[assembly: AssemblyVersion("4.0")]
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/code-analysis/ServiceAnalysis/SQS/Properties/AssemblyInfo.cs b/sdk/code-analysis/ServiceAnalysis/SQS/Properties/AssemblyInfo.cs
index f36d401a8416..d303b3eb643f 100644
--- a/sdk/code-analysis/ServiceAnalysis/SQS/Properties/AssemblyInfo.cs
+++ b/sdk/code-analysis/ServiceAnalysis/SQS/Properties/AssemblyInfo.cs
@@ -28,5 +28,5 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.300.84")]
\ No newline at end of file
+[assembly: AssemblyVersion("4.0")]
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/code-analysis/ServiceAnalysis/SSMContacts/Properties/AssemblyInfo.cs b/sdk/code-analysis/ServiceAnalysis/SSMContacts/Properties/AssemblyInfo.cs
index 4da1ccfd1dd7..a9279c0c0857 100644
--- a/sdk/code-analysis/ServiceAnalysis/SSMContacts/Properties/AssemblyInfo.cs
+++ b/sdk/code-analysis/ServiceAnalysis/SSMContacts/Properties/AssemblyInfo.cs
@@ -28,5 +28,5 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.300.84")]
\ No newline at end of file
+[assembly: AssemblyVersion("4.0")]
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/code-analysis/ServiceAnalysis/SSMIncidents/Properties/AssemblyInfo.cs b/sdk/code-analysis/ServiceAnalysis/SSMIncidents/Properties/AssemblyInfo.cs
index a14791dda026..af7a02a1b803 100644
--- a/sdk/code-analysis/ServiceAnalysis/SSMIncidents/Properties/AssemblyInfo.cs
+++ b/sdk/code-analysis/ServiceAnalysis/SSMIncidents/Properties/AssemblyInfo.cs
@@ -28,5 +28,5 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.301.80")]
\ No newline at end of file
+[assembly: AssemblyVersion("4.0")]
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/code-analysis/ServiceAnalysis/SSO/Properties/AssemblyInfo.cs b/sdk/code-analysis/ServiceAnalysis/SSO/Properties/AssemblyInfo.cs
index 95ad7f92ae83..872ded8c3903 100644
--- a/sdk/code-analysis/ServiceAnalysis/SSO/Properties/AssemblyInfo.cs
+++ b/sdk/code-analysis/ServiceAnalysis/SSO/Properties/AssemblyInfo.cs
@@ -28,5 +28,5 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.300.84")]
\ No newline at end of file
+[assembly: AssemblyVersion("4.0")]
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/code-analysis/ServiceAnalysis/SSOAdmin/Properties/AssemblyInfo.cs b/sdk/code-analysis/ServiceAnalysis/SSOAdmin/Properties/AssemblyInfo.cs
index c7897a710f62..609bce75fa58 100644
--- a/sdk/code-analysis/ServiceAnalysis/SSOAdmin/Properties/AssemblyInfo.cs
+++ b/sdk/code-analysis/ServiceAnalysis/SSOAdmin/Properties/AssemblyInfo.cs
@@ -28,5 +28,5 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.302.79")]
\ No newline at end of file
+[assembly: AssemblyVersion("4.0")]
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/code-analysis/ServiceAnalysis/SSOOIDC/Properties/AssemblyInfo.cs b/sdk/code-analysis/ServiceAnalysis/SSOOIDC/Properties/AssemblyInfo.cs
index 7cf3659a06fa..797840ee6390 100644
--- a/sdk/code-analysis/ServiceAnalysis/SSOOIDC/Properties/AssemblyInfo.cs
+++ b/sdk/code-analysis/ServiceAnalysis/SSOOIDC/Properties/AssemblyInfo.cs
@@ -28,5 +28,5 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.301.79")]
\ No newline at end of file
+[assembly: AssemblyVersion("4.0")]
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/code-analysis/ServiceAnalysis/SageMaker/Properties/AssemblyInfo.cs b/sdk/code-analysis/ServiceAnalysis/SageMaker/Properties/AssemblyInfo.cs
index 0ffd6bf7c07d..b25733c69f21 100644
--- a/sdk/code-analysis/ServiceAnalysis/SageMaker/Properties/AssemblyInfo.cs
+++ b/sdk/code-analysis/ServiceAnalysis/SageMaker/Properties/AssemblyInfo.cs
@@ -28,5 +28,5 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.320.0")]
\ No newline at end of file
+[assembly: AssemblyVersion("4.0")]
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/code-analysis/ServiceAnalysis/SageMakerFeatureStoreRuntime/Properties/AssemblyInfo.cs b/sdk/code-analysis/ServiceAnalysis/SageMakerFeatureStoreRuntime/Properties/AssemblyInfo.cs
index 8bd168d282bc..238ed03a8939 100644
--- a/sdk/code-analysis/ServiceAnalysis/SageMakerFeatureStoreRuntime/Properties/AssemblyInfo.cs
+++ b/sdk/code-analysis/ServiceAnalysis/SageMakerFeatureStoreRuntime/Properties/AssemblyInfo.cs
@@ -28,5 +28,5 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.301.46")]
\ No newline at end of file
+[assembly: AssemblyVersion("4.0")]
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/code-analysis/ServiceAnalysis/SageMakerGeospatial/Properties/AssemblyInfo.cs b/sdk/code-analysis/ServiceAnalysis/SageMakerGeospatial/Properties/AssemblyInfo.cs
index d3dcfab33836..d80373faaa1a 100644
--- a/sdk/code-analysis/ServiceAnalysis/SageMakerGeospatial/Properties/AssemblyInfo.cs
+++ b/sdk/code-analysis/ServiceAnalysis/SageMakerGeospatial/Properties/AssemblyInfo.cs
@@ -28,5 +28,5 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.300.84")]
\ No newline at end of file
+[assembly: AssemblyVersion("4.0")]
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/code-analysis/ServiceAnalysis/SageMakerMetrics/Properties/AssemblyInfo.cs b/sdk/code-analysis/ServiceAnalysis/SageMakerMetrics/Properties/AssemblyInfo.cs
index 9fd5ba090bd1..ffb1d0d6430b 100644
--- a/sdk/code-analysis/ServiceAnalysis/SageMakerMetrics/Properties/AssemblyInfo.cs
+++ b/sdk/code-analysis/ServiceAnalysis/SageMakerMetrics/Properties/AssemblyInfo.cs
@@ -28,5 +28,5 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.300.84")]
\ No newline at end of file
+[assembly: AssemblyVersion("4.0")]
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/code-analysis/ServiceAnalysis/SageMakerRuntime/Properties/AssemblyInfo.cs b/sdk/code-analysis/ServiceAnalysis/SageMakerRuntime/Properties/AssemblyInfo.cs
index 9a497f32a3d3..dc258f0f2a81 100644
--- a/sdk/code-analysis/ServiceAnalysis/SageMakerRuntime/Properties/AssemblyInfo.cs
+++ b/sdk/code-analysis/ServiceAnalysis/SageMakerRuntime/Properties/AssemblyInfo.cs
@@ -28,5 +28,5 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.301.73")]
\ No newline at end of file
+[assembly: AssemblyVersion("4.0")]
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/code-analysis/ServiceAnalysis/SagemakerEdgeManager/Properties/AssemblyInfo.cs b/sdk/code-analysis/ServiceAnalysis/SagemakerEdgeManager/Properties/AssemblyInfo.cs
index 4556d0e9c65b..ff042325b86d 100644
--- a/sdk/code-analysis/ServiceAnalysis/SagemakerEdgeManager/Properties/AssemblyInfo.cs
+++ b/sdk/code-analysis/ServiceAnalysis/SagemakerEdgeManager/Properties/AssemblyInfo.cs
@@ -28,5 +28,5 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.300.84")]
\ No newline at end of file
+[assembly: AssemblyVersion("4.0")]
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/code-analysis/ServiceAnalysis/SavingsPlans/Properties/AssemblyInfo.cs b/sdk/code-analysis/ServiceAnalysis/SavingsPlans/Properties/AssemblyInfo.cs
index c1093968b1df..4ab17d27183f 100644
--- a/sdk/code-analysis/ServiceAnalysis/SavingsPlans/Properties/AssemblyInfo.cs
+++ b/sdk/code-analysis/ServiceAnalysis/SavingsPlans/Properties/AssemblyInfo.cs
@@ -28,5 +28,5 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.301.25")]
\ No newline at end of file
+[assembly: AssemblyVersion("4.0")]
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/code-analysis/ServiceAnalysis/Scheduler/Properties/AssemblyInfo.cs b/sdk/code-analysis/ServiceAnalysis/Scheduler/Properties/AssemblyInfo.cs
index a955695edb1d..9a57ec5776ad 100644
--- a/sdk/code-analysis/ServiceAnalysis/Scheduler/Properties/AssemblyInfo.cs
+++ b/sdk/code-analysis/ServiceAnalysis/Scheduler/Properties/AssemblyInfo.cs
@@ -28,5 +28,5 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.300.84")]
\ No newline at end of file
+[assembly: AssemblyVersion("4.0")]
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/code-analysis/ServiceAnalysis/Schemas/Properties/AssemblyInfo.cs b/sdk/code-analysis/ServiceAnalysis/Schemas/Properties/AssemblyInfo.cs
index dadbfbc9ff1e..4d9888038212 100644
--- a/sdk/code-analysis/ServiceAnalysis/Schemas/Properties/AssemblyInfo.cs
+++ b/sdk/code-analysis/ServiceAnalysis/Schemas/Properties/AssemblyInfo.cs
@@ -28,5 +28,5 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.300.84")]
\ No newline at end of file
+[assembly: AssemblyVersion("4.0")]
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/code-analysis/ServiceAnalysis/SecretsManager/Properties/AssemblyInfo.cs b/sdk/code-analysis/ServiceAnalysis/SecretsManager/Properties/AssemblyInfo.cs
index cb651eeebd22..8aae7cda3fde 100644
--- a/sdk/code-analysis/ServiceAnalysis/SecretsManager/Properties/AssemblyInfo.cs
+++ b/sdk/code-analysis/ServiceAnalysis/SecretsManager/Properties/AssemblyInfo.cs
@@ -28,5 +28,5 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.302.59")]
\ No newline at end of file
+[assembly: AssemblyVersion("4.0")]
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/code-analysis/ServiceAnalysis/SecurityHub/Properties/AssemblyInfo.cs b/sdk/code-analysis/ServiceAnalysis/SecurityHub/Properties/AssemblyInfo.cs
index b7e89ba0341e..90d73f8d0269 100644
--- a/sdk/code-analysis/ServiceAnalysis/SecurityHub/Properties/AssemblyInfo.cs
+++ b/sdk/code-analysis/ServiceAnalysis/SecurityHub/Properties/AssemblyInfo.cs
@@ -28,5 +28,5 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.304.24")]
\ No newline at end of file
+[assembly: AssemblyVersion("4.0")]
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/code-analysis/ServiceAnalysis/SecurityLake/Properties/AssemblyInfo.cs b/sdk/code-analysis/ServiceAnalysis/SecurityLake/Properties/AssemblyInfo.cs
index a6d83278384a..da159b859ab1 100644
--- a/sdk/code-analysis/ServiceAnalysis/SecurityLake/Properties/AssemblyInfo.cs
+++ b/sdk/code-analysis/ServiceAnalysis/SecurityLake/Properties/AssemblyInfo.cs
@@ -28,5 +28,5 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.301.30")]
\ No newline at end of file
+[assembly: AssemblyVersion("4.0")]
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/code-analysis/ServiceAnalysis/SecurityToken/Properties/AssemblyInfo.cs b/sdk/code-analysis/ServiceAnalysis/SecurityToken/Properties/AssemblyInfo.cs
index 0c31c85cb91c..ad0795de42dd 100644
--- a/sdk/code-analysis/ServiceAnalysis/SecurityToken/Properties/AssemblyInfo.cs
+++ b/sdk/code-analysis/ServiceAnalysis/SecurityToken/Properties/AssemblyInfo.cs
@@ -28,5 +28,5 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.300.85")]
\ No newline at end of file
+[assembly: AssemblyVersion("4.0")]
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/code-analysis/ServiceAnalysis/ServerMigrationService/Properties/AssemblyInfo.cs b/sdk/code-analysis/ServiceAnalysis/ServerMigrationService/Properties/AssemblyInfo.cs
index dfc7ac8f1de9..adb9e93195d0 100644
--- a/sdk/code-analysis/ServiceAnalysis/ServerMigrationService/Properties/AssemblyInfo.cs
+++ b/sdk/code-analysis/ServiceAnalysis/ServerMigrationService/Properties/AssemblyInfo.cs
@@ -28,5 +28,5 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.300.84")]
\ No newline at end of file
+[assembly: AssemblyVersion("4.0")]
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/code-analysis/ServiceAnalysis/ServerlessApplicationRepository/Properties/AssemblyInfo.cs b/sdk/code-analysis/ServiceAnalysis/ServerlessApplicationRepository/Properties/AssemblyInfo.cs
index 74b658bc9984..02dd857c2c78 100644
--- a/sdk/code-analysis/ServiceAnalysis/ServerlessApplicationRepository/Properties/AssemblyInfo.cs
+++ b/sdk/code-analysis/ServiceAnalysis/ServerlessApplicationRepository/Properties/AssemblyInfo.cs
@@ -28,5 +28,5 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.300.84")]
\ No newline at end of file
+[assembly: AssemblyVersion("4.0")]
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/code-analysis/ServiceAnalysis/ServiceCatalog/Properties/AssemblyInfo.cs b/sdk/code-analysis/ServiceAnalysis/ServiceCatalog/Properties/AssemblyInfo.cs
index c633d5beee12..02b3ce3c21d9 100644
--- a/sdk/code-analysis/ServiceAnalysis/ServiceCatalog/Properties/AssemblyInfo.cs
+++ b/sdk/code-analysis/ServiceAnalysis/ServiceCatalog/Properties/AssemblyInfo.cs
@@ -28,5 +28,5 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.301.54")]
\ No newline at end of file
+[assembly: AssemblyVersion("4.0")]
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/code-analysis/ServiceAnalysis/ServiceDiscovery/Properties/AssemblyInfo.cs b/sdk/code-analysis/ServiceAnalysis/ServiceDiscovery/Properties/AssemblyInfo.cs
index e48f5c9f5980..7db7ba7bcf9d 100644
--- a/sdk/code-analysis/ServiceAnalysis/ServiceDiscovery/Properties/AssemblyInfo.cs
+++ b/sdk/code-analysis/ServiceAnalysis/ServiceDiscovery/Properties/AssemblyInfo.cs
@@ -28,5 +28,5 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.300.84")]
\ No newline at end of file
+[assembly: AssemblyVersion("4.0")]
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/code-analysis/ServiceAnalysis/ServiceQuotas/Properties/AssemblyInfo.cs b/sdk/code-analysis/ServiceAnalysis/ServiceQuotas/Properties/AssemblyInfo.cs
index 0aea091c8b8c..90c195133e99 100644
--- a/sdk/code-analysis/ServiceAnalysis/ServiceQuotas/Properties/AssemblyInfo.cs
+++ b/sdk/code-analysis/ServiceAnalysis/ServiceQuotas/Properties/AssemblyInfo.cs
@@ -28,5 +28,5 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.300.84")]
\ No newline at end of file
+[assembly: AssemblyVersion("4.0")]
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/code-analysis/ServiceAnalysis/Shield/Properties/AssemblyInfo.cs b/sdk/code-analysis/ServiceAnalysis/Shield/Properties/AssemblyInfo.cs
index f40475b3409c..7fdeb8d43f23 100644
--- a/sdk/code-analysis/ServiceAnalysis/Shield/Properties/AssemblyInfo.cs
+++ b/sdk/code-analysis/ServiceAnalysis/Shield/Properties/AssemblyInfo.cs
@@ -28,5 +28,5 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.300.84")]
\ No newline at end of file
+[assembly: AssemblyVersion("4.0")]
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/code-analysis/ServiceAnalysis/Signer/Properties/AssemblyInfo.cs b/sdk/code-analysis/ServiceAnalysis/Signer/Properties/AssemblyInfo.cs
index d6d640cb548e..42cead64ff01 100644
--- a/sdk/code-analysis/ServiceAnalysis/Signer/Properties/AssemblyInfo.cs
+++ b/sdk/code-analysis/ServiceAnalysis/Signer/Properties/AssemblyInfo.cs
@@ -28,5 +28,5 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.300.85")]
\ No newline at end of file
+[assembly: AssemblyVersion("4.0")]
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/code-analysis/ServiceAnalysis/SimSpaceWeaver/Properties/AssemblyInfo.cs b/sdk/code-analysis/ServiceAnalysis/SimSpaceWeaver/Properties/AssemblyInfo.cs
index c202292ee4b6..b259ef21978a 100644
--- a/sdk/code-analysis/ServiceAnalysis/SimSpaceWeaver/Properties/AssemblyInfo.cs
+++ b/sdk/code-analysis/ServiceAnalysis/SimSpaceWeaver/Properties/AssemblyInfo.cs
@@ -28,5 +28,5 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.300.84")]
\ No newline at end of file
+[assembly: AssemblyVersion("4.0")]
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/code-analysis/ServiceAnalysis/SimpleDB/Properties/AssemblyInfo.cs b/sdk/code-analysis/ServiceAnalysis/SimpleDB/Properties/AssemblyInfo.cs
index 0201b0f926ae..5ca7743191f0 100644
--- a/sdk/code-analysis/ServiceAnalysis/SimpleDB/Properties/AssemblyInfo.cs
+++ b/sdk/code-analysis/ServiceAnalysis/SimpleDB/Properties/AssemblyInfo.cs
@@ -28,5 +28,5 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.300.84")]
\ No newline at end of file
+[assembly: AssemblyVersion("4.0")]
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/code-analysis/ServiceAnalysis/SimpleEmail/Properties/AssemblyInfo.cs b/sdk/code-analysis/ServiceAnalysis/SimpleEmail/Properties/AssemblyInfo.cs
index cf111a892142..41713c9d0185 100644
--- a/sdk/code-analysis/ServiceAnalysis/SimpleEmail/Properties/AssemblyInfo.cs
+++ b/sdk/code-analysis/ServiceAnalysis/SimpleEmail/Properties/AssemblyInfo.cs
@@ -28,5 +28,5 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.300.84")]
\ No newline at end of file
+[assembly: AssemblyVersion("4.0")]
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/code-analysis/ServiceAnalysis/SimpleEmailV2/Properties/AssemblyInfo.cs b/sdk/code-analysis/ServiceAnalysis/SimpleEmailV2/Properties/AssemblyInfo.cs
index ab56816e7551..284a50797dfe 100644
--- a/sdk/code-analysis/ServiceAnalysis/SimpleEmailV2/Properties/AssemblyInfo.cs
+++ b/sdk/code-analysis/ServiceAnalysis/SimpleEmailV2/Properties/AssemblyInfo.cs
@@ -28,5 +28,5 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.301.30")]
\ No newline at end of file
+[assembly: AssemblyVersion("4.0")]
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/code-analysis/ServiceAnalysis/SimpleNotificationService/Properties/AssemblyInfo.cs b/sdk/code-analysis/ServiceAnalysis/SimpleNotificationService/Properties/AssemblyInfo.cs
index e720acb07f37..893a271e9651 100644
--- a/sdk/code-analysis/ServiceAnalysis/SimpleNotificationService/Properties/AssemblyInfo.cs
+++ b/sdk/code-analysis/ServiceAnalysis/SimpleNotificationService/Properties/AssemblyInfo.cs
@@ -28,5 +28,5 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.301.32")]
\ No newline at end of file
+[assembly: AssemblyVersion("4.0")]
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/code-analysis/ServiceAnalysis/SimpleSystemsManagement/Properties/AssemblyInfo.cs b/sdk/code-analysis/ServiceAnalysis/SimpleSystemsManagement/Properties/AssemblyInfo.cs
index d668b44096c2..0265b31f9768 100644
--- a/sdk/code-analysis/ServiceAnalysis/SimpleSystemsManagement/Properties/AssemblyInfo.cs
+++ b/sdk/code-analysis/ServiceAnalysis/SimpleSystemsManagement/Properties/AssemblyInfo.cs
@@ -28,5 +28,5 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.304.3")]
\ No newline at end of file
+[assembly: AssemblyVersion("4.0")]
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/code-analysis/ServiceAnalysis/SimpleWorkflow/Properties/AssemblyInfo.cs b/sdk/code-analysis/ServiceAnalysis/SimpleWorkflow/Properties/AssemblyInfo.cs
index dd8713c30e17..72cf2033df5c 100644
--- a/sdk/code-analysis/ServiceAnalysis/SimpleWorkflow/Properties/AssemblyInfo.cs
+++ b/sdk/code-analysis/ServiceAnalysis/SimpleWorkflow/Properties/AssemblyInfo.cs
@@ -28,5 +28,5 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.300.84")]
\ No newline at end of file
+[assembly: AssemblyVersion("4.0")]
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/code-analysis/ServiceAnalysis/SnowDeviceManagement/Properties/AssemblyInfo.cs b/sdk/code-analysis/ServiceAnalysis/SnowDeviceManagement/Properties/AssemblyInfo.cs
index fcf720f69033..8fae354370b7 100644
--- a/sdk/code-analysis/ServiceAnalysis/SnowDeviceManagement/Properties/AssemblyInfo.cs
+++ b/sdk/code-analysis/ServiceAnalysis/SnowDeviceManagement/Properties/AssemblyInfo.cs
@@ -28,5 +28,5 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.300.84")]
\ No newline at end of file
+[assembly: AssemblyVersion("4.0")]
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/code-analysis/ServiceAnalysis/Snowball/Properties/AssemblyInfo.cs b/sdk/code-analysis/ServiceAnalysis/Snowball/Properties/AssemblyInfo.cs
index 09c34a51a9ef..53897638dc1d 100644
--- a/sdk/code-analysis/ServiceAnalysis/Snowball/Properties/AssemblyInfo.cs
+++ b/sdk/code-analysis/ServiceAnalysis/Snowball/Properties/AssemblyInfo.cs
@@ -28,5 +28,5 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.300.85")]
\ No newline at end of file
+[assembly: AssemblyVersion("4.0")]
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/code-analysis/ServiceAnalysis/SsmSap/Properties/AssemblyInfo.cs b/sdk/code-analysis/ServiceAnalysis/SsmSap/Properties/AssemblyInfo.cs
index 596b658b8c0e..f990c9d58d79 100644
--- a/sdk/code-analysis/ServiceAnalysis/SsmSap/Properties/AssemblyInfo.cs
+++ b/sdk/code-analysis/ServiceAnalysis/SsmSap/Properties/AssemblyInfo.cs
@@ -28,5 +28,5 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.301.81")]
\ No newline at end of file
+[assembly: AssemblyVersion("4.0")]
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/code-analysis/ServiceAnalysis/StepFunctions/Properties/AssemblyInfo.cs b/sdk/code-analysis/ServiceAnalysis/StepFunctions/Properties/AssemblyInfo.cs
index dbafb20a7a24..2699d3349de2 100644
--- a/sdk/code-analysis/ServiceAnalysis/StepFunctions/Properties/AssemblyInfo.cs
+++ b/sdk/code-analysis/ServiceAnalysis/StepFunctions/Properties/AssemblyInfo.cs
@@ -28,5 +28,5 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.303.2")]
\ No newline at end of file
+[assembly: AssemblyVersion("4.0")]
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/code-analysis/ServiceAnalysis/StorageGateway/Properties/AssemblyInfo.cs b/sdk/code-analysis/ServiceAnalysis/StorageGateway/Properties/AssemblyInfo.cs
index 58d78abc06de..21b5c856b8fd 100644
--- a/sdk/code-analysis/ServiceAnalysis/StorageGateway/Properties/AssemblyInfo.cs
+++ b/sdk/code-analysis/ServiceAnalysis/StorageGateway/Properties/AssemblyInfo.cs
@@ -28,5 +28,5 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.301.44")]
\ No newline at end of file
+[assembly: AssemblyVersion("4.0")]
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/code-analysis/ServiceAnalysis/SupplyChain/Properties/AssemblyInfo.cs b/sdk/code-analysis/ServiceAnalysis/SupplyChain/Properties/AssemblyInfo.cs
index 6edb45445ec9..e89cb5ef81e7 100644
--- a/sdk/code-analysis/ServiceAnalysis/SupplyChain/Properties/AssemblyInfo.cs
+++ b/sdk/code-analysis/ServiceAnalysis/SupplyChain/Properties/AssemblyInfo.cs
@@ -28,5 +28,5 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.301.11")]
\ No newline at end of file
+[assembly: AssemblyVersion("4.0")]
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/code-analysis/ServiceAnalysis/SupportApp/Properties/AssemblyInfo.cs b/sdk/code-analysis/ServiceAnalysis/SupportApp/Properties/AssemblyInfo.cs
index 7f6a13f4ea9e..5e2c12d83278 100644
--- a/sdk/code-analysis/ServiceAnalysis/SupportApp/Properties/AssemblyInfo.cs
+++ b/sdk/code-analysis/ServiceAnalysis/SupportApp/Properties/AssemblyInfo.cs
@@ -28,5 +28,5 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.300.84")]
\ No newline at end of file
+[assembly: AssemblyVersion("4.0")]
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/code-analysis/ServiceAnalysis/Synthetics/Properties/AssemblyInfo.cs b/sdk/code-analysis/ServiceAnalysis/Synthetics/Properties/AssemblyInfo.cs
index 6d97a30b1726..f73bdbb3a449 100644
--- a/sdk/code-analysis/ServiceAnalysis/Synthetics/Properties/AssemblyInfo.cs
+++ b/sdk/code-analysis/ServiceAnalysis/Synthetics/Properties/AssemblyInfo.cs
@@ -28,5 +28,5 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.300.84")]
\ No newline at end of file
+[assembly: AssemblyVersion("4.0")]
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/code-analysis/ServiceAnalysis/Textract/Properties/AssemblyInfo.cs b/sdk/code-analysis/ServiceAnalysis/Textract/Properties/AssemblyInfo.cs
index 8df547c028fb..729aa2539ce9 100644
--- a/sdk/code-analysis/ServiceAnalysis/Textract/Properties/AssemblyInfo.cs
+++ b/sdk/code-analysis/ServiceAnalysis/Textract/Properties/AssemblyInfo.cs
@@ -28,5 +28,5 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.300.84")]
\ No newline at end of file
+[assembly: AssemblyVersion("4.0")]
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/code-analysis/ServiceAnalysis/TimestreamInfluxDB/Properties/AssemblyInfo.cs b/sdk/code-analysis/ServiceAnalysis/TimestreamInfluxDB/Properties/AssemblyInfo.cs
index ba892a23d879..ed1af856f166 100644
--- a/sdk/code-analysis/ServiceAnalysis/TimestreamInfluxDB/Properties/AssemblyInfo.cs
+++ b/sdk/code-analysis/ServiceAnalysis/TimestreamInfluxDB/Properties/AssemblyInfo.cs
@@ -28,5 +28,5 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.300.27")]
\ No newline at end of file
+[assembly: AssemblyVersion("4.0")]
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/code-analysis/ServiceAnalysis/TimestreamQuery/Properties/AssemblyInfo.cs b/sdk/code-analysis/ServiceAnalysis/TimestreamQuery/Properties/AssemblyInfo.cs
index 9c3ca87af1b4..3fc32ddaf1ce 100644
--- a/sdk/code-analysis/ServiceAnalysis/TimestreamQuery/Properties/AssemblyInfo.cs
+++ b/sdk/code-analysis/ServiceAnalysis/TimestreamQuery/Properties/AssemblyInfo.cs
@@ -28,5 +28,5 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.301.0")]
\ No newline at end of file
+[assembly: AssemblyVersion("4.0")]
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/code-analysis/ServiceAnalysis/TimestreamWrite/Properties/AssemblyInfo.cs b/sdk/code-analysis/ServiceAnalysis/TimestreamWrite/Properties/AssemblyInfo.cs
index 721b8c14e717..22cd7f4cbf69 100644
--- a/sdk/code-analysis/ServiceAnalysis/TimestreamWrite/Properties/AssemblyInfo.cs
+++ b/sdk/code-analysis/ServiceAnalysis/TimestreamWrite/Properties/AssemblyInfo.cs
@@ -28,5 +28,5 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.300.84")]
\ No newline at end of file
+[assembly: AssemblyVersion("4.0")]
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/code-analysis/ServiceAnalysis/Tnb/Properties/AssemblyInfo.cs b/sdk/code-analysis/ServiceAnalysis/Tnb/Properties/AssemblyInfo.cs
index bdd3d62019da..80e91425345e 100644
--- a/sdk/code-analysis/ServiceAnalysis/Tnb/Properties/AssemblyInfo.cs
+++ b/sdk/code-analysis/ServiceAnalysis/Tnb/Properties/AssemblyInfo.cs
@@ -28,5 +28,5 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.300.84")]
\ No newline at end of file
+[assembly: AssemblyVersion("4.0")]
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/code-analysis/ServiceAnalysis/TranscribeService/Properties/AssemblyInfo.cs b/sdk/code-analysis/ServiceAnalysis/TranscribeService/Properties/AssemblyInfo.cs
index 0ae495ecfff4..9caf591e2e56 100644
--- a/sdk/code-analysis/ServiceAnalysis/TranscribeService/Properties/AssemblyInfo.cs
+++ b/sdk/code-analysis/ServiceAnalysis/TranscribeService/Properties/AssemblyInfo.cs
@@ -28,5 +28,5 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.303.0")]
\ No newline at end of file
+[assembly: AssemblyVersion("4.0")]
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/code-analysis/ServiceAnalysis/Transfer/Properties/AssemblyInfo.cs b/sdk/code-analysis/ServiceAnalysis/Transfer/Properties/AssemblyInfo.cs
index ca36db2c83ec..57b54445d702 100644
--- a/sdk/code-analysis/ServiceAnalysis/Transfer/Properties/AssemblyInfo.cs
+++ b/sdk/code-analysis/ServiceAnalysis/Transfer/Properties/AssemblyInfo.cs
@@ -28,5 +28,5 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.306.5")]
\ No newline at end of file
+[assembly: AssemblyVersion("4.0")]
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/code-analysis/ServiceAnalysis/Translate/Properties/AssemblyInfo.cs b/sdk/code-analysis/ServiceAnalysis/Translate/Properties/AssemblyInfo.cs
index fb386f470659..e64d4dc3c1b1 100644
--- a/sdk/code-analysis/ServiceAnalysis/Translate/Properties/AssemblyInfo.cs
+++ b/sdk/code-analysis/ServiceAnalysis/Translate/Properties/AssemblyInfo.cs
@@ -28,5 +28,5 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.300.84")]
\ No newline at end of file
+[assembly: AssemblyVersion("4.0")]
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/code-analysis/ServiceAnalysis/TrustedAdvisor/Properties/AssemblyInfo.cs b/sdk/code-analysis/ServiceAnalysis/TrustedAdvisor/Properties/AssemblyInfo.cs
index 43789ad7cf60..a05569a62cc7 100644
--- a/sdk/code-analysis/ServiceAnalysis/TrustedAdvisor/Properties/AssemblyInfo.cs
+++ b/sdk/code-analysis/ServiceAnalysis/TrustedAdvisor/Properties/AssemblyInfo.cs
@@ -28,5 +28,5 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.301.0")]
\ No newline at end of file
+[assembly: AssemblyVersion("4.0")]
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/code-analysis/ServiceAnalysis/VPCLattice/Properties/AssemblyInfo.cs b/sdk/code-analysis/ServiceAnalysis/VPCLattice/Properties/AssemblyInfo.cs
index 5194081a2f10..c66bb57f2008 100644
--- a/sdk/code-analysis/ServiceAnalysis/VPCLattice/Properties/AssemblyInfo.cs
+++ b/sdk/code-analysis/ServiceAnalysis/VPCLattice/Properties/AssemblyInfo.cs
@@ -28,5 +28,5 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.300.84")]
\ No newline at end of file
+[assembly: AssemblyVersion("4.0")]
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/code-analysis/ServiceAnalysis/VerifiedPermissions/Properties/AssemblyInfo.cs b/sdk/code-analysis/ServiceAnalysis/VerifiedPermissions/Properties/AssemblyInfo.cs
index cbbfd09c6f97..3038e57faf96 100644
--- a/sdk/code-analysis/ServiceAnalysis/VerifiedPermissions/Properties/AssemblyInfo.cs
+++ b/sdk/code-analysis/ServiceAnalysis/VerifiedPermissions/Properties/AssemblyInfo.cs
@@ -28,5 +28,5 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.305.14")]
\ No newline at end of file
+[assembly: AssemblyVersion("4.0")]
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/code-analysis/ServiceAnalysis/VoiceID/Properties/AssemblyInfo.cs b/sdk/code-analysis/ServiceAnalysis/VoiceID/Properties/AssemblyInfo.cs
index 6d06480f7f7a..3e8e9442dfe8 100644
--- a/sdk/code-analysis/ServiceAnalysis/VoiceID/Properties/AssemblyInfo.cs
+++ b/sdk/code-analysis/ServiceAnalysis/VoiceID/Properties/AssemblyInfo.cs
@@ -28,5 +28,5 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.300.84")]
\ No newline at end of file
+[assembly: AssemblyVersion("4.0")]
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/code-analysis/ServiceAnalysis/WAF/Properties/AssemblyInfo.cs b/sdk/code-analysis/ServiceAnalysis/WAF/Properties/AssemblyInfo.cs
index 5cef636755d1..4a8b9ec9d2ea 100644
--- a/sdk/code-analysis/ServiceAnalysis/WAF/Properties/AssemblyInfo.cs
+++ b/sdk/code-analysis/ServiceAnalysis/WAF/Properties/AssemblyInfo.cs
@@ -28,5 +28,5 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.300.84")]
\ No newline at end of file
+[assembly: AssemblyVersion("4.0")]
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/code-analysis/ServiceAnalysis/WAFRegional/Properties/AssemblyInfo.cs b/sdk/code-analysis/ServiceAnalysis/WAFRegional/Properties/AssemblyInfo.cs
index 1d606acd3f57..b394525d77c5 100644
--- a/sdk/code-analysis/ServiceAnalysis/WAFRegional/Properties/AssemblyInfo.cs
+++ b/sdk/code-analysis/ServiceAnalysis/WAFRegional/Properties/AssemblyInfo.cs
@@ -28,5 +28,5 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.300.84")]
\ No newline at end of file
+[assembly: AssemblyVersion("4.0")]
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/code-analysis/ServiceAnalysis/WAFV2/Properties/AssemblyInfo.cs b/sdk/code-analysis/ServiceAnalysis/WAFV2/Properties/AssemblyInfo.cs
index 481cf533b692..7d822d165756 100644
--- a/sdk/code-analysis/ServiceAnalysis/WAFV2/Properties/AssemblyInfo.cs
+++ b/sdk/code-analysis/ServiceAnalysis/WAFV2/Properties/AssemblyInfo.cs
@@ -28,5 +28,5 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.304.10")]
\ No newline at end of file
+[assembly: AssemblyVersion("4.0")]
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/code-analysis/ServiceAnalysis/WellArchitected/Properties/AssemblyInfo.cs b/sdk/code-analysis/ServiceAnalysis/WellArchitected/Properties/AssemblyInfo.cs
index f3a255ffd9b4..b7cfac9911c6 100644
--- a/sdk/code-analysis/ServiceAnalysis/WellArchitected/Properties/AssemblyInfo.cs
+++ b/sdk/code-analysis/ServiceAnalysis/WellArchitected/Properties/AssemblyInfo.cs
@@ -28,5 +28,5 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.301.9")]
\ No newline at end of file
+[assembly: AssemblyVersion("4.0")]
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/code-analysis/ServiceAnalysis/WorkDocs/Properties/AssemblyInfo.cs b/sdk/code-analysis/ServiceAnalysis/WorkDocs/Properties/AssemblyInfo.cs
index 6e82917a3b3d..6c07217f9462 100644
--- a/sdk/code-analysis/ServiceAnalysis/WorkDocs/Properties/AssemblyInfo.cs
+++ b/sdk/code-analysis/ServiceAnalysis/WorkDocs/Properties/AssemblyInfo.cs
@@ -28,5 +28,5 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.300.84")]
\ No newline at end of file
+[assembly: AssemblyVersion("4.0")]
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/code-analysis/ServiceAnalysis/WorkLink/Properties/AssemblyInfo.cs b/sdk/code-analysis/ServiceAnalysis/WorkLink/Properties/AssemblyInfo.cs
index 201986718047..0769c85b0050 100644
--- a/sdk/code-analysis/ServiceAnalysis/WorkLink/Properties/AssemblyInfo.cs
+++ b/sdk/code-analysis/ServiceAnalysis/WorkLink/Properties/AssemblyInfo.cs
@@ -28,5 +28,5 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.300.84")]
\ No newline at end of file
+[assembly: AssemblyVersion("4.0")]
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/code-analysis/ServiceAnalysis/WorkMail/Properties/AssemblyInfo.cs b/sdk/code-analysis/ServiceAnalysis/WorkMail/Properties/AssemblyInfo.cs
index 5bf240cb2873..8ee187a23b26 100644
--- a/sdk/code-analysis/ServiceAnalysis/WorkMail/Properties/AssemblyInfo.cs
+++ b/sdk/code-analysis/ServiceAnalysis/WorkMail/Properties/AssemblyInfo.cs
@@ -28,5 +28,5 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.300.84")]
\ No newline at end of file
+[assembly: AssemblyVersion("4.0")]
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/code-analysis/ServiceAnalysis/WorkMailMessageFlow/Properties/AssemblyInfo.cs b/sdk/code-analysis/ServiceAnalysis/WorkMailMessageFlow/Properties/AssemblyInfo.cs
index 8b059a1e0018..b3eef0091991 100644
--- a/sdk/code-analysis/ServiceAnalysis/WorkMailMessageFlow/Properties/AssemblyInfo.cs
+++ b/sdk/code-analysis/ServiceAnalysis/WorkMailMessageFlow/Properties/AssemblyInfo.cs
@@ -28,5 +28,5 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.300.84")]
\ No newline at end of file
+[assembly: AssemblyVersion("4.0")]
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/code-analysis/ServiceAnalysis/WorkSpaces/Properties/AssemblyInfo.cs b/sdk/code-analysis/ServiceAnalysis/WorkSpaces/Properties/AssemblyInfo.cs
index ba4810f1dc99..090dd9693eef 100644
--- a/sdk/code-analysis/ServiceAnalysis/WorkSpaces/Properties/AssemblyInfo.cs
+++ b/sdk/code-analysis/ServiceAnalysis/WorkSpaces/Properties/AssemblyInfo.cs
@@ -28,5 +28,5 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.303.7")]
\ No newline at end of file
+[assembly: AssemblyVersion("4.0")]
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/code-analysis/ServiceAnalysis/WorkSpacesThinClient/Properties/AssemblyInfo.cs b/sdk/code-analysis/ServiceAnalysis/WorkSpacesThinClient/Properties/AssemblyInfo.cs
index ca0d1ed54b95..7ee10100c7c3 100644
--- a/sdk/code-analysis/ServiceAnalysis/WorkSpacesThinClient/Properties/AssemblyInfo.cs
+++ b/sdk/code-analysis/ServiceAnalysis/WorkSpacesThinClient/Properties/AssemblyInfo.cs
@@ -28,5 +28,5 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.302.11")]
\ No newline at end of file
+[assembly: AssemblyVersion("4.0")]
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/code-analysis/ServiceAnalysis/WorkSpacesWeb/Properties/AssemblyInfo.cs b/sdk/code-analysis/ServiceAnalysis/WorkSpacesWeb/Properties/AssemblyInfo.cs
index 287a5a4b4995..8123a0e3d362 100644
--- a/sdk/code-analysis/ServiceAnalysis/WorkSpacesWeb/Properties/AssemblyInfo.cs
+++ b/sdk/code-analysis/ServiceAnalysis/WorkSpacesWeb/Properties/AssemblyInfo.cs
@@ -28,5 +28,5 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.301.4")]
\ No newline at end of file
+[assembly: AssemblyVersion("4.0")]
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/code-analysis/ServiceAnalysis/XRay/Properties/AssemblyInfo.cs b/sdk/code-analysis/ServiceAnalysis/XRay/Properties/AssemblyInfo.cs
index 72b2862cbbce..4eee121defd3 100644
--- a/sdk/code-analysis/ServiceAnalysis/XRay/Properties/AssemblyInfo.cs
+++ b/sdk/code-analysis/ServiceAnalysis/XRay/Properties/AssemblyInfo.cs
@@ -28,5 +28,5 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.300.84")]
\ No newline at end of file
+[assembly: AssemblyVersion("4.0")]
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/src/Core/AWSSDK.Core.NetFramework.csproj b/sdk/src/Core/AWSSDK.Core.NetFramework.csproj
index ce99897938c4..3d740253846d 100644
--- a/sdk/src/Core/AWSSDK.Core.NetFramework.csproj
+++ b/sdk/src/Core/AWSSDK.Core.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
     <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>DEBUG;TRACE;BCL;AWS_ASYNC_API;CODE_ANALYSIS</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -17,6 +17,7 @@
     <GenerateAssemblyFileVersionAttribute>false</GenerateAssemblyFileVersionAttribute>
     <GenerateAssemblyDescriptionAttribute>false</GenerateAssemblyDescriptionAttribute>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>$(NoWarn);CS1591</NoWarn>
 
     <SignAssembly>True</SignAssembly>
diff --git a/sdk/src/Core/Amazon.Util/Internal/InternalSDKUtils.generated.cs b/sdk/src/Core/Amazon.Util/Internal/InternalSDKUtils.generated.cs
index ce78a34c3e6a..1ef5e7776d17 100644
--- a/sdk/src/Core/Amazon.Util/Internal/InternalSDKUtils.generated.cs
+++ b/sdk/src/Core/Amazon.Util/Internal/InternalSDKUtils.generated.cs
@@ -29,6 +29,6 @@ namespace Amazon.Util.Internal
 {
     public static partial class InternalSDKUtils
     {
-        internal const string CoreVersionNumber = "3.7.303.24";
+        internal const string CoreVersionNumber = "4.0.0.0";
     }
 }
\ No newline at end of file
diff --git a/sdk/src/Core/Properties/AssemblyInfo.cs b/sdk/src/Core/Properties/AssemblyInfo.cs
index e6269843ed4b..7b511ce2bb7f 100644
--- a/sdk/src/Core/Properties/AssemblyInfo.cs
+++ b/sdk/src/Core/Properties/AssemblyInfo.cs
@@ -46,8 +46,12 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.303.24")]
+#if BCL
+[assembly: AssemblyVersion("4.0")]
+#else
+[assembly: AssemblyVersion("4.0.0.0")]
+#endif
+[assembly: AssemblyFileVersion("4.0.0.0")]
 
 #if BCL
 [assembly: System.Security.AllowPartiallyTrustedCallers]
diff --git a/sdk/src/Services/ACMPCA/AWSSDK.ACMPCA.NetFramework.csproj b/sdk/src/Services/ACMPCA/AWSSDK.ACMPCA.NetFramework.csproj
index ab7b8c8c1d64..801030159219 100644
--- a/sdk/src/Services/ACMPCA/AWSSDK.ACMPCA.NetFramework.csproj
+++ b/sdk/src/Services/ACMPCA/AWSSDK.ACMPCA.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);BCL;AWS_ASYNC_API;CODE_ANALYSIS</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(RuleSetFileForBuild)' == 'false' Or '$(RuleSetFileForBuild)' == '' ">
diff --git a/sdk/src/Services/ACMPCA/AWSSDK.ACMPCA.NetStandard.csproj b/sdk/src/Services/ACMPCA/AWSSDK.ACMPCA.NetStandard.csproj
index c500fb80b1d8..21e75c5e04b3 100644
--- a/sdk/src/Services/ACMPCA/AWSSDK.ACMPCA.NetStandard.csproj
+++ b/sdk/src/Services/ACMPCA/AWSSDK.ACMPCA.NetStandard.csproj
@@ -22,6 +22,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <!-- Async Enumerable Compatibility -->
diff --git a/sdk/src/Services/ACMPCA/Generated/AmazonACMPCAConfig.cs b/sdk/src/Services/ACMPCA/Generated/AmazonACMPCAConfig.cs
index aedf81005ba3..de63b593c4f0 100644
--- a/sdk/src/Services/ACMPCA/Generated/AmazonACMPCAConfig.cs
+++ b/sdk/src/Services/ACMPCA/Generated/AmazonACMPCAConfig.cs
@@ -34,7 +34,7 @@ namespace Amazon.ACMPCA
     public partial class AmazonACMPCAConfig : ClientConfig
     {
         private static readonly string UserAgentString =
-            InternalSDKUtils.BuildUserAgentString("ACM PCA", "3.7.301.43");
+            InternalSDKUtils.BuildUserAgentString("ACM PCA", "4.0.0.0");
 
         private static readonly AmazonACMPCAEndpointResolver EndpointResolver =
             new AmazonACMPCAEndpointResolver();
diff --git a/sdk/src/Services/ACMPCA/Properties/AssemblyInfo.cs b/sdk/src/Services/ACMPCA/Properties/AssemblyInfo.cs
index 7a86510fb9a7..fa06b3bcd910 100644
--- a/sdk/src/Services/ACMPCA/Properties/AssemblyInfo.cs
+++ b/sdk/src/Services/ACMPCA/Properties/AssemblyInfo.cs
@@ -41,5 +41,9 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.301.43")]
\ No newline at end of file
+#if BCL
+[assembly: AssemblyVersion("4.0")]
+#else
+[assembly: AssemblyVersion("4.0.0.0")]
+#endif
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/src/Services/APIGateway/AWSSDK.APIGateway.NetFramework.csproj b/sdk/src/Services/APIGateway/AWSSDK.APIGateway.NetFramework.csproj
index f23f22846ca3..52b755abc96e 100644
--- a/sdk/src/Services/APIGateway/AWSSDK.APIGateway.NetFramework.csproj
+++ b/sdk/src/Services/APIGateway/AWSSDK.APIGateway.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);BCL;AWS_ASYNC_API;CODE_ANALYSIS</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(RuleSetFileForBuild)' == 'false' Or '$(RuleSetFileForBuild)' == '' ">
diff --git a/sdk/src/Services/APIGateway/AWSSDK.APIGateway.NetStandard.csproj b/sdk/src/Services/APIGateway/AWSSDK.APIGateway.NetStandard.csproj
index 43577f92f9c6..78f0f4ae2a46 100644
--- a/sdk/src/Services/APIGateway/AWSSDK.APIGateway.NetStandard.csproj
+++ b/sdk/src/Services/APIGateway/AWSSDK.APIGateway.NetStandard.csproj
@@ -22,6 +22,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <!-- Async Enumerable Compatibility -->
diff --git a/sdk/src/Services/APIGateway/Generated/AmazonAPIGatewayConfig.cs b/sdk/src/Services/APIGateway/Generated/AmazonAPIGatewayConfig.cs
index 49906cabf6c6..7507d49e1e18 100644
--- a/sdk/src/Services/APIGateway/Generated/AmazonAPIGatewayConfig.cs
+++ b/sdk/src/Services/APIGateway/Generated/AmazonAPIGatewayConfig.cs
@@ -34,7 +34,7 @@ namespace Amazon.APIGateway
     public partial class AmazonAPIGatewayConfig : ClientConfig
     {
         private static readonly string UserAgentString =
-            InternalSDKUtils.BuildUserAgentString("API Gateway", "3.7.300.86");
+            InternalSDKUtils.BuildUserAgentString("API Gateway", "4.0.0.0");
 
         private static readonly AmazonAPIGatewayEndpointResolver EndpointResolver =
             new AmazonAPIGatewayEndpointResolver();
diff --git a/sdk/src/Services/APIGateway/Properties/AssemblyInfo.cs b/sdk/src/Services/APIGateway/Properties/AssemblyInfo.cs
index 13dda5c1fa61..55b16a2b7aac 100644
--- a/sdk/src/Services/APIGateway/Properties/AssemblyInfo.cs
+++ b/sdk/src/Services/APIGateway/Properties/AssemblyInfo.cs
@@ -41,5 +41,9 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.300.86")]
\ No newline at end of file
+#if BCL
+[assembly: AssemblyVersion("4.0")]
+#else
+[assembly: AssemblyVersion("4.0.0.0")]
+#endif
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/src/Services/ARCZonalShift/AWSSDK.ARCZonalShift.NetFramework.csproj b/sdk/src/Services/ARCZonalShift/AWSSDK.ARCZonalShift.NetFramework.csproj
index a776a872b248..0be03e77b9ed 100644
--- a/sdk/src/Services/ARCZonalShift/AWSSDK.ARCZonalShift.NetFramework.csproj
+++ b/sdk/src/Services/ARCZonalShift/AWSSDK.ARCZonalShift.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);BCL;AWS_ASYNC_API;CODE_ANALYSIS</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(RuleSetFileForBuild)' == 'false' Or '$(RuleSetFileForBuild)' == '' ">
diff --git a/sdk/src/Services/ARCZonalShift/AWSSDK.ARCZonalShift.NetStandard.csproj b/sdk/src/Services/ARCZonalShift/AWSSDK.ARCZonalShift.NetStandard.csproj
index 1c153b2846f0..fa1fae1b20d2 100644
--- a/sdk/src/Services/ARCZonalShift/AWSSDK.ARCZonalShift.NetStandard.csproj
+++ b/sdk/src/Services/ARCZonalShift/AWSSDK.ARCZonalShift.NetStandard.csproj
@@ -22,6 +22,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <!-- Async Enumerable Compatibility -->
diff --git a/sdk/src/Services/ARCZonalShift/Generated/AmazonARCZonalShiftConfig.cs b/sdk/src/Services/ARCZonalShift/Generated/AmazonARCZonalShiftConfig.cs
index 96b24916a906..02700002afc4 100644
--- a/sdk/src/Services/ARCZonalShift/Generated/AmazonARCZonalShiftConfig.cs
+++ b/sdk/src/Services/ARCZonalShift/Generated/AmazonARCZonalShiftConfig.cs
@@ -34,7 +34,7 @@ namespace Amazon.ARCZonalShift
     public partial class AmazonARCZonalShiftConfig : ClientConfig
     {
         private static readonly string UserAgentString =
-            InternalSDKUtils.BuildUserAgentString("ARC Zonal Shift", "3.7.301.72");
+            InternalSDKUtils.BuildUserAgentString("ARC Zonal Shift", "4.0.0.0");
 
         private static readonly AmazonARCZonalShiftEndpointResolver EndpointResolver =
             new AmazonARCZonalShiftEndpointResolver();
diff --git a/sdk/src/Services/ARCZonalShift/Properties/AssemblyInfo.cs b/sdk/src/Services/ARCZonalShift/Properties/AssemblyInfo.cs
index 1c35385f9688..c17959ae3b4a 100644
--- a/sdk/src/Services/ARCZonalShift/Properties/AssemblyInfo.cs
+++ b/sdk/src/Services/ARCZonalShift/Properties/AssemblyInfo.cs
@@ -41,5 +41,9 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.301.72")]
\ No newline at end of file
+#if BCL
+[assembly: AssemblyVersion("4.0")]
+#else
+[assembly: AssemblyVersion("4.0.0.0")]
+#endif
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/src/Services/AWSHealth/AWSSDK.AWSHealth.NetFramework.csproj b/sdk/src/Services/AWSHealth/AWSSDK.AWSHealth.NetFramework.csproj
index 64da70b0ae35..8e65f96e6bc5 100644
--- a/sdk/src/Services/AWSHealth/AWSSDK.AWSHealth.NetFramework.csproj
+++ b/sdk/src/Services/AWSHealth/AWSSDK.AWSHealth.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);BCL;AWS_ASYNC_API;CODE_ANALYSIS</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(RuleSetFileForBuild)' == 'false' Or '$(RuleSetFileForBuild)' == '' ">
diff --git a/sdk/src/Services/AWSHealth/AWSSDK.AWSHealth.NetStandard.csproj b/sdk/src/Services/AWSHealth/AWSSDK.AWSHealth.NetStandard.csproj
index 0b9f1f718a24..40c4babd7cde 100644
--- a/sdk/src/Services/AWSHealth/AWSSDK.AWSHealth.NetStandard.csproj
+++ b/sdk/src/Services/AWSHealth/AWSSDK.AWSHealth.NetStandard.csproj
@@ -22,6 +22,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <!-- Async Enumerable Compatibility -->
diff --git a/sdk/src/Services/AWSHealth/Generated/AmazonAWSHealthConfig.cs b/sdk/src/Services/AWSHealth/Generated/AmazonAWSHealthConfig.cs
index 53282d1adf7e..48dc24a985df 100644
--- a/sdk/src/Services/AWSHealth/Generated/AmazonAWSHealthConfig.cs
+++ b/sdk/src/Services/AWSHealth/Generated/AmazonAWSHealthConfig.cs
@@ -34,7 +34,7 @@ namespace Amazon.AWSHealth
     public partial class AmazonAWSHealthConfig : ClientConfig
     {
         private static readonly string UserAgentString =
-            InternalSDKUtils.BuildUserAgentString("Health", "3.7.300.84");
+            InternalSDKUtils.BuildUserAgentString("Health", "4.0.0.0");
 
         private static readonly AmazonAWSHealthEndpointResolver EndpointResolver =
             new AmazonAWSHealthEndpointResolver();
diff --git a/sdk/src/Services/AWSHealth/Properties/AssemblyInfo.cs b/sdk/src/Services/AWSHealth/Properties/AssemblyInfo.cs
index 7989eddad59e..6703ad86e51d 100644
--- a/sdk/src/Services/AWSHealth/Properties/AssemblyInfo.cs
+++ b/sdk/src/Services/AWSHealth/Properties/AssemblyInfo.cs
@@ -41,5 +41,9 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.300.84")]
\ No newline at end of file
+#if BCL
+[assembly: AssemblyVersion("4.0")]
+#else
+[assembly: AssemblyVersion("4.0.0.0")]
+#endif
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/src/Services/AWSMarketplaceCommerceAnalytics/AWSSDK.AWSMarketplaceCommerceAnalytics.NetFramework.csproj b/sdk/src/Services/AWSMarketplaceCommerceAnalytics/AWSSDK.AWSMarketplaceCommerceAnalytics.NetFramework.csproj
index ce8c616a5fde..1d775e42e555 100644
--- a/sdk/src/Services/AWSMarketplaceCommerceAnalytics/AWSSDK.AWSMarketplaceCommerceAnalytics.NetFramework.csproj
+++ b/sdk/src/Services/AWSMarketplaceCommerceAnalytics/AWSSDK.AWSMarketplaceCommerceAnalytics.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);BCL;AWS_ASYNC_API;CODE_ANALYSIS</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(RuleSetFileForBuild)' == 'false' Or '$(RuleSetFileForBuild)' == '' ">
diff --git a/sdk/src/Services/AWSMarketplaceCommerceAnalytics/AWSSDK.AWSMarketplaceCommerceAnalytics.NetStandard.csproj b/sdk/src/Services/AWSMarketplaceCommerceAnalytics/AWSSDK.AWSMarketplaceCommerceAnalytics.NetStandard.csproj
index ea1fe58e53ba..4cc85f48f3e3 100644
--- a/sdk/src/Services/AWSMarketplaceCommerceAnalytics/AWSSDK.AWSMarketplaceCommerceAnalytics.NetStandard.csproj
+++ b/sdk/src/Services/AWSMarketplaceCommerceAnalytics/AWSSDK.AWSMarketplaceCommerceAnalytics.NetStandard.csproj
@@ -22,6 +22,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <!-- Async Enumerable Compatibility -->
diff --git a/sdk/src/Services/AWSMarketplaceCommerceAnalytics/Generated/AmazonAWSMarketplaceCommerceAnalyticsConfig.cs b/sdk/src/Services/AWSMarketplaceCommerceAnalytics/Generated/AmazonAWSMarketplaceCommerceAnalyticsConfig.cs
index 0079a6e4b5f4..a6b88558e95d 100644
--- a/sdk/src/Services/AWSMarketplaceCommerceAnalytics/Generated/AmazonAWSMarketplaceCommerceAnalyticsConfig.cs
+++ b/sdk/src/Services/AWSMarketplaceCommerceAnalytics/Generated/AmazonAWSMarketplaceCommerceAnalyticsConfig.cs
@@ -34,7 +34,7 @@ namespace Amazon.AWSMarketplaceCommerceAnalytics
     public partial class AmazonAWSMarketplaceCommerceAnalyticsConfig : ClientConfig
     {
         private static readonly string UserAgentString =
-            InternalSDKUtils.BuildUserAgentString("Marketplace Commerce Analytics", "3.7.300.84");
+            InternalSDKUtils.BuildUserAgentString("Marketplace Commerce Analytics", "4.0.0.0");
 
         private static readonly AmazonAWSMarketplaceCommerceAnalyticsEndpointResolver EndpointResolver =
             new AmazonAWSMarketplaceCommerceAnalyticsEndpointResolver();
diff --git a/sdk/src/Services/AWSMarketplaceCommerceAnalytics/Properties/AssemblyInfo.cs b/sdk/src/Services/AWSMarketplaceCommerceAnalytics/Properties/AssemblyInfo.cs
index 94b106107249..910af88a15b1 100644
--- a/sdk/src/Services/AWSMarketplaceCommerceAnalytics/Properties/AssemblyInfo.cs
+++ b/sdk/src/Services/AWSMarketplaceCommerceAnalytics/Properties/AssemblyInfo.cs
@@ -41,5 +41,9 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.300.84")]
\ No newline at end of file
+#if BCL
+[assembly: AssemblyVersion("4.0")]
+#else
+[assembly: AssemblyVersion("4.0.0.0")]
+#endif
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/src/Services/AWSMarketplaceMetering/AWSSDK.AWSMarketplaceMetering.NetFramework.csproj b/sdk/src/Services/AWSMarketplaceMetering/AWSSDK.AWSMarketplaceMetering.NetFramework.csproj
index 4c910ba45e67..bef97911125d 100644
--- a/sdk/src/Services/AWSMarketplaceMetering/AWSSDK.AWSMarketplaceMetering.NetFramework.csproj
+++ b/sdk/src/Services/AWSMarketplaceMetering/AWSSDK.AWSMarketplaceMetering.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);BCL;AWS_ASYNC_API;CODE_ANALYSIS</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(RuleSetFileForBuild)' == 'false' Or '$(RuleSetFileForBuild)' == '' ">
diff --git a/sdk/src/Services/AWSMarketplaceMetering/AWSSDK.AWSMarketplaceMetering.NetStandard.csproj b/sdk/src/Services/AWSMarketplaceMetering/AWSSDK.AWSMarketplaceMetering.NetStandard.csproj
index 4a18368f431b..4e43f1dc8fb8 100644
--- a/sdk/src/Services/AWSMarketplaceMetering/AWSSDK.AWSMarketplaceMetering.NetStandard.csproj
+++ b/sdk/src/Services/AWSMarketplaceMetering/AWSSDK.AWSMarketplaceMetering.NetStandard.csproj
@@ -22,6 +22,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <!-- Async Enumerable Compatibility -->
diff --git a/sdk/src/Services/AWSMarketplaceMetering/Generated/AmazonAWSMarketplaceMeteringConfig.cs b/sdk/src/Services/AWSMarketplaceMetering/Generated/AmazonAWSMarketplaceMeteringConfig.cs
index 920a391e4532..a962550a4044 100644
--- a/sdk/src/Services/AWSMarketplaceMetering/Generated/AmazonAWSMarketplaceMeteringConfig.cs
+++ b/sdk/src/Services/AWSMarketplaceMetering/Generated/AmazonAWSMarketplaceMeteringConfig.cs
@@ -34,7 +34,7 @@ namespace Amazon.AWSMarketplaceMetering
     public partial class AmazonAWSMarketplaceMeteringConfig : ClientConfig
     {
         private static readonly string UserAgentString =
-            InternalSDKUtils.BuildUserAgentString("Marketplace Metering", "3.7.300.84");
+            InternalSDKUtils.BuildUserAgentString("Marketplace Metering", "4.0.0.0");
 
         private static readonly AmazonAWSMarketplaceMeteringEndpointResolver EndpointResolver =
             new AmazonAWSMarketplaceMeteringEndpointResolver();
diff --git a/sdk/src/Services/AWSMarketplaceMetering/Properties/AssemblyInfo.cs b/sdk/src/Services/AWSMarketplaceMetering/Properties/AssemblyInfo.cs
index a8ed73748ce4..ad4f610bba59 100644
--- a/sdk/src/Services/AWSMarketplaceMetering/Properties/AssemblyInfo.cs
+++ b/sdk/src/Services/AWSMarketplaceMetering/Properties/AssemblyInfo.cs
@@ -41,5 +41,9 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.300.84")]
\ No newline at end of file
+#if BCL
+[assembly: AssemblyVersion("4.0")]
+#else
+[assembly: AssemblyVersion("4.0.0.0")]
+#endif
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/src/Services/AWSSupport/AWSSDK.AWSSupport.NetFramework.csproj b/sdk/src/Services/AWSSupport/AWSSDK.AWSSupport.NetFramework.csproj
index 8575ff278f20..dd99d578160d 100644
--- a/sdk/src/Services/AWSSupport/AWSSDK.AWSSupport.NetFramework.csproj
+++ b/sdk/src/Services/AWSSupport/AWSSDK.AWSSupport.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);BCL;AWS_ASYNC_API;CODE_ANALYSIS</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(RuleSetFileForBuild)' == 'false' Or '$(RuleSetFileForBuild)' == '' ">
diff --git a/sdk/src/Services/AWSSupport/AWSSDK.AWSSupport.NetStandard.csproj b/sdk/src/Services/AWSSupport/AWSSDK.AWSSupport.NetStandard.csproj
index 0617d64f41fe..9dc4da1fae34 100644
--- a/sdk/src/Services/AWSSupport/AWSSDK.AWSSupport.NetStandard.csproj
+++ b/sdk/src/Services/AWSSupport/AWSSDK.AWSSupport.NetStandard.csproj
@@ -22,6 +22,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <!-- Async Enumerable Compatibility -->
diff --git a/sdk/src/Services/AWSSupport/Generated/AmazonAWSSupportConfig.cs b/sdk/src/Services/AWSSupport/Generated/AmazonAWSSupportConfig.cs
index a96976a6b05a..8957dd709aec 100644
--- a/sdk/src/Services/AWSSupport/Generated/AmazonAWSSupportConfig.cs
+++ b/sdk/src/Services/AWSSupport/Generated/AmazonAWSSupportConfig.cs
@@ -34,7 +34,7 @@ namespace Amazon.AWSSupport
     public partial class AmazonAWSSupportConfig : ClientConfig
     {
         private static readonly string UserAgentString =
-            InternalSDKUtils.BuildUserAgentString("Support", "3.7.301.1");
+            InternalSDKUtils.BuildUserAgentString("Support", "4.0.0.0");
 
         private static readonly AmazonAWSSupportEndpointResolver EndpointResolver =
             new AmazonAWSSupportEndpointResolver();
diff --git a/sdk/src/Services/AWSSupport/Properties/AssemblyInfo.cs b/sdk/src/Services/AWSSupport/Properties/AssemblyInfo.cs
index c17dd0cf1d3e..cefac6e32318 100644
--- a/sdk/src/Services/AWSSupport/Properties/AssemblyInfo.cs
+++ b/sdk/src/Services/AWSSupport/Properties/AssemblyInfo.cs
@@ -41,5 +41,9 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.301.1")]
\ No newline at end of file
+#if BCL
+[assembly: AssemblyVersion("4.0")]
+#else
+[assembly: AssemblyVersion("4.0.0.0")]
+#endif
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/src/Services/AccessAnalyzer/AWSSDK.AccessAnalyzer.NetFramework.csproj b/sdk/src/Services/AccessAnalyzer/AWSSDK.AccessAnalyzer.NetFramework.csproj
index 3b64912283c0..e5c42c0b6c64 100644
--- a/sdk/src/Services/AccessAnalyzer/AWSSDK.AccessAnalyzer.NetFramework.csproj
+++ b/sdk/src/Services/AccessAnalyzer/AWSSDK.AccessAnalyzer.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);BCL;AWS_ASYNC_API;CODE_ANALYSIS</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(RuleSetFileForBuild)' == 'false' Or '$(RuleSetFileForBuild)' == '' ">
diff --git a/sdk/src/Services/AccessAnalyzer/AWSSDK.AccessAnalyzer.NetStandard.csproj b/sdk/src/Services/AccessAnalyzer/AWSSDK.AccessAnalyzer.NetStandard.csproj
index e0966c901ce5..e21ce5c0d999 100644
--- a/sdk/src/Services/AccessAnalyzer/AWSSDK.AccessAnalyzer.NetStandard.csproj
+++ b/sdk/src/Services/AccessAnalyzer/AWSSDK.AccessAnalyzer.NetStandard.csproj
@@ -22,6 +22,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <!-- Async Enumerable Compatibility -->
diff --git a/sdk/src/Services/AccessAnalyzer/Generated/AmazonAccessAnalyzerConfig.cs b/sdk/src/Services/AccessAnalyzer/Generated/AmazonAccessAnalyzerConfig.cs
index 85d2e23349e8..314ec0e15d6d 100644
--- a/sdk/src/Services/AccessAnalyzer/Generated/AmazonAccessAnalyzerConfig.cs
+++ b/sdk/src/Services/AccessAnalyzer/Generated/AmazonAccessAnalyzerConfig.cs
@@ -34,7 +34,7 @@ namespace Amazon.AccessAnalyzer
     public partial class AmazonAccessAnalyzerConfig : ClientConfig
     {
         private static readonly string UserAgentString =
-            InternalSDKUtils.BuildUserAgentString("AccessAnalyzer", "3.7.303.25");
+            InternalSDKUtils.BuildUserAgentString("AccessAnalyzer", "4.0.0.0");
 
         private static readonly AmazonAccessAnalyzerEndpointResolver EndpointResolver =
             new AmazonAccessAnalyzerEndpointResolver();
diff --git a/sdk/src/Services/AccessAnalyzer/Properties/AssemblyInfo.cs b/sdk/src/Services/AccessAnalyzer/Properties/AssemblyInfo.cs
index e78a901dc0b1..80a5eda16226 100644
--- a/sdk/src/Services/AccessAnalyzer/Properties/AssemblyInfo.cs
+++ b/sdk/src/Services/AccessAnalyzer/Properties/AssemblyInfo.cs
@@ -41,5 +41,9 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.303.25")]
\ No newline at end of file
+#if BCL
+[assembly: AssemblyVersion("4.0")]
+#else
+[assembly: AssemblyVersion("4.0.0.0")]
+#endif
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/src/Services/Account/AWSSDK.Account.NetFramework.csproj b/sdk/src/Services/Account/AWSSDK.Account.NetFramework.csproj
index 0628721e68ce..571cfad0c936 100644
--- a/sdk/src/Services/Account/AWSSDK.Account.NetFramework.csproj
+++ b/sdk/src/Services/Account/AWSSDK.Account.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);BCL;AWS_ASYNC_API;CODE_ANALYSIS</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(RuleSetFileForBuild)' == 'false' Or '$(RuleSetFileForBuild)' == '' ">
diff --git a/sdk/src/Services/Account/AWSSDK.Account.NetStandard.csproj b/sdk/src/Services/Account/AWSSDK.Account.NetStandard.csproj
index 7423950f7fde..22774d58cbfc 100644
--- a/sdk/src/Services/Account/AWSSDK.Account.NetStandard.csproj
+++ b/sdk/src/Services/Account/AWSSDK.Account.NetStandard.csproj
@@ -22,6 +22,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <!-- Async Enumerable Compatibility -->
diff --git a/sdk/src/Services/Account/Generated/AmazonAccountConfig.cs b/sdk/src/Services/Account/Generated/AmazonAccountConfig.cs
index 9b93443343e7..25d964f42f9b 100644
--- a/sdk/src/Services/Account/Generated/AmazonAccountConfig.cs
+++ b/sdk/src/Services/Account/Generated/AmazonAccountConfig.cs
@@ -34,7 +34,7 @@ namespace Amazon.Account
     public partial class AmazonAccountConfig : ClientConfig
     {
         private static readonly string UserAgentString =
-            InternalSDKUtils.BuildUserAgentString("Account", "3.7.300.84");
+            InternalSDKUtils.BuildUserAgentString("Account", "4.0.0.0");
 
         private static readonly AmazonAccountEndpointResolver EndpointResolver =
             new AmazonAccountEndpointResolver();
diff --git a/sdk/src/Services/Account/Properties/AssemblyInfo.cs b/sdk/src/Services/Account/Properties/AssemblyInfo.cs
index be9dfdb384d3..1286a4e1dbe5 100644
--- a/sdk/src/Services/Account/Properties/AssemblyInfo.cs
+++ b/sdk/src/Services/Account/Properties/AssemblyInfo.cs
@@ -41,5 +41,9 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.300.84")]
\ No newline at end of file
+#if BCL
+[assembly: AssemblyVersion("4.0")]
+#else
+[assembly: AssemblyVersion("4.0.0.0")]
+#endif
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/src/Services/AlexaForBusiness/AWSSDK.AlexaForBusiness.NetFramework.csproj b/sdk/src/Services/AlexaForBusiness/AWSSDK.AlexaForBusiness.NetFramework.csproj
index c5dcdca60107..e1eae5d68166 100644
--- a/sdk/src/Services/AlexaForBusiness/AWSSDK.AlexaForBusiness.NetFramework.csproj
+++ b/sdk/src/Services/AlexaForBusiness/AWSSDK.AlexaForBusiness.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);BCL;AWS_ASYNC_API;CODE_ANALYSIS</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(RuleSetFileForBuild)' == 'false' Or '$(RuleSetFileForBuild)' == '' ">
diff --git a/sdk/src/Services/AlexaForBusiness/AWSSDK.AlexaForBusiness.NetStandard.csproj b/sdk/src/Services/AlexaForBusiness/AWSSDK.AlexaForBusiness.NetStandard.csproj
index e720f8e852f4..d636621c869e 100644
--- a/sdk/src/Services/AlexaForBusiness/AWSSDK.AlexaForBusiness.NetStandard.csproj
+++ b/sdk/src/Services/AlexaForBusiness/AWSSDK.AlexaForBusiness.NetStandard.csproj
@@ -22,6 +22,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <!-- Async Enumerable Compatibility -->
diff --git a/sdk/src/Services/AlexaForBusiness/Generated/AmazonAlexaForBusinessConfig.cs b/sdk/src/Services/AlexaForBusiness/Generated/AmazonAlexaForBusinessConfig.cs
index 26b9d6e2c06f..49612961b574 100644
--- a/sdk/src/Services/AlexaForBusiness/Generated/AmazonAlexaForBusinessConfig.cs
+++ b/sdk/src/Services/AlexaForBusiness/Generated/AmazonAlexaForBusinessConfig.cs
@@ -34,7 +34,7 @@ namespace Amazon.AlexaForBusiness
     public partial class AmazonAlexaForBusinessConfig : ClientConfig
     {
         private static readonly string UserAgentString =
-            InternalSDKUtils.BuildUserAgentString("Alexa For Business", "3.7.300.84");
+            InternalSDKUtils.BuildUserAgentString("Alexa For Business", "4.0.0.0");
 
         private static readonly AmazonAlexaForBusinessEndpointResolver EndpointResolver =
             new AmazonAlexaForBusinessEndpointResolver();
diff --git a/sdk/src/Services/AlexaForBusiness/Properties/AssemblyInfo.cs b/sdk/src/Services/AlexaForBusiness/Properties/AssemblyInfo.cs
index 7135e1726861..6cb1d9ee4e20 100644
--- a/sdk/src/Services/AlexaForBusiness/Properties/AssemblyInfo.cs
+++ b/sdk/src/Services/AlexaForBusiness/Properties/AssemblyInfo.cs
@@ -41,5 +41,9 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.300.84")]
\ No newline at end of file
+#if BCL
+[assembly: AssemblyVersion("4.0")]
+#else
+[assembly: AssemblyVersion("4.0.0.0")]
+#endif
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/src/Services/Amplify/AWSSDK.Amplify.NetFramework.csproj b/sdk/src/Services/Amplify/AWSSDK.Amplify.NetFramework.csproj
index 6fa62f1aeb53..e1441b08c489 100644
--- a/sdk/src/Services/Amplify/AWSSDK.Amplify.NetFramework.csproj
+++ b/sdk/src/Services/Amplify/AWSSDK.Amplify.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);BCL;AWS_ASYNC_API;CODE_ANALYSIS</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(RuleSetFileForBuild)' == 'false' Or '$(RuleSetFileForBuild)' == '' ">
diff --git a/sdk/src/Services/Amplify/AWSSDK.Amplify.NetStandard.csproj b/sdk/src/Services/Amplify/AWSSDK.Amplify.NetStandard.csproj
index dfc73e18ee94..faff98d21b74 100644
--- a/sdk/src/Services/Amplify/AWSSDK.Amplify.NetStandard.csproj
+++ b/sdk/src/Services/Amplify/AWSSDK.Amplify.NetStandard.csproj
@@ -22,6 +22,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <!-- Async Enumerable Compatibility -->
diff --git a/sdk/src/Services/Amplify/Generated/AmazonAmplifyConfig.cs b/sdk/src/Services/Amplify/Generated/AmazonAmplifyConfig.cs
index 878f2abd5b7d..e21f7c731199 100644
--- a/sdk/src/Services/Amplify/Generated/AmazonAmplifyConfig.cs
+++ b/sdk/src/Services/Amplify/Generated/AmazonAmplifyConfig.cs
@@ -34,7 +34,7 @@ namespace Amazon.Amplify
     public partial class AmazonAmplifyConfig : ClientConfig
     {
         private static readonly string UserAgentString =
-            InternalSDKUtils.BuildUserAgentString("Amplify", "3.7.302.0");
+            InternalSDKUtils.BuildUserAgentString("Amplify", "4.0.0.0");
 
         private static readonly AmazonAmplifyEndpointResolver EndpointResolver =
             new AmazonAmplifyEndpointResolver();
diff --git a/sdk/src/Services/Amplify/Properties/AssemblyInfo.cs b/sdk/src/Services/Amplify/Properties/AssemblyInfo.cs
index 03d46e09f417..7cb11158a1b9 100644
--- a/sdk/src/Services/Amplify/Properties/AssemblyInfo.cs
+++ b/sdk/src/Services/Amplify/Properties/AssemblyInfo.cs
@@ -41,5 +41,9 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.302.0")]
\ No newline at end of file
+#if BCL
+[assembly: AssemblyVersion("4.0")]
+#else
+[assembly: AssemblyVersion("4.0.0.0")]
+#endif
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/src/Services/AmplifyBackend/AWSSDK.AmplifyBackend.NetFramework.csproj b/sdk/src/Services/AmplifyBackend/AWSSDK.AmplifyBackend.NetFramework.csproj
index ebaa6599106a..89b6ec2442f6 100644
--- a/sdk/src/Services/AmplifyBackend/AWSSDK.AmplifyBackend.NetFramework.csproj
+++ b/sdk/src/Services/AmplifyBackend/AWSSDK.AmplifyBackend.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);BCL;AWS_ASYNC_API;CODE_ANALYSIS</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(RuleSetFileForBuild)' == 'false' Or '$(RuleSetFileForBuild)' == '' ">
diff --git a/sdk/src/Services/AmplifyBackend/AWSSDK.AmplifyBackend.NetStandard.csproj b/sdk/src/Services/AmplifyBackend/AWSSDK.AmplifyBackend.NetStandard.csproj
index ef4ed43a91ac..4ff7f30d0e67 100644
--- a/sdk/src/Services/AmplifyBackend/AWSSDK.AmplifyBackend.NetStandard.csproj
+++ b/sdk/src/Services/AmplifyBackend/AWSSDK.AmplifyBackend.NetStandard.csproj
@@ -22,6 +22,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <!-- Async Enumerable Compatibility -->
diff --git a/sdk/src/Services/AmplifyBackend/Generated/AmazonAmplifyBackendConfig.cs b/sdk/src/Services/AmplifyBackend/Generated/AmazonAmplifyBackendConfig.cs
index 98561bed9ac9..a693e61a8c39 100644
--- a/sdk/src/Services/AmplifyBackend/Generated/AmazonAmplifyBackendConfig.cs
+++ b/sdk/src/Services/AmplifyBackend/Generated/AmazonAmplifyBackendConfig.cs
@@ -34,7 +34,7 @@ namespace Amazon.AmplifyBackend
     public partial class AmazonAmplifyBackendConfig : ClientConfig
     {
         private static readonly string UserAgentString =
-            InternalSDKUtils.BuildUserAgentString("AmplifyBackend", "3.7.300.84");
+            InternalSDKUtils.BuildUserAgentString("AmplifyBackend", "4.0.0.0");
 
         private static readonly AmazonAmplifyBackendEndpointResolver EndpointResolver =
             new AmazonAmplifyBackendEndpointResolver();
diff --git a/sdk/src/Services/AmplifyBackend/Properties/AssemblyInfo.cs b/sdk/src/Services/AmplifyBackend/Properties/AssemblyInfo.cs
index a413a3e16fea..b781d7a18000 100644
--- a/sdk/src/Services/AmplifyBackend/Properties/AssemblyInfo.cs
+++ b/sdk/src/Services/AmplifyBackend/Properties/AssemblyInfo.cs
@@ -41,5 +41,9 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.300.84")]
\ No newline at end of file
+#if BCL
+[assembly: AssemblyVersion("4.0")]
+#else
+[assembly: AssemblyVersion("4.0.0.0")]
+#endif
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/src/Services/AmplifyUIBuilder/AWSSDK.AmplifyUIBuilder.NetFramework.csproj b/sdk/src/Services/AmplifyUIBuilder/AWSSDK.AmplifyUIBuilder.NetFramework.csproj
index acbe9935a4aa..b3950cd90879 100644
--- a/sdk/src/Services/AmplifyUIBuilder/AWSSDK.AmplifyUIBuilder.NetFramework.csproj
+++ b/sdk/src/Services/AmplifyUIBuilder/AWSSDK.AmplifyUIBuilder.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);BCL;AWS_ASYNC_API;CODE_ANALYSIS</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(RuleSetFileForBuild)' == 'false' Or '$(RuleSetFileForBuild)' == '' ">
diff --git a/sdk/src/Services/AmplifyUIBuilder/AWSSDK.AmplifyUIBuilder.NetStandard.csproj b/sdk/src/Services/AmplifyUIBuilder/AWSSDK.AmplifyUIBuilder.NetStandard.csproj
index 471ed0f5d92b..6d8a8cf80509 100644
--- a/sdk/src/Services/AmplifyUIBuilder/AWSSDK.AmplifyUIBuilder.NetStandard.csproj
+++ b/sdk/src/Services/AmplifyUIBuilder/AWSSDK.AmplifyUIBuilder.NetStandard.csproj
@@ -22,6 +22,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <!-- Async Enumerable Compatibility -->
diff --git a/sdk/src/Services/AmplifyUIBuilder/Generated/AmazonAmplifyUIBuilderConfig.cs b/sdk/src/Services/AmplifyUIBuilder/Generated/AmazonAmplifyUIBuilderConfig.cs
index 8d7982f2eeae..4a1ba3aad472 100644
--- a/sdk/src/Services/AmplifyUIBuilder/Generated/AmazonAmplifyUIBuilderConfig.cs
+++ b/sdk/src/Services/AmplifyUIBuilder/Generated/AmazonAmplifyUIBuilderConfig.cs
@@ -34,7 +34,7 @@ namespace Amazon.AmplifyUIBuilder
     public partial class AmazonAmplifyUIBuilderConfig : ClientConfig
     {
         private static readonly string UserAgentString =
-            InternalSDKUtils.BuildUserAgentString("AmplifyUIBuilder", "3.7.301.31");
+            InternalSDKUtils.BuildUserAgentString("AmplifyUIBuilder", "4.0.0.0");
 
         private static readonly AmazonAmplifyUIBuilderEndpointResolver EndpointResolver =
             new AmazonAmplifyUIBuilderEndpointResolver();
diff --git a/sdk/src/Services/AmplifyUIBuilder/Properties/AssemblyInfo.cs b/sdk/src/Services/AmplifyUIBuilder/Properties/AssemblyInfo.cs
index e6fda9daa7f5..afcebe102ac9 100644
--- a/sdk/src/Services/AmplifyUIBuilder/Properties/AssemblyInfo.cs
+++ b/sdk/src/Services/AmplifyUIBuilder/Properties/AssemblyInfo.cs
@@ -41,5 +41,9 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.301.31")]
\ No newline at end of file
+#if BCL
+[assembly: AssemblyVersion("4.0")]
+#else
+[assembly: AssemblyVersion("4.0.0.0")]
+#endif
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/src/Services/ApiGatewayManagementApi/AWSSDK.ApiGatewayManagementApi.NetFramework.csproj b/sdk/src/Services/ApiGatewayManagementApi/AWSSDK.ApiGatewayManagementApi.NetFramework.csproj
index 0ed26c6220c1..0869ef752854 100644
--- a/sdk/src/Services/ApiGatewayManagementApi/AWSSDK.ApiGatewayManagementApi.NetFramework.csproj
+++ b/sdk/src/Services/ApiGatewayManagementApi/AWSSDK.ApiGatewayManagementApi.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);BCL;AWS_ASYNC_API;CODE_ANALYSIS</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(RuleSetFileForBuild)' == 'false' Or '$(RuleSetFileForBuild)' == '' ">
diff --git a/sdk/src/Services/ApiGatewayManagementApi/AWSSDK.ApiGatewayManagementApi.NetStandard.csproj b/sdk/src/Services/ApiGatewayManagementApi/AWSSDK.ApiGatewayManagementApi.NetStandard.csproj
index b032008d4292..ff6d10500be5 100644
--- a/sdk/src/Services/ApiGatewayManagementApi/AWSSDK.ApiGatewayManagementApi.NetStandard.csproj
+++ b/sdk/src/Services/ApiGatewayManagementApi/AWSSDK.ApiGatewayManagementApi.NetStandard.csproj
@@ -22,6 +22,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <!-- Async Enumerable Compatibility -->
diff --git a/sdk/src/Services/ApiGatewayManagementApi/Generated/AmazonApiGatewayManagementApiConfig.cs b/sdk/src/Services/ApiGatewayManagementApi/Generated/AmazonApiGatewayManagementApiConfig.cs
index 73523efc7907..1383fa93294d 100644
--- a/sdk/src/Services/ApiGatewayManagementApi/Generated/AmazonApiGatewayManagementApiConfig.cs
+++ b/sdk/src/Services/ApiGatewayManagementApi/Generated/AmazonApiGatewayManagementApiConfig.cs
@@ -34,7 +34,7 @@ namespace Amazon.ApiGatewayManagementApi
     public partial class AmazonApiGatewayManagementApiConfig : ClientConfig
     {
         private static readonly string UserAgentString =
-            InternalSDKUtils.BuildUserAgentString("ApiGatewayManagementApi", "3.7.300.84");
+            InternalSDKUtils.BuildUserAgentString("ApiGatewayManagementApi", "4.0.0.0");
 
         private static readonly AmazonApiGatewayManagementApiEndpointResolver EndpointResolver =
             new AmazonApiGatewayManagementApiEndpointResolver();
diff --git a/sdk/src/Services/ApiGatewayManagementApi/Properties/AssemblyInfo.cs b/sdk/src/Services/ApiGatewayManagementApi/Properties/AssemblyInfo.cs
index b1b9be36d8da..1ad789b68a2b 100644
--- a/sdk/src/Services/ApiGatewayManagementApi/Properties/AssemblyInfo.cs
+++ b/sdk/src/Services/ApiGatewayManagementApi/Properties/AssemblyInfo.cs
@@ -41,5 +41,9 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.300.84")]
\ No newline at end of file
+#if BCL
+[assembly: AssemblyVersion("4.0")]
+#else
+[assembly: AssemblyVersion("4.0.0.0")]
+#endif
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/src/Services/ApiGatewayV2/AWSSDK.ApiGatewayV2.NetFramework.csproj b/sdk/src/Services/ApiGatewayV2/AWSSDK.ApiGatewayV2.NetFramework.csproj
index 692a53428c05..290307fcb1b0 100644
--- a/sdk/src/Services/ApiGatewayV2/AWSSDK.ApiGatewayV2.NetFramework.csproj
+++ b/sdk/src/Services/ApiGatewayV2/AWSSDK.ApiGatewayV2.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);BCL;AWS_ASYNC_API;CODE_ANALYSIS</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(RuleSetFileForBuild)' == 'false' Or '$(RuleSetFileForBuild)' == '' ">
diff --git a/sdk/src/Services/ApiGatewayV2/AWSSDK.ApiGatewayV2.NetStandard.csproj b/sdk/src/Services/ApiGatewayV2/AWSSDK.ApiGatewayV2.NetStandard.csproj
index efdca2ad0849..e1deba27af8d 100644
--- a/sdk/src/Services/ApiGatewayV2/AWSSDK.ApiGatewayV2.NetStandard.csproj
+++ b/sdk/src/Services/ApiGatewayV2/AWSSDK.ApiGatewayV2.NetStandard.csproj
@@ -22,6 +22,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <!-- Async Enumerable Compatibility -->
diff --git a/sdk/src/Services/ApiGatewayV2/Generated/AmazonApiGatewayV2Config.cs b/sdk/src/Services/ApiGatewayV2/Generated/AmazonApiGatewayV2Config.cs
index 5353bc56d117..9b5f11085119 100644
--- a/sdk/src/Services/ApiGatewayV2/Generated/AmazonApiGatewayV2Config.cs
+++ b/sdk/src/Services/ApiGatewayV2/Generated/AmazonApiGatewayV2Config.cs
@@ -34,7 +34,7 @@ namespace Amazon.ApiGatewayV2
     public partial class AmazonApiGatewayV2Config : ClientConfig
     {
         private static readonly string UserAgentString =
-            InternalSDKUtils.BuildUserAgentString("ApiGatewayV2", "3.7.300.84");
+            InternalSDKUtils.BuildUserAgentString("ApiGatewayV2", "4.0.0.0");
 
         private static readonly AmazonApiGatewayV2EndpointResolver EndpointResolver =
             new AmazonApiGatewayV2EndpointResolver();
diff --git a/sdk/src/Services/ApiGatewayV2/Properties/AssemblyInfo.cs b/sdk/src/Services/ApiGatewayV2/Properties/AssemblyInfo.cs
index 15071af449c0..a26277f360a6 100644
--- a/sdk/src/Services/ApiGatewayV2/Properties/AssemblyInfo.cs
+++ b/sdk/src/Services/ApiGatewayV2/Properties/AssemblyInfo.cs
@@ -41,5 +41,9 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.300.84")]
\ No newline at end of file
+#if BCL
+[assembly: AssemblyVersion("4.0")]
+#else
+[assembly: AssemblyVersion("4.0.0.0")]
+#endif
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/src/Services/AppConfig/AWSSDK.AppConfig.NetFramework.csproj b/sdk/src/Services/AppConfig/AWSSDK.AppConfig.NetFramework.csproj
index 47d6153bb790..e180193571eb 100644
--- a/sdk/src/Services/AppConfig/AWSSDK.AppConfig.NetFramework.csproj
+++ b/sdk/src/Services/AppConfig/AWSSDK.AppConfig.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);BCL;AWS_ASYNC_API;CODE_ANALYSIS</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(RuleSetFileForBuild)' == 'false' Or '$(RuleSetFileForBuild)' == '' ">
diff --git a/sdk/src/Services/AppConfig/AWSSDK.AppConfig.NetStandard.csproj b/sdk/src/Services/AppConfig/AWSSDK.AppConfig.NetStandard.csproj
index 4f2a7d843bcc..b43a8dbcd94e 100644
--- a/sdk/src/Services/AppConfig/AWSSDK.AppConfig.NetStandard.csproj
+++ b/sdk/src/Services/AppConfig/AWSSDK.AppConfig.NetStandard.csproj
@@ -22,6 +22,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <!-- Async Enumerable Compatibility -->
diff --git a/sdk/src/Services/AppConfig/Generated/AmazonAppConfigConfig.cs b/sdk/src/Services/AppConfig/Generated/AmazonAppConfigConfig.cs
index 42c4abfc3747..23cdf4c2e475 100644
--- a/sdk/src/Services/AppConfig/Generated/AmazonAppConfigConfig.cs
+++ b/sdk/src/Services/AppConfig/Generated/AmazonAppConfigConfig.cs
@@ -34,7 +34,7 @@ namespace Amazon.AppConfig
     public partial class AmazonAppConfigConfig : ClientConfig
     {
         private static readonly string UserAgentString =
-            InternalSDKUtils.BuildUserAgentString("AppConfig", "3.7.301.30");
+            InternalSDKUtils.BuildUserAgentString("AppConfig", "4.0.0.0");
 
         private static readonly AmazonAppConfigEndpointResolver EndpointResolver =
             new AmazonAppConfigEndpointResolver();
diff --git a/sdk/src/Services/AppConfig/Properties/AssemblyInfo.cs b/sdk/src/Services/AppConfig/Properties/AssemblyInfo.cs
index b349a257a14a..e98681c07b7c 100644
--- a/sdk/src/Services/AppConfig/Properties/AssemblyInfo.cs
+++ b/sdk/src/Services/AppConfig/Properties/AssemblyInfo.cs
@@ -41,5 +41,9 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.301.30")]
\ No newline at end of file
+#if BCL
+[assembly: AssemblyVersion("4.0")]
+#else
+[assembly: AssemblyVersion("4.0.0.0")]
+#endif
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/src/Services/AppConfigData/AWSSDK.AppConfigData.NetFramework.csproj b/sdk/src/Services/AppConfigData/AWSSDK.AppConfigData.NetFramework.csproj
index 70fad7716f19..e9c341678816 100644
--- a/sdk/src/Services/AppConfigData/AWSSDK.AppConfigData.NetFramework.csproj
+++ b/sdk/src/Services/AppConfigData/AWSSDK.AppConfigData.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);BCL;AWS_ASYNC_API;CODE_ANALYSIS</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(RuleSetFileForBuild)' == 'false' Or '$(RuleSetFileForBuild)' == '' ">
diff --git a/sdk/src/Services/AppConfigData/AWSSDK.AppConfigData.NetStandard.csproj b/sdk/src/Services/AppConfigData/AWSSDK.AppConfigData.NetStandard.csproj
index 7d7d55b15bd0..fe8908da9fdd 100644
--- a/sdk/src/Services/AppConfigData/AWSSDK.AppConfigData.NetStandard.csproj
+++ b/sdk/src/Services/AppConfigData/AWSSDK.AppConfigData.NetStandard.csproj
@@ -22,6 +22,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <!-- Async Enumerable Compatibility -->
diff --git a/sdk/src/Services/AppConfigData/Generated/AmazonAppConfigDataConfig.cs b/sdk/src/Services/AppConfigData/Generated/AmazonAppConfigDataConfig.cs
index a9a926ae831e..7fefd85afed5 100644
--- a/sdk/src/Services/AppConfigData/Generated/AmazonAppConfigDataConfig.cs
+++ b/sdk/src/Services/AppConfigData/Generated/AmazonAppConfigDataConfig.cs
@@ -34,7 +34,7 @@ namespace Amazon.AppConfigData
     public partial class AmazonAppConfigDataConfig : ClientConfig
     {
         private static readonly string UserAgentString =
-            InternalSDKUtils.BuildUserAgentString("AppConfigData", "3.7.301.45");
+            InternalSDKUtils.BuildUserAgentString("AppConfigData", "4.0.0.0");
 
         private static readonly AmazonAppConfigDataEndpointResolver EndpointResolver =
             new AmazonAppConfigDataEndpointResolver();
diff --git a/sdk/src/Services/AppConfigData/Properties/AssemblyInfo.cs b/sdk/src/Services/AppConfigData/Properties/AssemblyInfo.cs
index ea6d1eb108fd..0a36c7d98a33 100644
--- a/sdk/src/Services/AppConfigData/Properties/AssemblyInfo.cs
+++ b/sdk/src/Services/AppConfigData/Properties/AssemblyInfo.cs
@@ -41,5 +41,9 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.301.45")]
\ No newline at end of file
+#if BCL
+[assembly: AssemblyVersion("4.0")]
+#else
+[assembly: AssemblyVersion("4.0.0.0")]
+#endif
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/src/Services/AppFabric/AWSSDK.AppFabric.NetFramework.csproj b/sdk/src/Services/AppFabric/AWSSDK.AppFabric.NetFramework.csproj
index d6b3112f7af3..e21610d2c071 100644
--- a/sdk/src/Services/AppFabric/AWSSDK.AppFabric.NetFramework.csproj
+++ b/sdk/src/Services/AppFabric/AWSSDK.AppFabric.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);BCL;AWS_ASYNC_API;CODE_ANALYSIS</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(RuleSetFileForBuild)' == 'false' Or '$(RuleSetFileForBuild)' == '' ">
diff --git a/sdk/src/Services/AppFabric/AWSSDK.AppFabric.NetStandard.csproj b/sdk/src/Services/AppFabric/AWSSDK.AppFabric.NetStandard.csproj
index 556c9609304f..8f38d603ba89 100644
--- a/sdk/src/Services/AppFabric/AWSSDK.AppFabric.NetStandard.csproj
+++ b/sdk/src/Services/AppFabric/AWSSDK.AppFabric.NetStandard.csproj
@@ -22,6 +22,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <!-- Async Enumerable Compatibility -->
diff --git a/sdk/src/Services/AppFabric/Generated/AmazonAppFabricConfig.cs b/sdk/src/Services/AppFabric/Generated/AmazonAppFabricConfig.cs
index 510a5d63b052..5e9c53ce51c5 100644
--- a/sdk/src/Services/AppFabric/Generated/AmazonAppFabricConfig.cs
+++ b/sdk/src/Services/AppFabric/Generated/AmazonAppFabricConfig.cs
@@ -34,7 +34,7 @@ namespace Amazon.AppFabric
     public partial class AmazonAppFabricConfig : ClientConfig
     {
         private static readonly string UserAgentString =
-            InternalSDKUtils.BuildUserAgentString("AppFabric", "3.7.300.84");
+            InternalSDKUtils.BuildUserAgentString("AppFabric", "4.0.0.0");
 
         private static readonly AmazonAppFabricEndpointResolver EndpointResolver =
             new AmazonAppFabricEndpointResolver();
diff --git a/sdk/src/Services/AppFabric/Properties/AssemblyInfo.cs b/sdk/src/Services/AppFabric/Properties/AssemblyInfo.cs
index f16ceaf46793..8bdcc37f31fa 100644
--- a/sdk/src/Services/AppFabric/Properties/AssemblyInfo.cs
+++ b/sdk/src/Services/AppFabric/Properties/AssemblyInfo.cs
@@ -41,5 +41,9 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.300.84")]
\ No newline at end of file
+#if BCL
+[assembly: AssemblyVersion("4.0")]
+#else
+[assembly: AssemblyVersion("4.0.0.0")]
+#endif
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/src/Services/AppIntegrationsService/AWSSDK.AppIntegrationsService.NetFramework.csproj b/sdk/src/Services/AppIntegrationsService/AWSSDK.AppIntegrationsService.NetFramework.csproj
index 0094bbd4f59c..e9820bae43dc 100644
--- a/sdk/src/Services/AppIntegrationsService/AWSSDK.AppIntegrationsService.NetFramework.csproj
+++ b/sdk/src/Services/AppIntegrationsService/AWSSDK.AppIntegrationsService.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);BCL;AWS_ASYNC_API;CODE_ANALYSIS</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(RuleSetFileForBuild)' == 'false' Or '$(RuleSetFileForBuild)' == '' ">
diff --git a/sdk/src/Services/AppIntegrationsService/AWSSDK.AppIntegrationsService.NetStandard.csproj b/sdk/src/Services/AppIntegrationsService/AWSSDK.AppIntegrationsService.NetStandard.csproj
index c1c2cf5b8edd..e5c0d750deb8 100644
--- a/sdk/src/Services/AppIntegrationsService/AWSSDK.AppIntegrationsService.NetStandard.csproj
+++ b/sdk/src/Services/AppIntegrationsService/AWSSDK.AppIntegrationsService.NetStandard.csproj
@@ -22,6 +22,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <!-- Async Enumerable Compatibility -->
diff --git a/sdk/src/Services/AppIntegrationsService/Generated/AmazonAppIntegrationsServiceConfig.cs b/sdk/src/Services/AppIntegrationsService/Generated/AmazonAppIntegrationsServiceConfig.cs
index e77160ea6032..3edc46044975 100644
--- a/sdk/src/Services/AppIntegrationsService/Generated/AmazonAppIntegrationsServiceConfig.cs
+++ b/sdk/src/Services/AppIntegrationsService/Generated/AmazonAppIntegrationsServiceConfig.cs
@@ -34,7 +34,7 @@ namespace Amazon.AppIntegrationsService
     public partial class AmazonAppIntegrationsServiceConfig : ClientConfig
     {
         private static readonly string UserAgentString =
-            InternalSDKUtils.BuildUserAgentString("AppIntegrations", "3.7.301.60");
+            InternalSDKUtils.BuildUserAgentString("AppIntegrations", "4.0.0.0");
 
         private static readonly AmazonAppIntegrationsServiceEndpointResolver EndpointResolver =
             new AmazonAppIntegrationsServiceEndpointResolver();
diff --git a/sdk/src/Services/AppIntegrationsService/Properties/AssemblyInfo.cs b/sdk/src/Services/AppIntegrationsService/Properties/AssemblyInfo.cs
index c2eff0c2a2ec..946c5589f077 100644
--- a/sdk/src/Services/AppIntegrationsService/Properties/AssemblyInfo.cs
+++ b/sdk/src/Services/AppIntegrationsService/Properties/AssemblyInfo.cs
@@ -41,5 +41,9 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.301.60")]
\ No newline at end of file
+#if BCL
+[assembly: AssemblyVersion("4.0")]
+#else
+[assembly: AssemblyVersion("4.0.0.0")]
+#endif
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/src/Services/AppMesh/AWSSDK.AppMesh.NetFramework.csproj b/sdk/src/Services/AppMesh/AWSSDK.AppMesh.NetFramework.csproj
index 734887e61605..f561080f2dfb 100644
--- a/sdk/src/Services/AppMesh/AWSSDK.AppMesh.NetFramework.csproj
+++ b/sdk/src/Services/AppMesh/AWSSDK.AppMesh.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);BCL;AWS_ASYNC_API;CODE_ANALYSIS</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(RuleSetFileForBuild)' == 'false' Or '$(RuleSetFileForBuild)' == '' ">
diff --git a/sdk/src/Services/AppMesh/AWSSDK.AppMesh.NetStandard.csproj b/sdk/src/Services/AppMesh/AWSSDK.AppMesh.NetStandard.csproj
index 1a25c5ffa2c4..0e9877719790 100644
--- a/sdk/src/Services/AppMesh/AWSSDK.AppMesh.NetStandard.csproj
+++ b/sdk/src/Services/AppMesh/AWSSDK.AppMesh.NetStandard.csproj
@@ -22,6 +22,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <!-- Async Enumerable Compatibility -->
diff --git a/sdk/src/Services/AppMesh/Generated/AmazonAppMeshConfig.cs b/sdk/src/Services/AppMesh/Generated/AmazonAppMeshConfig.cs
index e97432901771..f6fbb965e6a9 100644
--- a/sdk/src/Services/AppMesh/Generated/AmazonAppMeshConfig.cs
+++ b/sdk/src/Services/AppMesh/Generated/AmazonAppMeshConfig.cs
@@ -34,7 +34,7 @@ namespace Amazon.AppMesh
     public partial class AmazonAppMeshConfig : ClientConfig
     {
         private static readonly string UserAgentString =
-            InternalSDKUtils.BuildUserAgentString("App Mesh", "3.7.301.79");
+            InternalSDKUtils.BuildUserAgentString("App Mesh", "4.0.0.0");
 
         private static readonly AmazonAppMeshEndpointResolver EndpointResolver =
             new AmazonAppMeshEndpointResolver();
diff --git a/sdk/src/Services/AppMesh/Properties/AssemblyInfo.cs b/sdk/src/Services/AppMesh/Properties/AssemblyInfo.cs
index 2e51e7eb2a09..2c78fd372aa6 100644
--- a/sdk/src/Services/AppMesh/Properties/AssemblyInfo.cs
+++ b/sdk/src/Services/AppMesh/Properties/AssemblyInfo.cs
@@ -41,5 +41,9 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.301.79")]
\ No newline at end of file
+#if BCL
+[assembly: AssemblyVersion("4.0")]
+#else
+[assembly: AssemblyVersion("4.0.0.0")]
+#endif
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/src/Services/AppRegistry/AWSSDK.AppRegistry.NetFramework.csproj b/sdk/src/Services/AppRegistry/AWSSDK.AppRegistry.NetFramework.csproj
index 4c358a6065e5..0cd8bd7a7ab1 100644
--- a/sdk/src/Services/AppRegistry/AWSSDK.AppRegistry.NetFramework.csproj
+++ b/sdk/src/Services/AppRegistry/AWSSDK.AppRegistry.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);BCL;AWS_ASYNC_API;CODE_ANALYSIS</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(RuleSetFileForBuild)' == 'false' Or '$(RuleSetFileForBuild)' == '' ">
diff --git a/sdk/src/Services/AppRegistry/AWSSDK.AppRegistry.NetStandard.csproj b/sdk/src/Services/AppRegistry/AWSSDK.AppRegistry.NetStandard.csproj
index cda9235d1883..daa435ad23f7 100644
--- a/sdk/src/Services/AppRegistry/AWSSDK.AppRegistry.NetStandard.csproj
+++ b/sdk/src/Services/AppRegistry/AWSSDK.AppRegistry.NetStandard.csproj
@@ -22,6 +22,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <!-- Async Enumerable Compatibility -->
diff --git a/sdk/src/Services/AppRegistry/Generated/AmazonAppRegistryConfig.cs b/sdk/src/Services/AppRegistry/Generated/AmazonAppRegistryConfig.cs
index fe50d5f17613..2cc29b453af8 100644
--- a/sdk/src/Services/AppRegistry/Generated/AmazonAppRegistryConfig.cs
+++ b/sdk/src/Services/AppRegistry/Generated/AmazonAppRegistryConfig.cs
@@ -34,7 +34,7 @@ namespace Amazon.AppRegistry
     public partial class AmazonAppRegistryConfig : ClientConfig
     {
         private static readonly string UserAgentString =
-            InternalSDKUtils.BuildUserAgentString("Service Catalog AppRegistry", "3.7.301.83");
+            InternalSDKUtils.BuildUserAgentString("Service Catalog AppRegistry", "4.0.0.0");
 
         private static readonly AmazonAppRegistryEndpointResolver EndpointResolver =
             new AmazonAppRegistryEndpointResolver();
diff --git a/sdk/src/Services/AppRegistry/Properties/AssemblyInfo.cs b/sdk/src/Services/AppRegistry/Properties/AssemblyInfo.cs
index 0a9b5c9378f0..57b1a9cda784 100644
--- a/sdk/src/Services/AppRegistry/Properties/AssemblyInfo.cs
+++ b/sdk/src/Services/AppRegistry/Properties/AssemblyInfo.cs
@@ -41,5 +41,9 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.301.83")]
\ No newline at end of file
+#if BCL
+[assembly: AssemblyVersion("4.0")]
+#else
+[assembly: AssemblyVersion("4.0.0.0")]
+#endif
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/src/Services/AppRunner/AWSSDK.AppRunner.NetFramework.csproj b/sdk/src/Services/AppRunner/AWSSDK.AppRunner.NetFramework.csproj
index 2d25cb37daa9..d5081edd6f78 100644
--- a/sdk/src/Services/AppRunner/AWSSDK.AppRunner.NetFramework.csproj
+++ b/sdk/src/Services/AppRunner/AWSSDK.AppRunner.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);BCL;AWS_ASYNC_API;CODE_ANALYSIS</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(RuleSetFileForBuild)' == 'false' Or '$(RuleSetFileForBuild)' == '' ">
diff --git a/sdk/src/Services/AppRunner/AWSSDK.AppRunner.NetStandard.csproj b/sdk/src/Services/AppRunner/AWSSDK.AppRunner.NetStandard.csproj
index 9f48c4112db8..32c14289cc18 100644
--- a/sdk/src/Services/AppRunner/AWSSDK.AppRunner.NetStandard.csproj
+++ b/sdk/src/Services/AppRunner/AWSSDK.AppRunner.NetStandard.csproj
@@ -22,6 +22,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <!-- Async Enumerable Compatibility -->
diff --git a/sdk/src/Services/AppRunner/Generated/AmazonAppRunnerConfig.cs b/sdk/src/Services/AppRunner/Generated/AmazonAppRunnerConfig.cs
index da63dbcd65c3..d632054a8d1c 100644
--- a/sdk/src/Services/AppRunner/Generated/AmazonAppRunnerConfig.cs
+++ b/sdk/src/Services/AppRunner/Generated/AmazonAppRunnerConfig.cs
@@ -34,7 +34,7 @@ namespace Amazon.AppRunner
     public partial class AmazonAppRunnerConfig : ClientConfig
     {
         private static readonly string UserAgentString =
-            InternalSDKUtils.BuildUserAgentString("AppRunner", "3.7.301.56");
+            InternalSDKUtils.BuildUserAgentString("AppRunner", "4.0.0.0");
 
         private static readonly AmazonAppRunnerEndpointResolver EndpointResolver =
             new AmazonAppRunnerEndpointResolver();
diff --git a/sdk/src/Services/AppRunner/Properties/AssemblyInfo.cs b/sdk/src/Services/AppRunner/Properties/AssemblyInfo.cs
index 48b79cc5ab53..dead332461e5 100644
--- a/sdk/src/Services/AppRunner/Properties/AssemblyInfo.cs
+++ b/sdk/src/Services/AppRunner/Properties/AssemblyInfo.cs
@@ -41,5 +41,9 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.301.56")]
\ No newline at end of file
+#if BCL
+[assembly: AssemblyVersion("4.0")]
+#else
+[assembly: AssemblyVersion("4.0.0.0")]
+#endif
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/src/Services/AppStream/AWSSDK.AppStream.NetFramework.csproj b/sdk/src/Services/AppStream/AWSSDK.AppStream.NetFramework.csproj
index e65e43a5e2ab..6a32293ff69e 100644
--- a/sdk/src/Services/AppStream/AWSSDK.AppStream.NetFramework.csproj
+++ b/sdk/src/Services/AppStream/AWSSDK.AppStream.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);BCL;AWS_ASYNC_API;CODE_ANALYSIS</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(RuleSetFileForBuild)' == 'false' Or '$(RuleSetFileForBuild)' == '' ">
diff --git a/sdk/src/Services/AppStream/AWSSDK.AppStream.NetStandard.csproj b/sdk/src/Services/AppStream/AWSSDK.AppStream.NetStandard.csproj
index 729d4b036e0f..37f083de04eb 100644
--- a/sdk/src/Services/AppStream/AWSSDK.AppStream.NetStandard.csproj
+++ b/sdk/src/Services/AppStream/AWSSDK.AppStream.NetStandard.csproj
@@ -22,6 +22,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <!-- Async Enumerable Compatibility -->
diff --git a/sdk/src/Services/AppStream/Generated/AmazonAppStreamConfig.cs b/sdk/src/Services/AppStream/Generated/AmazonAppStreamConfig.cs
index 91a3179491e2..c46f6a32e818 100644
--- a/sdk/src/Services/AppStream/Generated/AmazonAppStreamConfig.cs
+++ b/sdk/src/Services/AppStream/Generated/AmazonAppStreamConfig.cs
@@ -34,7 +34,7 @@ namespace Amazon.AppStream
     public partial class AmazonAppStreamConfig : ClientConfig
     {
         private static readonly string UserAgentString =
-            InternalSDKUtils.BuildUserAgentString("AppStream", "3.7.302.61");
+            InternalSDKUtils.BuildUserAgentString("AppStream", "4.0.0.0");
 
         private static readonly AmazonAppStreamEndpointResolver EndpointResolver =
             new AmazonAppStreamEndpointResolver();
diff --git a/sdk/src/Services/AppStream/Properties/AssemblyInfo.cs b/sdk/src/Services/AppStream/Properties/AssemblyInfo.cs
index 15ed8aa53b92..485ee9483c2b 100644
--- a/sdk/src/Services/AppStream/Properties/AssemblyInfo.cs
+++ b/sdk/src/Services/AppStream/Properties/AssemblyInfo.cs
@@ -41,5 +41,9 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.302.61")]
\ No newline at end of file
+#if BCL
+[assembly: AssemblyVersion("4.0")]
+#else
+[assembly: AssemblyVersion("4.0.0.0")]
+#endif
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/src/Services/AppSync/AWSSDK.AppSync.NetFramework.csproj b/sdk/src/Services/AppSync/AWSSDK.AppSync.NetFramework.csproj
index b3e0100ff1f7..565ddbda983b 100644
--- a/sdk/src/Services/AppSync/AWSSDK.AppSync.NetFramework.csproj
+++ b/sdk/src/Services/AppSync/AWSSDK.AppSync.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);BCL;AWS_ASYNC_API;CODE_ANALYSIS</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(RuleSetFileForBuild)' == 'false' Or '$(RuleSetFileForBuild)' == '' ">
diff --git a/sdk/src/Services/AppSync/AWSSDK.AppSync.NetStandard.csproj b/sdk/src/Services/AppSync/AWSSDK.AppSync.NetStandard.csproj
index ae6060976f87..d5dd7e883b66 100644
--- a/sdk/src/Services/AppSync/AWSSDK.AppSync.NetStandard.csproj
+++ b/sdk/src/Services/AppSync/AWSSDK.AppSync.NetStandard.csproj
@@ -22,6 +22,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <!-- Async Enumerable Compatibility -->
diff --git a/sdk/src/Services/AppSync/Generated/AmazonAppSyncConfig.cs b/sdk/src/Services/AppSync/Generated/AmazonAppSyncConfig.cs
index a41a3424f491..2e09d3570c64 100644
--- a/sdk/src/Services/AppSync/Generated/AmazonAppSyncConfig.cs
+++ b/sdk/src/Services/AppSync/Generated/AmazonAppSyncConfig.cs
@@ -34,7 +34,7 @@ namespace Amazon.AppSync
     public partial class AmazonAppSyncConfig : ClientConfig
     {
         private static readonly string UserAgentString =
-            InternalSDKUtils.BuildUserAgentString("AppSync", "3.7.305.2");
+            InternalSDKUtils.BuildUserAgentString("AppSync", "4.0.0.0");
 
         private static readonly AmazonAppSyncEndpointResolver EndpointResolver =
             new AmazonAppSyncEndpointResolver();
diff --git a/sdk/src/Services/AppSync/Properties/AssemblyInfo.cs b/sdk/src/Services/AppSync/Properties/AssemblyInfo.cs
index e057056919e9..ba732a8245b3 100644
--- a/sdk/src/Services/AppSync/Properties/AssemblyInfo.cs
+++ b/sdk/src/Services/AppSync/Properties/AssemblyInfo.cs
@@ -41,5 +41,9 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.305.2")]
\ No newline at end of file
+#if BCL
+[assembly: AssemblyVersion("4.0")]
+#else
+[assembly: AssemblyVersion("4.0.0.0")]
+#endif
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/src/Services/Appflow/AWSSDK.Appflow.NetFramework.csproj b/sdk/src/Services/Appflow/AWSSDK.Appflow.NetFramework.csproj
index 759803f02d99..c1eec74d96a7 100644
--- a/sdk/src/Services/Appflow/AWSSDK.Appflow.NetFramework.csproj
+++ b/sdk/src/Services/Appflow/AWSSDK.Appflow.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);BCL;AWS_ASYNC_API;CODE_ANALYSIS</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(RuleSetFileForBuild)' == 'false' Or '$(RuleSetFileForBuild)' == '' ">
diff --git a/sdk/src/Services/Appflow/AWSSDK.Appflow.NetStandard.csproj b/sdk/src/Services/Appflow/AWSSDK.Appflow.NetStandard.csproj
index 115032fc820c..b02c010dcf84 100644
--- a/sdk/src/Services/Appflow/AWSSDK.Appflow.NetStandard.csproj
+++ b/sdk/src/Services/Appflow/AWSSDK.Appflow.NetStandard.csproj
@@ -22,6 +22,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <!-- Async Enumerable Compatibility -->
diff --git a/sdk/src/Services/Appflow/Generated/AmazonAppflowConfig.cs b/sdk/src/Services/Appflow/Generated/AmazonAppflowConfig.cs
index 354dc6fdbd1f..c59f35ef2407 100644
--- a/sdk/src/Services/Appflow/Generated/AmazonAppflowConfig.cs
+++ b/sdk/src/Services/Appflow/Generated/AmazonAppflowConfig.cs
@@ -34,7 +34,7 @@ namespace Amazon.Appflow
     public partial class AmazonAppflowConfig : ClientConfig
     {
         private static readonly string UserAgentString =
-            InternalSDKUtils.BuildUserAgentString("Appflow", "3.7.300.84");
+            InternalSDKUtils.BuildUserAgentString("Appflow", "4.0.0.0");
 
         private static readonly AmazonAppflowEndpointResolver EndpointResolver =
             new AmazonAppflowEndpointResolver();
diff --git a/sdk/src/Services/Appflow/Properties/AssemblyInfo.cs b/sdk/src/Services/Appflow/Properties/AssemblyInfo.cs
index 5303ad0813e1..867e0c2d09bc 100644
--- a/sdk/src/Services/Appflow/Properties/AssemblyInfo.cs
+++ b/sdk/src/Services/Appflow/Properties/AssemblyInfo.cs
@@ -41,5 +41,9 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.300.84")]
\ No newline at end of file
+#if BCL
+[assembly: AssemblyVersion("4.0")]
+#else
+[assembly: AssemblyVersion("4.0.0.0")]
+#endif
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/src/Services/ApplicationAutoScaling/AWSSDK.ApplicationAutoScaling.NetFramework.csproj b/sdk/src/Services/ApplicationAutoScaling/AWSSDK.ApplicationAutoScaling.NetFramework.csproj
index 44f98c55fe5d..0b21a3514efa 100644
--- a/sdk/src/Services/ApplicationAutoScaling/AWSSDK.ApplicationAutoScaling.NetFramework.csproj
+++ b/sdk/src/Services/ApplicationAutoScaling/AWSSDK.ApplicationAutoScaling.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);BCL;AWS_ASYNC_API;CODE_ANALYSIS</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(RuleSetFileForBuild)' == 'false' Or '$(RuleSetFileForBuild)' == '' ">
diff --git a/sdk/src/Services/ApplicationAutoScaling/AWSSDK.ApplicationAutoScaling.NetStandard.csproj b/sdk/src/Services/ApplicationAutoScaling/AWSSDK.ApplicationAutoScaling.NetStandard.csproj
index 94e0b806fc0d..c4439ce36bc0 100644
--- a/sdk/src/Services/ApplicationAutoScaling/AWSSDK.ApplicationAutoScaling.NetStandard.csproj
+++ b/sdk/src/Services/ApplicationAutoScaling/AWSSDK.ApplicationAutoScaling.NetStandard.csproj
@@ -22,6 +22,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <!-- Async Enumerable Compatibility -->
diff --git a/sdk/src/Services/ApplicationAutoScaling/Generated/AmazonApplicationAutoScalingConfig.cs b/sdk/src/Services/ApplicationAutoScaling/Generated/AmazonApplicationAutoScalingConfig.cs
index cc558fbda21b..09f03cdba902 100644
--- a/sdk/src/Services/ApplicationAutoScaling/Generated/AmazonApplicationAutoScalingConfig.cs
+++ b/sdk/src/Services/ApplicationAutoScaling/Generated/AmazonApplicationAutoScalingConfig.cs
@@ -34,7 +34,7 @@ namespace Amazon.ApplicationAutoScaling
     public partial class AmazonApplicationAutoScalingConfig : ClientConfig
     {
         private static readonly string UserAgentString =
-            InternalSDKUtils.BuildUserAgentString("Application Auto Scaling", "3.7.301.73");
+            InternalSDKUtils.BuildUserAgentString("Application Auto Scaling", "4.0.0.0");
 
         private static readonly AmazonApplicationAutoScalingEndpointResolver EndpointResolver =
             new AmazonApplicationAutoScalingEndpointResolver();
diff --git a/sdk/src/Services/ApplicationAutoScaling/Properties/AssemblyInfo.cs b/sdk/src/Services/ApplicationAutoScaling/Properties/AssemblyInfo.cs
index 8c8164fc5d83..46c042590071 100644
--- a/sdk/src/Services/ApplicationAutoScaling/Properties/AssemblyInfo.cs
+++ b/sdk/src/Services/ApplicationAutoScaling/Properties/AssemblyInfo.cs
@@ -41,5 +41,9 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.301.73")]
\ No newline at end of file
+#if BCL
+[assembly: AssemblyVersion("4.0")]
+#else
+[assembly: AssemblyVersion("4.0.0.0")]
+#endif
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/src/Services/ApplicationCostProfiler/AWSSDK.ApplicationCostProfiler.NetFramework.csproj b/sdk/src/Services/ApplicationCostProfiler/AWSSDK.ApplicationCostProfiler.NetFramework.csproj
index 4bbd260cff09..42beb5302c6b 100644
--- a/sdk/src/Services/ApplicationCostProfiler/AWSSDK.ApplicationCostProfiler.NetFramework.csproj
+++ b/sdk/src/Services/ApplicationCostProfiler/AWSSDK.ApplicationCostProfiler.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);BCL;AWS_ASYNC_API;CODE_ANALYSIS</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(RuleSetFileForBuild)' == 'false' Or '$(RuleSetFileForBuild)' == '' ">
diff --git a/sdk/src/Services/ApplicationCostProfiler/AWSSDK.ApplicationCostProfiler.NetStandard.csproj b/sdk/src/Services/ApplicationCostProfiler/AWSSDK.ApplicationCostProfiler.NetStandard.csproj
index 583646ba9809..56cdaa4f04a5 100644
--- a/sdk/src/Services/ApplicationCostProfiler/AWSSDK.ApplicationCostProfiler.NetStandard.csproj
+++ b/sdk/src/Services/ApplicationCostProfiler/AWSSDK.ApplicationCostProfiler.NetStandard.csproj
@@ -22,6 +22,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <!-- Async Enumerable Compatibility -->
diff --git a/sdk/src/Services/ApplicationCostProfiler/Generated/AmazonApplicationCostProfilerConfig.cs b/sdk/src/Services/ApplicationCostProfiler/Generated/AmazonApplicationCostProfilerConfig.cs
index 9b4de8096673..d681bb1ca1fd 100644
--- a/sdk/src/Services/ApplicationCostProfiler/Generated/AmazonApplicationCostProfilerConfig.cs
+++ b/sdk/src/Services/ApplicationCostProfiler/Generated/AmazonApplicationCostProfilerConfig.cs
@@ -34,7 +34,7 @@ namespace Amazon.ApplicationCostProfiler
     public partial class AmazonApplicationCostProfilerConfig : ClientConfig
     {
         private static readonly string UserAgentString =
-            InternalSDKUtils.BuildUserAgentString("ApplicationCostProfiler", "3.7.300.84");
+            InternalSDKUtils.BuildUserAgentString("ApplicationCostProfiler", "4.0.0.0");
 
         private static readonly AmazonApplicationCostProfilerEndpointResolver EndpointResolver =
             new AmazonApplicationCostProfilerEndpointResolver();
diff --git a/sdk/src/Services/ApplicationCostProfiler/Properties/AssemblyInfo.cs b/sdk/src/Services/ApplicationCostProfiler/Properties/AssemblyInfo.cs
index 6b123b80a42b..a0ede9a0e725 100644
--- a/sdk/src/Services/ApplicationCostProfiler/Properties/AssemblyInfo.cs
+++ b/sdk/src/Services/ApplicationCostProfiler/Properties/AssemblyInfo.cs
@@ -41,5 +41,9 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.300.84")]
\ No newline at end of file
+#if BCL
+[assembly: AssemblyVersion("4.0")]
+#else
+[assembly: AssemblyVersion("4.0.0.0")]
+#endif
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/src/Services/ApplicationDiscoveryService/AWSSDK.ApplicationDiscoveryService.NetFramework.csproj b/sdk/src/Services/ApplicationDiscoveryService/AWSSDK.ApplicationDiscoveryService.NetFramework.csproj
index 8a26b7d91d2c..9b7a9abc5959 100644
--- a/sdk/src/Services/ApplicationDiscoveryService/AWSSDK.ApplicationDiscoveryService.NetFramework.csproj
+++ b/sdk/src/Services/ApplicationDiscoveryService/AWSSDK.ApplicationDiscoveryService.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);BCL;AWS_ASYNC_API;CODE_ANALYSIS</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(RuleSetFileForBuild)' == 'false' Or '$(RuleSetFileForBuild)' == '' ">
diff --git a/sdk/src/Services/ApplicationDiscoveryService/AWSSDK.ApplicationDiscoveryService.NetStandard.csproj b/sdk/src/Services/ApplicationDiscoveryService/AWSSDK.ApplicationDiscoveryService.NetStandard.csproj
index 2adbbda1d66b..25f0ba956198 100644
--- a/sdk/src/Services/ApplicationDiscoveryService/AWSSDK.ApplicationDiscoveryService.NetStandard.csproj
+++ b/sdk/src/Services/ApplicationDiscoveryService/AWSSDK.ApplicationDiscoveryService.NetStandard.csproj
@@ -22,6 +22,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <!-- Async Enumerable Compatibility -->
diff --git a/sdk/src/Services/ApplicationDiscoveryService/Generated/AmazonApplicationDiscoveryServiceConfig.cs b/sdk/src/Services/ApplicationDiscoveryService/Generated/AmazonApplicationDiscoveryServiceConfig.cs
index f999b216ce23..6a781fd655f2 100644
--- a/sdk/src/Services/ApplicationDiscoveryService/Generated/AmazonApplicationDiscoveryServiceConfig.cs
+++ b/sdk/src/Services/ApplicationDiscoveryService/Generated/AmazonApplicationDiscoveryServiceConfig.cs
@@ -34,7 +34,7 @@ namespace Amazon.ApplicationDiscoveryService
     public partial class AmazonApplicationDiscoveryServiceConfig : ClientConfig
     {
         private static readonly string UserAgentString =
-            InternalSDKUtils.BuildUserAgentString("Application Discovery Service", "3.7.300.84");
+            InternalSDKUtils.BuildUserAgentString("Application Discovery Service", "4.0.0.0");
 
         private static readonly AmazonApplicationDiscoveryServiceEndpointResolver EndpointResolver =
             new AmazonApplicationDiscoveryServiceEndpointResolver();
diff --git a/sdk/src/Services/ApplicationDiscoveryService/Properties/AssemblyInfo.cs b/sdk/src/Services/ApplicationDiscoveryService/Properties/AssemblyInfo.cs
index 852aa9b399c1..c63af5e7ac39 100644
--- a/sdk/src/Services/ApplicationDiscoveryService/Properties/AssemblyInfo.cs
+++ b/sdk/src/Services/ApplicationDiscoveryService/Properties/AssemblyInfo.cs
@@ -41,5 +41,9 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.300.84")]
\ No newline at end of file
+#if BCL
+[assembly: AssemblyVersion("4.0")]
+#else
+[assembly: AssemblyVersion("4.0.0.0")]
+#endif
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/src/Services/ApplicationInsights/AWSSDK.ApplicationInsights.NetFramework.csproj b/sdk/src/Services/ApplicationInsights/AWSSDK.ApplicationInsights.NetFramework.csproj
index f2f49501d8a0..95f5d72cf848 100644
--- a/sdk/src/Services/ApplicationInsights/AWSSDK.ApplicationInsights.NetFramework.csproj
+++ b/sdk/src/Services/ApplicationInsights/AWSSDK.ApplicationInsights.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);BCL;AWS_ASYNC_API;CODE_ANALYSIS</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(RuleSetFileForBuild)' == 'false' Or '$(RuleSetFileForBuild)' == '' ">
diff --git a/sdk/src/Services/ApplicationInsights/AWSSDK.ApplicationInsights.NetStandard.csproj b/sdk/src/Services/ApplicationInsights/AWSSDK.ApplicationInsights.NetStandard.csproj
index 46acc7722ddd..16d75c694b80 100644
--- a/sdk/src/Services/ApplicationInsights/AWSSDK.ApplicationInsights.NetStandard.csproj
+++ b/sdk/src/Services/ApplicationInsights/AWSSDK.ApplicationInsights.NetStandard.csproj
@@ -22,6 +22,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <!-- Async Enumerable Compatibility -->
diff --git a/sdk/src/Services/ApplicationInsights/Generated/AmazonApplicationInsightsConfig.cs b/sdk/src/Services/ApplicationInsights/Generated/AmazonApplicationInsightsConfig.cs
index 4a98a0bbde14..734bb7ef3227 100644
--- a/sdk/src/Services/ApplicationInsights/Generated/AmazonApplicationInsightsConfig.cs
+++ b/sdk/src/Services/ApplicationInsights/Generated/AmazonApplicationInsightsConfig.cs
@@ -34,7 +34,7 @@ namespace Amazon.ApplicationInsights
     public partial class AmazonApplicationInsightsConfig : ClientConfig
     {
         private static readonly string UserAgentString =
-            InternalSDKUtils.BuildUserAgentString("Application Insights", "3.7.300.84");
+            InternalSDKUtils.BuildUserAgentString("Application Insights", "4.0.0.0");
 
         private static readonly AmazonApplicationInsightsEndpointResolver EndpointResolver =
             new AmazonApplicationInsightsEndpointResolver();
diff --git a/sdk/src/Services/ApplicationInsights/Properties/AssemblyInfo.cs b/sdk/src/Services/ApplicationInsights/Properties/AssemblyInfo.cs
index 6409da9c2b4a..0852b23703f7 100644
--- a/sdk/src/Services/ApplicationInsights/Properties/AssemblyInfo.cs
+++ b/sdk/src/Services/ApplicationInsights/Properties/AssemblyInfo.cs
@@ -41,5 +41,9 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.300.84")]
\ No newline at end of file
+#if BCL
+[assembly: AssemblyVersion("4.0")]
+#else
+[assembly: AssemblyVersion("4.0.0.0")]
+#endif
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/src/Services/Artifact/AWSSDK.Artifact.NetFramework.csproj b/sdk/src/Services/Artifact/AWSSDK.Artifact.NetFramework.csproj
index eaa394162d8c..c6cfdadf8ed6 100644
--- a/sdk/src/Services/Artifact/AWSSDK.Artifact.NetFramework.csproj
+++ b/sdk/src/Services/Artifact/AWSSDK.Artifact.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);BCL;AWS_ASYNC_API;CODE_ANALYSIS</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(RuleSetFileForBuild)' == 'false' Or '$(RuleSetFileForBuild)' == '' ">
diff --git a/sdk/src/Services/Artifact/AWSSDK.Artifact.NetStandard.csproj b/sdk/src/Services/Artifact/AWSSDK.Artifact.NetStandard.csproj
index c376ac019765..41462988aa49 100644
--- a/sdk/src/Services/Artifact/AWSSDK.Artifact.NetStandard.csproj
+++ b/sdk/src/Services/Artifact/AWSSDK.Artifact.NetStandard.csproj
@@ -22,6 +22,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <!-- Async Enumerable Compatibility -->
diff --git a/sdk/src/Services/Artifact/Generated/AmazonArtifactConfig.cs b/sdk/src/Services/Artifact/Generated/AmazonArtifactConfig.cs
index 9941894c2d9d..b90e263f327a 100644
--- a/sdk/src/Services/Artifact/Generated/AmazonArtifactConfig.cs
+++ b/sdk/src/Services/Artifact/Generated/AmazonArtifactConfig.cs
@@ -34,7 +34,7 @@ namespace Amazon.Artifact
     public partial class AmazonArtifactConfig : ClientConfig
     {
         private static readonly string UserAgentString =
-            InternalSDKUtils.BuildUserAgentString("Artifact", "3.7.300.33");
+            InternalSDKUtils.BuildUserAgentString("Artifact", "4.0.0.0");
 
         private static readonly AmazonArtifactEndpointResolver EndpointResolver =
             new AmazonArtifactEndpointResolver();
diff --git a/sdk/src/Services/Artifact/Properties/AssemblyInfo.cs b/sdk/src/Services/Artifact/Properties/AssemblyInfo.cs
index 90d8f604eff1..b319a25693e3 100644
--- a/sdk/src/Services/Artifact/Properties/AssemblyInfo.cs
+++ b/sdk/src/Services/Artifact/Properties/AssemblyInfo.cs
@@ -41,5 +41,9 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.300.33")]
\ No newline at end of file
+#if BCL
+[assembly: AssemblyVersion("4.0")]
+#else
+[assembly: AssemblyVersion("4.0.0.0")]
+#endif
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/src/Services/Athena/AWSSDK.Athena.NetFramework.csproj b/sdk/src/Services/Athena/AWSSDK.Athena.NetFramework.csproj
index 9017621a2563..d602e49713f1 100644
--- a/sdk/src/Services/Athena/AWSSDK.Athena.NetFramework.csproj
+++ b/sdk/src/Services/Athena/AWSSDK.Athena.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);BCL;AWS_ASYNC_API;CODE_ANALYSIS</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(RuleSetFileForBuild)' == 'false' Or '$(RuleSetFileForBuild)' == '' ">
diff --git a/sdk/src/Services/Athena/AWSSDK.Athena.NetStandard.csproj b/sdk/src/Services/Athena/AWSSDK.Athena.NetStandard.csproj
index ef2a5f1ffab7..8308a85f7e24 100644
--- a/sdk/src/Services/Athena/AWSSDK.Athena.NetStandard.csproj
+++ b/sdk/src/Services/Athena/AWSSDK.Athena.NetStandard.csproj
@@ -22,6 +22,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <!-- Async Enumerable Compatibility -->
diff --git a/sdk/src/Services/Athena/Generated/AmazonAthenaConfig.cs b/sdk/src/Services/Athena/Generated/AmazonAthenaConfig.cs
index 540a4d454c7e..134b124183a6 100644
--- a/sdk/src/Services/Athena/Generated/AmazonAthenaConfig.cs
+++ b/sdk/src/Services/Athena/Generated/AmazonAthenaConfig.cs
@@ -34,7 +34,7 @@ namespace Amazon.Athena
     public partial class AmazonAthenaConfig : ClientConfig
     {
         private static readonly string UserAgentString =
-            InternalSDKUtils.BuildUserAgentString("Athena", "3.7.303.45");
+            InternalSDKUtils.BuildUserAgentString("Athena", "4.0.0.0");
 
         private static readonly AmazonAthenaEndpointResolver EndpointResolver =
             new AmazonAthenaEndpointResolver();
diff --git a/sdk/src/Services/Athena/Properties/AssemblyInfo.cs b/sdk/src/Services/Athena/Properties/AssemblyInfo.cs
index bf3194bcd59f..bf34d9dfb3f7 100644
--- a/sdk/src/Services/Athena/Properties/AssemblyInfo.cs
+++ b/sdk/src/Services/Athena/Properties/AssemblyInfo.cs
@@ -41,5 +41,9 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.303.45")]
\ No newline at end of file
+#if BCL
+[assembly: AssemblyVersion("4.0")]
+#else
+[assembly: AssemblyVersion("4.0.0.0")]
+#endif
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/src/Services/AuditManager/AWSSDK.AuditManager.NetFramework.csproj b/sdk/src/Services/AuditManager/AWSSDK.AuditManager.NetFramework.csproj
index e80e6549b196..02ed41a40514 100644
--- a/sdk/src/Services/AuditManager/AWSSDK.AuditManager.NetFramework.csproj
+++ b/sdk/src/Services/AuditManager/AWSSDK.AuditManager.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);BCL;AWS_ASYNC_API;CODE_ANALYSIS</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(RuleSetFileForBuild)' == 'false' Or '$(RuleSetFileForBuild)' == '' ">
diff --git a/sdk/src/Services/AuditManager/AWSSDK.AuditManager.NetStandard.csproj b/sdk/src/Services/AuditManager/AWSSDK.AuditManager.NetStandard.csproj
index 67b7a85606b9..3f4cc9bef3ca 100644
--- a/sdk/src/Services/AuditManager/AWSSDK.AuditManager.NetStandard.csproj
+++ b/sdk/src/Services/AuditManager/AWSSDK.AuditManager.NetStandard.csproj
@@ -22,6 +22,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <!-- Async Enumerable Compatibility -->
diff --git a/sdk/src/Services/AuditManager/Generated/AmazonAuditManagerConfig.cs b/sdk/src/Services/AuditManager/Generated/AmazonAuditManagerConfig.cs
index e2f3ecd95867..fbc54967238c 100644
--- a/sdk/src/Services/AuditManager/Generated/AmazonAuditManagerConfig.cs
+++ b/sdk/src/Services/AuditManager/Generated/AmazonAuditManagerConfig.cs
@@ -34,7 +34,7 @@ namespace Amazon.AuditManager
     public partial class AmazonAuditManagerConfig : ClientConfig
     {
         private static readonly string UserAgentString =
-            InternalSDKUtils.BuildUserAgentString("AuditManager", "3.7.300.84");
+            InternalSDKUtils.BuildUserAgentString("AuditManager", "4.0.0.0");
 
         private static readonly AmazonAuditManagerEndpointResolver EndpointResolver =
             new AmazonAuditManagerEndpointResolver();
diff --git a/sdk/src/Services/AuditManager/Properties/AssemblyInfo.cs b/sdk/src/Services/AuditManager/Properties/AssemblyInfo.cs
index 72864186e49b..64ef58bb7d8a 100644
--- a/sdk/src/Services/AuditManager/Properties/AssemblyInfo.cs
+++ b/sdk/src/Services/AuditManager/Properties/AssemblyInfo.cs
@@ -41,5 +41,9 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.300.84")]
\ No newline at end of file
+#if BCL
+[assembly: AssemblyVersion("4.0")]
+#else
+[assembly: AssemblyVersion("4.0.0.0")]
+#endif
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/src/Services/AugmentedAIRuntime/AWSSDK.AugmentedAIRuntime.NetFramework.csproj b/sdk/src/Services/AugmentedAIRuntime/AWSSDK.AugmentedAIRuntime.NetFramework.csproj
index f74d8cb3775b..c9e09395b742 100644
--- a/sdk/src/Services/AugmentedAIRuntime/AWSSDK.AugmentedAIRuntime.NetFramework.csproj
+++ b/sdk/src/Services/AugmentedAIRuntime/AWSSDK.AugmentedAIRuntime.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);BCL;AWS_ASYNC_API;CODE_ANALYSIS</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(RuleSetFileForBuild)' == 'false' Or '$(RuleSetFileForBuild)' == '' ">
diff --git a/sdk/src/Services/AugmentedAIRuntime/AWSSDK.AugmentedAIRuntime.NetStandard.csproj b/sdk/src/Services/AugmentedAIRuntime/AWSSDK.AugmentedAIRuntime.NetStandard.csproj
index 28790530d15c..2806d6d018ac 100644
--- a/sdk/src/Services/AugmentedAIRuntime/AWSSDK.AugmentedAIRuntime.NetStandard.csproj
+++ b/sdk/src/Services/AugmentedAIRuntime/AWSSDK.AugmentedAIRuntime.NetStandard.csproj
@@ -22,6 +22,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <!-- Async Enumerable Compatibility -->
diff --git a/sdk/src/Services/AugmentedAIRuntime/Generated/AmazonAugmentedAIRuntimeConfig.cs b/sdk/src/Services/AugmentedAIRuntime/Generated/AmazonAugmentedAIRuntimeConfig.cs
index cb008486d9d0..b02bb6a458c8 100644
--- a/sdk/src/Services/AugmentedAIRuntime/Generated/AmazonAugmentedAIRuntimeConfig.cs
+++ b/sdk/src/Services/AugmentedAIRuntime/Generated/AmazonAugmentedAIRuntimeConfig.cs
@@ -34,7 +34,7 @@ namespace Amazon.AugmentedAIRuntime
     public partial class AmazonAugmentedAIRuntimeConfig : ClientConfig
     {
         private static readonly string UserAgentString =
-            InternalSDKUtils.BuildUserAgentString("SageMaker A2I Runtime", "3.7.300.84");
+            InternalSDKUtils.BuildUserAgentString("SageMaker A2I Runtime", "4.0.0.0");
 
         private static readonly AmazonAugmentedAIRuntimeEndpointResolver EndpointResolver =
             new AmazonAugmentedAIRuntimeEndpointResolver();
diff --git a/sdk/src/Services/AugmentedAIRuntime/Properties/AssemblyInfo.cs b/sdk/src/Services/AugmentedAIRuntime/Properties/AssemblyInfo.cs
index 3afe4b6dc0f8..ace584bef1fa 100644
--- a/sdk/src/Services/AugmentedAIRuntime/Properties/AssemblyInfo.cs
+++ b/sdk/src/Services/AugmentedAIRuntime/Properties/AssemblyInfo.cs
@@ -41,5 +41,9 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.300.84")]
\ No newline at end of file
+#if BCL
+[assembly: AssemblyVersion("4.0")]
+#else
+[assembly: AssemblyVersion("4.0.0.0")]
+#endif
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/src/Services/AutoScaling/AWSSDK.AutoScaling.NetFramework.csproj b/sdk/src/Services/AutoScaling/AWSSDK.AutoScaling.NetFramework.csproj
index 7105875a4987..73df8ef1f681 100644
--- a/sdk/src/Services/AutoScaling/AWSSDK.AutoScaling.NetFramework.csproj
+++ b/sdk/src/Services/AutoScaling/AWSSDK.AutoScaling.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);BCL;AWS_ASYNC_API;CODE_ANALYSIS</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(RuleSetFileForBuild)' == 'false' Or '$(RuleSetFileForBuild)' == '' ">
diff --git a/sdk/src/Services/AutoScaling/AWSSDK.AutoScaling.NetStandard.csproj b/sdk/src/Services/AutoScaling/AWSSDK.AutoScaling.NetStandard.csproj
index 18dca2042e75..91d4b0b08e69 100644
--- a/sdk/src/Services/AutoScaling/AWSSDK.AutoScaling.NetStandard.csproj
+++ b/sdk/src/Services/AutoScaling/AWSSDK.AutoScaling.NetStandard.csproj
@@ -22,6 +22,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <!-- Async Enumerable Compatibility -->
diff --git a/sdk/src/Services/AutoScaling/Generated/AmazonAutoScalingConfig.cs b/sdk/src/Services/AutoScaling/Generated/AmazonAutoScalingConfig.cs
index 2a451a3cc87c..072ac3d988b6 100644
--- a/sdk/src/Services/AutoScaling/Generated/AmazonAutoScalingConfig.cs
+++ b/sdk/src/Services/AutoScaling/Generated/AmazonAutoScalingConfig.cs
@@ -34,7 +34,7 @@ namespace Amazon.AutoScaling
     public partial class AmazonAutoScalingConfig : ClientConfig
     {
         private static readonly string UserAgentString =
-            InternalSDKUtils.BuildUserAgentString("Auto Scaling", "3.7.302.43");
+            InternalSDKUtils.BuildUserAgentString("Auto Scaling", "4.0.0.0");
 
         private static readonly AmazonAutoScalingEndpointResolver EndpointResolver =
             new AmazonAutoScalingEndpointResolver();
diff --git a/sdk/src/Services/AutoScaling/Properties/AssemblyInfo.cs b/sdk/src/Services/AutoScaling/Properties/AssemblyInfo.cs
index c25b2ad22d69..6a91d6fddce0 100644
--- a/sdk/src/Services/AutoScaling/Properties/AssemblyInfo.cs
+++ b/sdk/src/Services/AutoScaling/Properties/AssemblyInfo.cs
@@ -41,5 +41,9 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.302.43")]
\ No newline at end of file
+#if BCL
+[assembly: AssemblyVersion("4.0")]
+#else
+[assembly: AssemblyVersion("4.0.0.0")]
+#endif
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/src/Services/AutoScalingPlans/AWSSDK.AutoScalingPlans.NetFramework.csproj b/sdk/src/Services/AutoScalingPlans/AWSSDK.AutoScalingPlans.NetFramework.csproj
index 88e33a99ea78..6e6b629f133a 100644
--- a/sdk/src/Services/AutoScalingPlans/AWSSDK.AutoScalingPlans.NetFramework.csproj
+++ b/sdk/src/Services/AutoScalingPlans/AWSSDK.AutoScalingPlans.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);BCL;AWS_ASYNC_API;CODE_ANALYSIS</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(RuleSetFileForBuild)' == 'false' Or '$(RuleSetFileForBuild)' == '' ">
diff --git a/sdk/src/Services/AutoScalingPlans/AWSSDK.AutoScalingPlans.NetStandard.csproj b/sdk/src/Services/AutoScalingPlans/AWSSDK.AutoScalingPlans.NetStandard.csproj
index 46cbd88fb5fe..ca83dda75547 100644
--- a/sdk/src/Services/AutoScalingPlans/AWSSDK.AutoScalingPlans.NetStandard.csproj
+++ b/sdk/src/Services/AutoScalingPlans/AWSSDK.AutoScalingPlans.NetStandard.csproj
@@ -22,6 +22,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <!-- Async Enumerable Compatibility -->
diff --git a/sdk/src/Services/AutoScalingPlans/Generated/AmazonAutoScalingPlansConfig.cs b/sdk/src/Services/AutoScalingPlans/Generated/AmazonAutoScalingPlansConfig.cs
index 6ab0236bdab3..4ae787cf0a2d 100644
--- a/sdk/src/Services/AutoScalingPlans/Generated/AmazonAutoScalingPlansConfig.cs
+++ b/sdk/src/Services/AutoScalingPlans/Generated/AmazonAutoScalingPlansConfig.cs
@@ -34,7 +34,7 @@ namespace Amazon.AutoScalingPlans
     public partial class AmazonAutoScalingPlansConfig : ClientConfig
     {
         private static readonly string UserAgentString =
-            InternalSDKUtils.BuildUserAgentString("Auto Scaling Plans", "3.7.300.84");
+            InternalSDKUtils.BuildUserAgentString("Auto Scaling Plans", "4.0.0.0");
 
         private static readonly AmazonAutoScalingPlansEndpointResolver EndpointResolver =
             new AmazonAutoScalingPlansEndpointResolver();
diff --git a/sdk/src/Services/AutoScalingPlans/Properties/AssemblyInfo.cs b/sdk/src/Services/AutoScalingPlans/Properties/AssemblyInfo.cs
index 132ee740dd9b..6cf21b7d6efc 100644
--- a/sdk/src/Services/AutoScalingPlans/Properties/AssemblyInfo.cs
+++ b/sdk/src/Services/AutoScalingPlans/Properties/AssemblyInfo.cs
@@ -41,5 +41,9 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.300.84")]
\ No newline at end of file
+#if BCL
+[assembly: AssemblyVersion("4.0")]
+#else
+[assembly: AssemblyVersion("4.0.0.0")]
+#endif
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/src/Services/B2bi/AWSSDK.B2bi.NetFramework.csproj b/sdk/src/Services/B2bi/AWSSDK.B2bi.NetFramework.csproj
index 8aeb674d8f30..0e31bd9b6f3b 100644
--- a/sdk/src/Services/B2bi/AWSSDK.B2bi.NetFramework.csproj
+++ b/sdk/src/Services/B2bi/AWSSDK.B2bi.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);BCL;AWS_ASYNC_API;CODE_ANALYSIS</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(RuleSetFileForBuild)' == 'false' Or '$(RuleSetFileForBuild)' == '' ">
diff --git a/sdk/src/Services/B2bi/AWSSDK.B2bi.NetStandard.csproj b/sdk/src/Services/B2bi/AWSSDK.B2bi.NetStandard.csproj
index dcc28c208633..f1212614d893 100644
--- a/sdk/src/Services/B2bi/AWSSDK.B2bi.NetStandard.csproj
+++ b/sdk/src/Services/B2bi/AWSSDK.B2bi.NetStandard.csproj
@@ -22,6 +22,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <!-- Async Enumerable Compatibility -->
diff --git a/sdk/src/Services/B2bi/Generated/AmazonB2biConfig.cs b/sdk/src/Services/B2bi/Generated/AmazonB2biConfig.cs
index 9df681d931f0..562c0d8b4ee8 100644
--- a/sdk/src/Services/B2bi/Generated/AmazonB2biConfig.cs
+++ b/sdk/src/Services/B2bi/Generated/AmazonB2biConfig.cs
@@ -34,7 +34,7 @@ namespace Amazon.B2bi
     public partial class AmazonB2biConfig : ClientConfig
     {
         private static readonly string UserAgentString =
-            InternalSDKUtils.BuildUserAgentString("b2bi", "3.7.303.15");
+            InternalSDKUtils.BuildUserAgentString("b2bi", "4.0.0.0");
 
         private static readonly AmazonB2biEndpointResolver EndpointResolver =
             new AmazonB2biEndpointResolver();
diff --git a/sdk/src/Services/B2bi/Properties/AssemblyInfo.cs b/sdk/src/Services/B2bi/Properties/AssemblyInfo.cs
index bf8d78a746b4..8d9c2aa83044 100644
--- a/sdk/src/Services/B2bi/Properties/AssemblyInfo.cs
+++ b/sdk/src/Services/B2bi/Properties/AssemblyInfo.cs
@@ -41,5 +41,9 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.303.15")]
\ No newline at end of file
+#if BCL
+[assembly: AssemblyVersion("4.0")]
+#else
+[assembly: AssemblyVersion("4.0.0.0")]
+#endif
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/src/Services/BCMDataExports/AWSSDK.BCMDataExports.NetFramework.csproj b/sdk/src/Services/BCMDataExports/AWSSDK.BCMDataExports.NetFramework.csproj
index 0f588514576d..7ac5163dad9c 100644
--- a/sdk/src/Services/BCMDataExports/AWSSDK.BCMDataExports.NetFramework.csproj
+++ b/sdk/src/Services/BCMDataExports/AWSSDK.BCMDataExports.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);BCL;AWS_ASYNC_API;CODE_ANALYSIS</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(RuleSetFileForBuild)' == 'false' Or '$(RuleSetFileForBuild)' == '' ">
diff --git a/sdk/src/Services/BCMDataExports/AWSSDK.BCMDataExports.NetStandard.csproj b/sdk/src/Services/BCMDataExports/AWSSDK.BCMDataExports.NetStandard.csproj
index 48923df7c491..a77457b98705 100644
--- a/sdk/src/Services/BCMDataExports/AWSSDK.BCMDataExports.NetStandard.csproj
+++ b/sdk/src/Services/BCMDataExports/AWSSDK.BCMDataExports.NetStandard.csproj
@@ -22,6 +22,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <!-- Async Enumerable Compatibility -->
diff --git a/sdk/src/Services/BCMDataExports/Generated/AmazonBCMDataExportsConfig.cs b/sdk/src/Services/BCMDataExports/Generated/AmazonBCMDataExportsConfig.cs
index c6ef075b81ce..b45fa267571b 100644
--- a/sdk/src/Services/BCMDataExports/Generated/AmazonBCMDataExportsConfig.cs
+++ b/sdk/src/Services/BCMDataExports/Generated/AmazonBCMDataExportsConfig.cs
@@ -34,7 +34,7 @@ namespace Amazon.BCMDataExports
     public partial class AmazonBCMDataExportsConfig : ClientConfig
     {
         private static readonly string UserAgentString =
-            InternalSDKUtils.BuildUserAgentString("BCM Data Exports", "3.7.300.76");
+            InternalSDKUtils.BuildUserAgentString("BCM Data Exports", "4.0.0.0");
 
         private static readonly AmazonBCMDataExportsEndpointResolver EndpointResolver =
             new AmazonBCMDataExportsEndpointResolver();
diff --git a/sdk/src/Services/BCMDataExports/Properties/AssemblyInfo.cs b/sdk/src/Services/BCMDataExports/Properties/AssemblyInfo.cs
index 2d4b6b483161..72470873b2ef 100644
--- a/sdk/src/Services/BCMDataExports/Properties/AssemblyInfo.cs
+++ b/sdk/src/Services/BCMDataExports/Properties/AssemblyInfo.cs
@@ -41,5 +41,9 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.300.76")]
\ No newline at end of file
+#if BCL
+[assembly: AssemblyVersion("4.0")]
+#else
+[assembly: AssemblyVersion("4.0.0.0")]
+#endif
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/src/Services/Backup/AWSSDK.Backup.NetFramework.csproj b/sdk/src/Services/Backup/AWSSDK.Backup.NetFramework.csproj
index e0f291442c16..b153c0c830a7 100644
--- a/sdk/src/Services/Backup/AWSSDK.Backup.NetFramework.csproj
+++ b/sdk/src/Services/Backup/AWSSDK.Backup.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);BCL;AWS_ASYNC_API;CODE_ANALYSIS</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(RuleSetFileForBuild)' == 'false' Or '$(RuleSetFileForBuild)' == '' ">
diff --git a/sdk/src/Services/Backup/AWSSDK.Backup.NetStandard.csproj b/sdk/src/Services/Backup/AWSSDK.Backup.NetStandard.csproj
index 789f22ecf026..fd4679250bf5 100644
--- a/sdk/src/Services/Backup/AWSSDK.Backup.NetStandard.csproj
+++ b/sdk/src/Services/Backup/AWSSDK.Backup.NetStandard.csproj
@@ -22,6 +22,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <!-- Async Enumerable Compatibility -->
diff --git a/sdk/src/Services/Backup/Generated/AmazonBackupConfig.cs b/sdk/src/Services/Backup/Generated/AmazonBackupConfig.cs
index f3505f73f426..7f7546a77736 100644
--- a/sdk/src/Services/Backup/Generated/AmazonBackupConfig.cs
+++ b/sdk/src/Services/Backup/Generated/AmazonBackupConfig.cs
@@ -34,7 +34,7 @@ namespace Amazon.Backup
     public partial class AmazonBackupConfig : ClientConfig
     {
         private static readonly string UserAgentString =
-            InternalSDKUtils.BuildUserAgentString("Backup", "3.7.304.26");
+            InternalSDKUtils.BuildUserAgentString("Backup", "4.0.0.0");
 
         private static readonly AmazonBackupEndpointResolver EndpointResolver =
             new AmazonBackupEndpointResolver();
diff --git a/sdk/src/Services/Backup/Properties/AssemblyInfo.cs b/sdk/src/Services/Backup/Properties/AssemblyInfo.cs
index c1d394d1c91c..2c5170089544 100644
--- a/sdk/src/Services/Backup/Properties/AssemblyInfo.cs
+++ b/sdk/src/Services/Backup/Properties/AssemblyInfo.cs
@@ -41,5 +41,9 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.304.26")]
\ No newline at end of file
+#if BCL
+[assembly: AssemblyVersion("4.0")]
+#else
+[assembly: AssemblyVersion("4.0.0.0")]
+#endif
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/src/Services/BackupGateway/AWSSDK.BackupGateway.NetFramework.csproj b/sdk/src/Services/BackupGateway/AWSSDK.BackupGateway.NetFramework.csproj
index 4927339e6f1c..453b96144120 100644
--- a/sdk/src/Services/BackupGateway/AWSSDK.BackupGateway.NetFramework.csproj
+++ b/sdk/src/Services/BackupGateway/AWSSDK.BackupGateway.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);BCL;AWS_ASYNC_API;CODE_ANALYSIS</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(RuleSetFileForBuild)' == 'false' Or '$(RuleSetFileForBuild)' == '' ">
diff --git a/sdk/src/Services/BackupGateway/AWSSDK.BackupGateway.NetStandard.csproj b/sdk/src/Services/BackupGateway/AWSSDK.BackupGateway.NetStandard.csproj
index 9b2f1e076ad0..fe6407c08cba 100644
--- a/sdk/src/Services/BackupGateway/AWSSDK.BackupGateway.NetStandard.csproj
+++ b/sdk/src/Services/BackupGateway/AWSSDK.BackupGateway.NetStandard.csproj
@@ -22,6 +22,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <!-- Async Enumerable Compatibility -->
diff --git a/sdk/src/Services/BackupGateway/Generated/AmazonBackupGatewayConfig.cs b/sdk/src/Services/BackupGateway/Generated/AmazonBackupGatewayConfig.cs
index 9ac39d95702b..af320bb57794 100644
--- a/sdk/src/Services/BackupGateway/Generated/AmazonBackupGatewayConfig.cs
+++ b/sdk/src/Services/BackupGateway/Generated/AmazonBackupGatewayConfig.cs
@@ -34,7 +34,7 @@ namespace Amazon.BackupGateway
     public partial class AmazonBackupGatewayConfig : ClientConfig
     {
         private static readonly string UserAgentString =
-            InternalSDKUtils.BuildUserAgentString("Backup Gateway", "3.7.300.84");
+            InternalSDKUtils.BuildUserAgentString("Backup Gateway", "4.0.0.0");
 
         private static readonly AmazonBackupGatewayEndpointResolver EndpointResolver =
             new AmazonBackupGatewayEndpointResolver();
diff --git a/sdk/src/Services/BackupGateway/Properties/AssemblyInfo.cs b/sdk/src/Services/BackupGateway/Properties/AssemblyInfo.cs
index 4720151d5345..792e485b17eb 100644
--- a/sdk/src/Services/BackupGateway/Properties/AssemblyInfo.cs
+++ b/sdk/src/Services/BackupGateway/Properties/AssemblyInfo.cs
@@ -41,5 +41,9 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.300.84")]
\ No newline at end of file
+#if BCL
+[assembly: AssemblyVersion("4.0")]
+#else
+[assembly: AssemblyVersion("4.0.0.0")]
+#endif
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/src/Services/BackupStorage/AWSSDK.BackupStorage.NetFramework.csproj b/sdk/src/Services/BackupStorage/AWSSDK.BackupStorage.NetFramework.csproj
index fdddb4e3b1e6..0334922ef421 100644
--- a/sdk/src/Services/BackupStorage/AWSSDK.BackupStorage.NetFramework.csproj
+++ b/sdk/src/Services/BackupStorage/AWSSDK.BackupStorage.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);BCL;AWS_ASYNC_API;CODE_ANALYSIS</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(RuleSetFileForBuild)' == 'false' Or '$(RuleSetFileForBuild)' == '' ">
diff --git a/sdk/src/Services/BackupStorage/AWSSDK.BackupStorage.NetStandard.csproj b/sdk/src/Services/BackupStorage/AWSSDK.BackupStorage.NetStandard.csproj
index 6beb32ef8337..112fc6411f47 100644
--- a/sdk/src/Services/BackupStorage/AWSSDK.BackupStorage.NetStandard.csproj
+++ b/sdk/src/Services/BackupStorage/AWSSDK.BackupStorage.NetStandard.csproj
@@ -22,6 +22,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <!-- Async Enumerable Compatibility -->
diff --git a/sdk/src/Services/BackupStorage/Generated/AmazonBackupStorageConfig.cs b/sdk/src/Services/BackupStorage/Generated/AmazonBackupStorageConfig.cs
index 4a79b0e4f8c0..73d9f22da214 100644
--- a/sdk/src/Services/BackupStorage/Generated/AmazonBackupStorageConfig.cs
+++ b/sdk/src/Services/BackupStorage/Generated/AmazonBackupStorageConfig.cs
@@ -34,7 +34,7 @@ namespace Amazon.BackupStorage
     public partial class AmazonBackupStorageConfig : ClientConfig
     {
         private static readonly string UserAgentString =
-            InternalSDKUtils.BuildUserAgentString("BackupStorage", "3.7.300.84");
+            InternalSDKUtils.BuildUserAgentString("BackupStorage", "4.0.0.0");
 
         private static readonly AmazonBackupStorageEndpointResolver EndpointResolver =
             new AmazonBackupStorageEndpointResolver();
diff --git a/sdk/src/Services/BackupStorage/Properties/AssemblyInfo.cs b/sdk/src/Services/BackupStorage/Properties/AssemblyInfo.cs
index 23ca6ee0b878..19d4cd797c9f 100644
--- a/sdk/src/Services/BackupStorage/Properties/AssemblyInfo.cs
+++ b/sdk/src/Services/BackupStorage/Properties/AssemblyInfo.cs
@@ -41,5 +41,9 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.300.84")]
\ No newline at end of file
+#if BCL
+[assembly: AssemblyVersion("4.0")]
+#else
+[assembly: AssemblyVersion("4.0.0.0")]
+#endif
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/src/Services/Batch/AWSSDK.Batch.NetFramework.csproj b/sdk/src/Services/Batch/AWSSDK.Batch.NetFramework.csproj
index 6fc02b87173e..9e2aa8aaf891 100644
--- a/sdk/src/Services/Batch/AWSSDK.Batch.NetFramework.csproj
+++ b/sdk/src/Services/Batch/AWSSDK.Batch.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);BCL;AWS_ASYNC_API;CODE_ANALYSIS</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(RuleSetFileForBuild)' == 'false' Or '$(RuleSetFileForBuild)' == '' ">
diff --git a/sdk/src/Services/Batch/AWSSDK.Batch.NetStandard.csproj b/sdk/src/Services/Batch/AWSSDK.Batch.NetStandard.csproj
index ea5014c9f15e..779912e43491 100644
--- a/sdk/src/Services/Batch/AWSSDK.Batch.NetStandard.csproj
+++ b/sdk/src/Services/Batch/AWSSDK.Batch.NetStandard.csproj
@@ -22,6 +22,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <!-- Async Enumerable Compatibility -->
diff --git a/sdk/src/Services/Batch/Generated/AmazonBatchConfig.cs b/sdk/src/Services/Batch/Generated/AmazonBatchConfig.cs
index 78252d1557d9..eae47cdf600a 100644
--- a/sdk/src/Services/Batch/Generated/AmazonBatchConfig.cs
+++ b/sdk/src/Services/Batch/Generated/AmazonBatchConfig.cs
@@ -34,7 +34,7 @@ namespace Amazon.Batch
     public partial class AmazonBatchConfig : ClientConfig
     {
         private static readonly string UserAgentString =
-            InternalSDKUtils.BuildUserAgentString("Batch", "3.7.305.10");
+            InternalSDKUtils.BuildUserAgentString("Batch", "4.0.0.0");
 
         private static readonly AmazonBatchEndpointResolver EndpointResolver =
             new AmazonBatchEndpointResolver();
diff --git a/sdk/src/Services/Batch/Properties/AssemblyInfo.cs b/sdk/src/Services/Batch/Properties/AssemblyInfo.cs
index d03aea4c3db9..c5f26eec5422 100644
--- a/sdk/src/Services/Batch/Properties/AssemblyInfo.cs
+++ b/sdk/src/Services/Batch/Properties/AssemblyInfo.cs
@@ -41,5 +41,9 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.305.10")]
\ No newline at end of file
+#if BCL
+[assembly: AssemblyVersion("4.0")]
+#else
+[assembly: AssemblyVersion("4.0.0.0")]
+#endif
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/src/Services/Bedrock/AWSSDK.Bedrock.NetFramework.csproj b/sdk/src/Services/Bedrock/AWSSDK.Bedrock.NetFramework.csproj
index c4df7a9f4f03..61fe131da8fd 100644
--- a/sdk/src/Services/Bedrock/AWSSDK.Bedrock.NetFramework.csproj
+++ b/sdk/src/Services/Bedrock/AWSSDK.Bedrock.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);BCL;AWS_ASYNC_API;CODE_ANALYSIS</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(RuleSetFileForBuild)' == 'false' Or '$(RuleSetFileForBuild)' == '' ">
diff --git a/sdk/src/Services/Bedrock/AWSSDK.Bedrock.NetStandard.csproj b/sdk/src/Services/Bedrock/AWSSDK.Bedrock.NetStandard.csproj
index 4cac3fada091..99dede574474 100644
--- a/sdk/src/Services/Bedrock/AWSSDK.Bedrock.NetStandard.csproj
+++ b/sdk/src/Services/Bedrock/AWSSDK.Bedrock.NetStandard.csproj
@@ -22,6 +22,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <!-- Async Enumerable Compatibility -->
diff --git a/sdk/src/Services/Bedrock/Generated/AmazonBedrockConfig.cs b/sdk/src/Services/Bedrock/Generated/AmazonBedrockConfig.cs
index 373ec973b9d1..9aedcc908d9c 100644
--- a/sdk/src/Services/Bedrock/Generated/AmazonBedrockConfig.cs
+++ b/sdk/src/Services/Bedrock/Generated/AmazonBedrockConfig.cs
@@ -34,7 +34,7 @@ namespace Amazon.Bedrock
     public partial class AmazonBedrockConfig : ClientConfig
     {
         private static readonly string UserAgentString =
-            InternalSDKUtils.BuildUserAgentString("Bedrock", "3.7.302.4");
+            InternalSDKUtils.BuildUserAgentString("Bedrock", "4.0.0.0");
 
         private static readonly AmazonBedrockEndpointResolver EndpointResolver =
             new AmazonBedrockEndpointResolver();
diff --git a/sdk/src/Services/Bedrock/Properties/AssemblyInfo.cs b/sdk/src/Services/Bedrock/Properties/AssemblyInfo.cs
index 5d1b8dd6ec18..7d0680510b15 100644
--- a/sdk/src/Services/Bedrock/Properties/AssemblyInfo.cs
+++ b/sdk/src/Services/Bedrock/Properties/AssemblyInfo.cs
@@ -41,5 +41,9 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.302.4")]
\ No newline at end of file
+#if BCL
+[assembly: AssemblyVersion("4.0")]
+#else
+[assembly: AssemblyVersion("4.0.0.0")]
+#endif
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/src/Services/BedrockAgent/AWSSDK.BedrockAgent.NetFramework.csproj b/sdk/src/Services/BedrockAgent/AWSSDK.BedrockAgent.NetFramework.csproj
index 2f05448f1c1f..748f33321641 100644
--- a/sdk/src/Services/BedrockAgent/AWSSDK.BedrockAgent.NetFramework.csproj
+++ b/sdk/src/Services/BedrockAgent/AWSSDK.BedrockAgent.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);BCL;AWS_ASYNC_API;CODE_ANALYSIS</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(RuleSetFileForBuild)' == 'false' Or '$(RuleSetFileForBuild)' == '' ">
diff --git a/sdk/src/Services/BedrockAgent/AWSSDK.BedrockAgent.NetStandard.csproj b/sdk/src/Services/BedrockAgent/AWSSDK.BedrockAgent.NetStandard.csproj
index 955e59a76122..16ce315c267c 100644
--- a/sdk/src/Services/BedrockAgent/AWSSDK.BedrockAgent.NetStandard.csproj
+++ b/sdk/src/Services/BedrockAgent/AWSSDK.BedrockAgent.NetStandard.csproj
@@ -22,6 +22,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <!-- Async Enumerable Compatibility -->
diff --git a/sdk/src/Services/BedrockAgent/Generated/AmazonBedrockAgentConfig.cs b/sdk/src/Services/BedrockAgent/Generated/AmazonBedrockAgentConfig.cs
index 44f3755f4387..42d9f3149ae9 100644
--- a/sdk/src/Services/BedrockAgent/Generated/AmazonBedrockAgentConfig.cs
+++ b/sdk/src/Services/BedrockAgent/Generated/AmazonBedrockAgentConfig.cs
@@ -34,7 +34,7 @@ namespace Amazon.BedrockAgent
     public partial class AmazonBedrockAgentConfig : ClientConfig
     {
         private static readonly string UserAgentString =
-            InternalSDKUtils.BuildUserAgentString("Bedrock Agent", "3.7.306.4");
+            InternalSDKUtils.BuildUserAgentString("Bedrock Agent", "4.0.0.0");
 
         private static readonly AmazonBedrockAgentEndpointResolver EndpointResolver =
             new AmazonBedrockAgentEndpointResolver();
diff --git a/sdk/src/Services/BedrockAgent/Properties/AssemblyInfo.cs b/sdk/src/Services/BedrockAgent/Properties/AssemblyInfo.cs
index 7f05f27eda92..eded622283c7 100644
--- a/sdk/src/Services/BedrockAgent/Properties/AssemblyInfo.cs
+++ b/sdk/src/Services/BedrockAgent/Properties/AssemblyInfo.cs
@@ -41,5 +41,9 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.306.4")]
\ No newline at end of file
+#if BCL
+[assembly: AssemblyVersion("4.0")]
+#else
+[assembly: AssemblyVersion("4.0.0.0")]
+#endif
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/src/Services/BedrockAgentRuntime/AWSSDK.BedrockAgentRuntime.NetFramework.csproj b/sdk/src/Services/BedrockAgentRuntime/AWSSDK.BedrockAgentRuntime.NetFramework.csproj
index 8422ab14deca..7eb5603d1403 100644
--- a/sdk/src/Services/BedrockAgentRuntime/AWSSDK.BedrockAgentRuntime.NetFramework.csproj
+++ b/sdk/src/Services/BedrockAgentRuntime/AWSSDK.BedrockAgentRuntime.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);BCL;AWS_ASYNC_API;CODE_ANALYSIS</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(RuleSetFileForBuild)' == 'false' Or '$(RuleSetFileForBuild)' == '' ">
diff --git a/sdk/src/Services/BedrockAgentRuntime/AWSSDK.BedrockAgentRuntime.NetStandard.csproj b/sdk/src/Services/BedrockAgentRuntime/AWSSDK.BedrockAgentRuntime.NetStandard.csproj
index cde720166813..e975353d1c82 100644
--- a/sdk/src/Services/BedrockAgentRuntime/AWSSDK.BedrockAgentRuntime.NetStandard.csproj
+++ b/sdk/src/Services/BedrockAgentRuntime/AWSSDK.BedrockAgentRuntime.NetStandard.csproj
@@ -22,6 +22,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <!-- Async Enumerable Compatibility -->
diff --git a/sdk/src/Services/BedrockAgentRuntime/Generated/AmazonBedrockAgentRuntimeConfig.cs b/sdk/src/Services/BedrockAgentRuntime/Generated/AmazonBedrockAgentRuntimeConfig.cs
index 6cdd5a1aba66..752bb757e03c 100644
--- a/sdk/src/Services/BedrockAgentRuntime/Generated/AmazonBedrockAgentRuntimeConfig.cs
+++ b/sdk/src/Services/BedrockAgentRuntime/Generated/AmazonBedrockAgentRuntimeConfig.cs
@@ -34,7 +34,7 @@ namespace Amazon.BedrockAgentRuntime
     public partial class AmazonBedrockAgentRuntimeConfig : ClientConfig
     {
         private static readonly string UserAgentString =
-            InternalSDKUtils.BuildUserAgentString("Bedrock Agent Runtime", "3.7.305.4");
+            InternalSDKUtils.BuildUserAgentString("Bedrock Agent Runtime", "4.0.0.0");
 
         private static readonly AmazonBedrockAgentRuntimeEndpointResolver EndpointResolver =
             new AmazonBedrockAgentRuntimeEndpointResolver();
diff --git a/sdk/src/Services/BedrockAgentRuntime/Properties/AssemblyInfo.cs b/sdk/src/Services/BedrockAgentRuntime/Properties/AssemblyInfo.cs
index 88bd0cac62bd..cf4ec86b5bd9 100644
--- a/sdk/src/Services/BedrockAgentRuntime/Properties/AssemblyInfo.cs
+++ b/sdk/src/Services/BedrockAgentRuntime/Properties/AssemblyInfo.cs
@@ -41,5 +41,9 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.305.4")]
\ No newline at end of file
+#if BCL
+[assembly: AssemblyVersion("4.0")]
+#else
+[assembly: AssemblyVersion("4.0.0.0")]
+#endif
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/src/Services/BedrockRuntime/AWSSDK.BedrockRuntime.NetFramework.csproj b/sdk/src/Services/BedrockRuntime/AWSSDK.BedrockRuntime.NetFramework.csproj
index 1f1757f727c9..f8b4fbf81688 100644
--- a/sdk/src/Services/BedrockRuntime/AWSSDK.BedrockRuntime.NetFramework.csproj
+++ b/sdk/src/Services/BedrockRuntime/AWSSDK.BedrockRuntime.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);BCL;AWS_ASYNC_API;CODE_ANALYSIS</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(RuleSetFileForBuild)' == 'false' Or '$(RuleSetFileForBuild)' == '' ">
diff --git a/sdk/src/Services/BedrockRuntime/AWSSDK.BedrockRuntime.NetStandard.csproj b/sdk/src/Services/BedrockRuntime/AWSSDK.BedrockRuntime.NetStandard.csproj
index af9e88fb1a27..931edaf186be 100644
--- a/sdk/src/Services/BedrockRuntime/AWSSDK.BedrockRuntime.NetStandard.csproj
+++ b/sdk/src/Services/BedrockRuntime/AWSSDK.BedrockRuntime.NetStandard.csproj
@@ -22,6 +22,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <!-- Async Enumerable Compatibility -->
diff --git a/sdk/src/Services/BedrockRuntime/Generated/AmazonBedrockRuntimeConfig.cs b/sdk/src/Services/BedrockRuntime/Generated/AmazonBedrockRuntimeConfig.cs
index bedcec45f1f8..283e94700810 100644
--- a/sdk/src/Services/BedrockRuntime/Generated/AmazonBedrockRuntimeConfig.cs
+++ b/sdk/src/Services/BedrockRuntime/Generated/AmazonBedrockRuntimeConfig.cs
@@ -34,7 +34,7 @@ namespace Amazon.BedrockRuntime
     public partial class AmazonBedrockRuntimeConfig : ClientConfig
     {
         private static readonly string UserAgentString =
-            InternalSDKUtils.BuildUserAgentString("Bedrock Runtime", "3.7.302.4");
+            InternalSDKUtils.BuildUserAgentString("Bedrock Runtime", "4.0.0.0");
 
         private static readonly AmazonBedrockRuntimeEndpointResolver EndpointResolver =
             new AmazonBedrockRuntimeEndpointResolver();
diff --git a/sdk/src/Services/BedrockRuntime/Properties/AssemblyInfo.cs b/sdk/src/Services/BedrockRuntime/Properties/AssemblyInfo.cs
index e4eca89d8357..299e43a05241 100644
--- a/sdk/src/Services/BedrockRuntime/Properties/AssemblyInfo.cs
+++ b/sdk/src/Services/BedrockRuntime/Properties/AssemblyInfo.cs
@@ -41,5 +41,9 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.302.4")]
\ No newline at end of file
+#if BCL
+[assembly: AssemblyVersion("4.0")]
+#else
+[assembly: AssemblyVersion("4.0.0.0")]
+#endif
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/src/Services/BillingConductor/AWSSDK.BillingConductor.NetFramework.csproj b/sdk/src/Services/BillingConductor/AWSSDK.BillingConductor.NetFramework.csproj
index 0f6c68207e7e..2252d8b0beaf 100644
--- a/sdk/src/Services/BillingConductor/AWSSDK.BillingConductor.NetFramework.csproj
+++ b/sdk/src/Services/BillingConductor/AWSSDK.BillingConductor.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);BCL;AWS_ASYNC_API;CODE_ANALYSIS</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(RuleSetFileForBuild)' == 'false' Or '$(RuleSetFileForBuild)' == '' ">
diff --git a/sdk/src/Services/BillingConductor/AWSSDK.BillingConductor.NetStandard.csproj b/sdk/src/Services/BillingConductor/AWSSDK.BillingConductor.NetStandard.csproj
index 583ad2b97d26..955293b67e10 100644
--- a/sdk/src/Services/BillingConductor/AWSSDK.BillingConductor.NetStandard.csproj
+++ b/sdk/src/Services/BillingConductor/AWSSDK.BillingConductor.NetStandard.csproj
@@ -22,6 +22,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <!-- Async Enumerable Compatibility -->
diff --git a/sdk/src/Services/BillingConductor/Generated/AmazonBillingConductorConfig.cs b/sdk/src/Services/BillingConductor/Generated/AmazonBillingConductorConfig.cs
index 4ca5025dfccf..b2f91a153375 100644
--- a/sdk/src/Services/BillingConductor/Generated/AmazonBillingConductorConfig.cs
+++ b/sdk/src/Services/BillingConductor/Generated/AmazonBillingConductorConfig.cs
@@ -34,7 +34,7 @@ namespace Amazon.BillingConductor
     public partial class AmazonBillingConductorConfig : ClientConfig
     {
         private static readonly string UserAgentString =
-            InternalSDKUtils.BuildUserAgentString("billingconductor", "3.7.302.65");
+            InternalSDKUtils.BuildUserAgentString("billingconductor", "4.0.0.0");
 
         private static readonly AmazonBillingConductorEndpointResolver EndpointResolver =
             new AmazonBillingConductorEndpointResolver();
diff --git a/sdk/src/Services/BillingConductor/Properties/AssemblyInfo.cs b/sdk/src/Services/BillingConductor/Properties/AssemblyInfo.cs
index 6cc586d4b719..961aee622155 100644
--- a/sdk/src/Services/BillingConductor/Properties/AssemblyInfo.cs
+++ b/sdk/src/Services/BillingConductor/Properties/AssemblyInfo.cs
@@ -41,5 +41,9 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.302.65")]
\ No newline at end of file
+#if BCL
+[assembly: AssemblyVersion("4.0")]
+#else
+[assembly: AssemblyVersion("4.0.0.0")]
+#endif
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/src/Services/Braket/AWSSDK.Braket.NetFramework.csproj b/sdk/src/Services/Braket/AWSSDK.Braket.NetFramework.csproj
index effc42f0d520..5245a21c66b1 100644
--- a/sdk/src/Services/Braket/AWSSDK.Braket.NetFramework.csproj
+++ b/sdk/src/Services/Braket/AWSSDK.Braket.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);BCL;AWS_ASYNC_API;CODE_ANALYSIS</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(RuleSetFileForBuild)' == 'false' Or '$(RuleSetFileForBuild)' == '' ">
diff --git a/sdk/src/Services/Braket/AWSSDK.Braket.NetStandard.csproj b/sdk/src/Services/Braket/AWSSDK.Braket.NetStandard.csproj
index 35279424f2be..8b94bd58cc9a 100644
--- a/sdk/src/Services/Braket/AWSSDK.Braket.NetStandard.csproj
+++ b/sdk/src/Services/Braket/AWSSDK.Braket.NetStandard.csproj
@@ -22,6 +22,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <!-- Async Enumerable Compatibility -->
diff --git a/sdk/src/Services/Braket/Generated/AmazonBraketConfig.cs b/sdk/src/Services/Braket/Generated/AmazonBraketConfig.cs
index cfbf07b043fa..d56a0e042ebc 100644
--- a/sdk/src/Services/Braket/Generated/AmazonBraketConfig.cs
+++ b/sdk/src/Services/Braket/Generated/AmazonBraketConfig.cs
@@ -34,7 +34,7 @@ namespace Amazon.Braket
     public partial class AmazonBraketConfig : ClientConfig
     {
         private static readonly string UserAgentString =
-            InternalSDKUtils.BuildUserAgentString("Braket", "3.7.302.36");
+            InternalSDKUtils.BuildUserAgentString("Braket", "4.0.0.0");
 
         private static readonly AmazonBraketEndpointResolver EndpointResolver =
             new AmazonBraketEndpointResolver();
diff --git a/sdk/src/Services/Braket/Properties/AssemblyInfo.cs b/sdk/src/Services/Braket/Properties/AssemblyInfo.cs
index b62ecbbc13f6..326a3896981d 100644
--- a/sdk/src/Services/Braket/Properties/AssemblyInfo.cs
+++ b/sdk/src/Services/Braket/Properties/AssemblyInfo.cs
@@ -41,5 +41,9 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.302.36")]
\ No newline at end of file
+#if BCL
+[assembly: AssemblyVersion("4.0")]
+#else
+[assembly: AssemblyVersion("4.0.0.0")]
+#endif
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/src/Services/Budgets/AWSSDK.Budgets.NetFramework.csproj b/sdk/src/Services/Budgets/AWSSDK.Budgets.NetFramework.csproj
index 02646bf4da13..cb6e6e818313 100644
--- a/sdk/src/Services/Budgets/AWSSDK.Budgets.NetFramework.csproj
+++ b/sdk/src/Services/Budgets/AWSSDK.Budgets.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);BCL;AWS_ASYNC_API;CODE_ANALYSIS</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(RuleSetFileForBuild)' == 'false' Or '$(RuleSetFileForBuild)' == '' ">
diff --git a/sdk/src/Services/Budgets/AWSSDK.Budgets.NetStandard.csproj b/sdk/src/Services/Budgets/AWSSDK.Budgets.NetStandard.csproj
index a0c11b3e9c94..affb8a549f9a 100644
--- a/sdk/src/Services/Budgets/AWSSDK.Budgets.NetStandard.csproj
+++ b/sdk/src/Services/Budgets/AWSSDK.Budgets.NetStandard.csproj
@@ -22,6 +22,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <!-- Async Enumerable Compatibility -->
diff --git a/sdk/src/Services/Budgets/Generated/AmazonBudgetsConfig.cs b/sdk/src/Services/Budgets/Generated/AmazonBudgetsConfig.cs
index bb6bcb629e54..05fc507d7137 100644
--- a/sdk/src/Services/Budgets/Generated/AmazonBudgetsConfig.cs
+++ b/sdk/src/Services/Budgets/Generated/AmazonBudgetsConfig.cs
@@ -34,7 +34,7 @@ namespace Amazon.Budgets
     public partial class AmazonBudgetsConfig : ClientConfig
     {
         private static readonly string UserAgentString =
-            InternalSDKUtils.BuildUserAgentString("Budgets", "3.7.300.84");
+            InternalSDKUtils.BuildUserAgentString("Budgets", "4.0.0.0");
 
         private static readonly AmazonBudgetsEndpointResolver EndpointResolver =
             new AmazonBudgetsEndpointResolver();
diff --git a/sdk/src/Services/Budgets/Properties/AssemblyInfo.cs b/sdk/src/Services/Budgets/Properties/AssemblyInfo.cs
index 7d7c66862a78..f1297dc8814b 100644
--- a/sdk/src/Services/Budgets/Properties/AssemblyInfo.cs
+++ b/sdk/src/Services/Budgets/Properties/AssemblyInfo.cs
@@ -41,5 +41,9 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.300.84")]
\ No newline at end of file
+#if BCL
+[assembly: AssemblyVersion("4.0")]
+#else
+[assembly: AssemblyVersion("4.0.0.0")]
+#endif
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/src/Services/CertificateManager/AWSSDK.CertificateManager.NetFramework.csproj b/sdk/src/Services/CertificateManager/AWSSDK.CertificateManager.NetFramework.csproj
index 88c8b84a1eef..86c2f364ae9c 100644
--- a/sdk/src/Services/CertificateManager/AWSSDK.CertificateManager.NetFramework.csproj
+++ b/sdk/src/Services/CertificateManager/AWSSDK.CertificateManager.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);BCL;AWS_ASYNC_API;CODE_ANALYSIS</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(RuleSetFileForBuild)' == 'false' Or '$(RuleSetFileForBuild)' == '' ">
diff --git a/sdk/src/Services/CertificateManager/AWSSDK.CertificateManager.NetStandard.csproj b/sdk/src/Services/CertificateManager/AWSSDK.CertificateManager.NetStandard.csproj
index f2798b29aca6..cf021061e4c4 100644
--- a/sdk/src/Services/CertificateManager/AWSSDK.CertificateManager.NetStandard.csproj
+++ b/sdk/src/Services/CertificateManager/AWSSDK.CertificateManager.NetStandard.csproj
@@ -22,6 +22,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <!-- Async Enumerable Compatibility -->
diff --git a/sdk/src/Services/CertificateManager/Generated/AmazonCertificateManagerConfig.cs b/sdk/src/Services/CertificateManager/Generated/AmazonCertificateManagerConfig.cs
index a40ac1f03b5d..e2e340a3a805 100644
--- a/sdk/src/Services/CertificateManager/Generated/AmazonCertificateManagerConfig.cs
+++ b/sdk/src/Services/CertificateManager/Generated/AmazonCertificateManagerConfig.cs
@@ -34,7 +34,7 @@ namespace Amazon.CertificateManager
     public partial class AmazonCertificateManagerConfig : ClientConfig
     {
         private static readonly string UserAgentString =
-            InternalSDKUtils.BuildUserAgentString("ACM", "3.7.300.84");
+            InternalSDKUtils.BuildUserAgentString("ACM", "4.0.0.0");
 
         private static readonly AmazonCertificateManagerEndpointResolver EndpointResolver =
             new AmazonCertificateManagerEndpointResolver();
diff --git a/sdk/src/Services/CertificateManager/Properties/AssemblyInfo.cs b/sdk/src/Services/CertificateManager/Properties/AssemblyInfo.cs
index b954e5091bf7..02126a131b2d 100644
--- a/sdk/src/Services/CertificateManager/Properties/AssemblyInfo.cs
+++ b/sdk/src/Services/CertificateManager/Properties/AssemblyInfo.cs
@@ -41,5 +41,9 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.300.84")]
\ No newline at end of file
+#if BCL
+[assembly: AssemblyVersion("4.0")]
+#else
+[assembly: AssemblyVersion("4.0.0.0")]
+#endif
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/src/Services/Chatbot/AWSSDK.Chatbot.NetFramework.csproj b/sdk/src/Services/Chatbot/AWSSDK.Chatbot.NetFramework.csproj
index 1085371044c5..314c4cc58cee 100644
--- a/sdk/src/Services/Chatbot/AWSSDK.Chatbot.NetFramework.csproj
+++ b/sdk/src/Services/Chatbot/AWSSDK.Chatbot.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);BCL;AWS_ASYNC_API;CODE_ANALYSIS</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(RuleSetFileForBuild)' == 'false' Or '$(RuleSetFileForBuild)' == '' ">
diff --git a/sdk/src/Services/Chatbot/AWSSDK.Chatbot.NetStandard.csproj b/sdk/src/Services/Chatbot/AWSSDK.Chatbot.NetStandard.csproj
index 726acdd2f6ae..5fedc8f798cc 100644
--- a/sdk/src/Services/Chatbot/AWSSDK.Chatbot.NetStandard.csproj
+++ b/sdk/src/Services/Chatbot/AWSSDK.Chatbot.NetStandard.csproj
@@ -22,6 +22,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <!-- Async Enumerable Compatibility -->
diff --git a/sdk/src/Services/Chatbot/Generated/AmazonChatbotConfig.cs b/sdk/src/Services/Chatbot/Generated/AmazonChatbotConfig.cs
index 83e7cf1b5e6c..a23cdc812bd7 100644
--- a/sdk/src/Services/Chatbot/Generated/AmazonChatbotConfig.cs
+++ b/sdk/src/Services/Chatbot/Generated/AmazonChatbotConfig.cs
@@ -34,7 +34,7 @@ namespace Amazon.Chatbot
     public partial class AmazonChatbotConfig : ClientConfig
     {
         private static readonly string UserAgentString =
-            InternalSDKUtils.BuildUserAgentString("chatbot", "3.7.300.33");
+            InternalSDKUtils.BuildUserAgentString("chatbot", "4.0.0.0");
 
         private static readonly AmazonChatbotEndpointResolver EndpointResolver =
             new AmazonChatbotEndpointResolver();
diff --git a/sdk/src/Services/Chatbot/Properties/AssemblyInfo.cs b/sdk/src/Services/Chatbot/Properties/AssemblyInfo.cs
index af53ab65a4b7..07bc58886007 100644
--- a/sdk/src/Services/Chatbot/Properties/AssemblyInfo.cs
+++ b/sdk/src/Services/Chatbot/Properties/AssemblyInfo.cs
@@ -41,5 +41,9 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.300.33")]
\ No newline at end of file
+#if BCL
+[assembly: AssemblyVersion("4.0")]
+#else
+[assembly: AssemblyVersion("4.0.0.0")]
+#endif
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/src/Services/Chime/AWSSDK.Chime.NetFramework.csproj b/sdk/src/Services/Chime/AWSSDK.Chime.NetFramework.csproj
index 292d0a9ea1e5..c2c1c0cc95be 100644
--- a/sdk/src/Services/Chime/AWSSDK.Chime.NetFramework.csproj
+++ b/sdk/src/Services/Chime/AWSSDK.Chime.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);BCL;AWS_ASYNC_API;CODE_ANALYSIS</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(RuleSetFileForBuild)' == 'false' Or '$(RuleSetFileForBuild)' == '' ">
diff --git a/sdk/src/Services/Chime/AWSSDK.Chime.NetStandard.csproj b/sdk/src/Services/Chime/AWSSDK.Chime.NetStandard.csproj
index 0eccf324307e..a5730cc557be 100644
--- a/sdk/src/Services/Chime/AWSSDK.Chime.NetStandard.csproj
+++ b/sdk/src/Services/Chime/AWSSDK.Chime.NetStandard.csproj
@@ -22,6 +22,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <!-- Async Enumerable Compatibility -->
diff --git a/sdk/src/Services/Chime/Generated/AmazonChimeConfig.cs b/sdk/src/Services/Chime/Generated/AmazonChimeConfig.cs
index 6d8e0ace4772..4361930d8c21 100644
--- a/sdk/src/Services/Chime/Generated/AmazonChimeConfig.cs
+++ b/sdk/src/Services/Chime/Generated/AmazonChimeConfig.cs
@@ -34,7 +34,7 @@ namespace Amazon.Chime
     public partial class AmazonChimeConfig : ClientConfig
     {
         private static readonly string UserAgentString =
-            InternalSDKUtils.BuildUserAgentString("Chime", "3.7.300.84");
+            InternalSDKUtils.BuildUserAgentString("Chime", "4.0.0.0");
 
         private static readonly AmazonChimeEndpointResolver EndpointResolver =
             new AmazonChimeEndpointResolver();
diff --git a/sdk/src/Services/Chime/Properties/AssemblyInfo.cs b/sdk/src/Services/Chime/Properties/AssemblyInfo.cs
index a3557c32b685..08534561a9aa 100644
--- a/sdk/src/Services/Chime/Properties/AssemblyInfo.cs
+++ b/sdk/src/Services/Chime/Properties/AssemblyInfo.cs
@@ -41,5 +41,9 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.300.84")]
\ No newline at end of file
+#if BCL
+[assembly: AssemblyVersion("4.0")]
+#else
+[assembly: AssemblyVersion("4.0.0.0")]
+#endif
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/src/Services/ChimeSDKIdentity/AWSSDK.ChimeSDKIdentity.NetFramework.csproj b/sdk/src/Services/ChimeSDKIdentity/AWSSDK.ChimeSDKIdentity.NetFramework.csproj
index feb3df55763e..1ebe90cf58f5 100644
--- a/sdk/src/Services/ChimeSDKIdentity/AWSSDK.ChimeSDKIdentity.NetFramework.csproj
+++ b/sdk/src/Services/ChimeSDKIdentity/AWSSDK.ChimeSDKIdentity.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);BCL;AWS_ASYNC_API;CODE_ANALYSIS</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(RuleSetFileForBuild)' == 'false' Or '$(RuleSetFileForBuild)' == '' ">
diff --git a/sdk/src/Services/ChimeSDKIdentity/AWSSDK.ChimeSDKIdentity.NetStandard.csproj b/sdk/src/Services/ChimeSDKIdentity/AWSSDK.ChimeSDKIdentity.NetStandard.csproj
index ced5cefc0bbd..e30c9b3c1c07 100644
--- a/sdk/src/Services/ChimeSDKIdentity/AWSSDK.ChimeSDKIdentity.NetStandard.csproj
+++ b/sdk/src/Services/ChimeSDKIdentity/AWSSDK.ChimeSDKIdentity.NetStandard.csproj
@@ -22,6 +22,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <!-- Async Enumerable Compatibility -->
diff --git a/sdk/src/Services/ChimeSDKIdentity/Generated/AmazonChimeSDKIdentityConfig.cs b/sdk/src/Services/ChimeSDKIdentity/Generated/AmazonChimeSDKIdentityConfig.cs
index bdd7caa5f25a..b412635b7390 100644
--- a/sdk/src/Services/ChimeSDKIdentity/Generated/AmazonChimeSDKIdentityConfig.cs
+++ b/sdk/src/Services/ChimeSDKIdentity/Generated/AmazonChimeSDKIdentityConfig.cs
@@ -34,7 +34,7 @@ namespace Amazon.ChimeSDKIdentity
     public partial class AmazonChimeSDKIdentityConfig : ClientConfig
     {
         private static readonly string UserAgentString =
-            InternalSDKUtils.BuildUserAgentString("Chime SDK Identity", "3.7.300.84");
+            InternalSDKUtils.BuildUserAgentString("Chime SDK Identity", "4.0.0.0");
 
         private static readonly AmazonChimeSDKIdentityEndpointResolver EndpointResolver =
             new AmazonChimeSDKIdentityEndpointResolver();
diff --git a/sdk/src/Services/ChimeSDKIdentity/Properties/AssemblyInfo.cs b/sdk/src/Services/ChimeSDKIdentity/Properties/AssemblyInfo.cs
index d35b5edd0855..7442643c6169 100644
--- a/sdk/src/Services/ChimeSDKIdentity/Properties/AssemblyInfo.cs
+++ b/sdk/src/Services/ChimeSDKIdentity/Properties/AssemblyInfo.cs
@@ -41,5 +41,9 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.300.84")]
\ No newline at end of file
+#if BCL
+[assembly: AssemblyVersion("4.0")]
+#else
+[assembly: AssemblyVersion("4.0.0.0")]
+#endif
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/src/Services/ChimeSDKMediaPipelines/AWSSDK.ChimeSDKMediaPipelines.NetFramework.csproj b/sdk/src/Services/ChimeSDKMediaPipelines/AWSSDK.ChimeSDKMediaPipelines.NetFramework.csproj
index 891e2f21c81d..277da76fd687 100644
--- a/sdk/src/Services/ChimeSDKMediaPipelines/AWSSDK.ChimeSDKMediaPipelines.NetFramework.csproj
+++ b/sdk/src/Services/ChimeSDKMediaPipelines/AWSSDK.ChimeSDKMediaPipelines.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);BCL;AWS_ASYNC_API;CODE_ANALYSIS</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(RuleSetFileForBuild)' == 'false' Or '$(RuleSetFileForBuild)' == '' ">
diff --git a/sdk/src/Services/ChimeSDKMediaPipelines/AWSSDK.ChimeSDKMediaPipelines.NetStandard.csproj b/sdk/src/Services/ChimeSDKMediaPipelines/AWSSDK.ChimeSDKMediaPipelines.NetStandard.csproj
index 8223c94aeb1e..41400bcc0e0e 100644
--- a/sdk/src/Services/ChimeSDKMediaPipelines/AWSSDK.ChimeSDKMediaPipelines.NetStandard.csproj
+++ b/sdk/src/Services/ChimeSDKMediaPipelines/AWSSDK.ChimeSDKMediaPipelines.NetStandard.csproj
@@ -22,6 +22,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <!-- Async Enumerable Compatibility -->
diff --git a/sdk/src/Services/ChimeSDKMediaPipelines/Generated/AmazonChimeSDKMediaPipelinesConfig.cs b/sdk/src/Services/ChimeSDKMediaPipelines/Generated/AmazonChimeSDKMediaPipelinesConfig.cs
index cdf24ad620d0..8d48d36e411e 100644
--- a/sdk/src/Services/ChimeSDKMediaPipelines/Generated/AmazonChimeSDKMediaPipelinesConfig.cs
+++ b/sdk/src/Services/ChimeSDKMediaPipelines/Generated/AmazonChimeSDKMediaPipelinesConfig.cs
@@ -34,7 +34,7 @@ namespace Amazon.ChimeSDKMediaPipelines
     public partial class AmazonChimeSDKMediaPipelinesConfig : ClientConfig
     {
         private static readonly string UserAgentString =
-            InternalSDKUtils.BuildUserAgentString("Chime SDK Media Pipelines", "3.7.300.84");
+            InternalSDKUtils.BuildUserAgentString("Chime SDK Media Pipelines", "4.0.0.0");
 
         private static readonly AmazonChimeSDKMediaPipelinesEndpointResolver EndpointResolver =
             new AmazonChimeSDKMediaPipelinesEndpointResolver();
diff --git a/sdk/src/Services/ChimeSDKMediaPipelines/Properties/AssemblyInfo.cs b/sdk/src/Services/ChimeSDKMediaPipelines/Properties/AssemblyInfo.cs
index 70886162e7bd..30c5905b32b7 100644
--- a/sdk/src/Services/ChimeSDKMediaPipelines/Properties/AssemblyInfo.cs
+++ b/sdk/src/Services/ChimeSDKMediaPipelines/Properties/AssemblyInfo.cs
@@ -41,5 +41,9 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.300.84")]
\ No newline at end of file
+#if BCL
+[assembly: AssemblyVersion("4.0")]
+#else
+[assembly: AssemblyVersion("4.0.0.0")]
+#endif
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/src/Services/ChimeSDKMeetings/AWSSDK.ChimeSDKMeetings.NetFramework.csproj b/sdk/src/Services/ChimeSDKMeetings/AWSSDK.ChimeSDKMeetings.NetFramework.csproj
index 21dfe3876fbc..fa18d128b207 100644
--- a/sdk/src/Services/ChimeSDKMeetings/AWSSDK.ChimeSDKMeetings.NetFramework.csproj
+++ b/sdk/src/Services/ChimeSDKMeetings/AWSSDK.ChimeSDKMeetings.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);BCL;AWS_ASYNC_API;CODE_ANALYSIS</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(RuleSetFileForBuild)' == 'false' Or '$(RuleSetFileForBuild)' == '' ">
diff --git a/sdk/src/Services/ChimeSDKMeetings/AWSSDK.ChimeSDKMeetings.NetStandard.csproj b/sdk/src/Services/ChimeSDKMeetings/AWSSDK.ChimeSDKMeetings.NetStandard.csproj
index 1c8042346ee2..ec665cd2b8a1 100644
--- a/sdk/src/Services/ChimeSDKMeetings/AWSSDK.ChimeSDKMeetings.NetStandard.csproj
+++ b/sdk/src/Services/ChimeSDKMeetings/AWSSDK.ChimeSDKMeetings.NetStandard.csproj
@@ -22,6 +22,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <!-- Async Enumerable Compatibility -->
diff --git a/sdk/src/Services/ChimeSDKMeetings/Generated/AmazonChimeSDKMeetingsConfig.cs b/sdk/src/Services/ChimeSDKMeetings/Generated/AmazonChimeSDKMeetingsConfig.cs
index 0fb7a3d0da9e..e37af625533d 100644
--- a/sdk/src/Services/ChimeSDKMeetings/Generated/AmazonChimeSDKMeetingsConfig.cs
+++ b/sdk/src/Services/ChimeSDKMeetings/Generated/AmazonChimeSDKMeetingsConfig.cs
@@ -34,7 +34,7 @@ namespace Amazon.ChimeSDKMeetings
     public partial class AmazonChimeSDKMeetingsConfig : ClientConfig
     {
         private static readonly string UserAgentString =
-            InternalSDKUtils.BuildUserAgentString("Chime SDK Meetings", "3.7.301.62");
+            InternalSDKUtils.BuildUserAgentString("Chime SDK Meetings", "4.0.0.0");
 
         private static readonly AmazonChimeSDKMeetingsEndpointResolver EndpointResolver =
             new AmazonChimeSDKMeetingsEndpointResolver();
diff --git a/sdk/src/Services/ChimeSDKMeetings/Properties/AssemblyInfo.cs b/sdk/src/Services/ChimeSDKMeetings/Properties/AssemblyInfo.cs
index f9474d353f07..75845a0dfdc3 100644
--- a/sdk/src/Services/ChimeSDKMeetings/Properties/AssemblyInfo.cs
+++ b/sdk/src/Services/ChimeSDKMeetings/Properties/AssemblyInfo.cs
@@ -41,5 +41,9 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.301.62")]
\ No newline at end of file
+#if BCL
+[assembly: AssemblyVersion("4.0")]
+#else
+[assembly: AssemblyVersion("4.0.0.0")]
+#endif
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/src/Services/ChimeSDKMessaging/AWSSDK.ChimeSDKMessaging.NetFramework.csproj b/sdk/src/Services/ChimeSDKMessaging/AWSSDK.ChimeSDKMessaging.NetFramework.csproj
index cb479c37a55a..d90ef9c31df9 100644
--- a/sdk/src/Services/ChimeSDKMessaging/AWSSDK.ChimeSDKMessaging.NetFramework.csproj
+++ b/sdk/src/Services/ChimeSDKMessaging/AWSSDK.ChimeSDKMessaging.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);BCL;AWS_ASYNC_API;CODE_ANALYSIS</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(RuleSetFileForBuild)' == 'false' Or '$(RuleSetFileForBuild)' == '' ">
diff --git a/sdk/src/Services/ChimeSDKMessaging/AWSSDK.ChimeSDKMessaging.NetStandard.csproj b/sdk/src/Services/ChimeSDKMessaging/AWSSDK.ChimeSDKMessaging.NetStandard.csproj
index 069d343aeade..a45d0475613b 100644
--- a/sdk/src/Services/ChimeSDKMessaging/AWSSDK.ChimeSDKMessaging.NetStandard.csproj
+++ b/sdk/src/Services/ChimeSDKMessaging/AWSSDK.ChimeSDKMessaging.NetStandard.csproj
@@ -22,6 +22,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <!-- Async Enumerable Compatibility -->
diff --git a/sdk/src/Services/ChimeSDKMessaging/Generated/AmazonChimeSDKMessagingConfig.cs b/sdk/src/Services/ChimeSDKMessaging/Generated/AmazonChimeSDKMessagingConfig.cs
index ee0b6eab9d20..a61600d51a0f 100644
--- a/sdk/src/Services/ChimeSDKMessaging/Generated/AmazonChimeSDKMessagingConfig.cs
+++ b/sdk/src/Services/ChimeSDKMessaging/Generated/AmazonChimeSDKMessagingConfig.cs
@@ -34,7 +34,7 @@ namespace Amazon.ChimeSDKMessaging
     public partial class AmazonChimeSDKMessagingConfig : ClientConfig
     {
         private static readonly string UserAgentString =
-            InternalSDKUtils.BuildUserAgentString("Chime SDK Messaging", "3.7.300.84");
+            InternalSDKUtils.BuildUserAgentString("Chime SDK Messaging", "4.0.0.0");
 
         private static readonly AmazonChimeSDKMessagingEndpointResolver EndpointResolver =
             new AmazonChimeSDKMessagingEndpointResolver();
diff --git a/sdk/src/Services/ChimeSDKMessaging/Properties/AssemblyInfo.cs b/sdk/src/Services/ChimeSDKMessaging/Properties/AssemblyInfo.cs
index 28c20a767dca..5402a9b66ed7 100644
--- a/sdk/src/Services/ChimeSDKMessaging/Properties/AssemblyInfo.cs
+++ b/sdk/src/Services/ChimeSDKMessaging/Properties/AssemblyInfo.cs
@@ -41,5 +41,9 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.300.84")]
\ No newline at end of file
+#if BCL
+[assembly: AssemblyVersion("4.0")]
+#else
+[assembly: AssemblyVersion("4.0.0.0")]
+#endif
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/src/Services/ChimeSDKVoice/AWSSDK.ChimeSDKVoice.NetFramework.csproj b/sdk/src/Services/ChimeSDKVoice/AWSSDK.ChimeSDKVoice.NetFramework.csproj
index 4b1837068dd3..88bc7c920dfa 100644
--- a/sdk/src/Services/ChimeSDKVoice/AWSSDK.ChimeSDKVoice.NetFramework.csproj
+++ b/sdk/src/Services/ChimeSDKVoice/AWSSDK.ChimeSDKVoice.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);BCL;AWS_ASYNC_API;CODE_ANALYSIS</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(RuleSetFileForBuild)' == 'false' Or '$(RuleSetFileForBuild)' == '' ">
diff --git a/sdk/src/Services/ChimeSDKVoice/AWSSDK.ChimeSDKVoice.NetStandard.csproj b/sdk/src/Services/ChimeSDKVoice/AWSSDK.ChimeSDKVoice.NetStandard.csproj
index 526ee63beffa..53e50960e4d3 100644
--- a/sdk/src/Services/ChimeSDKVoice/AWSSDK.ChimeSDKVoice.NetStandard.csproj
+++ b/sdk/src/Services/ChimeSDKVoice/AWSSDK.ChimeSDKVoice.NetStandard.csproj
@@ -22,6 +22,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <!-- Async Enumerable Compatibility -->
diff --git a/sdk/src/Services/ChimeSDKVoice/Generated/AmazonChimeSDKVoiceConfig.cs b/sdk/src/Services/ChimeSDKVoice/Generated/AmazonChimeSDKVoiceConfig.cs
index d4da4803d325..a901c1c2946f 100644
--- a/sdk/src/Services/ChimeSDKVoice/Generated/AmazonChimeSDKVoiceConfig.cs
+++ b/sdk/src/Services/ChimeSDKVoice/Generated/AmazonChimeSDKVoiceConfig.cs
@@ -34,7 +34,7 @@ namespace Amazon.ChimeSDKVoice
     public partial class AmazonChimeSDKVoiceConfig : ClientConfig
     {
         private static readonly string UserAgentString =
-            InternalSDKUtils.BuildUserAgentString("Chime SDK Voice", "3.7.301.0");
+            InternalSDKUtils.BuildUserAgentString("Chime SDK Voice", "4.0.0.0");
 
         private static readonly AmazonChimeSDKVoiceEndpointResolver EndpointResolver =
             new AmazonChimeSDKVoiceEndpointResolver();
diff --git a/sdk/src/Services/ChimeSDKVoice/Properties/AssemblyInfo.cs b/sdk/src/Services/ChimeSDKVoice/Properties/AssemblyInfo.cs
index a38b24fa93eb..be6f0cdcfaf9 100644
--- a/sdk/src/Services/ChimeSDKVoice/Properties/AssemblyInfo.cs
+++ b/sdk/src/Services/ChimeSDKVoice/Properties/AssemblyInfo.cs
@@ -41,5 +41,9 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.301.0")]
\ No newline at end of file
+#if BCL
+[assembly: AssemblyVersion("4.0")]
+#else
+[assembly: AssemblyVersion("4.0.0.0")]
+#endif
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/src/Services/CleanRooms/AWSSDK.CleanRooms.NetFramework.csproj b/sdk/src/Services/CleanRooms/AWSSDK.CleanRooms.NetFramework.csproj
index 8e5cc447bf8a..07debf66543c 100644
--- a/sdk/src/Services/CleanRooms/AWSSDK.CleanRooms.NetFramework.csproj
+++ b/sdk/src/Services/CleanRooms/AWSSDK.CleanRooms.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);BCL;AWS_ASYNC_API;CODE_ANALYSIS</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(RuleSetFileForBuild)' == 'false' Or '$(RuleSetFileForBuild)' == '' ">
diff --git a/sdk/src/Services/CleanRooms/AWSSDK.CleanRooms.NetStandard.csproj b/sdk/src/Services/CleanRooms/AWSSDK.CleanRooms.NetStandard.csproj
index 383839f898ab..8c2ae86f1440 100644
--- a/sdk/src/Services/CleanRooms/AWSSDK.CleanRooms.NetStandard.csproj
+++ b/sdk/src/Services/CleanRooms/AWSSDK.CleanRooms.NetStandard.csproj
@@ -22,6 +22,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <!-- Async Enumerable Compatibility -->
diff --git a/sdk/src/Services/CleanRooms/Generated/AmazonCleanRoomsConfig.cs b/sdk/src/Services/CleanRooms/Generated/AmazonCleanRoomsConfig.cs
index aff4d9ceb191..70fc0bf88bec 100644
--- a/sdk/src/Services/CleanRooms/Generated/AmazonCleanRoomsConfig.cs
+++ b/sdk/src/Services/CleanRooms/Generated/AmazonCleanRoomsConfig.cs
@@ -34,7 +34,7 @@ namespace Amazon.CleanRooms
     public partial class AmazonCleanRoomsConfig : ClientConfig
     {
         private static readonly string UserAgentString =
-            InternalSDKUtils.BuildUserAgentString("CleanRooms", "3.7.304.11");
+            InternalSDKUtils.BuildUserAgentString("CleanRooms", "4.0.0.0");
 
         private static readonly AmazonCleanRoomsEndpointResolver EndpointResolver =
             new AmazonCleanRoomsEndpointResolver();
diff --git a/sdk/src/Services/CleanRooms/Properties/AssemblyInfo.cs b/sdk/src/Services/CleanRooms/Properties/AssemblyInfo.cs
index fcadbcc7c723..92e6aacb79ef 100644
--- a/sdk/src/Services/CleanRooms/Properties/AssemblyInfo.cs
+++ b/sdk/src/Services/CleanRooms/Properties/AssemblyInfo.cs
@@ -41,5 +41,9 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.304.11")]
\ No newline at end of file
+#if BCL
+[assembly: AssemblyVersion("4.0")]
+#else
+[assembly: AssemblyVersion("4.0.0.0")]
+#endif
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/src/Services/CleanRoomsML/AWSSDK.CleanRoomsML.NetFramework.csproj b/sdk/src/Services/CleanRoomsML/AWSSDK.CleanRoomsML.NetFramework.csproj
index c24ad45293dd..28f724304e72 100644
--- a/sdk/src/Services/CleanRoomsML/AWSSDK.CleanRoomsML.NetFramework.csproj
+++ b/sdk/src/Services/CleanRoomsML/AWSSDK.CleanRoomsML.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);BCL;AWS_ASYNC_API;CODE_ANALYSIS</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(RuleSetFileForBuild)' == 'false' Or '$(RuleSetFileForBuild)' == '' ">
diff --git a/sdk/src/Services/CleanRoomsML/AWSSDK.CleanRoomsML.NetStandard.csproj b/sdk/src/Services/CleanRoomsML/AWSSDK.CleanRoomsML.NetStandard.csproj
index 05d709d339a6..a7d5879a1f08 100644
--- a/sdk/src/Services/CleanRoomsML/AWSSDK.CleanRoomsML.NetStandard.csproj
+++ b/sdk/src/Services/CleanRoomsML/AWSSDK.CleanRoomsML.NetStandard.csproj
@@ -22,6 +22,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <!-- Async Enumerable Compatibility -->
diff --git a/sdk/src/Services/CleanRoomsML/Generated/AmazonCleanRoomsMLConfig.cs b/sdk/src/Services/CleanRoomsML/Generated/AmazonCleanRoomsMLConfig.cs
index 14cea080af2b..6e591180ba2e 100644
--- a/sdk/src/Services/CleanRoomsML/Generated/AmazonCleanRoomsMLConfig.cs
+++ b/sdk/src/Services/CleanRoomsML/Generated/AmazonCleanRoomsMLConfig.cs
@@ -34,7 +34,7 @@ namespace Amazon.CleanRoomsML
     public partial class AmazonCleanRoomsMLConfig : ClientConfig
     {
         private static readonly string UserAgentString =
-            InternalSDKUtils.BuildUserAgentString("CleanRoomsML", "3.7.302.16");
+            InternalSDKUtils.BuildUserAgentString("CleanRoomsML", "4.0.0.0");
 
         private static readonly AmazonCleanRoomsMLEndpointResolver EndpointResolver =
             new AmazonCleanRoomsMLEndpointResolver();
diff --git a/sdk/src/Services/CleanRoomsML/Properties/AssemblyInfo.cs b/sdk/src/Services/CleanRoomsML/Properties/AssemblyInfo.cs
index 0b657ae97c74..1fcae1e8537a 100644
--- a/sdk/src/Services/CleanRoomsML/Properties/AssemblyInfo.cs
+++ b/sdk/src/Services/CleanRoomsML/Properties/AssemblyInfo.cs
@@ -41,5 +41,9 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.302.16")]
\ No newline at end of file
+#if BCL
+[assembly: AssemblyVersion("4.0")]
+#else
+[assembly: AssemblyVersion("4.0.0.0")]
+#endif
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/src/Services/Cloud9/AWSSDK.Cloud9.NetFramework.csproj b/sdk/src/Services/Cloud9/AWSSDK.Cloud9.NetFramework.csproj
index 9d909be90d76..4ff458afb472 100644
--- a/sdk/src/Services/Cloud9/AWSSDK.Cloud9.NetFramework.csproj
+++ b/sdk/src/Services/Cloud9/AWSSDK.Cloud9.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);BCL;AWS_ASYNC_API;CODE_ANALYSIS</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(RuleSetFileForBuild)' == 'false' Or '$(RuleSetFileForBuild)' == '' ">
diff --git a/sdk/src/Services/Cloud9/AWSSDK.Cloud9.NetStandard.csproj b/sdk/src/Services/Cloud9/AWSSDK.Cloud9.NetStandard.csproj
index 35329fe4e1ea..b00fbdcf6ed4 100644
--- a/sdk/src/Services/Cloud9/AWSSDK.Cloud9.NetStandard.csproj
+++ b/sdk/src/Services/Cloud9/AWSSDK.Cloud9.NetStandard.csproj
@@ -22,6 +22,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <!-- Async Enumerable Compatibility -->
diff --git a/sdk/src/Services/Cloud9/Generated/AmazonCloud9Config.cs b/sdk/src/Services/Cloud9/Generated/AmazonCloud9Config.cs
index 0d3ee2d03011..d171d267bfea 100644
--- a/sdk/src/Services/Cloud9/Generated/AmazonCloud9Config.cs
+++ b/sdk/src/Services/Cloud9/Generated/AmazonCloud9Config.cs
@@ -34,7 +34,7 @@ namespace Amazon.Cloud9
     public partial class AmazonCloud9Config : ClientConfig
     {
         private static readonly string UserAgentString =
-            InternalSDKUtils.BuildUserAgentString("Cloud9", "3.7.301.72");
+            InternalSDKUtils.BuildUserAgentString("Cloud9", "4.0.0.0");
 
         private static readonly AmazonCloud9EndpointResolver EndpointResolver =
             new AmazonCloud9EndpointResolver();
diff --git a/sdk/src/Services/Cloud9/Properties/AssemblyInfo.cs b/sdk/src/Services/Cloud9/Properties/AssemblyInfo.cs
index 1398bf9e9327..68b217731904 100644
--- a/sdk/src/Services/Cloud9/Properties/AssemblyInfo.cs
+++ b/sdk/src/Services/Cloud9/Properties/AssemblyInfo.cs
@@ -41,5 +41,9 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.301.72")]
\ No newline at end of file
+#if BCL
+[assembly: AssemblyVersion("4.0")]
+#else
+[assembly: AssemblyVersion("4.0.0.0")]
+#endif
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/src/Services/CloudControlApi/AWSSDK.CloudControlApi.NetFramework.csproj b/sdk/src/Services/CloudControlApi/AWSSDK.CloudControlApi.NetFramework.csproj
index 8dbc4dc5ebf6..fd06cdcceedf 100644
--- a/sdk/src/Services/CloudControlApi/AWSSDK.CloudControlApi.NetFramework.csproj
+++ b/sdk/src/Services/CloudControlApi/AWSSDK.CloudControlApi.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);BCL;AWS_ASYNC_API;CODE_ANALYSIS</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(RuleSetFileForBuild)' == 'false' Or '$(RuleSetFileForBuild)' == '' ">
diff --git a/sdk/src/Services/CloudControlApi/AWSSDK.CloudControlApi.NetStandard.csproj b/sdk/src/Services/CloudControlApi/AWSSDK.CloudControlApi.NetStandard.csproj
index 483e696f070c..1d2fc08e3d76 100644
--- a/sdk/src/Services/CloudControlApi/AWSSDK.CloudControlApi.NetStandard.csproj
+++ b/sdk/src/Services/CloudControlApi/AWSSDK.CloudControlApi.NetStandard.csproj
@@ -22,6 +22,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <!-- Async Enumerable Compatibility -->
diff --git a/sdk/src/Services/CloudControlApi/Generated/AmazonCloudControlApiConfig.cs b/sdk/src/Services/CloudControlApi/Generated/AmazonCloudControlApiConfig.cs
index 10804e68bb36..8bc9c6117b92 100644
--- a/sdk/src/Services/CloudControlApi/Generated/AmazonCloudControlApiConfig.cs
+++ b/sdk/src/Services/CloudControlApi/Generated/AmazonCloudControlApiConfig.cs
@@ -34,7 +34,7 @@ namespace Amazon.CloudControlApi
     public partial class AmazonCloudControlApiConfig : ClientConfig
     {
         private static readonly string UserAgentString =
-            InternalSDKUtils.BuildUserAgentString("CloudControl", "3.7.300.84");
+            InternalSDKUtils.BuildUserAgentString("CloudControl", "4.0.0.0");
 
         private static readonly AmazonCloudControlApiEndpointResolver EndpointResolver =
             new AmazonCloudControlApiEndpointResolver();
diff --git a/sdk/src/Services/CloudControlApi/Properties/AssemblyInfo.cs b/sdk/src/Services/CloudControlApi/Properties/AssemblyInfo.cs
index 3d81ea7347d3..81aa799ca51b 100644
--- a/sdk/src/Services/CloudControlApi/Properties/AssemblyInfo.cs
+++ b/sdk/src/Services/CloudControlApi/Properties/AssemblyInfo.cs
@@ -41,5 +41,9 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.300.84")]
\ No newline at end of file
+#if BCL
+[assembly: AssemblyVersion("4.0")]
+#else
+[assembly: AssemblyVersion("4.0.0.0")]
+#endif
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/src/Services/CloudDirectory/AWSSDK.CloudDirectory.NetFramework.csproj b/sdk/src/Services/CloudDirectory/AWSSDK.CloudDirectory.NetFramework.csproj
index e554c792d4fc..b9b5f84b1d8d 100644
--- a/sdk/src/Services/CloudDirectory/AWSSDK.CloudDirectory.NetFramework.csproj
+++ b/sdk/src/Services/CloudDirectory/AWSSDK.CloudDirectory.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);BCL;AWS_ASYNC_API;CODE_ANALYSIS</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(RuleSetFileForBuild)' == 'false' Or '$(RuleSetFileForBuild)' == '' ">
diff --git a/sdk/src/Services/CloudDirectory/AWSSDK.CloudDirectory.NetStandard.csproj b/sdk/src/Services/CloudDirectory/AWSSDK.CloudDirectory.NetStandard.csproj
index 41e3a2c76eba..7863abb7a72c 100644
--- a/sdk/src/Services/CloudDirectory/AWSSDK.CloudDirectory.NetStandard.csproj
+++ b/sdk/src/Services/CloudDirectory/AWSSDK.CloudDirectory.NetStandard.csproj
@@ -22,6 +22,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <!-- Async Enumerable Compatibility -->
diff --git a/sdk/src/Services/CloudDirectory/Generated/AmazonCloudDirectoryConfig.cs b/sdk/src/Services/CloudDirectory/Generated/AmazonCloudDirectoryConfig.cs
index 789355ee8609..29f53f16a52a 100644
--- a/sdk/src/Services/CloudDirectory/Generated/AmazonCloudDirectoryConfig.cs
+++ b/sdk/src/Services/CloudDirectory/Generated/AmazonCloudDirectoryConfig.cs
@@ -34,7 +34,7 @@ namespace Amazon.CloudDirectory
     public partial class AmazonCloudDirectoryConfig : ClientConfig
     {
         private static readonly string UserAgentString =
-            InternalSDKUtils.BuildUserAgentString("CloudDirectory", "3.7.300.84");
+            InternalSDKUtils.BuildUserAgentString("CloudDirectory", "4.0.0.0");
 
         private static readonly AmazonCloudDirectoryEndpointResolver EndpointResolver =
             new AmazonCloudDirectoryEndpointResolver();
diff --git a/sdk/src/Services/CloudDirectory/Properties/AssemblyInfo.cs b/sdk/src/Services/CloudDirectory/Properties/AssemblyInfo.cs
index 456fc8c7ec6c..4ba4220548d9 100644
--- a/sdk/src/Services/CloudDirectory/Properties/AssemblyInfo.cs
+++ b/sdk/src/Services/CloudDirectory/Properties/AssemblyInfo.cs
@@ -41,5 +41,9 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.300.84")]
\ No newline at end of file
+#if BCL
+[assembly: AssemblyVersion("4.0")]
+#else
+[assembly: AssemblyVersion("4.0.0.0")]
+#endif
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/src/Services/CloudFormation/AWSSDK.CloudFormation.NetFramework.csproj b/sdk/src/Services/CloudFormation/AWSSDK.CloudFormation.NetFramework.csproj
index fa238569d5ef..31a078987ca9 100644
--- a/sdk/src/Services/CloudFormation/AWSSDK.CloudFormation.NetFramework.csproj
+++ b/sdk/src/Services/CloudFormation/AWSSDK.CloudFormation.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);BCL;AWS_ASYNC_API;CODE_ANALYSIS</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(RuleSetFileForBuild)' == 'false' Or '$(RuleSetFileForBuild)' == '' ">
diff --git a/sdk/src/Services/CloudFormation/AWSSDK.CloudFormation.NetStandard.csproj b/sdk/src/Services/CloudFormation/AWSSDK.CloudFormation.NetStandard.csproj
index 85ff6ad3bc7d..bf6eb81ad6e8 100644
--- a/sdk/src/Services/CloudFormation/AWSSDK.CloudFormation.NetStandard.csproj
+++ b/sdk/src/Services/CloudFormation/AWSSDK.CloudFormation.NetStandard.csproj
@@ -22,6 +22,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <!-- Async Enumerable Compatibility -->
diff --git a/sdk/src/Services/CloudFormation/Generated/AmazonCloudFormationConfig.cs b/sdk/src/Services/CloudFormation/Generated/AmazonCloudFormationConfig.cs
index e8e567a093e1..d885148c87ed 100644
--- a/sdk/src/Services/CloudFormation/Generated/AmazonCloudFormationConfig.cs
+++ b/sdk/src/Services/CloudFormation/Generated/AmazonCloudFormationConfig.cs
@@ -34,7 +34,7 @@ namespace Amazon.CloudFormation
     public partial class AmazonCloudFormationConfig : ClientConfig
     {
         private static readonly string UserAgentString =
-            InternalSDKUtils.BuildUserAgentString("CloudFormation", "3.7.307.10");
+            InternalSDKUtils.BuildUserAgentString("CloudFormation", "4.0.0.0");
 
         private static readonly AmazonCloudFormationEndpointResolver EndpointResolver =
             new AmazonCloudFormationEndpointResolver();
diff --git a/sdk/src/Services/CloudFormation/Properties/AssemblyInfo.cs b/sdk/src/Services/CloudFormation/Properties/AssemblyInfo.cs
index 85042eb3b913..4e4308b89623 100644
--- a/sdk/src/Services/CloudFormation/Properties/AssemblyInfo.cs
+++ b/sdk/src/Services/CloudFormation/Properties/AssemblyInfo.cs
@@ -41,5 +41,9 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.307.10")]
\ No newline at end of file
+#if BCL
+[assembly: AssemblyVersion("4.0")]
+#else
+[assembly: AssemblyVersion("4.0.0.0")]
+#endif
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/src/Services/CloudFront/AWSSDK.CloudFront.NetFramework.csproj b/sdk/src/Services/CloudFront/AWSSDK.CloudFront.NetFramework.csproj
index 8efd73df81c7..090bc4c990ba 100644
--- a/sdk/src/Services/CloudFront/AWSSDK.CloudFront.NetFramework.csproj
+++ b/sdk/src/Services/CloudFront/AWSSDK.CloudFront.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);BCL;AWS_ASYNC_API;CODE_ANALYSIS</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(RuleSetFileForBuild)' == 'false' Or '$(RuleSetFileForBuild)' == '' ">
diff --git a/sdk/src/Services/CloudFront/AWSSDK.CloudFront.NetStandard.csproj b/sdk/src/Services/CloudFront/AWSSDK.CloudFront.NetStandard.csproj
index f9902e2dabd2..4ce06b5f4f9f 100644
--- a/sdk/src/Services/CloudFront/AWSSDK.CloudFront.NetStandard.csproj
+++ b/sdk/src/Services/CloudFront/AWSSDK.CloudFront.NetStandard.csproj
@@ -22,6 +22,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <!-- Async Enumerable Compatibility -->
diff --git a/sdk/src/Services/CloudFront/Generated/AmazonCloudFrontConfig.cs b/sdk/src/Services/CloudFront/Generated/AmazonCloudFrontConfig.cs
index dbff4969c612..dc7c0e0558a7 100644
--- a/sdk/src/Services/CloudFront/Generated/AmazonCloudFrontConfig.cs
+++ b/sdk/src/Services/CloudFront/Generated/AmazonCloudFrontConfig.cs
@@ -34,7 +34,7 @@ namespace Amazon.CloudFront
     public partial class AmazonCloudFrontConfig : ClientConfig
     {
         private static readonly string UserAgentString =
-            InternalSDKUtils.BuildUserAgentString("CloudFront", "3.7.302.10");
+            InternalSDKUtils.BuildUserAgentString("CloudFront", "4.0.0.0");
 
         private static readonly AmazonCloudFrontEndpointResolver EndpointResolver =
             new AmazonCloudFrontEndpointResolver();
diff --git a/sdk/src/Services/CloudFront/Properties/AssemblyInfo.cs b/sdk/src/Services/CloudFront/Properties/AssemblyInfo.cs
index d1f413a4133f..4e8f8d351231 100644
--- a/sdk/src/Services/CloudFront/Properties/AssemblyInfo.cs
+++ b/sdk/src/Services/CloudFront/Properties/AssemblyInfo.cs
@@ -41,5 +41,9 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3.4.0")]
-[assembly: AssemblyFileVersion("3.7.302.10")]
\ No newline at end of file
+#if BCL
+[assembly: AssemblyVersion("4.0")]
+#else
+[assembly: AssemblyVersion("4.0.0.0")]
+#endif
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/src/Services/CloudFrontKeyValueStore/AWSSDK.CloudFrontKeyValueStore.NetFramework.csproj b/sdk/src/Services/CloudFrontKeyValueStore/AWSSDK.CloudFrontKeyValueStore.NetFramework.csproj
index bf1df0a23598..2f17cc006d8b 100644
--- a/sdk/src/Services/CloudFrontKeyValueStore/AWSSDK.CloudFrontKeyValueStore.NetFramework.csproj
+++ b/sdk/src/Services/CloudFrontKeyValueStore/AWSSDK.CloudFrontKeyValueStore.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);BCL;AWS_ASYNC_API;CODE_ANALYSIS</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(RuleSetFileForBuild)' == 'false' Or '$(RuleSetFileForBuild)' == '' ">
diff --git a/sdk/src/Services/CloudFrontKeyValueStore/AWSSDK.CloudFrontKeyValueStore.NetStandard.csproj b/sdk/src/Services/CloudFrontKeyValueStore/AWSSDK.CloudFrontKeyValueStore.NetStandard.csproj
index 21c45fc90987..3d313ed386e1 100644
--- a/sdk/src/Services/CloudFrontKeyValueStore/AWSSDK.CloudFrontKeyValueStore.NetStandard.csproj
+++ b/sdk/src/Services/CloudFrontKeyValueStore/AWSSDK.CloudFrontKeyValueStore.NetStandard.csproj
@@ -22,6 +22,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <!-- Async Enumerable Compatibility -->
diff --git a/sdk/src/Services/CloudFrontKeyValueStore/Generated/AmazonCloudFrontKeyValueStoreConfig.cs b/sdk/src/Services/CloudFrontKeyValueStore/Generated/AmazonCloudFrontKeyValueStoreConfig.cs
index 60bccf072690..282a9bd036e6 100644
--- a/sdk/src/Services/CloudFrontKeyValueStore/Generated/AmazonCloudFrontKeyValueStoreConfig.cs
+++ b/sdk/src/Services/CloudFrontKeyValueStore/Generated/AmazonCloudFrontKeyValueStoreConfig.cs
@@ -34,7 +34,7 @@ namespace Amazon.CloudFrontKeyValueStore
     public partial class AmazonCloudFrontKeyValueStoreConfig : ClientConfig
     {
         private static readonly string UserAgentString =
-            InternalSDKUtils.BuildUserAgentString("CloudFront KeyValueStore", "3.7.301.45");
+            InternalSDKUtils.BuildUserAgentString("CloudFront KeyValueStore", "4.0.0.0");
 
         private static readonly AmazonCloudFrontKeyValueStoreEndpointResolver EndpointResolver =
             new AmazonCloudFrontKeyValueStoreEndpointResolver();
diff --git a/sdk/src/Services/CloudFrontKeyValueStore/Properties/AssemblyInfo.cs b/sdk/src/Services/CloudFrontKeyValueStore/Properties/AssemblyInfo.cs
index 03680cf93bf9..9123229b7f33 100644
--- a/sdk/src/Services/CloudFrontKeyValueStore/Properties/AssemblyInfo.cs
+++ b/sdk/src/Services/CloudFrontKeyValueStore/Properties/AssemblyInfo.cs
@@ -41,5 +41,9 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.301.45")]
\ No newline at end of file
+#if BCL
+[assembly: AssemblyVersion("4.0")]
+#else
+[assembly: AssemblyVersion("4.0.0.0")]
+#endif
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/src/Services/CloudHSM/AWSSDK.CloudHSM.NetFramework.csproj b/sdk/src/Services/CloudHSM/AWSSDK.CloudHSM.NetFramework.csproj
index 27b1c6425781..cd1c99783715 100644
--- a/sdk/src/Services/CloudHSM/AWSSDK.CloudHSM.NetFramework.csproj
+++ b/sdk/src/Services/CloudHSM/AWSSDK.CloudHSM.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);BCL;AWS_ASYNC_API;CODE_ANALYSIS</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(RuleSetFileForBuild)' == 'false' Or '$(RuleSetFileForBuild)' == '' ">
diff --git a/sdk/src/Services/CloudHSM/AWSSDK.CloudHSM.NetStandard.csproj b/sdk/src/Services/CloudHSM/AWSSDK.CloudHSM.NetStandard.csproj
index e4362bb092ee..5b9fce023e70 100644
--- a/sdk/src/Services/CloudHSM/AWSSDK.CloudHSM.NetStandard.csproj
+++ b/sdk/src/Services/CloudHSM/AWSSDK.CloudHSM.NetStandard.csproj
@@ -22,6 +22,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <!-- Async Enumerable Compatibility -->
diff --git a/sdk/src/Services/CloudHSM/Generated/AmazonCloudHSMConfig.cs b/sdk/src/Services/CloudHSM/Generated/AmazonCloudHSMConfig.cs
index 32201e8e12e2..e5d5e9c2e5e2 100644
--- a/sdk/src/Services/CloudHSM/Generated/AmazonCloudHSMConfig.cs
+++ b/sdk/src/Services/CloudHSM/Generated/AmazonCloudHSMConfig.cs
@@ -34,7 +34,7 @@ namespace Amazon.CloudHSM
     public partial class AmazonCloudHSMConfig : ClientConfig
     {
         private static readonly string UserAgentString =
-            InternalSDKUtils.BuildUserAgentString("CloudHSM", "3.7.300.84");
+            InternalSDKUtils.BuildUserAgentString("CloudHSM", "4.0.0.0");
 
         private static readonly AmazonCloudHSMEndpointResolver EndpointResolver =
             new AmazonCloudHSMEndpointResolver();
diff --git a/sdk/src/Services/CloudHSM/Properties/AssemblyInfo.cs b/sdk/src/Services/CloudHSM/Properties/AssemblyInfo.cs
index 06e73b4909be..ec337b65ca74 100644
--- a/sdk/src/Services/CloudHSM/Properties/AssemblyInfo.cs
+++ b/sdk/src/Services/CloudHSM/Properties/AssemblyInfo.cs
@@ -41,5 +41,9 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.300.84")]
\ No newline at end of file
+#if BCL
+[assembly: AssemblyVersion("4.0")]
+#else
+[assembly: AssemblyVersion("4.0.0.0")]
+#endif
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/src/Services/CloudHSMV2/AWSSDK.CloudHSMV2.NetFramework.csproj b/sdk/src/Services/CloudHSMV2/AWSSDK.CloudHSMV2.NetFramework.csproj
index 9b18fd0b2fc0..12c9f4df5e91 100644
--- a/sdk/src/Services/CloudHSMV2/AWSSDK.CloudHSMV2.NetFramework.csproj
+++ b/sdk/src/Services/CloudHSMV2/AWSSDK.CloudHSMV2.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);BCL;AWS_ASYNC_API;CODE_ANALYSIS</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(RuleSetFileForBuild)' == 'false' Or '$(RuleSetFileForBuild)' == '' ">
diff --git a/sdk/src/Services/CloudHSMV2/AWSSDK.CloudHSMV2.NetStandard.csproj b/sdk/src/Services/CloudHSMV2/AWSSDK.CloudHSMV2.NetStandard.csproj
index efcc08d176d0..c0e4c371b541 100644
--- a/sdk/src/Services/CloudHSMV2/AWSSDK.CloudHSMV2.NetStandard.csproj
+++ b/sdk/src/Services/CloudHSMV2/AWSSDK.CloudHSMV2.NetStandard.csproj
@@ -22,6 +22,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <!-- Async Enumerable Compatibility -->
diff --git a/sdk/src/Services/CloudHSMV2/Generated/AmazonCloudHSMV2Config.cs b/sdk/src/Services/CloudHSMV2/Generated/AmazonCloudHSMV2Config.cs
index a405c1419ced..f963cfd16422 100644
--- a/sdk/src/Services/CloudHSMV2/Generated/AmazonCloudHSMV2Config.cs
+++ b/sdk/src/Services/CloudHSMV2/Generated/AmazonCloudHSMV2Config.cs
@@ -34,7 +34,7 @@ namespace Amazon.CloudHSMV2
     public partial class AmazonCloudHSMV2Config : ClientConfig
     {
         private static readonly string UserAgentString =
-            InternalSDKUtils.BuildUserAgentString("CloudHSM V2", "3.7.300.84");
+            InternalSDKUtils.BuildUserAgentString("CloudHSM V2", "4.0.0.0");
 
         private static readonly AmazonCloudHSMV2EndpointResolver EndpointResolver =
             new AmazonCloudHSMV2EndpointResolver();
diff --git a/sdk/src/Services/CloudHSMV2/Properties/AssemblyInfo.cs b/sdk/src/Services/CloudHSMV2/Properties/AssemblyInfo.cs
index 8364e0740d3e..abe0aec38fae 100644
--- a/sdk/src/Services/CloudHSMV2/Properties/AssemblyInfo.cs
+++ b/sdk/src/Services/CloudHSMV2/Properties/AssemblyInfo.cs
@@ -41,5 +41,9 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.300.84")]
\ No newline at end of file
+#if BCL
+[assembly: AssemblyVersion("4.0")]
+#else
+[assembly: AssemblyVersion("4.0.0.0")]
+#endif
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/src/Services/CloudSearch/AWSSDK.CloudSearch.NetFramework.csproj b/sdk/src/Services/CloudSearch/AWSSDK.CloudSearch.NetFramework.csproj
index dbb159142bcb..947ff59bd852 100644
--- a/sdk/src/Services/CloudSearch/AWSSDK.CloudSearch.NetFramework.csproj
+++ b/sdk/src/Services/CloudSearch/AWSSDK.CloudSearch.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);BCL;AWS_ASYNC_API;CODE_ANALYSIS</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(RuleSetFileForBuild)' == 'false' Or '$(RuleSetFileForBuild)' == '' ">
diff --git a/sdk/src/Services/CloudSearch/AWSSDK.CloudSearch.NetStandard.csproj b/sdk/src/Services/CloudSearch/AWSSDK.CloudSearch.NetStandard.csproj
index aa3a23293a95..5880a79d84f4 100644
--- a/sdk/src/Services/CloudSearch/AWSSDK.CloudSearch.NetStandard.csproj
+++ b/sdk/src/Services/CloudSearch/AWSSDK.CloudSearch.NetStandard.csproj
@@ -22,6 +22,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <!-- Async Enumerable Compatibility -->
diff --git a/sdk/src/Services/CloudSearch/Generated/AmazonCloudSearchConfig.cs b/sdk/src/Services/CloudSearch/Generated/AmazonCloudSearchConfig.cs
index 622543faf60f..f303bd773a07 100644
--- a/sdk/src/Services/CloudSearch/Generated/AmazonCloudSearchConfig.cs
+++ b/sdk/src/Services/CloudSearch/Generated/AmazonCloudSearchConfig.cs
@@ -34,7 +34,7 @@ namespace Amazon.CloudSearch
     public partial class AmazonCloudSearchConfig : ClientConfig
     {
         private static readonly string UserAgentString =
-            InternalSDKUtils.BuildUserAgentString("CloudSearch", "3.7.300.84");
+            InternalSDKUtils.BuildUserAgentString("CloudSearch", "4.0.0.0");
 
         private static readonly AmazonCloudSearchEndpointResolver EndpointResolver =
             new AmazonCloudSearchEndpointResolver();
diff --git a/sdk/src/Services/CloudSearch/Properties/AssemblyInfo.cs b/sdk/src/Services/CloudSearch/Properties/AssemblyInfo.cs
index d7f473096a6e..e64708abb1a2 100644
--- a/sdk/src/Services/CloudSearch/Properties/AssemblyInfo.cs
+++ b/sdk/src/Services/CloudSearch/Properties/AssemblyInfo.cs
@@ -41,5 +41,9 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.300.84")]
\ No newline at end of file
+#if BCL
+[assembly: AssemblyVersion("4.0")]
+#else
+[assembly: AssemblyVersion("4.0.0.0")]
+#endif
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/src/Services/CloudSearchDomain/AWSSDK.CloudSearchDomain.NetFramework.csproj b/sdk/src/Services/CloudSearchDomain/AWSSDK.CloudSearchDomain.NetFramework.csproj
index c091c210721a..65c815e6d374 100644
--- a/sdk/src/Services/CloudSearchDomain/AWSSDK.CloudSearchDomain.NetFramework.csproj
+++ b/sdk/src/Services/CloudSearchDomain/AWSSDK.CloudSearchDomain.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);BCL;AWS_ASYNC_API;CODE_ANALYSIS</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(RuleSetFileForBuild)' == 'false' Or '$(RuleSetFileForBuild)' == '' ">
diff --git a/sdk/src/Services/CloudSearchDomain/AWSSDK.CloudSearchDomain.NetStandard.csproj b/sdk/src/Services/CloudSearchDomain/AWSSDK.CloudSearchDomain.NetStandard.csproj
index 95087aa0ddef..5c44d043d655 100644
--- a/sdk/src/Services/CloudSearchDomain/AWSSDK.CloudSearchDomain.NetStandard.csproj
+++ b/sdk/src/Services/CloudSearchDomain/AWSSDK.CloudSearchDomain.NetStandard.csproj
@@ -22,6 +22,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <!-- Async Enumerable Compatibility -->
diff --git a/sdk/src/Services/CloudSearchDomain/Generated/AmazonCloudSearchDomainConfig.cs b/sdk/src/Services/CloudSearchDomain/Generated/AmazonCloudSearchDomainConfig.cs
index 5501ae2cfd3d..df8c94410e25 100644
--- a/sdk/src/Services/CloudSearchDomain/Generated/AmazonCloudSearchDomainConfig.cs
+++ b/sdk/src/Services/CloudSearchDomain/Generated/AmazonCloudSearchDomainConfig.cs
@@ -34,7 +34,7 @@ namespace Amazon.CloudSearchDomain
     public partial class AmazonCloudSearchDomainConfig : ClientConfig
     {
         private static readonly string UserAgentString =
-            InternalSDKUtils.BuildUserAgentString("CloudSearch Domain", "3.7.300.84");
+            InternalSDKUtils.BuildUserAgentString("CloudSearch Domain", "4.0.0.0");
 
         private static readonly AmazonCloudSearchDomainEndpointResolver EndpointResolver =
             new AmazonCloudSearchDomainEndpointResolver();
diff --git a/sdk/src/Services/CloudSearchDomain/Properties/AssemblyInfo.cs b/sdk/src/Services/CloudSearchDomain/Properties/AssemblyInfo.cs
index a7128fefaf9b..cd2f0ffe8cc3 100644
--- a/sdk/src/Services/CloudSearchDomain/Properties/AssemblyInfo.cs
+++ b/sdk/src/Services/CloudSearchDomain/Properties/AssemblyInfo.cs
@@ -41,5 +41,9 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.300.84")]
\ No newline at end of file
+#if BCL
+[assembly: AssemblyVersion("4.0")]
+#else
+[assembly: AssemblyVersion("4.0.0.0")]
+#endif
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/src/Services/CloudTrail/AWSSDK.CloudTrail.NetFramework.csproj b/sdk/src/Services/CloudTrail/AWSSDK.CloudTrail.NetFramework.csproj
index b0a3d2983171..490a7a235c96 100644
--- a/sdk/src/Services/CloudTrail/AWSSDK.CloudTrail.NetFramework.csproj
+++ b/sdk/src/Services/CloudTrail/AWSSDK.CloudTrail.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);BCL;AWS_ASYNC_API;CODE_ANALYSIS</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(RuleSetFileForBuild)' == 'false' Or '$(RuleSetFileForBuild)' == '' ">
diff --git a/sdk/src/Services/CloudTrail/AWSSDK.CloudTrail.NetStandard.csproj b/sdk/src/Services/CloudTrail/AWSSDK.CloudTrail.NetStandard.csproj
index 3b74d5ee2dbe..a61e0c73cfa3 100644
--- a/sdk/src/Services/CloudTrail/AWSSDK.CloudTrail.NetStandard.csproj
+++ b/sdk/src/Services/CloudTrail/AWSSDK.CloudTrail.NetStandard.csproj
@@ -22,6 +22,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <!-- Async Enumerable Compatibility -->
diff --git a/sdk/src/Services/CloudTrail/Generated/AmazonCloudTrailConfig.cs b/sdk/src/Services/CloudTrail/Generated/AmazonCloudTrailConfig.cs
index 29023192ea5a..1eaa8271416d 100644
--- a/sdk/src/Services/CloudTrail/Generated/AmazonCloudTrailConfig.cs
+++ b/sdk/src/Services/CloudTrail/Generated/AmazonCloudTrailConfig.cs
@@ -34,7 +34,7 @@ namespace Amazon.CloudTrail
     public partial class AmazonCloudTrailConfig : ClientConfig
     {
         private static readonly string UserAgentString =
-            InternalSDKUtils.BuildUserAgentString("CloudTrail", "3.7.304.29");
+            InternalSDKUtils.BuildUserAgentString("CloudTrail", "4.0.0.0");
 
         private static readonly AmazonCloudTrailEndpointResolver EndpointResolver =
             new AmazonCloudTrailEndpointResolver();
diff --git a/sdk/src/Services/CloudTrail/Properties/AssemblyInfo.cs b/sdk/src/Services/CloudTrail/Properties/AssemblyInfo.cs
index b1c050480730..069e82f13a7c 100644
--- a/sdk/src/Services/CloudTrail/Properties/AssemblyInfo.cs
+++ b/sdk/src/Services/CloudTrail/Properties/AssemblyInfo.cs
@@ -41,5 +41,9 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.304.29")]
\ No newline at end of file
+#if BCL
+[assembly: AssemblyVersion("4.0")]
+#else
+[assembly: AssemblyVersion("4.0.0.0")]
+#endif
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/src/Services/CloudTrailData/AWSSDK.CloudTrailData.NetFramework.csproj b/sdk/src/Services/CloudTrailData/AWSSDK.CloudTrailData.NetFramework.csproj
index 8bbc8ceab3d7..05e5da2a6c18 100644
--- a/sdk/src/Services/CloudTrailData/AWSSDK.CloudTrailData.NetFramework.csproj
+++ b/sdk/src/Services/CloudTrailData/AWSSDK.CloudTrailData.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);BCL;AWS_ASYNC_API;CODE_ANALYSIS</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(RuleSetFileForBuild)' == 'false' Or '$(RuleSetFileForBuild)' == '' ">
diff --git a/sdk/src/Services/CloudTrailData/AWSSDK.CloudTrailData.NetStandard.csproj b/sdk/src/Services/CloudTrailData/AWSSDK.CloudTrailData.NetStandard.csproj
index e75a10126242..4d8af097e839 100644
--- a/sdk/src/Services/CloudTrailData/AWSSDK.CloudTrailData.NetStandard.csproj
+++ b/sdk/src/Services/CloudTrailData/AWSSDK.CloudTrailData.NetStandard.csproj
@@ -22,6 +22,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <!-- Async Enumerable Compatibility -->
diff --git a/sdk/src/Services/CloudTrailData/Generated/AmazonCloudTrailDataConfig.cs b/sdk/src/Services/CloudTrailData/Generated/AmazonCloudTrailDataConfig.cs
index 971104fcac3b..4cec5506e4c8 100644
--- a/sdk/src/Services/CloudTrailData/Generated/AmazonCloudTrailDataConfig.cs
+++ b/sdk/src/Services/CloudTrailData/Generated/AmazonCloudTrailDataConfig.cs
@@ -34,7 +34,7 @@ namespace Amazon.CloudTrailData
     public partial class AmazonCloudTrailDataConfig : ClientConfig
     {
         private static readonly string UserAgentString =
-            InternalSDKUtils.BuildUserAgentString("CloudTrail Data", "3.7.300.84");
+            InternalSDKUtils.BuildUserAgentString("CloudTrail Data", "4.0.0.0");
 
         private static readonly AmazonCloudTrailDataEndpointResolver EndpointResolver =
             new AmazonCloudTrailDataEndpointResolver();
diff --git a/sdk/src/Services/CloudTrailData/Properties/AssemblyInfo.cs b/sdk/src/Services/CloudTrailData/Properties/AssemblyInfo.cs
index 2da7df2321c6..151bc9b500a7 100644
--- a/sdk/src/Services/CloudTrailData/Properties/AssemblyInfo.cs
+++ b/sdk/src/Services/CloudTrailData/Properties/AssemblyInfo.cs
@@ -41,5 +41,9 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.300.84")]
\ No newline at end of file
+#if BCL
+[assembly: AssemblyVersion("4.0")]
+#else
+[assembly: AssemblyVersion("4.0.0.0")]
+#endif
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/src/Services/CloudWatch/AWSSDK.CloudWatch.NetFramework.csproj b/sdk/src/Services/CloudWatch/AWSSDK.CloudWatch.NetFramework.csproj
index 28f60c4ecb25..bca31d54260a 100644
--- a/sdk/src/Services/CloudWatch/AWSSDK.CloudWatch.NetFramework.csproj
+++ b/sdk/src/Services/CloudWatch/AWSSDK.CloudWatch.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);BCL;AWS_ASYNC_API;CODE_ANALYSIS</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(RuleSetFileForBuild)' == 'false' Or '$(RuleSetFileForBuild)' == '' ">
diff --git a/sdk/src/Services/CloudWatch/AWSSDK.CloudWatch.NetStandard.csproj b/sdk/src/Services/CloudWatch/AWSSDK.CloudWatch.NetStandard.csproj
index 648f51ee43d6..9c96e5978cfa 100644
--- a/sdk/src/Services/CloudWatch/AWSSDK.CloudWatch.NetStandard.csproj
+++ b/sdk/src/Services/CloudWatch/AWSSDK.CloudWatch.NetStandard.csproj
@@ -22,6 +22,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <!-- Async Enumerable Compatibility -->
diff --git a/sdk/src/Services/CloudWatch/Generated/AmazonCloudWatchConfig.cs b/sdk/src/Services/CloudWatch/Generated/AmazonCloudWatchConfig.cs
index 5b06efa13c80..9e9683fc2379 100644
--- a/sdk/src/Services/CloudWatch/Generated/AmazonCloudWatchConfig.cs
+++ b/sdk/src/Services/CloudWatch/Generated/AmazonCloudWatchConfig.cs
@@ -34,7 +34,7 @@ namespace Amazon.CloudWatch
     public partial class AmazonCloudWatchConfig : ClientConfig
     {
         private static readonly string UserAgentString =
-            InternalSDKUtils.BuildUserAgentString("CloudWatch", "3.7.304.10");
+            InternalSDKUtils.BuildUserAgentString("CloudWatch", "4.0.0.0");
 
         private static readonly AmazonCloudWatchEndpointResolver EndpointResolver =
             new AmazonCloudWatchEndpointResolver();
diff --git a/sdk/src/Services/CloudWatch/Properties/AssemblyInfo.cs b/sdk/src/Services/CloudWatch/Properties/AssemblyInfo.cs
index 12eafbf1dfba..009df8f63c38 100644
--- a/sdk/src/Services/CloudWatch/Properties/AssemblyInfo.cs
+++ b/sdk/src/Services/CloudWatch/Properties/AssemblyInfo.cs
@@ -41,5 +41,9 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.304.10")]
\ No newline at end of file
+#if BCL
+[assembly: AssemblyVersion("4.0")]
+#else
+[assembly: AssemblyVersion("4.0.0.0")]
+#endif
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/src/Services/CloudWatchEvents/AWSSDK.CloudWatchEvents.NetFramework.csproj b/sdk/src/Services/CloudWatchEvents/AWSSDK.CloudWatchEvents.NetFramework.csproj
index 508f3505d5cb..ad75f9adde85 100644
--- a/sdk/src/Services/CloudWatchEvents/AWSSDK.CloudWatchEvents.NetFramework.csproj
+++ b/sdk/src/Services/CloudWatchEvents/AWSSDK.CloudWatchEvents.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);BCL;AWS_ASYNC_API;CODE_ANALYSIS</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(RuleSetFileForBuild)' == 'false' Or '$(RuleSetFileForBuild)' == '' ">
diff --git a/sdk/src/Services/CloudWatchEvents/AWSSDK.CloudWatchEvents.NetStandard.csproj b/sdk/src/Services/CloudWatchEvents/AWSSDK.CloudWatchEvents.NetStandard.csproj
index 83c1228af96f..5c2f54510603 100644
--- a/sdk/src/Services/CloudWatchEvents/AWSSDK.CloudWatchEvents.NetStandard.csproj
+++ b/sdk/src/Services/CloudWatchEvents/AWSSDK.CloudWatchEvents.NetStandard.csproj
@@ -22,6 +22,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <!-- Async Enumerable Compatibility -->
diff --git a/sdk/src/Services/CloudWatchEvents/Generated/AmazonCloudWatchEventsConfig.cs b/sdk/src/Services/CloudWatchEvents/Generated/AmazonCloudWatchEventsConfig.cs
index c169d6a32f8c..1543cd8cb9e0 100644
--- a/sdk/src/Services/CloudWatchEvents/Generated/AmazonCloudWatchEventsConfig.cs
+++ b/sdk/src/Services/CloudWatchEvents/Generated/AmazonCloudWatchEventsConfig.cs
@@ -34,7 +34,7 @@ namespace Amazon.CloudWatchEvents
     public partial class AmazonCloudWatchEventsConfig : ClientConfig
     {
         private static readonly string UserAgentString =
-            InternalSDKUtils.BuildUserAgentString("CloudWatch Events", "3.7.300.84");
+            InternalSDKUtils.BuildUserAgentString("CloudWatch Events", "4.0.0.0");
 
         private static readonly AmazonCloudWatchEventsEndpointResolver EndpointResolver =
             new AmazonCloudWatchEventsEndpointResolver();
diff --git a/sdk/src/Services/CloudWatchEvents/Properties/AssemblyInfo.cs b/sdk/src/Services/CloudWatchEvents/Properties/AssemblyInfo.cs
index 73efca576e0d..36f0f2956d30 100644
--- a/sdk/src/Services/CloudWatchEvents/Properties/AssemblyInfo.cs
+++ b/sdk/src/Services/CloudWatchEvents/Properties/AssemblyInfo.cs
@@ -41,5 +41,9 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.300.84")]
\ No newline at end of file
+#if BCL
+[assembly: AssemblyVersion("4.0")]
+#else
+[assembly: AssemblyVersion("4.0.0.0")]
+#endif
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/src/Services/CloudWatchEvidently/AWSSDK.CloudWatchEvidently.NetFramework.csproj b/sdk/src/Services/CloudWatchEvidently/AWSSDK.CloudWatchEvidently.NetFramework.csproj
index 924a463e0e7e..8ae6f0cdc89f 100644
--- a/sdk/src/Services/CloudWatchEvidently/AWSSDK.CloudWatchEvidently.NetFramework.csproj
+++ b/sdk/src/Services/CloudWatchEvidently/AWSSDK.CloudWatchEvidently.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);BCL;AWS_ASYNC_API;CODE_ANALYSIS</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(RuleSetFileForBuild)' == 'false' Or '$(RuleSetFileForBuild)' == '' ">
diff --git a/sdk/src/Services/CloudWatchEvidently/AWSSDK.CloudWatchEvidently.NetStandard.csproj b/sdk/src/Services/CloudWatchEvidently/AWSSDK.CloudWatchEvidently.NetStandard.csproj
index 047c29645901..160fd92a83a8 100644
--- a/sdk/src/Services/CloudWatchEvidently/AWSSDK.CloudWatchEvidently.NetStandard.csproj
+++ b/sdk/src/Services/CloudWatchEvidently/AWSSDK.CloudWatchEvidently.NetStandard.csproj
@@ -22,6 +22,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <!-- Async Enumerable Compatibility -->
diff --git a/sdk/src/Services/CloudWatchEvidently/Generated/AmazonCloudWatchEvidentlyConfig.cs b/sdk/src/Services/CloudWatchEvidently/Generated/AmazonCloudWatchEvidentlyConfig.cs
index a4aed140cfd0..4d683cdda27d 100644
--- a/sdk/src/Services/CloudWatchEvidently/Generated/AmazonCloudWatchEvidentlyConfig.cs
+++ b/sdk/src/Services/CloudWatchEvidently/Generated/AmazonCloudWatchEvidentlyConfig.cs
@@ -34,7 +34,7 @@ namespace Amazon.CloudWatchEvidently
     public partial class AmazonCloudWatchEvidentlyConfig : ClientConfig
     {
         private static readonly string UserAgentString =
-            InternalSDKUtils.BuildUserAgentString("Evidently", "3.7.300.84");
+            InternalSDKUtils.BuildUserAgentString("Evidently", "4.0.0.0");
 
         private static readonly AmazonCloudWatchEvidentlyEndpointResolver EndpointResolver =
             new AmazonCloudWatchEvidentlyEndpointResolver();
diff --git a/sdk/src/Services/CloudWatchEvidently/Properties/AssemblyInfo.cs b/sdk/src/Services/CloudWatchEvidently/Properties/AssemblyInfo.cs
index a9354ba28c0f..831aeea3aea3 100644
--- a/sdk/src/Services/CloudWatchEvidently/Properties/AssemblyInfo.cs
+++ b/sdk/src/Services/CloudWatchEvidently/Properties/AssemblyInfo.cs
@@ -41,5 +41,9 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.300.84")]
\ No newline at end of file
+#if BCL
+[assembly: AssemblyVersion("4.0")]
+#else
+[assembly: AssemblyVersion("4.0.0.0")]
+#endif
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/src/Services/CloudWatchLogs/AWSSDK.CloudWatchLogs.NetFramework.csproj b/sdk/src/Services/CloudWatchLogs/AWSSDK.CloudWatchLogs.NetFramework.csproj
index 2f5ed695b816..61ef809f38ed 100644
--- a/sdk/src/Services/CloudWatchLogs/AWSSDK.CloudWatchLogs.NetFramework.csproj
+++ b/sdk/src/Services/CloudWatchLogs/AWSSDK.CloudWatchLogs.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);BCL;AWS_ASYNC_API;CODE_ANALYSIS</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(RuleSetFileForBuild)' == 'false' Or '$(RuleSetFileForBuild)' == '' ">
diff --git a/sdk/src/Services/CloudWatchLogs/AWSSDK.CloudWatchLogs.NetStandard.csproj b/sdk/src/Services/CloudWatchLogs/AWSSDK.CloudWatchLogs.NetStandard.csproj
index bc4f08a2283e..44f5e37f13a2 100644
--- a/sdk/src/Services/CloudWatchLogs/AWSSDK.CloudWatchLogs.NetStandard.csproj
+++ b/sdk/src/Services/CloudWatchLogs/AWSSDK.CloudWatchLogs.NetStandard.csproj
@@ -22,6 +22,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <!-- Async Enumerable Compatibility -->
diff --git a/sdk/src/Services/CloudWatchLogs/Generated/AmazonCloudWatchLogsConfig.cs b/sdk/src/Services/CloudWatchLogs/Generated/AmazonCloudWatchLogsConfig.cs
index dae8a745d19b..ee9965996d13 100644
--- a/sdk/src/Services/CloudWatchLogs/Generated/AmazonCloudWatchLogsConfig.cs
+++ b/sdk/src/Services/CloudWatchLogs/Generated/AmazonCloudWatchLogsConfig.cs
@@ -34,7 +34,7 @@ namespace Amazon.CloudWatchLogs
     public partial class AmazonCloudWatchLogsConfig : ClientConfig
     {
         private static readonly string UserAgentString =
-            InternalSDKUtils.BuildUserAgentString("CloudWatch Logs", "3.7.305.25");
+            InternalSDKUtils.BuildUserAgentString("CloudWatch Logs", "4.0.0.0");
 
         private static readonly AmazonCloudWatchLogsEndpointResolver EndpointResolver =
             new AmazonCloudWatchLogsEndpointResolver();
diff --git a/sdk/src/Services/CloudWatchLogs/Properties/AssemblyInfo.cs b/sdk/src/Services/CloudWatchLogs/Properties/AssemblyInfo.cs
index a13309367de3..8d1f2b0dd6cf 100644
--- a/sdk/src/Services/CloudWatchLogs/Properties/AssemblyInfo.cs
+++ b/sdk/src/Services/CloudWatchLogs/Properties/AssemblyInfo.cs
@@ -41,5 +41,9 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.305.25")]
\ No newline at end of file
+#if BCL
+[assembly: AssemblyVersion("4.0")]
+#else
+[assembly: AssemblyVersion("4.0.0.0")]
+#endif
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/src/Services/CloudWatchRUM/AWSSDK.CloudWatchRUM.NetFramework.csproj b/sdk/src/Services/CloudWatchRUM/AWSSDK.CloudWatchRUM.NetFramework.csproj
index 2bc7720cc838..e58548dd58a1 100644
--- a/sdk/src/Services/CloudWatchRUM/AWSSDK.CloudWatchRUM.NetFramework.csproj
+++ b/sdk/src/Services/CloudWatchRUM/AWSSDK.CloudWatchRUM.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);BCL;AWS_ASYNC_API;CODE_ANALYSIS</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(RuleSetFileForBuild)' == 'false' Or '$(RuleSetFileForBuild)' == '' ">
diff --git a/sdk/src/Services/CloudWatchRUM/AWSSDK.CloudWatchRUM.NetStandard.csproj b/sdk/src/Services/CloudWatchRUM/AWSSDK.CloudWatchRUM.NetStandard.csproj
index f948df1c48e4..1ba5b185d620 100644
--- a/sdk/src/Services/CloudWatchRUM/AWSSDK.CloudWatchRUM.NetStandard.csproj
+++ b/sdk/src/Services/CloudWatchRUM/AWSSDK.CloudWatchRUM.NetStandard.csproj
@@ -22,6 +22,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <!-- Async Enumerable Compatibility -->
diff --git a/sdk/src/Services/CloudWatchRUM/Generated/AmazonCloudWatchRUMConfig.cs b/sdk/src/Services/CloudWatchRUM/Generated/AmazonCloudWatchRUMConfig.cs
index dca1d33c7c14..8798a92bd407 100644
--- a/sdk/src/Services/CloudWatchRUM/Generated/AmazonCloudWatchRUMConfig.cs
+++ b/sdk/src/Services/CloudWatchRUM/Generated/AmazonCloudWatchRUMConfig.cs
@@ -34,7 +34,7 @@ namespace Amazon.CloudWatchRUM
     public partial class AmazonCloudWatchRUMConfig : ClientConfig
     {
         private static readonly string UserAgentString =
-            InternalSDKUtils.BuildUserAgentString("RUM", "3.7.300.85");
+            InternalSDKUtils.BuildUserAgentString("RUM", "4.0.0.0");
 
         private static readonly AmazonCloudWatchRUMEndpointResolver EndpointResolver =
             new AmazonCloudWatchRUMEndpointResolver();
diff --git a/sdk/src/Services/CloudWatchRUM/Properties/AssemblyInfo.cs b/sdk/src/Services/CloudWatchRUM/Properties/AssemblyInfo.cs
index ac18892d7737..16da459231e8 100644
--- a/sdk/src/Services/CloudWatchRUM/Properties/AssemblyInfo.cs
+++ b/sdk/src/Services/CloudWatchRUM/Properties/AssemblyInfo.cs
@@ -41,5 +41,9 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.300.85")]
\ No newline at end of file
+#if BCL
+[assembly: AssemblyVersion("4.0")]
+#else
+[assembly: AssemblyVersion("4.0.0.0")]
+#endif
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/src/Services/CodeArtifact/AWSSDK.CodeArtifact.NetFramework.csproj b/sdk/src/Services/CodeArtifact/AWSSDK.CodeArtifact.NetFramework.csproj
index f8af1b47ec36..822151ed20d8 100644
--- a/sdk/src/Services/CodeArtifact/AWSSDK.CodeArtifact.NetFramework.csproj
+++ b/sdk/src/Services/CodeArtifact/AWSSDK.CodeArtifact.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);BCL;AWS_ASYNC_API;CODE_ANALYSIS</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(RuleSetFileForBuild)' == 'false' Or '$(RuleSetFileForBuild)' == '' ">
diff --git a/sdk/src/Services/CodeArtifact/AWSSDK.CodeArtifact.NetStandard.csproj b/sdk/src/Services/CodeArtifact/AWSSDK.CodeArtifact.NetStandard.csproj
index 458031f7a467..7b47ec410ff2 100644
--- a/sdk/src/Services/CodeArtifact/AWSSDK.CodeArtifact.NetStandard.csproj
+++ b/sdk/src/Services/CodeArtifact/AWSSDK.CodeArtifact.NetStandard.csproj
@@ -22,6 +22,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <!-- Async Enumerable Compatibility -->
diff --git a/sdk/src/Services/CodeArtifact/Generated/AmazonCodeArtifactConfig.cs b/sdk/src/Services/CodeArtifact/Generated/AmazonCodeArtifactConfig.cs
index 496187049f69..06727dd55806 100644
--- a/sdk/src/Services/CodeArtifact/Generated/AmazonCodeArtifactConfig.cs
+++ b/sdk/src/Services/CodeArtifact/Generated/AmazonCodeArtifactConfig.cs
@@ -34,7 +34,7 @@ namespace Amazon.CodeArtifact
     public partial class AmazonCodeArtifactConfig : ClientConfig
     {
         private static readonly string UserAgentString =
-            InternalSDKUtils.BuildUserAgentString("codeartifact", "3.7.302.0");
+            InternalSDKUtils.BuildUserAgentString("codeartifact", "4.0.0.0");
 
         private static readonly AmazonCodeArtifactEndpointResolver EndpointResolver =
             new AmazonCodeArtifactEndpointResolver();
diff --git a/sdk/src/Services/CodeArtifact/Properties/AssemblyInfo.cs b/sdk/src/Services/CodeArtifact/Properties/AssemblyInfo.cs
index 5afd0107311f..d888d069dbe0 100644
--- a/sdk/src/Services/CodeArtifact/Properties/AssemblyInfo.cs
+++ b/sdk/src/Services/CodeArtifact/Properties/AssemblyInfo.cs
@@ -41,5 +41,9 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.302.0")]
\ No newline at end of file
+#if BCL
+[assembly: AssemblyVersion("4.0")]
+#else
+[assembly: AssemblyVersion("4.0.0.0")]
+#endif
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/src/Services/CodeBuild/AWSSDK.CodeBuild.NetFramework.csproj b/sdk/src/Services/CodeBuild/AWSSDK.CodeBuild.NetFramework.csproj
index b789c044dc39..55799326192e 100644
--- a/sdk/src/Services/CodeBuild/AWSSDK.CodeBuild.NetFramework.csproj
+++ b/sdk/src/Services/CodeBuild/AWSSDK.CodeBuild.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);BCL;AWS_ASYNC_API;CODE_ANALYSIS</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(RuleSetFileForBuild)' == 'false' Or '$(RuleSetFileForBuild)' == '' ">
diff --git a/sdk/src/Services/CodeBuild/AWSSDK.CodeBuild.NetStandard.csproj b/sdk/src/Services/CodeBuild/AWSSDK.CodeBuild.NetStandard.csproj
index 57d47ebffdb8..f1666e642e48 100644
--- a/sdk/src/Services/CodeBuild/AWSSDK.CodeBuild.NetStandard.csproj
+++ b/sdk/src/Services/CodeBuild/AWSSDK.CodeBuild.NetStandard.csproj
@@ -22,6 +22,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <!-- Async Enumerable Compatibility -->
diff --git a/sdk/src/Services/CodeBuild/Generated/AmazonCodeBuildConfig.cs b/sdk/src/Services/CodeBuild/Generated/AmazonCodeBuildConfig.cs
index 5fbafab72ba5..c20482c8a223 100644
--- a/sdk/src/Services/CodeBuild/Generated/AmazonCodeBuildConfig.cs
+++ b/sdk/src/Services/CodeBuild/Generated/AmazonCodeBuildConfig.cs
@@ -34,7 +34,7 @@ namespace Amazon.CodeBuild
     public partial class AmazonCodeBuildConfig : ClientConfig
     {
         private static readonly string UserAgentString =
-            InternalSDKUtils.BuildUserAgentString("CodeBuild", "3.7.306.12");
+            InternalSDKUtils.BuildUserAgentString("CodeBuild", "4.0.0.0");
 
         private static readonly AmazonCodeBuildEndpointResolver EndpointResolver =
             new AmazonCodeBuildEndpointResolver();
diff --git a/sdk/src/Services/CodeBuild/Properties/AssemblyInfo.cs b/sdk/src/Services/CodeBuild/Properties/AssemblyInfo.cs
index 72b10d8e94c8..d44e2a825d10 100644
--- a/sdk/src/Services/CodeBuild/Properties/AssemblyInfo.cs
+++ b/sdk/src/Services/CodeBuild/Properties/AssemblyInfo.cs
@@ -41,5 +41,9 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.306.12")]
\ No newline at end of file
+#if BCL
+[assembly: AssemblyVersion("4.0")]
+#else
+[assembly: AssemblyVersion("4.0.0.0")]
+#endif
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/src/Services/CodeCatalyst/AWSSDK.CodeCatalyst.NetFramework.csproj b/sdk/src/Services/CodeCatalyst/AWSSDK.CodeCatalyst.NetFramework.csproj
index 804016c6e1a8..0f4e98339cbe 100644
--- a/sdk/src/Services/CodeCatalyst/AWSSDK.CodeCatalyst.NetFramework.csproj
+++ b/sdk/src/Services/CodeCatalyst/AWSSDK.CodeCatalyst.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);BCL;AWS_ASYNC_API;CODE_ANALYSIS</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(RuleSetFileForBuild)' == 'false' Or '$(RuleSetFileForBuild)' == '' ">
diff --git a/sdk/src/Services/CodeCatalyst/AWSSDK.CodeCatalyst.NetStandard.csproj b/sdk/src/Services/CodeCatalyst/AWSSDK.CodeCatalyst.NetStandard.csproj
index defe585f341e..dc989f6ccf0c 100644
--- a/sdk/src/Services/CodeCatalyst/AWSSDK.CodeCatalyst.NetStandard.csproj
+++ b/sdk/src/Services/CodeCatalyst/AWSSDK.CodeCatalyst.NetStandard.csproj
@@ -22,6 +22,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <!-- Async Enumerable Compatibility -->
diff --git a/sdk/src/Services/CodeCatalyst/Generated/AmazonCodeCatalystConfig.cs b/sdk/src/Services/CodeCatalyst/Generated/AmazonCodeCatalystConfig.cs
index ba808bc004ac..4ae4136bec41 100644
--- a/sdk/src/Services/CodeCatalyst/Generated/AmazonCodeCatalystConfig.cs
+++ b/sdk/src/Services/CodeCatalyst/Generated/AmazonCodeCatalystConfig.cs
@@ -34,7 +34,7 @@ namespace Amazon.CodeCatalyst
     public partial class AmazonCodeCatalystConfig : ClientConfig
     {
         private static readonly string UserAgentString =
-            InternalSDKUtils.BuildUserAgentString("CodeCatalyst", "3.7.303.20");
+            InternalSDKUtils.BuildUserAgentString("CodeCatalyst", "4.0.0.0");
 
         private static readonly AmazonCodeCatalystEndpointResolver EndpointResolver =
             new AmazonCodeCatalystEndpointResolver();
diff --git a/sdk/src/Services/CodeCatalyst/Properties/AssemblyInfo.cs b/sdk/src/Services/CodeCatalyst/Properties/AssemblyInfo.cs
index 6ce0e31641aa..da00b5fddfc9 100644
--- a/sdk/src/Services/CodeCatalyst/Properties/AssemblyInfo.cs
+++ b/sdk/src/Services/CodeCatalyst/Properties/AssemblyInfo.cs
@@ -41,5 +41,9 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.303.20")]
\ No newline at end of file
+#if BCL
+[assembly: AssemblyVersion("4.0")]
+#else
+[assembly: AssemblyVersion("4.0.0.0")]
+#endif
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/src/Services/CodeCommit/AWSSDK.CodeCommit.NetFramework.csproj b/sdk/src/Services/CodeCommit/AWSSDK.CodeCommit.NetFramework.csproj
index bcff9861286f..817bb2339e68 100644
--- a/sdk/src/Services/CodeCommit/AWSSDK.CodeCommit.NetFramework.csproj
+++ b/sdk/src/Services/CodeCommit/AWSSDK.CodeCommit.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);BCL;AWS_ASYNC_API;CODE_ANALYSIS</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(RuleSetFileForBuild)' == 'false' Or '$(RuleSetFileForBuild)' == '' ">
diff --git a/sdk/src/Services/CodeCommit/AWSSDK.CodeCommit.NetStandard.csproj b/sdk/src/Services/CodeCommit/AWSSDK.CodeCommit.NetStandard.csproj
index 9576a3f26274..b555eae2ba68 100644
--- a/sdk/src/Services/CodeCommit/AWSSDK.CodeCommit.NetStandard.csproj
+++ b/sdk/src/Services/CodeCommit/AWSSDK.CodeCommit.NetStandard.csproj
@@ -22,6 +22,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <!-- Async Enumerable Compatibility -->
diff --git a/sdk/src/Services/CodeCommit/Generated/AmazonCodeCommitConfig.cs b/sdk/src/Services/CodeCommit/Generated/AmazonCodeCommitConfig.cs
index dce7a8441a02..e8094367a889 100644
--- a/sdk/src/Services/CodeCommit/Generated/AmazonCodeCommitConfig.cs
+++ b/sdk/src/Services/CodeCommit/Generated/AmazonCodeCommitConfig.cs
@@ -34,7 +34,7 @@ namespace Amazon.CodeCommit
     public partial class AmazonCodeCommitConfig : ClientConfig
     {
         private static readonly string UserAgentString =
-            InternalSDKUtils.BuildUserAgentString("CodeCommit", "3.7.301.60");
+            InternalSDKUtils.BuildUserAgentString("CodeCommit", "4.0.0.0");
 
         private static readonly AmazonCodeCommitEndpointResolver EndpointResolver =
             new AmazonCodeCommitEndpointResolver();
diff --git a/sdk/src/Services/CodeCommit/Properties/AssemblyInfo.cs b/sdk/src/Services/CodeCommit/Properties/AssemblyInfo.cs
index a3f02e8418c4..f622a4b815a4 100644
--- a/sdk/src/Services/CodeCommit/Properties/AssemblyInfo.cs
+++ b/sdk/src/Services/CodeCommit/Properties/AssemblyInfo.cs
@@ -41,5 +41,9 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.301.60")]
\ No newline at end of file
+#if BCL
+[assembly: AssemblyVersion("4.0")]
+#else
+[assembly: AssemblyVersion("4.0.0.0")]
+#endif
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/src/Services/CodeConnections/AWSSDK.CodeConnections.NetFramework.csproj b/sdk/src/Services/CodeConnections/AWSSDK.CodeConnections.NetFramework.csproj
index ffe52b424bfe..f864d13ba6fc 100644
--- a/sdk/src/Services/CodeConnections/AWSSDK.CodeConnections.NetFramework.csproj
+++ b/sdk/src/Services/CodeConnections/AWSSDK.CodeConnections.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);BCL;AWS_ASYNC_API;CODE_ANALYSIS</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(RuleSetFileForBuild)' == 'false' Or '$(RuleSetFileForBuild)' == '' ">
diff --git a/sdk/src/Services/CodeConnections/AWSSDK.CodeConnections.NetStandard.csproj b/sdk/src/Services/CodeConnections/AWSSDK.CodeConnections.NetStandard.csproj
index 94479b68d400..f9f2fbb65c8a 100644
--- a/sdk/src/Services/CodeConnections/AWSSDK.CodeConnections.NetStandard.csproj
+++ b/sdk/src/Services/CodeConnections/AWSSDK.CodeConnections.NetStandard.csproj
@@ -22,6 +22,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <!-- Async Enumerable Compatibility -->
diff --git a/sdk/src/Services/CodeConnections/Generated/AmazonCodeConnectionsConfig.cs b/sdk/src/Services/CodeConnections/Generated/AmazonCodeConnectionsConfig.cs
index 1cf276c86d33..1fc3562e5a49 100644
--- a/sdk/src/Services/CodeConnections/Generated/AmazonCodeConnectionsConfig.cs
+++ b/sdk/src/Services/CodeConnections/Generated/AmazonCodeConnectionsConfig.cs
@@ -34,7 +34,7 @@ namespace Amazon.CodeConnections
     public partial class AmazonCodeConnectionsConfig : ClientConfig
     {
         private static readonly string UserAgentString =
-            InternalSDKUtils.BuildUserAgentString("CodeConnections", "3.7.300.19");
+            InternalSDKUtils.BuildUserAgentString("CodeConnections", "4.0.0.0");
 
         private static readonly AmazonCodeConnectionsEndpointResolver EndpointResolver =
             new AmazonCodeConnectionsEndpointResolver();
diff --git a/sdk/src/Services/CodeConnections/Properties/AssemblyInfo.cs b/sdk/src/Services/CodeConnections/Properties/AssemblyInfo.cs
index 284845838c00..1e74840cb7dd 100644
--- a/sdk/src/Services/CodeConnections/Properties/AssemblyInfo.cs
+++ b/sdk/src/Services/CodeConnections/Properties/AssemblyInfo.cs
@@ -41,5 +41,9 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.300.19")]
\ No newline at end of file
+#if BCL
+[assembly: AssemblyVersion("4.0")]
+#else
+[assembly: AssemblyVersion("4.0.0.0")]
+#endif
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/src/Services/CodeDeploy/AWSSDK.CodeDeploy.NetFramework.csproj b/sdk/src/Services/CodeDeploy/AWSSDK.CodeDeploy.NetFramework.csproj
index a64e9ef85d51..f99708a99a6d 100644
--- a/sdk/src/Services/CodeDeploy/AWSSDK.CodeDeploy.NetFramework.csproj
+++ b/sdk/src/Services/CodeDeploy/AWSSDK.CodeDeploy.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);BCL;AWS_ASYNC_API;CODE_ANALYSIS</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(RuleSetFileForBuild)' == 'false' Or '$(RuleSetFileForBuild)' == '' ">
diff --git a/sdk/src/Services/CodeDeploy/AWSSDK.CodeDeploy.NetStandard.csproj b/sdk/src/Services/CodeDeploy/AWSSDK.CodeDeploy.NetStandard.csproj
index ddf419e955d1..898efefe2ecc 100644
--- a/sdk/src/Services/CodeDeploy/AWSSDK.CodeDeploy.NetStandard.csproj
+++ b/sdk/src/Services/CodeDeploy/AWSSDK.CodeDeploy.NetStandard.csproj
@@ -22,6 +22,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <!-- Async Enumerable Compatibility -->
diff --git a/sdk/src/Services/CodeDeploy/Generated/AmazonCodeDeployConfig.cs b/sdk/src/Services/CodeDeploy/Generated/AmazonCodeDeployConfig.cs
index 29d87110a371..2b683d7658f8 100644
--- a/sdk/src/Services/CodeDeploy/Generated/AmazonCodeDeployConfig.cs
+++ b/sdk/src/Services/CodeDeploy/Generated/AmazonCodeDeployConfig.cs
@@ -34,7 +34,7 @@ namespace Amazon.CodeDeploy
     public partial class AmazonCodeDeployConfig : ClientConfig
     {
         private static readonly string UserAgentString =
-            InternalSDKUtils.BuildUserAgentString("CodeDeploy", "3.7.301.68");
+            InternalSDKUtils.BuildUserAgentString("CodeDeploy", "4.0.0.0");
 
         private static readonly AmazonCodeDeployEndpointResolver EndpointResolver =
             new AmazonCodeDeployEndpointResolver();
diff --git a/sdk/src/Services/CodeDeploy/Properties/AssemblyInfo.cs b/sdk/src/Services/CodeDeploy/Properties/AssemblyInfo.cs
index a44d5ce47a96..61c179b34e9b 100644
--- a/sdk/src/Services/CodeDeploy/Properties/AssemblyInfo.cs
+++ b/sdk/src/Services/CodeDeploy/Properties/AssemblyInfo.cs
@@ -41,5 +41,9 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.301.68")]
\ No newline at end of file
+#if BCL
+[assembly: AssemblyVersion("4.0")]
+#else
+[assembly: AssemblyVersion("4.0.0.0")]
+#endif
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/src/Services/CodeGuruProfiler/AWSSDK.CodeGuruProfiler.NetFramework.csproj b/sdk/src/Services/CodeGuruProfiler/AWSSDK.CodeGuruProfiler.NetFramework.csproj
index 6e84157eea3d..33374ff4a6f9 100644
--- a/sdk/src/Services/CodeGuruProfiler/AWSSDK.CodeGuruProfiler.NetFramework.csproj
+++ b/sdk/src/Services/CodeGuruProfiler/AWSSDK.CodeGuruProfiler.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);BCL;AWS_ASYNC_API;CODE_ANALYSIS</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(RuleSetFileForBuild)' == 'false' Or '$(RuleSetFileForBuild)' == '' ">
diff --git a/sdk/src/Services/CodeGuruProfiler/AWSSDK.CodeGuruProfiler.NetStandard.csproj b/sdk/src/Services/CodeGuruProfiler/AWSSDK.CodeGuruProfiler.NetStandard.csproj
index 521728c33993..0e26fbb86b14 100644
--- a/sdk/src/Services/CodeGuruProfiler/AWSSDK.CodeGuruProfiler.NetStandard.csproj
+++ b/sdk/src/Services/CodeGuruProfiler/AWSSDK.CodeGuruProfiler.NetStandard.csproj
@@ -22,6 +22,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <!-- Async Enumerable Compatibility -->
diff --git a/sdk/src/Services/CodeGuruProfiler/Generated/AmazonCodeGuruProfilerConfig.cs b/sdk/src/Services/CodeGuruProfiler/Generated/AmazonCodeGuruProfilerConfig.cs
index c9f3370b3ca3..497c500f547d 100644
--- a/sdk/src/Services/CodeGuruProfiler/Generated/AmazonCodeGuruProfilerConfig.cs
+++ b/sdk/src/Services/CodeGuruProfiler/Generated/AmazonCodeGuruProfilerConfig.cs
@@ -34,7 +34,7 @@ namespace Amazon.CodeGuruProfiler
     public partial class AmazonCodeGuruProfilerConfig : ClientConfig
     {
         private static readonly string UserAgentString =
-            InternalSDKUtils.BuildUserAgentString("CodeGuruProfiler", "3.7.300.84");
+            InternalSDKUtils.BuildUserAgentString("CodeGuruProfiler", "4.0.0.0");
 
         private static readonly AmazonCodeGuruProfilerEndpointResolver EndpointResolver =
             new AmazonCodeGuruProfilerEndpointResolver();
diff --git a/sdk/src/Services/CodeGuruProfiler/Properties/AssemblyInfo.cs b/sdk/src/Services/CodeGuruProfiler/Properties/AssemblyInfo.cs
index 26cb6608b5ba..b5899e9e7a36 100644
--- a/sdk/src/Services/CodeGuruProfiler/Properties/AssemblyInfo.cs
+++ b/sdk/src/Services/CodeGuruProfiler/Properties/AssemblyInfo.cs
@@ -41,5 +41,9 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.300.84")]
\ No newline at end of file
+#if BCL
+[assembly: AssemblyVersion("4.0")]
+#else
+[assembly: AssemblyVersion("4.0.0.0")]
+#endif
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/src/Services/CodeGuruReviewer/AWSSDK.CodeGuruReviewer.NetFramework.csproj b/sdk/src/Services/CodeGuruReviewer/AWSSDK.CodeGuruReviewer.NetFramework.csproj
index 6922ce5bff61..df7e644ea51c 100644
--- a/sdk/src/Services/CodeGuruReviewer/AWSSDK.CodeGuruReviewer.NetFramework.csproj
+++ b/sdk/src/Services/CodeGuruReviewer/AWSSDK.CodeGuruReviewer.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);BCL;AWS_ASYNC_API;CODE_ANALYSIS</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(RuleSetFileForBuild)' == 'false' Or '$(RuleSetFileForBuild)' == '' ">
diff --git a/sdk/src/Services/CodeGuruReviewer/AWSSDK.CodeGuruReviewer.NetStandard.csproj b/sdk/src/Services/CodeGuruReviewer/AWSSDK.CodeGuruReviewer.NetStandard.csproj
index c5024cfebc91..a0b5e1d240ba 100644
--- a/sdk/src/Services/CodeGuruReviewer/AWSSDK.CodeGuruReviewer.NetStandard.csproj
+++ b/sdk/src/Services/CodeGuruReviewer/AWSSDK.CodeGuruReviewer.NetStandard.csproj
@@ -22,6 +22,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <!-- Async Enumerable Compatibility -->
diff --git a/sdk/src/Services/CodeGuruReviewer/Generated/AmazonCodeGuruReviewerConfig.cs b/sdk/src/Services/CodeGuruReviewer/Generated/AmazonCodeGuruReviewerConfig.cs
index 8504ec85b722..59850a38c468 100644
--- a/sdk/src/Services/CodeGuruReviewer/Generated/AmazonCodeGuruReviewerConfig.cs
+++ b/sdk/src/Services/CodeGuruReviewer/Generated/AmazonCodeGuruReviewerConfig.cs
@@ -34,7 +34,7 @@ namespace Amazon.CodeGuruReviewer
     public partial class AmazonCodeGuruReviewerConfig : ClientConfig
     {
         private static readonly string UserAgentString =
-            InternalSDKUtils.BuildUserAgentString("CodeGuru Reviewer", "3.7.300.84");
+            InternalSDKUtils.BuildUserAgentString("CodeGuru Reviewer", "4.0.0.0");
 
         private static readonly AmazonCodeGuruReviewerEndpointResolver EndpointResolver =
             new AmazonCodeGuruReviewerEndpointResolver();
diff --git a/sdk/src/Services/CodeGuruReviewer/Properties/AssemblyInfo.cs b/sdk/src/Services/CodeGuruReviewer/Properties/AssemblyInfo.cs
index e946b936a7c3..44d7c3db33c3 100644
--- a/sdk/src/Services/CodeGuruReviewer/Properties/AssemblyInfo.cs
+++ b/sdk/src/Services/CodeGuruReviewer/Properties/AssemblyInfo.cs
@@ -41,5 +41,9 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.300.84")]
\ No newline at end of file
+#if BCL
+[assembly: AssemblyVersion("4.0")]
+#else
+[assembly: AssemblyVersion("4.0.0.0")]
+#endif
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/src/Services/CodeGuruSecurity/AWSSDK.CodeGuruSecurity.NetFramework.csproj b/sdk/src/Services/CodeGuruSecurity/AWSSDK.CodeGuruSecurity.NetFramework.csproj
index ebea6fa65a29..6341c6e8abe0 100644
--- a/sdk/src/Services/CodeGuruSecurity/AWSSDK.CodeGuruSecurity.NetFramework.csproj
+++ b/sdk/src/Services/CodeGuruSecurity/AWSSDK.CodeGuruSecurity.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);BCL;AWS_ASYNC_API;CODE_ANALYSIS</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(RuleSetFileForBuild)' == 'false' Or '$(RuleSetFileForBuild)' == '' ">
diff --git a/sdk/src/Services/CodeGuruSecurity/AWSSDK.CodeGuruSecurity.NetStandard.csproj b/sdk/src/Services/CodeGuruSecurity/AWSSDK.CodeGuruSecurity.NetStandard.csproj
index 42b4ccf83a62..7a7d350f2ee9 100644
--- a/sdk/src/Services/CodeGuruSecurity/AWSSDK.CodeGuruSecurity.NetStandard.csproj
+++ b/sdk/src/Services/CodeGuruSecurity/AWSSDK.CodeGuruSecurity.NetStandard.csproj
@@ -22,6 +22,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <!-- Async Enumerable Compatibility -->
diff --git a/sdk/src/Services/CodeGuruSecurity/Generated/AmazonCodeGuruSecurityConfig.cs b/sdk/src/Services/CodeGuruSecurity/Generated/AmazonCodeGuruSecurityConfig.cs
index adc43d050d87..100ca3a8e27d 100644
--- a/sdk/src/Services/CodeGuruSecurity/Generated/AmazonCodeGuruSecurityConfig.cs
+++ b/sdk/src/Services/CodeGuruSecurity/Generated/AmazonCodeGuruSecurityConfig.cs
@@ -34,7 +34,7 @@ namespace Amazon.CodeGuruSecurity
     public partial class AmazonCodeGuruSecurityConfig : ClientConfig
     {
         private static readonly string UserAgentString =
-            InternalSDKUtils.BuildUserAgentString("CodeGuru Security", "3.7.300.84");
+            InternalSDKUtils.BuildUserAgentString("CodeGuru Security", "4.0.0.0");
 
         private static readonly AmazonCodeGuruSecurityEndpointResolver EndpointResolver =
             new AmazonCodeGuruSecurityEndpointResolver();
diff --git a/sdk/src/Services/CodeGuruSecurity/Properties/AssemblyInfo.cs b/sdk/src/Services/CodeGuruSecurity/Properties/AssemblyInfo.cs
index 1037b9e7a6b3..dd8dfe4a87e8 100644
--- a/sdk/src/Services/CodeGuruSecurity/Properties/AssemblyInfo.cs
+++ b/sdk/src/Services/CodeGuruSecurity/Properties/AssemblyInfo.cs
@@ -41,5 +41,9 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.300.84")]
\ No newline at end of file
+#if BCL
+[assembly: AssemblyVersion("4.0")]
+#else
+[assembly: AssemblyVersion("4.0.0.0")]
+#endif
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/src/Services/CodePipeline/AWSSDK.CodePipeline.NetFramework.csproj b/sdk/src/Services/CodePipeline/AWSSDK.CodePipeline.NetFramework.csproj
index 0b039e6643c2..fa04c342dc36 100644
--- a/sdk/src/Services/CodePipeline/AWSSDK.CodePipeline.NetFramework.csproj
+++ b/sdk/src/Services/CodePipeline/AWSSDK.CodePipeline.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);BCL;AWS_ASYNC_API;CODE_ANALYSIS</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(RuleSetFileForBuild)' == 'false' Or '$(RuleSetFileForBuild)' == '' ">
diff --git a/sdk/src/Services/CodePipeline/AWSSDK.CodePipeline.NetStandard.csproj b/sdk/src/Services/CodePipeline/AWSSDK.CodePipeline.NetStandard.csproj
index 73f15dfea9a1..35184d1491d1 100644
--- a/sdk/src/Services/CodePipeline/AWSSDK.CodePipeline.NetStandard.csproj
+++ b/sdk/src/Services/CodePipeline/AWSSDK.CodePipeline.NetStandard.csproj
@@ -22,6 +22,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <!-- Async Enumerable Compatibility -->
diff --git a/sdk/src/Services/CodePipeline/Generated/AmazonCodePipelineConfig.cs b/sdk/src/Services/CodePipeline/Generated/AmazonCodePipelineConfig.cs
index 01aa1eddf2c6..be7e670c2cd6 100644
--- a/sdk/src/Services/CodePipeline/Generated/AmazonCodePipelineConfig.cs
+++ b/sdk/src/Services/CodePipeline/Generated/AmazonCodePipelineConfig.cs
@@ -34,7 +34,7 @@ namespace Amazon.CodePipeline
     public partial class AmazonCodePipelineConfig : ClientConfig
     {
         private static readonly string UserAgentString =
-            InternalSDKUtils.BuildUserAgentString("CodePipeline", "3.7.304.1");
+            InternalSDKUtils.BuildUserAgentString("CodePipeline", "4.0.0.0");
 
         private static readonly AmazonCodePipelineEndpointResolver EndpointResolver =
             new AmazonCodePipelineEndpointResolver();
diff --git a/sdk/src/Services/CodePipeline/Properties/AssemblyInfo.cs b/sdk/src/Services/CodePipeline/Properties/AssemblyInfo.cs
index 164b8bfcb366..b8fd9702ab1c 100644
--- a/sdk/src/Services/CodePipeline/Properties/AssemblyInfo.cs
+++ b/sdk/src/Services/CodePipeline/Properties/AssemblyInfo.cs
@@ -41,5 +41,9 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.304.1")]
\ No newline at end of file
+#if BCL
+[assembly: AssemblyVersion("4.0")]
+#else
+[assembly: AssemblyVersion("4.0.0.0")]
+#endif
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/src/Services/CodeStar/AWSSDK.CodeStar.NetFramework.csproj b/sdk/src/Services/CodeStar/AWSSDK.CodeStar.NetFramework.csproj
index 6370b0498718..fb972456ddd8 100644
--- a/sdk/src/Services/CodeStar/AWSSDK.CodeStar.NetFramework.csproj
+++ b/sdk/src/Services/CodeStar/AWSSDK.CodeStar.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);BCL;AWS_ASYNC_API;CODE_ANALYSIS</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(RuleSetFileForBuild)' == 'false' Or '$(RuleSetFileForBuild)' == '' ">
diff --git a/sdk/src/Services/CodeStar/AWSSDK.CodeStar.NetStandard.csproj b/sdk/src/Services/CodeStar/AWSSDK.CodeStar.NetStandard.csproj
index 1357aa55f1aa..6579f3bdf1c6 100644
--- a/sdk/src/Services/CodeStar/AWSSDK.CodeStar.NetStandard.csproj
+++ b/sdk/src/Services/CodeStar/AWSSDK.CodeStar.NetStandard.csproj
@@ -22,6 +22,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <!-- Async Enumerable Compatibility -->
diff --git a/sdk/src/Services/CodeStar/Generated/AmazonCodeStarConfig.cs b/sdk/src/Services/CodeStar/Generated/AmazonCodeStarConfig.cs
index fce86f235a9f..210f453478b1 100644
--- a/sdk/src/Services/CodeStar/Generated/AmazonCodeStarConfig.cs
+++ b/sdk/src/Services/CodeStar/Generated/AmazonCodeStarConfig.cs
@@ -34,7 +34,7 @@ namespace Amazon.CodeStar
     public partial class AmazonCodeStarConfig : ClientConfig
     {
         private static readonly string UserAgentString =
-            InternalSDKUtils.BuildUserAgentString("CodeStar", "3.7.300.84");
+            InternalSDKUtils.BuildUserAgentString("CodeStar", "4.0.0.0");
 
         private static readonly AmazonCodeStarEndpointResolver EndpointResolver =
             new AmazonCodeStarEndpointResolver();
diff --git a/sdk/src/Services/CodeStar/Properties/AssemblyInfo.cs b/sdk/src/Services/CodeStar/Properties/AssemblyInfo.cs
index 31c3b4950be7..5eb745e74fdf 100644
--- a/sdk/src/Services/CodeStar/Properties/AssemblyInfo.cs
+++ b/sdk/src/Services/CodeStar/Properties/AssemblyInfo.cs
@@ -41,5 +41,9 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.300.84")]
\ No newline at end of file
+#if BCL
+[assembly: AssemblyVersion("4.0")]
+#else
+[assembly: AssemblyVersion("4.0.0.0")]
+#endif
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/src/Services/CodeStarNotifications/AWSSDK.CodeStarNotifications.NetFramework.csproj b/sdk/src/Services/CodeStarNotifications/AWSSDK.CodeStarNotifications.NetFramework.csproj
index 235b493a6d89..1b4916283f1a 100644
--- a/sdk/src/Services/CodeStarNotifications/AWSSDK.CodeStarNotifications.NetFramework.csproj
+++ b/sdk/src/Services/CodeStarNotifications/AWSSDK.CodeStarNotifications.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);BCL;AWS_ASYNC_API;CODE_ANALYSIS</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(RuleSetFileForBuild)' == 'false' Or '$(RuleSetFileForBuild)' == '' ">
diff --git a/sdk/src/Services/CodeStarNotifications/AWSSDK.CodeStarNotifications.NetStandard.csproj b/sdk/src/Services/CodeStarNotifications/AWSSDK.CodeStarNotifications.NetStandard.csproj
index e4b482aedcb4..a93b36e623e4 100644
--- a/sdk/src/Services/CodeStarNotifications/AWSSDK.CodeStarNotifications.NetStandard.csproj
+++ b/sdk/src/Services/CodeStarNotifications/AWSSDK.CodeStarNotifications.NetStandard.csproj
@@ -22,6 +22,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <!-- Async Enumerable Compatibility -->
diff --git a/sdk/src/Services/CodeStarNotifications/Generated/AmazonCodeStarNotificationsConfig.cs b/sdk/src/Services/CodeStarNotifications/Generated/AmazonCodeStarNotificationsConfig.cs
index bc8fcb2936ae..95ffdca08537 100644
--- a/sdk/src/Services/CodeStarNotifications/Generated/AmazonCodeStarNotificationsConfig.cs
+++ b/sdk/src/Services/CodeStarNotifications/Generated/AmazonCodeStarNotificationsConfig.cs
@@ -34,7 +34,7 @@ namespace Amazon.CodeStarNotifications
     public partial class AmazonCodeStarNotificationsConfig : ClientConfig
     {
         private static readonly string UserAgentString =
-            InternalSDKUtils.BuildUserAgentString("codestar notifications", "3.7.300.84");
+            InternalSDKUtils.BuildUserAgentString("codestar notifications", "4.0.0.0");
 
         private static readonly AmazonCodeStarNotificationsEndpointResolver EndpointResolver =
             new AmazonCodeStarNotificationsEndpointResolver();
diff --git a/sdk/src/Services/CodeStarNotifications/Properties/AssemblyInfo.cs b/sdk/src/Services/CodeStarNotifications/Properties/AssemblyInfo.cs
index 5c6240d761de..2b432f815085 100644
--- a/sdk/src/Services/CodeStarNotifications/Properties/AssemblyInfo.cs
+++ b/sdk/src/Services/CodeStarNotifications/Properties/AssemblyInfo.cs
@@ -41,5 +41,9 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.300.84")]
\ No newline at end of file
+#if BCL
+[assembly: AssemblyVersion("4.0")]
+#else
+[assembly: AssemblyVersion("4.0.0.0")]
+#endif
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/src/Services/CodeStarconnections/AWSSDK.CodeStarconnections.NetFramework.csproj b/sdk/src/Services/CodeStarconnections/AWSSDK.CodeStarconnections.NetFramework.csproj
index b0674cecf471..d33587d1106b 100644
--- a/sdk/src/Services/CodeStarconnections/AWSSDK.CodeStarconnections.NetFramework.csproj
+++ b/sdk/src/Services/CodeStarconnections/AWSSDK.CodeStarconnections.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);BCL;AWS_ASYNC_API;CODE_ANALYSIS</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(RuleSetFileForBuild)' == 'false' Or '$(RuleSetFileForBuild)' == '' ">
diff --git a/sdk/src/Services/CodeStarconnections/AWSSDK.CodeStarconnections.NetStandard.csproj b/sdk/src/Services/CodeStarconnections/AWSSDK.CodeStarconnections.NetStandard.csproj
index 3ff461d7de3d..98ab311dae8c 100644
--- a/sdk/src/Services/CodeStarconnections/AWSSDK.CodeStarconnections.NetStandard.csproj
+++ b/sdk/src/Services/CodeStarconnections/AWSSDK.CodeStarconnections.NetStandard.csproj
@@ -22,6 +22,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <!-- Async Enumerable Compatibility -->
diff --git a/sdk/src/Services/CodeStarconnections/Generated/AmazonCodeStarconnectionsConfig.cs b/sdk/src/Services/CodeStarconnections/Generated/AmazonCodeStarconnectionsConfig.cs
index 3e7d976bf9f4..0b3cf5389909 100644
--- a/sdk/src/Services/CodeStarconnections/Generated/AmazonCodeStarconnectionsConfig.cs
+++ b/sdk/src/Services/CodeStarconnections/Generated/AmazonCodeStarconnectionsConfig.cs
@@ -34,7 +34,7 @@ namespace Amazon.CodeStarconnections
     public partial class AmazonCodeStarconnectionsConfig : ClientConfig
     {
         private static readonly string UserAgentString =
-            InternalSDKUtils.BuildUserAgentString("CodeStar connections", "3.7.305.29");
+            InternalSDKUtils.BuildUserAgentString("CodeStar connections", "4.0.0.0");
 
         private static readonly AmazonCodeStarconnectionsEndpointResolver EndpointResolver =
             new AmazonCodeStarconnectionsEndpointResolver();
diff --git a/sdk/src/Services/CodeStarconnections/Properties/AssemblyInfo.cs b/sdk/src/Services/CodeStarconnections/Properties/AssemblyInfo.cs
index cf421edea713..6ac926af8656 100644
--- a/sdk/src/Services/CodeStarconnections/Properties/AssemblyInfo.cs
+++ b/sdk/src/Services/CodeStarconnections/Properties/AssemblyInfo.cs
@@ -41,5 +41,9 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.305.29")]
\ No newline at end of file
+#if BCL
+[assembly: AssemblyVersion("4.0")]
+#else
+[assembly: AssemblyVersion("4.0.0.0")]
+#endif
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/src/Services/CognitoIdentity/AWSSDK.CognitoIdentity.NetFramework.csproj b/sdk/src/Services/CognitoIdentity/AWSSDK.CognitoIdentity.NetFramework.csproj
index 3a1cccedf203..77b2f4983b01 100644
--- a/sdk/src/Services/CognitoIdentity/AWSSDK.CognitoIdentity.NetFramework.csproj
+++ b/sdk/src/Services/CognitoIdentity/AWSSDK.CognitoIdentity.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);BCL;AWS_ASYNC_API;CODE_ANALYSIS</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(RuleSetFileForBuild)' == 'false' Or '$(RuleSetFileForBuild)' == '' ">
diff --git a/sdk/src/Services/CognitoIdentity/AWSSDK.CognitoIdentity.NetStandard.csproj b/sdk/src/Services/CognitoIdentity/AWSSDK.CognitoIdentity.NetStandard.csproj
index 3e4d2e63d74a..144441081ac4 100644
--- a/sdk/src/Services/CognitoIdentity/AWSSDK.CognitoIdentity.NetStandard.csproj
+++ b/sdk/src/Services/CognitoIdentity/AWSSDK.CognitoIdentity.NetStandard.csproj
@@ -22,6 +22,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <!-- Async Enumerable Compatibility -->
diff --git a/sdk/src/Services/CognitoIdentity/Generated/AmazonCognitoIdentityConfig.cs b/sdk/src/Services/CognitoIdentity/Generated/AmazonCognitoIdentityConfig.cs
index 3c49aca4afcd..1d5b867ad1b5 100644
--- a/sdk/src/Services/CognitoIdentity/Generated/AmazonCognitoIdentityConfig.cs
+++ b/sdk/src/Services/CognitoIdentity/Generated/AmazonCognitoIdentityConfig.cs
@@ -34,7 +34,7 @@ namespace Amazon.CognitoIdentity
     public partial class AmazonCognitoIdentityConfig : ClientConfig
     {
         private static readonly string UserAgentString =
-            InternalSDKUtils.BuildUserAgentString("Cognito Identity", "3.7.300.84");
+            InternalSDKUtils.BuildUserAgentString("Cognito Identity", "4.0.0.0");
 
         private static readonly AmazonCognitoIdentityEndpointResolver EndpointResolver =
             new AmazonCognitoIdentityEndpointResolver();
diff --git a/sdk/src/Services/CognitoIdentity/Properties/AssemblyInfo.cs b/sdk/src/Services/CognitoIdentity/Properties/AssemblyInfo.cs
index 8837f5b9c83c..c9f38ee4f331 100644
--- a/sdk/src/Services/CognitoIdentity/Properties/AssemblyInfo.cs
+++ b/sdk/src/Services/CognitoIdentity/Properties/AssemblyInfo.cs
@@ -41,5 +41,9 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.300.84")]
\ No newline at end of file
+#if BCL
+[assembly: AssemblyVersion("4.0")]
+#else
+[assembly: AssemblyVersion("4.0.0.0")]
+#endif
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/src/Services/CognitoIdentityProvider/AWSSDK.CognitoIdentityProvider.NetFramework.csproj b/sdk/src/Services/CognitoIdentityProvider/AWSSDK.CognitoIdentityProvider.NetFramework.csproj
index d2f9d4a64a84..361c74e2251b 100644
--- a/sdk/src/Services/CognitoIdentityProvider/AWSSDK.CognitoIdentityProvider.NetFramework.csproj
+++ b/sdk/src/Services/CognitoIdentityProvider/AWSSDK.CognitoIdentityProvider.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);BCL;AWS_ASYNC_API;CODE_ANALYSIS</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(RuleSetFileForBuild)' == 'false' Or '$(RuleSetFileForBuild)' == '' ">
diff --git a/sdk/src/Services/CognitoIdentityProvider/AWSSDK.CognitoIdentityProvider.NetStandard.csproj b/sdk/src/Services/CognitoIdentityProvider/AWSSDK.CognitoIdentityProvider.NetStandard.csproj
index 1978700dda20..f43817cf0f83 100644
--- a/sdk/src/Services/CognitoIdentityProvider/AWSSDK.CognitoIdentityProvider.NetStandard.csproj
+++ b/sdk/src/Services/CognitoIdentityProvider/AWSSDK.CognitoIdentityProvider.NetStandard.csproj
@@ -22,6 +22,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <!-- Async Enumerable Compatibility -->
diff --git a/sdk/src/Services/CognitoIdentityProvider/Generated/AmazonCognitoIdentityProviderConfig.cs b/sdk/src/Services/CognitoIdentityProvider/Generated/AmazonCognitoIdentityProviderConfig.cs
index e37e4f3c8c59..623e92e0f344 100644
--- a/sdk/src/Services/CognitoIdentityProvider/Generated/AmazonCognitoIdentityProviderConfig.cs
+++ b/sdk/src/Services/CognitoIdentityProvider/Generated/AmazonCognitoIdentityProviderConfig.cs
@@ -34,7 +34,7 @@ namespace Amazon.CognitoIdentityProvider
     public partial class AmazonCognitoIdentityProviderConfig : ClientConfig
     {
         private static readonly string UserAgentString =
-            InternalSDKUtils.BuildUserAgentString("Cognito Identity Provider", "3.7.304.1");
+            InternalSDKUtils.BuildUserAgentString("Cognito Identity Provider", "4.0.0.0");
 
         private static readonly AmazonCognitoIdentityProviderEndpointResolver EndpointResolver =
             new AmazonCognitoIdentityProviderEndpointResolver();
diff --git a/sdk/src/Services/CognitoIdentityProvider/Properties/AssemblyInfo.cs b/sdk/src/Services/CognitoIdentityProvider/Properties/AssemblyInfo.cs
index affc61d005bd..ec85b56d8fa6 100644
--- a/sdk/src/Services/CognitoIdentityProvider/Properties/AssemblyInfo.cs
+++ b/sdk/src/Services/CognitoIdentityProvider/Properties/AssemblyInfo.cs
@@ -41,5 +41,9 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.304.1")]
\ No newline at end of file
+#if BCL
+[assembly: AssemblyVersion("4.0")]
+#else
+[assembly: AssemblyVersion("4.0.0.0")]
+#endif
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/src/Services/CognitoSync/AWSSDK.CognitoSync.NetFramework.csproj b/sdk/src/Services/CognitoSync/AWSSDK.CognitoSync.NetFramework.csproj
index ae3d9daba438..0ed5ac801088 100644
--- a/sdk/src/Services/CognitoSync/AWSSDK.CognitoSync.NetFramework.csproj
+++ b/sdk/src/Services/CognitoSync/AWSSDK.CognitoSync.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);BCL;AWS_ASYNC_API;CODE_ANALYSIS</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(RuleSetFileForBuild)' == 'false' Or '$(RuleSetFileForBuild)' == '' ">
diff --git a/sdk/src/Services/CognitoSync/AWSSDK.CognitoSync.NetStandard.csproj b/sdk/src/Services/CognitoSync/AWSSDK.CognitoSync.NetStandard.csproj
index c08968f3af3c..ad24aac5a0ab 100644
--- a/sdk/src/Services/CognitoSync/AWSSDK.CognitoSync.NetStandard.csproj
+++ b/sdk/src/Services/CognitoSync/AWSSDK.CognitoSync.NetStandard.csproj
@@ -22,6 +22,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <!-- Async Enumerable Compatibility -->
diff --git a/sdk/src/Services/CognitoSync/Generated/AmazonCognitoSyncConfig.cs b/sdk/src/Services/CognitoSync/Generated/AmazonCognitoSyncConfig.cs
index d8fbfec8c4b6..87e499090920 100644
--- a/sdk/src/Services/CognitoSync/Generated/AmazonCognitoSyncConfig.cs
+++ b/sdk/src/Services/CognitoSync/Generated/AmazonCognitoSyncConfig.cs
@@ -34,7 +34,7 @@ namespace Amazon.CognitoSync
     public partial class AmazonCognitoSyncConfig : ClientConfig
     {
         private static readonly string UserAgentString =
-            InternalSDKUtils.BuildUserAgentString("Cognito Sync", "3.7.300.84");
+            InternalSDKUtils.BuildUserAgentString("Cognito Sync", "4.0.0.0");
 
         private static readonly AmazonCognitoSyncEndpointResolver EndpointResolver =
             new AmazonCognitoSyncEndpointResolver();
diff --git a/sdk/src/Services/CognitoSync/Properties/AssemblyInfo.cs b/sdk/src/Services/CognitoSync/Properties/AssemblyInfo.cs
index ba491300230c..daf602031213 100644
--- a/sdk/src/Services/CognitoSync/Properties/AssemblyInfo.cs
+++ b/sdk/src/Services/CognitoSync/Properties/AssemblyInfo.cs
@@ -41,5 +41,9 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.300.84")]
\ No newline at end of file
+#if BCL
+[assembly: AssemblyVersion("4.0")]
+#else
+[assembly: AssemblyVersion("4.0.0.0")]
+#endif
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/src/Services/Comprehend/AWSSDK.Comprehend.NetFramework.csproj b/sdk/src/Services/Comprehend/AWSSDK.Comprehend.NetFramework.csproj
index f18a5bc5fb6a..100b870fef0a 100644
--- a/sdk/src/Services/Comprehend/AWSSDK.Comprehend.NetFramework.csproj
+++ b/sdk/src/Services/Comprehend/AWSSDK.Comprehend.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);BCL;AWS_ASYNC_API;CODE_ANALYSIS</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(RuleSetFileForBuild)' == 'false' Or '$(RuleSetFileForBuild)' == '' ">
diff --git a/sdk/src/Services/Comprehend/AWSSDK.Comprehend.NetStandard.csproj b/sdk/src/Services/Comprehend/AWSSDK.Comprehend.NetStandard.csproj
index 5342feb92dd8..33ab4fd4835f 100644
--- a/sdk/src/Services/Comprehend/AWSSDK.Comprehend.NetStandard.csproj
+++ b/sdk/src/Services/Comprehend/AWSSDK.Comprehend.NetStandard.csproj
@@ -22,6 +22,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <!-- Async Enumerable Compatibility -->
diff --git a/sdk/src/Services/Comprehend/Generated/AmazonComprehendConfig.cs b/sdk/src/Services/Comprehend/Generated/AmazonComprehendConfig.cs
index 5583d47e4662..22a60c8569af 100644
--- a/sdk/src/Services/Comprehend/Generated/AmazonComprehendConfig.cs
+++ b/sdk/src/Services/Comprehend/Generated/AmazonComprehendConfig.cs
@@ -34,7 +34,7 @@ namespace Amazon.Comprehend
     public partial class AmazonComprehendConfig : ClientConfig
     {
         private static readonly string UserAgentString =
-            InternalSDKUtils.BuildUserAgentString("Comprehend", "3.7.300.84");
+            InternalSDKUtils.BuildUserAgentString("Comprehend", "4.0.0.0");
 
         private static readonly AmazonComprehendEndpointResolver EndpointResolver =
             new AmazonComprehendEndpointResolver();
diff --git a/sdk/src/Services/Comprehend/Properties/AssemblyInfo.cs b/sdk/src/Services/Comprehend/Properties/AssemblyInfo.cs
index 4e89e88aa4de..6347a6c702a6 100644
--- a/sdk/src/Services/Comprehend/Properties/AssemblyInfo.cs
+++ b/sdk/src/Services/Comprehend/Properties/AssemblyInfo.cs
@@ -41,5 +41,9 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.300.84")]
\ No newline at end of file
+#if BCL
+[assembly: AssemblyVersion("4.0")]
+#else
+[assembly: AssemblyVersion("4.0.0.0")]
+#endif
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/src/Services/ComprehendMedical/AWSSDK.ComprehendMedical.NetFramework.csproj b/sdk/src/Services/ComprehendMedical/AWSSDK.ComprehendMedical.NetFramework.csproj
index 28fb99678315..17987c7aca1f 100644
--- a/sdk/src/Services/ComprehendMedical/AWSSDK.ComprehendMedical.NetFramework.csproj
+++ b/sdk/src/Services/ComprehendMedical/AWSSDK.ComprehendMedical.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);BCL;AWS_ASYNC_API;CODE_ANALYSIS</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(RuleSetFileForBuild)' == 'false' Or '$(RuleSetFileForBuild)' == '' ">
diff --git a/sdk/src/Services/ComprehendMedical/AWSSDK.ComprehendMedical.NetStandard.csproj b/sdk/src/Services/ComprehendMedical/AWSSDK.ComprehendMedical.NetStandard.csproj
index 35db757831d6..a34feec3e6d4 100644
--- a/sdk/src/Services/ComprehendMedical/AWSSDK.ComprehendMedical.NetStandard.csproj
+++ b/sdk/src/Services/ComprehendMedical/AWSSDK.ComprehendMedical.NetStandard.csproj
@@ -22,6 +22,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <!-- Async Enumerable Compatibility -->
diff --git a/sdk/src/Services/ComprehendMedical/Generated/AmazonComprehendMedicalConfig.cs b/sdk/src/Services/ComprehendMedical/Generated/AmazonComprehendMedicalConfig.cs
index 2f1fe4ab0b5c..7c992b1f143f 100644
--- a/sdk/src/Services/ComprehendMedical/Generated/AmazonComprehendMedicalConfig.cs
+++ b/sdk/src/Services/ComprehendMedical/Generated/AmazonComprehendMedicalConfig.cs
@@ -34,7 +34,7 @@ namespace Amazon.ComprehendMedical
     public partial class AmazonComprehendMedicalConfig : ClientConfig
     {
         private static readonly string UserAgentString =
-            InternalSDKUtils.BuildUserAgentString("ComprehendMedical", "3.7.300.84");
+            InternalSDKUtils.BuildUserAgentString("ComprehendMedical", "4.0.0.0");
 
         private static readonly AmazonComprehendMedicalEndpointResolver EndpointResolver =
             new AmazonComprehendMedicalEndpointResolver();
diff --git a/sdk/src/Services/ComprehendMedical/Properties/AssemblyInfo.cs b/sdk/src/Services/ComprehendMedical/Properties/AssemblyInfo.cs
index af98b5817c9b..be846d3ae495 100644
--- a/sdk/src/Services/ComprehendMedical/Properties/AssemblyInfo.cs
+++ b/sdk/src/Services/ComprehendMedical/Properties/AssemblyInfo.cs
@@ -41,5 +41,9 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.300.84")]
\ No newline at end of file
+#if BCL
+[assembly: AssemblyVersion("4.0")]
+#else
+[assembly: AssemblyVersion("4.0.0.0")]
+#endif
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/src/Services/ComputeOptimizer/AWSSDK.ComputeOptimizer.NetFramework.csproj b/sdk/src/Services/ComputeOptimizer/AWSSDK.ComputeOptimizer.NetFramework.csproj
index 4daff8615b1e..87e8617c0915 100644
--- a/sdk/src/Services/ComputeOptimizer/AWSSDK.ComputeOptimizer.NetFramework.csproj
+++ b/sdk/src/Services/ComputeOptimizer/AWSSDK.ComputeOptimizer.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);BCL;AWS_ASYNC_API;CODE_ANALYSIS</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(RuleSetFileForBuild)' == 'false' Or '$(RuleSetFileForBuild)' == '' ">
diff --git a/sdk/src/Services/ComputeOptimizer/AWSSDK.ComputeOptimizer.NetStandard.csproj b/sdk/src/Services/ComputeOptimizer/AWSSDK.ComputeOptimizer.NetStandard.csproj
index 814ac36f043a..0ca8b1c9cb63 100644
--- a/sdk/src/Services/ComputeOptimizer/AWSSDK.ComputeOptimizer.NetStandard.csproj
+++ b/sdk/src/Services/ComputeOptimizer/AWSSDK.ComputeOptimizer.NetStandard.csproj
@@ -22,6 +22,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <!-- Async Enumerable Compatibility -->
diff --git a/sdk/src/Services/ComputeOptimizer/Generated/AmazonComputeOptimizerConfig.cs b/sdk/src/Services/ComputeOptimizer/Generated/AmazonComputeOptimizerConfig.cs
index d12a5c49a93d..022040cefbd0 100644
--- a/sdk/src/Services/ComputeOptimizer/Generated/AmazonComputeOptimizerConfig.cs
+++ b/sdk/src/Services/ComputeOptimizer/Generated/AmazonComputeOptimizerConfig.cs
@@ -34,7 +34,7 @@ namespace Amazon.ComputeOptimizer
     public partial class AmazonComputeOptimizerConfig : ClientConfig
     {
         private static readonly string UserAgentString =
-            InternalSDKUtils.BuildUserAgentString("Compute Optimizer", "3.7.302.20");
+            InternalSDKUtils.BuildUserAgentString("Compute Optimizer", "4.0.0.0");
 
         private static readonly AmazonComputeOptimizerEndpointResolver EndpointResolver =
             new AmazonComputeOptimizerEndpointResolver();
diff --git a/sdk/src/Services/ComputeOptimizer/Properties/AssemblyInfo.cs b/sdk/src/Services/ComputeOptimizer/Properties/AssemblyInfo.cs
index 5616202041cd..f29bdc690804 100644
--- a/sdk/src/Services/ComputeOptimizer/Properties/AssemblyInfo.cs
+++ b/sdk/src/Services/ComputeOptimizer/Properties/AssemblyInfo.cs
@@ -41,5 +41,9 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.302.20")]
\ No newline at end of file
+#if BCL
+[assembly: AssemblyVersion("4.0")]
+#else
+[assembly: AssemblyVersion("4.0.0.0")]
+#endif
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/src/Services/ConfigService/AWSSDK.ConfigService.NetFramework.csproj b/sdk/src/Services/ConfigService/AWSSDK.ConfigService.NetFramework.csproj
index 5baec837a5bb..3b779764df4c 100644
--- a/sdk/src/Services/ConfigService/AWSSDK.ConfigService.NetFramework.csproj
+++ b/sdk/src/Services/ConfigService/AWSSDK.ConfigService.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);BCL;AWS_ASYNC_API;CODE_ANALYSIS</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(RuleSetFileForBuild)' == 'false' Or '$(RuleSetFileForBuild)' == '' ">
diff --git a/sdk/src/Services/ConfigService/AWSSDK.ConfigService.NetStandard.csproj b/sdk/src/Services/ConfigService/AWSSDK.ConfigService.NetStandard.csproj
index 9f5c67950ec6..7f4b3e2f5e65 100644
--- a/sdk/src/Services/ConfigService/AWSSDK.ConfigService.NetStandard.csproj
+++ b/sdk/src/Services/ConfigService/AWSSDK.ConfigService.NetStandard.csproj
@@ -22,6 +22,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <!-- Async Enumerable Compatibility -->
diff --git a/sdk/src/Services/ConfigService/Generated/AmazonConfigServiceConfig.cs b/sdk/src/Services/ConfigService/Generated/AmazonConfigServiceConfig.cs
index bc779ff77aec..792ebf696574 100644
--- a/sdk/src/Services/ConfigService/Generated/AmazonConfigServiceConfig.cs
+++ b/sdk/src/Services/ConfigService/Generated/AmazonConfigServiceConfig.cs
@@ -34,7 +34,7 @@ namespace Amazon.ConfigService
     public partial class AmazonConfigServiceConfig : ClientConfig
     {
         private static readonly string UserAgentString =
-            InternalSDKUtils.BuildUserAgentString("Config Service", "3.7.302.56");
+            InternalSDKUtils.BuildUserAgentString("Config Service", "4.0.0.0");
 
         private static readonly AmazonConfigServiceEndpointResolver EndpointResolver =
             new AmazonConfigServiceEndpointResolver();
diff --git a/sdk/src/Services/ConfigService/Properties/AssemblyInfo.cs b/sdk/src/Services/ConfigService/Properties/AssemblyInfo.cs
index 737b1aaa746f..edc8f48c9596 100644
--- a/sdk/src/Services/ConfigService/Properties/AssemblyInfo.cs
+++ b/sdk/src/Services/ConfigService/Properties/AssemblyInfo.cs
@@ -41,5 +41,9 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.302.56")]
\ No newline at end of file
+#if BCL
+[assembly: AssemblyVersion("4.0")]
+#else
+[assembly: AssemblyVersion("4.0.0.0")]
+#endif
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/src/Services/Connect/AWSSDK.Connect.NetFramework.csproj b/sdk/src/Services/Connect/AWSSDK.Connect.NetFramework.csproj
index 397c0ad48b3a..ed76808b8f90 100644
--- a/sdk/src/Services/Connect/AWSSDK.Connect.NetFramework.csproj
+++ b/sdk/src/Services/Connect/AWSSDK.Connect.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);BCL;AWS_ASYNC_API;CODE_ANALYSIS</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(RuleSetFileForBuild)' == 'false' Or '$(RuleSetFileForBuild)' == '' ">
diff --git a/sdk/src/Services/Connect/AWSSDK.Connect.NetStandard.csproj b/sdk/src/Services/Connect/AWSSDK.Connect.NetStandard.csproj
index 234530e35c62..b19548a91adb 100644
--- a/sdk/src/Services/Connect/AWSSDK.Connect.NetStandard.csproj
+++ b/sdk/src/Services/Connect/AWSSDK.Connect.NetStandard.csproj
@@ -22,6 +22,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <!-- Async Enumerable Compatibility -->
diff --git a/sdk/src/Services/Connect/Generated/AmazonConnectConfig.cs b/sdk/src/Services/Connect/Generated/AmazonConnectConfig.cs
index 8882675d2923..428b802532d6 100644
--- a/sdk/src/Services/Connect/Generated/AmazonConnectConfig.cs
+++ b/sdk/src/Services/Connect/Generated/AmazonConnectConfig.cs
@@ -34,7 +34,7 @@ namespace Amazon.Connect
     public partial class AmazonConnectConfig : ClientConfig
     {
         private static readonly string UserAgentString =
-            InternalSDKUtils.BuildUserAgentString("Connect", "3.7.316.11");
+            InternalSDKUtils.BuildUserAgentString("Connect", "4.0.0.0");
 
         private static readonly AmazonConnectEndpointResolver EndpointResolver =
             new AmazonConnectEndpointResolver();
diff --git a/sdk/src/Services/Connect/Properties/AssemblyInfo.cs b/sdk/src/Services/Connect/Properties/AssemblyInfo.cs
index b7e4e7bbb8ee..bec799e8593d 100644
--- a/sdk/src/Services/Connect/Properties/AssemblyInfo.cs
+++ b/sdk/src/Services/Connect/Properties/AssemblyInfo.cs
@@ -41,5 +41,9 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.316.11")]
\ No newline at end of file
+#if BCL
+[assembly: AssemblyVersion("4.0")]
+#else
+[assembly: AssemblyVersion("4.0.0.0")]
+#endif
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/src/Services/ConnectCampaignService/AWSSDK.ConnectCampaignService.NetFramework.csproj b/sdk/src/Services/ConnectCampaignService/AWSSDK.ConnectCampaignService.NetFramework.csproj
index 889a562b7870..e8955e64a534 100644
--- a/sdk/src/Services/ConnectCampaignService/AWSSDK.ConnectCampaignService.NetFramework.csproj
+++ b/sdk/src/Services/ConnectCampaignService/AWSSDK.ConnectCampaignService.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);BCL;AWS_ASYNC_API;CODE_ANALYSIS</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(RuleSetFileForBuild)' == 'false' Or '$(RuleSetFileForBuild)' == '' ">
diff --git a/sdk/src/Services/ConnectCampaignService/AWSSDK.ConnectCampaignService.NetStandard.csproj b/sdk/src/Services/ConnectCampaignService/AWSSDK.ConnectCampaignService.NetStandard.csproj
index 87e08c0a166a..1e70ff2b9d88 100644
--- a/sdk/src/Services/ConnectCampaignService/AWSSDK.ConnectCampaignService.NetStandard.csproj
+++ b/sdk/src/Services/ConnectCampaignService/AWSSDK.ConnectCampaignService.NetStandard.csproj
@@ -22,6 +22,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <!-- Async Enumerable Compatibility -->
diff --git a/sdk/src/Services/ConnectCampaignService/Generated/AmazonConnectCampaignServiceConfig.cs b/sdk/src/Services/ConnectCampaignService/Generated/AmazonConnectCampaignServiceConfig.cs
index 7d4e8b88bc71..d7d52bb0b30f 100644
--- a/sdk/src/Services/ConnectCampaignService/Generated/AmazonConnectCampaignServiceConfig.cs
+++ b/sdk/src/Services/ConnectCampaignService/Generated/AmazonConnectCampaignServiceConfig.cs
@@ -34,7 +34,7 @@ namespace Amazon.ConnectCampaignService
     public partial class AmazonConnectCampaignServiceConfig : ClientConfig
     {
         private static readonly string UserAgentString =
-            InternalSDKUtils.BuildUserAgentString("ConnectCampaigns", "3.7.302.1");
+            InternalSDKUtils.BuildUserAgentString("ConnectCampaigns", "4.0.0.0");
 
         private static readonly AmazonConnectCampaignServiceEndpointResolver EndpointResolver =
             new AmazonConnectCampaignServiceEndpointResolver();
diff --git a/sdk/src/Services/ConnectCampaignService/Properties/AssemblyInfo.cs b/sdk/src/Services/ConnectCampaignService/Properties/AssemblyInfo.cs
index b78e8de5e2ce..7c56f536be90 100644
--- a/sdk/src/Services/ConnectCampaignService/Properties/AssemblyInfo.cs
+++ b/sdk/src/Services/ConnectCampaignService/Properties/AssemblyInfo.cs
@@ -41,5 +41,9 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.302.1")]
\ No newline at end of file
+#if BCL
+[assembly: AssemblyVersion("4.0")]
+#else
+[assembly: AssemblyVersion("4.0.0.0")]
+#endif
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/src/Services/ConnectCases/AWSSDK.ConnectCases.NetFramework.csproj b/sdk/src/Services/ConnectCases/AWSSDK.ConnectCases.NetFramework.csproj
index b68370cfa2c6..90f63cec96ba 100644
--- a/sdk/src/Services/ConnectCases/AWSSDK.ConnectCases.NetFramework.csproj
+++ b/sdk/src/Services/ConnectCases/AWSSDK.ConnectCases.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);BCL;AWS_ASYNC_API;CODE_ANALYSIS</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(RuleSetFileForBuild)' == 'false' Or '$(RuleSetFileForBuild)' == '' ">
diff --git a/sdk/src/Services/ConnectCases/AWSSDK.ConnectCases.NetStandard.csproj b/sdk/src/Services/ConnectCases/AWSSDK.ConnectCases.NetStandard.csproj
index 7a0fd0fec2e7..b6173124854e 100644
--- a/sdk/src/Services/ConnectCases/AWSSDK.ConnectCases.NetStandard.csproj
+++ b/sdk/src/Services/ConnectCases/AWSSDK.ConnectCases.NetStandard.csproj
@@ -22,6 +22,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <!-- Async Enumerable Compatibility -->
diff --git a/sdk/src/Services/ConnectCases/Generated/AmazonConnectCasesConfig.cs b/sdk/src/Services/ConnectCases/Generated/AmazonConnectCasesConfig.cs
index eb7e6ff4a7ac..1c77447b1a52 100644
--- a/sdk/src/Services/ConnectCases/Generated/AmazonConnectCasesConfig.cs
+++ b/sdk/src/Services/ConnectCases/Generated/AmazonConnectCasesConfig.cs
@@ -34,7 +34,7 @@ namespace Amazon.ConnectCases
     public partial class AmazonConnectCasesConfig : ClientConfig
     {
         private static readonly string UserAgentString =
-            InternalSDKUtils.BuildUserAgentString("ConnectCases", "3.7.303.0");
+            InternalSDKUtils.BuildUserAgentString("ConnectCases", "4.0.0.0");
 
         private static readonly AmazonConnectCasesEndpointResolver EndpointResolver =
             new AmazonConnectCasesEndpointResolver();
diff --git a/sdk/src/Services/ConnectCases/Properties/AssemblyInfo.cs b/sdk/src/Services/ConnectCases/Properties/AssemblyInfo.cs
index b4871987e9d2..a30c77cae3cf 100644
--- a/sdk/src/Services/ConnectCases/Properties/AssemblyInfo.cs
+++ b/sdk/src/Services/ConnectCases/Properties/AssemblyInfo.cs
@@ -41,5 +41,9 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.303.0")]
\ No newline at end of file
+#if BCL
+[assembly: AssemblyVersion("4.0")]
+#else
+[assembly: AssemblyVersion("4.0.0.0")]
+#endif
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/src/Services/ConnectContactLens/AWSSDK.ConnectContactLens.NetFramework.csproj b/sdk/src/Services/ConnectContactLens/AWSSDK.ConnectContactLens.NetFramework.csproj
index a331495fff0a..fd037e0d43a6 100644
--- a/sdk/src/Services/ConnectContactLens/AWSSDK.ConnectContactLens.NetFramework.csproj
+++ b/sdk/src/Services/ConnectContactLens/AWSSDK.ConnectContactLens.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);BCL;AWS_ASYNC_API;CODE_ANALYSIS</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(RuleSetFileForBuild)' == 'false' Or '$(RuleSetFileForBuild)' == '' ">
diff --git a/sdk/src/Services/ConnectContactLens/AWSSDK.ConnectContactLens.NetStandard.csproj b/sdk/src/Services/ConnectContactLens/AWSSDK.ConnectContactLens.NetStandard.csproj
index 70a8ad546f76..032578276c70 100644
--- a/sdk/src/Services/ConnectContactLens/AWSSDK.ConnectContactLens.NetStandard.csproj
+++ b/sdk/src/Services/ConnectContactLens/AWSSDK.ConnectContactLens.NetStandard.csproj
@@ -22,6 +22,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <!-- Async Enumerable Compatibility -->
diff --git a/sdk/src/Services/ConnectContactLens/Generated/AmazonConnectContactLensConfig.cs b/sdk/src/Services/ConnectContactLens/Generated/AmazonConnectContactLensConfig.cs
index 658af8a625dc..1e4694adf082 100644
--- a/sdk/src/Services/ConnectContactLens/Generated/AmazonConnectContactLensConfig.cs
+++ b/sdk/src/Services/ConnectContactLens/Generated/AmazonConnectContactLensConfig.cs
@@ -34,7 +34,7 @@ namespace Amazon.ConnectContactLens
     public partial class AmazonConnectContactLensConfig : ClientConfig
     {
         private static readonly string UserAgentString =
-            InternalSDKUtils.BuildUserAgentString("Connect Contact Lens", "3.7.300.84");
+            InternalSDKUtils.BuildUserAgentString("Connect Contact Lens", "4.0.0.0");
 
         private static readonly AmazonConnectContactLensEndpointResolver EndpointResolver =
             new AmazonConnectContactLensEndpointResolver();
diff --git a/sdk/src/Services/ConnectContactLens/Properties/AssemblyInfo.cs b/sdk/src/Services/ConnectContactLens/Properties/AssemblyInfo.cs
index 1f046451e71e..02e27bfd35cf 100644
--- a/sdk/src/Services/ConnectContactLens/Properties/AssemblyInfo.cs
+++ b/sdk/src/Services/ConnectContactLens/Properties/AssemblyInfo.cs
@@ -41,5 +41,9 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.300.84")]
\ No newline at end of file
+#if BCL
+[assembly: AssemblyVersion("4.0")]
+#else
+[assembly: AssemblyVersion("4.0.0.0")]
+#endif
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/src/Services/ConnectParticipant/AWSSDK.ConnectParticipant.NetFramework.csproj b/sdk/src/Services/ConnectParticipant/AWSSDK.ConnectParticipant.NetFramework.csproj
index 5e173755a691..8ab3e896c170 100644
--- a/sdk/src/Services/ConnectParticipant/AWSSDK.ConnectParticipant.NetFramework.csproj
+++ b/sdk/src/Services/ConnectParticipant/AWSSDK.ConnectParticipant.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);BCL;AWS_ASYNC_API;CODE_ANALYSIS</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(RuleSetFileForBuild)' == 'false' Or '$(RuleSetFileForBuild)' == '' ">
diff --git a/sdk/src/Services/ConnectParticipant/AWSSDK.ConnectParticipant.NetStandard.csproj b/sdk/src/Services/ConnectParticipant/AWSSDK.ConnectParticipant.NetStandard.csproj
index db54dd23da53..e44d665d539b 100644
--- a/sdk/src/Services/ConnectParticipant/AWSSDK.ConnectParticipant.NetStandard.csproj
+++ b/sdk/src/Services/ConnectParticipant/AWSSDK.ConnectParticipant.NetStandard.csproj
@@ -22,6 +22,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <!-- Async Enumerable Compatibility -->
diff --git a/sdk/src/Services/ConnectParticipant/Generated/AmazonConnectParticipantConfig.cs b/sdk/src/Services/ConnectParticipant/Generated/AmazonConnectParticipantConfig.cs
index 1920953b80b5..736f657dc6d8 100644
--- a/sdk/src/Services/ConnectParticipant/Generated/AmazonConnectParticipantConfig.cs
+++ b/sdk/src/Services/ConnectParticipant/Generated/AmazonConnectParticipantConfig.cs
@@ -34,7 +34,7 @@ namespace Amazon.ConnectParticipant
     public partial class AmazonConnectParticipantConfig : ClientConfig
     {
         private static readonly string UserAgentString =
-            InternalSDKUtils.BuildUserAgentString("ConnectParticipant", "3.7.301.49");
+            InternalSDKUtils.BuildUserAgentString("ConnectParticipant", "4.0.0.0");
 
         private static readonly AmazonConnectParticipantEndpointResolver EndpointResolver =
             new AmazonConnectParticipantEndpointResolver();
diff --git a/sdk/src/Services/ConnectParticipant/Properties/AssemblyInfo.cs b/sdk/src/Services/ConnectParticipant/Properties/AssemblyInfo.cs
index 2745dd8fbba1..3ee33814c564 100644
--- a/sdk/src/Services/ConnectParticipant/Properties/AssemblyInfo.cs
+++ b/sdk/src/Services/ConnectParticipant/Properties/AssemblyInfo.cs
@@ -41,5 +41,9 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.301.49")]
\ No newline at end of file
+#if BCL
+[assembly: AssemblyVersion("4.0")]
+#else
+[assembly: AssemblyVersion("4.0.0.0")]
+#endif
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/src/Services/ConnectWisdomService/AWSSDK.ConnectWisdomService.NetFramework.csproj b/sdk/src/Services/ConnectWisdomService/AWSSDK.ConnectWisdomService.NetFramework.csproj
index 0be693b26631..d7ed20110ea8 100644
--- a/sdk/src/Services/ConnectWisdomService/AWSSDK.ConnectWisdomService.NetFramework.csproj
+++ b/sdk/src/Services/ConnectWisdomService/AWSSDK.ConnectWisdomService.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);BCL;AWS_ASYNC_API;CODE_ANALYSIS</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(RuleSetFileForBuild)' == 'false' Or '$(RuleSetFileForBuild)' == '' ">
diff --git a/sdk/src/Services/ConnectWisdomService/AWSSDK.ConnectWisdomService.NetStandard.csproj b/sdk/src/Services/ConnectWisdomService/AWSSDK.ConnectWisdomService.NetStandard.csproj
index fb05165f1efb..da3dabcbae27 100644
--- a/sdk/src/Services/ConnectWisdomService/AWSSDK.ConnectWisdomService.NetStandard.csproj
+++ b/sdk/src/Services/ConnectWisdomService/AWSSDK.ConnectWisdomService.NetStandard.csproj
@@ -22,6 +22,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <!-- Async Enumerable Compatibility -->
diff --git a/sdk/src/Services/ConnectWisdomService/Generated/AmazonConnectWisdomServiceConfig.cs b/sdk/src/Services/ConnectWisdomService/Generated/AmazonConnectWisdomServiceConfig.cs
index b51ead1da843..9a806278991a 100644
--- a/sdk/src/Services/ConnectWisdomService/Generated/AmazonConnectWisdomServiceConfig.cs
+++ b/sdk/src/Services/ConnectWisdomService/Generated/AmazonConnectWisdomServiceConfig.cs
@@ -34,7 +34,7 @@ namespace Amazon.ConnectWisdomService
     public partial class AmazonConnectWisdomServiceConfig : ClientConfig
     {
         private static readonly string UserAgentString =
-            InternalSDKUtils.BuildUserAgentString("Wisdom", "3.7.302.51");
+            InternalSDKUtils.BuildUserAgentString("Wisdom", "4.0.0.0");
 
         private static readonly AmazonConnectWisdomServiceEndpointResolver EndpointResolver =
             new AmazonConnectWisdomServiceEndpointResolver();
diff --git a/sdk/src/Services/ConnectWisdomService/Properties/AssemblyInfo.cs b/sdk/src/Services/ConnectWisdomService/Properties/AssemblyInfo.cs
index d0e56e81feb5..83371fdf6ebe 100644
--- a/sdk/src/Services/ConnectWisdomService/Properties/AssemblyInfo.cs
+++ b/sdk/src/Services/ConnectWisdomService/Properties/AssemblyInfo.cs
@@ -41,5 +41,9 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.302.51")]
\ No newline at end of file
+#if BCL
+[assembly: AssemblyVersion("4.0")]
+#else
+[assembly: AssemblyVersion("4.0.0.0")]
+#endif
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/src/Services/ControlCatalog/AWSSDK.ControlCatalog.NetFramework.csproj b/sdk/src/Services/ControlCatalog/AWSSDK.ControlCatalog.NetFramework.csproj
index 42ffd0fca2c4..e525e9377ee7 100644
--- a/sdk/src/Services/ControlCatalog/AWSSDK.ControlCatalog.NetFramework.csproj
+++ b/sdk/src/Services/ControlCatalog/AWSSDK.ControlCatalog.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);BCL;AWS_ASYNC_API;CODE_ANALYSIS</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(RuleSetFileForBuild)' == 'false' Or '$(RuleSetFileForBuild)' == '' ">
diff --git a/sdk/src/Services/ControlCatalog/AWSSDK.ControlCatalog.NetStandard.csproj b/sdk/src/Services/ControlCatalog/AWSSDK.ControlCatalog.NetStandard.csproj
index e5ca6229b7b5..2e85349d2577 100644
--- a/sdk/src/Services/ControlCatalog/AWSSDK.ControlCatalog.NetStandard.csproj
+++ b/sdk/src/Services/ControlCatalog/AWSSDK.ControlCatalog.NetStandard.csproj
@@ -22,6 +22,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <!-- Async Enumerable Compatibility -->
diff --git a/sdk/src/Services/ControlCatalog/Generated/AmazonControlCatalogConfig.cs b/sdk/src/Services/ControlCatalog/Generated/AmazonControlCatalogConfig.cs
index b09e2b90440c..6d9059c4e9ca 100644
--- a/sdk/src/Services/ControlCatalog/Generated/AmazonControlCatalogConfig.cs
+++ b/sdk/src/Services/ControlCatalog/Generated/AmazonControlCatalogConfig.cs
@@ -34,7 +34,7 @@ namespace Amazon.ControlCatalog
     public partial class AmazonControlCatalogConfig : ClientConfig
     {
         private static readonly string UserAgentString =
-            InternalSDKUtils.BuildUserAgentString("ControlCatalog", "3.7.300.13");
+            InternalSDKUtils.BuildUserAgentString("ControlCatalog", "4.0.0.0");
 
         private static readonly AmazonControlCatalogEndpointResolver EndpointResolver =
             new AmazonControlCatalogEndpointResolver();
diff --git a/sdk/src/Services/ControlCatalog/Properties/AssemblyInfo.cs b/sdk/src/Services/ControlCatalog/Properties/AssemblyInfo.cs
index 2a69edb78e59..cd8348eadbed 100644
--- a/sdk/src/Services/ControlCatalog/Properties/AssemblyInfo.cs
+++ b/sdk/src/Services/ControlCatalog/Properties/AssemblyInfo.cs
@@ -41,5 +41,9 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.300.13")]
\ No newline at end of file
+#if BCL
+[assembly: AssemblyVersion("4.0")]
+#else
+[assembly: AssemblyVersion("4.0.0.0")]
+#endif
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/src/Services/ControlTower/AWSSDK.ControlTower.NetFramework.csproj b/sdk/src/Services/ControlTower/AWSSDK.ControlTower.NetFramework.csproj
index f050ca06646d..a46d235b7d89 100644
--- a/sdk/src/Services/ControlTower/AWSSDK.ControlTower.NetFramework.csproj
+++ b/sdk/src/Services/ControlTower/AWSSDK.ControlTower.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);BCL;AWS_ASYNC_API;CODE_ANALYSIS</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(RuleSetFileForBuild)' == 'false' Or '$(RuleSetFileForBuild)' == '' ">
diff --git a/sdk/src/Services/ControlTower/AWSSDK.ControlTower.NetStandard.csproj b/sdk/src/Services/ControlTower/AWSSDK.ControlTower.NetStandard.csproj
index f2be59abfb21..e21ab5a07b86 100644
--- a/sdk/src/Services/ControlTower/AWSSDK.ControlTower.NetStandard.csproj
+++ b/sdk/src/Services/ControlTower/AWSSDK.ControlTower.NetStandard.csproj
@@ -22,6 +22,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <!-- Async Enumerable Compatibility -->
diff --git a/sdk/src/Services/ControlTower/Generated/AmazonControlTowerConfig.cs b/sdk/src/Services/ControlTower/Generated/AmazonControlTowerConfig.cs
index 6da772a2c845..fb47a4c34b90 100644
--- a/sdk/src/Services/ControlTower/Generated/AmazonControlTowerConfig.cs
+++ b/sdk/src/Services/ControlTower/Generated/AmazonControlTowerConfig.cs
@@ -34,7 +34,7 @@ namespace Amazon.ControlTower
     public partial class AmazonControlTowerConfig : ClientConfig
     {
         private static readonly string UserAgentString =
-            InternalSDKUtils.BuildUserAgentString("ControlTower", "3.7.304.34");
+            InternalSDKUtils.BuildUserAgentString("ControlTower", "4.0.0.0");
 
         private static readonly AmazonControlTowerEndpointResolver EndpointResolver =
             new AmazonControlTowerEndpointResolver();
diff --git a/sdk/src/Services/ControlTower/Properties/AssemblyInfo.cs b/sdk/src/Services/ControlTower/Properties/AssemblyInfo.cs
index efb83ed4a4cf..2eb0d6e3b3ab 100644
--- a/sdk/src/Services/ControlTower/Properties/AssemblyInfo.cs
+++ b/sdk/src/Services/ControlTower/Properties/AssemblyInfo.cs
@@ -41,5 +41,9 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.304.34")]
\ No newline at end of file
+#if BCL
+[assembly: AssemblyVersion("4.0")]
+#else
+[assembly: AssemblyVersion("4.0.0.0")]
+#endif
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/src/Services/CostAndUsageReport/AWSSDK.CostAndUsageReport.NetFramework.csproj b/sdk/src/Services/CostAndUsageReport/AWSSDK.CostAndUsageReport.NetFramework.csproj
index d74b1e9f1f57..cc6b934dbee1 100644
--- a/sdk/src/Services/CostAndUsageReport/AWSSDK.CostAndUsageReport.NetFramework.csproj
+++ b/sdk/src/Services/CostAndUsageReport/AWSSDK.CostAndUsageReport.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);BCL;AWS_ASYNC_API;CODE_ANALYSIS</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(RuleSetFileForBuild)' == 'false' Or '$(RuleSetFileForBuild)' == '' ">
diff --git a/sdk/src/Services/CostAndUsageReport/AWSSDK.CostAndUsageReport.NetStandard.csproj b/sdk/src/Services/CostAndUsageReport/AWSSDK.CostAndUsageReport.NetStandard.csproj
index 8a078be001af..271fd0f6bd74 100644
--- a/sdk/src/Services/CostAndUsageReport/AWSSDK.CostAndUsageReport.NetStandard.csproj
+++ b/sdk/src/Services/CostAndUsageReport/AWSSDK.CostAndUsageReport.NetStandard.csproj
@@ -22,6 +22,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <!-- Async Enumerable Compatibility -->
diff --git a/sdk/src/Services/CostAndUsageReport/Generated/AmazonCostAndUsageReportConfig.cs b/sdk/src/Services/CostAndUsageReport/Generated/AmazonCostAndUsageReportConfig.cs
index b1200b16b106..e2e9a557e7ee 100644
--- a/sdk/src/Services/CostAndUsageReport/Generated/AmazonCostAndUsageReportConfig.cs
+++ b/sdk/src/Services/CostAndUsageReport/Generated/AmazonCostAndUsageReportConfig.cs
@@ -34,7 +34,7 @@ namespace Amazon.CostAndUsageReport
     public partial class AmazonCostAndUsageReportConfig : ClientConfig
     {
         private static readonly string UserAgentString =
-            InternalSDKUtils.BuildUserAgentString("Cost and Usage Report Service", "3.7.301.84");
+            InternalSDKUtils.BuildUserAgentString("Cost and Usage Report Service", "4.0.0.0");
 
         private static readonly AmazonCostAndUsageReportEndpointResolver EndpointResolver =
             new AmazonCostAndUsageReportEndpointResolver();
diff --git a/sdk/src/Services/CostAndUsageReport/Properties/AssemblyInfo.cs b/sdk/src/Services/CostAndUsageReport/Properties/AssemblyInfo.cs
index 4372e961825a..559d34db05a3 100644
--- a/sdk/src/Services/CostAndUsageReport/Properties/AssemblyInfo.cs
+++ b/sdk/src/Services/CostAndUsageReport/Properties/AssemblyInfo.cs
@@ -41,5 +41,9 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.301.84")]
\ No newline at end of file
+#if BCL
+[assembly: AssemblyVersion("4.0")]
+#else
+[assembly: AssemblyVersion("4.0.0.0")]
+#endif
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/src/Services/CostExplorer/AWSSDK.CostExplorer.NetFramework.csproj b/sdk/src/Services/CostExplorer/AWSSDK.CostExplorer.NetFramework.csproj
index c5f88284d93c..2d6e448f4692 100644
--- a/sdk/src/Services/CostExplorer/AWSSDK.CostExplorer.NetFramework.csproj
+++ b/sdk/src/Services/CostExplorer/AWSSDK.CostExplorer.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);BCL;AWS_ASYNC_API;CODE_ANALYSIS</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(RuleSetFileForBuild)' == 'false' Or '$(RuleSetFileForBuild)' == '' ">
diff --git a/sdk/src/Services/CostExplorer/AWSSDK.CostExplorer.NetStandard.csproj b/sdk/src/Services/CostExplorer/AWSSDK.CostExplorer.NetStandard.csproj
index bf24d42bc832..c7b4014257ce 100644
--- a/sdk/src/Services/CostExplorer/AWSSDK.CostExplorer.NetStandard.csproj
+++ b/sdk/src/Services/CostExplorer/AWSSDK.CostExplorer.NetStandard.csproj
@@ -22,6 +22,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <!-- Async Enumerable Compatibility -->
diff --git a/sdk/src/Services/CostExplorer/Generated/AmazonCostExplorerConfig.cs b/sdk/src/Services/CostExplorer/Generated/AmazonCostExplorerConfig.cs
index 29bc0d0d6140..b4560ce0f9bf 100644
--- a/sdk/src/Services/CostExplorer/Generated/AmazonCostExplorerConfig.cs
+++ b/sdk/src/Services/CostExplorer/Generated/AmazonCostExplorerConfig.cs
@@ -34,7 +34,7 @@ namespace Amazon.CostExplorer
     public partial class AmazonCostExplorerConfig : ClientConfig
     {
         private static readonly string UserAgentString =
-            InternalSDKUtils.BuildUserAgentString("Cost Explorer", "3.7.303.4");
+            InternalSDKUtils.BuildUserAgentString("Cost Explorer", "4.0.0.0");
 
         private static readonly AmazonCostExplorerEndpointResolver EndpointResolver =
             new AmazonCostExplorerEndpointResolver();
diff --git a/sdk/src/Services/CostExplorer/Properties/AssemblyInfo.cs b/sdk/src/Services/CostExplorer/Properties/AssemblyInfo.cs
index 0e05adab9257..14bbde08945a 100644
--- a/sdk/src/Services/CostExplorer/Properties/AssemblyInfo.cs
+++ b/sdk/src/Services/CostExplorer/Properties/AssemblyInfo.cs
@@ -41,5 +41,9 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.303.4")]
\ No newline at end of file
+#if BCL
+[assembly: AssemblyVersion("4.0")]
+#else
+[assembly: AssemblyVersion("4.0.0.0")]
+#endif
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/src/Services/CostOptimizationHub/AWSSDK.CostOptimizationHub.NetFramework.csproj b/sdk/src/Services/CostOptimizationHub/AWSSDK.CostOptimizationHub.NetFramework.csproj
index 6289dea784f6..a82564214959 100644
--- a/sdk/src/Services/CostOptimizationHub/AWSSDK.CostOptimizationHub.NetFramework.csproj
+++ b/sdk/src/Services/CostOptimizationHub/AWSSDK.CostOptimizationHub.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);BCL;AWS_ASYNC_API;CODE_ANALYSIS</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(RuleSetFileForBuild)' == 'false' Or '$(RuleSetFileForBuild)' == '' ">
diff --git a/sdk/src/Services/CostOptimizationHub/AWSSDK.CostOptimizationHub.NetStandard.csproj b/sdk/src/Services/CostOptimizationHub/AWSSDK.CostOptimizationHub.NetStandard.csproj
index e270be8044eb..a73473f535f4 100644
--- a/sdk/src/Services/CostOptimizationHub/AWSSDK.CostOptimizationHub.NetStandard.csproj
+++ b/sdk/src/Services/CostOptimizationHub/AWSSDK.CostOptimizationHub.NetStandard.csproj
@@ -22,6 +22,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <!-- Async Enumerable Compatibility -->
diff --git a/sdk/src/Services/CostOptimizationHub/Generated/AmazonCostOptimizationHubConfig.cs b/sdk/src/Services/CostOptimizationHub/Generated/AmazonCostOptimizationHubConfig.cs
index fc6404584fbb..f604dcc097f8 100644
--- a/sdk/src/Services/CostOptimizationHub/Generated/AmazonCostOptimizationHubConfig.cs
+++ b/sdk/src/Services/CostOptimizationHub/Generated/AmazonCostOptimizationHubConfig.cs
@@ -34,7 +34,7 @@ namespace Amazon.CostOptimizationHub
     public partial class AmazonCostOptimizationHubConfig : ClientConfig
     {
         private static readonly string UserAgentString =
-            InternalSDKUtils.BuildUserAgentString("Cost Optimization Hub", "3.7.301.36");
+            InternalSDKUtils.BuildUserAgentString("Cost Optimization Hub", "4.0.0.0");
 
         private static readonly AmazonCostOptimizationHubEndpointResolver EndpointResolver =
             new AmazonCostOptimizationHubEndpointResolver();
diff --git a/sdk/src/Services/CostOptimizationHub/Properties/AssemblyInfo.cs b/sdk/src/Services/CostOptimizationHub/Properties/AssemblyInfo.cs
index 1f70636e7096..c840208432d2 100644
--- a/sdk/src/Services/CostOptimizationHub/Properties/AssemblyInfo.cs
+++ b/sdk/src/Services/CostOptimizationHub/Properties/AssemblyInfo.cs
@@ -41,5 +41,9 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.301.36")]
\ No newline at end of file
+#if BCL
+[assembly: AssemblyVersion("4.0")]
+#else
+[assembly: AssemblyVersion("4.0.0.0")]
+#endif
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/src/Services/CustomerProfiles/AWSSDK.CustomerProfiles.NetFramework.csproj b/sdk/src/Services/CustomerProfiles/AWSSDK.CustomerProfiles.NetFramework.csproj
index 00bfb27c852f..e16cd730dcf0 100644
--- a/sdk/src/Services/CustomerProfiles/AWSSDK.CustomerProfiles.NetFramework.csproj
+++ b/sdk/src/Services/CustomerProfiles/AWSSDK.CustomerProfiles.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);BCL;AWS_ASYNC_API;CODE_ANALYSIS</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(RuleSetFileForBuild)' == 'false' Or '$(RuleSetFileForBuild)' == '' ">
diff --git a/sdk/src/Services/CustomerProfiles/AWSSDK.CustomerProfiles.NetStandard.csproj b/sdk/src/Services/CustomerProfiles/AWSSDK.CustomerProfiles.NetStandard.csproj
index 097e60805ad0..aad992ad9430 100644
--- a/sdk/src/Services/CustomerProfiles/AWSSDK.CustomerProfiles.NetStandard.csproj
+++ b/sdk/src/Services/CustomerProfiles/AWSSDK.CustomerProfiles.NetStandard.csproj
@@ -22,6 +22,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <!-- Async Enumerable Compatibility -->
diff --git a/sdk/src/Services/CustomerProfiles/Generated/AmazonCustomerProfilesConfig.cs b/sdk/src/Services/CustomerProfiles/Generated/AmazonCustomerProfilesConfig.cs
index 02615f6e7837..62ef715279d0 100644
--- a/sdk/src/Services/CustomerProfiles/Generated/AmazonCustomerProfilesConfig.cs
+++ b/sdk/src/Services/CustomerProfiles/Generated/AmazonCustomerProfilesConfig.cs
@@ -34,7 +34,7 @@ namespace Amazon.CustomerProfiles
     public partial class AmazonCustomerProfilesConfig : ClientConfig
     {
         private static readonly string UserAgentString =
-            InternalSDKUtils.BuildUserAgentString("Customer Profiles", "3.7.301.73");
+            InternalSDKUtils.BuildUserAgentString("Customer Profiles", "4.0.0.0");
 
         private static readonly AmazonCustomerProfilesEndpointResolver EndpointResolver =
             new AmazonCustomerProfilesEndpointResolver();
diff --git a/sdk/src/Services/CustomerProfiles/Properties/AssemblyInfo.cs b/sdk/src/Services/CustomerProfiles/Properties/AssemblyInfo.cs
index 64d5b2bf862e..9345d5fb643b 100644
--- a/sdk/src/Services/CustomerProfiles/Properties/AssemblyInfo.cs
+++ b/sdk/src/Services/CustomerProfiles/Properties/AssemblyInfo.cs
@@ -41,5 +41,9 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.301.73")]
\ No newline at end of file
+#if BCL
+[assembly: AssemblyVersion("4.0")]
+#else
+[assembly: AssemblyVersion("4.0.0.0")]
+#endif
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/src/Services/DAX/AWSSDK.DAX.NetFramework.csproj b/sdk/src/Services/DAX/AWSSDK.DAX.NetFramework.csproj
index be79eb12436b..80517d6de3b0 100644
--- a/sdk/src/Services/DAX/AWSSDK.DAX.NetFramework.csproj
+++ b/sdk/src/Services/DAX/AWSSDK.DAX.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);BCL;AWS_ASYNC_API;CODE_ANALYSIS</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(RuleSetFileForBuild)' == 'false' Or '$(RuleSetFileForBuild)' == '' ">
diff --git a/sdk/src/Services/DAX/AWSSDK.DAX.NetStandard.csproj b/sdk/src/Services/DAX/AWSSDK.DAX.NetStandard.csproj
index c718080de6b6..1145f44a12c9 100644
--- a/sdk/src/Services/DAX/AWSSDK.DAX.NetStandard.csproj
+++ b/sdk/src/Services/DAX/AWSSDK.DAX.NetStandard.csproj
@@ -22,6 +22,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <!-- Async Enumerable Compatibility -->
diff --git a/sdk/src/Services/DAX/Generated/AmazonDAXConfig.cs b/sdk/src/Services/DAX/Generated/AmazonDAXConfig.cs
index 634e135fc8fa..eba941fbe68a 100644
--- a/sdk/src/Services/DAX/Generated/AmazonDAXConfig.cs
+++ b/sdk/src/Services/DAX/Generated/AmazonDAXConfig.cs
@@ -34,7 +34,7 @@ namespace Amazon.DAX
     public partial class AmazonDAXConfig : ClientConfig
     {
         private static readonly string UserAgentString =
-            InternalSDKUtils.BuildUserAgentString("DAX", "3.7.300.84");
+            InternalSDKUtils.BuildUserAgentString("DAX", "4.0.0.0");
 
         private static readonly AmazonDAXEndpointResolver EndpointResolver =
             new AmazonDAXEndpointResolver();
diff --git a/sdk/src/Services/DAX/Properties/AssemblyInfo.cs b/sdk/src/Services/DAX/Properties/AssemblyInfo.cs
index 7928bbe775d8..e7a1ccb3f4bb 100644
--- a/sdk/src/Services/DAX/Properties/AssemblyInfo.cs
+++ b/sdk/src/Services/DAX/Properties/AssemblyInfo.cs
@@ -41,5 +41,9 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.300.84")]
\ No newline at end of file
+#if BCL
+[assembly: AssemblyVersion("4.0")]
+#else
+[assembly: AssemblyVersion("4.0.0.0")]
+#endif
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/src/Services/DLM/AWSSDK.DLM.NetFramework.csproj b/sdk/src/Services/DLM/AWSSDK.DLM.NetFramework.csproj
index e50dbc74452c..22ae8abebd15 100644
--- a/sdk/src/Services/DLM/AWSSDK.DLM.NetFramework.csproj
+++ b/sdk/src/Services/DLM/AWSSDK.DLM.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);BCL;AWS_ASYNC_API;CODE_ANALYSIS</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(RuleSetFileForBuild)' == 'false' Or '$(RuleSetFileForBuild)' == '' ">
diff --git a/sdk/src/Services/DLM/AWSSDK.DLM.NetStandard.csproj b/sdk/src/Services/DLM/AWSSDK.DLM.NetStandard.csproj
index 8ef25e0644d5..f5af550cb4be 100644
--- a/sdk/src/Services/DLM/AWSSDK.DLM.NetStandard.csproj
+++ b/sdk/src/Services/DLM/AWSSDK.DLM.NetStandard.csproj
@@ -22,6 +22,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <!-- Async Enumerable Compatibility -->
diff --git a/sdk/src/Services/DLM/Generated/AmazonDLMConfig.cs b/sdk/src/Services/DLM/Generated/AmazonDLMConfig.cs
index 9563361434b4..2ef63934ad3a 100644
--- a/sdk/src/Services/DLM/Generated/AmazonDLMConfig.cs
+++ b/sdk/src/Services/DLM/Generated/AmazonDLMConfig.cs
@@ -34,7 +34,7 @@ namespace Amazon.DLM
     public partial class AmazonDLMConfig : ClientConfig
     {
         private static readonly string UserAgentString =
-            InternalSDKUtils.BuildUserAgentString("DLM", "3.7.301.80");
+            InternalSDKUtils.BuildUserAgentString("DLM", "4.0.0.0");
 
         private static readonly AmazonDLMEndpointResolver EndpointResolver =
             new AmazonDLMEndpointResolver();
diff --git a/sdk/src/Services/DLM/Properties/AssemblyInfo.cs b/sdk/src/Services/DLM/Properties/AssemblyInfo.cs
index c025c0d2ceb0..536e533fe39a 100644
--- a/sdk/src/Services/DLM/Properties/AssemblyInfo.cs
+++ b/sdk/src/Services/DLM/Properties/AssemblyInfo.cs
@@ -41,5 +41,9 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.301.80")]
\ No newline at end of file
+#if BCL
+[assembly: AssemblyVersion("4.0")]
+#else
+[assembly: AssemblyVersion("4.0.0.0")]
+#endif
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/src/Services/DataExchange/AWSSDK.DataExchange.NetFramework.csproj b/sdk/src/Services/DataExchange/AWSSDK.DataExchange.NetFramework.csproj
index 10ca41988906..f8897459fbe8 100644
--- a/sdk/src/Services/DataExchange/AWSSDK.DataExchange.NetFramework.csproj
+++ b/sdk/src/Services/DataExchange/AWSSDK.DataExchange.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);BCL;AWS_ASYNC_API;CODE_ANALYSIS</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(RuleSetFileForBuild)' == 'false' Or '$(RuleSetFileForBuild)' == '' ">
diff --git a/sdk/src/Services/DataExchange/AWSSDK.DataExchange.NetStandard.csproj b/sdk/src/Services/DataExchange/AWSSDK.DataExchange.NetStandard.csproj
index c5dbad9ccf44..c5df3bc6cd5b 100644
--- a/sdk/src/Services/DataExchange/AWSSDK.DataExchange.NetStandard.csproj
+++ b/sdk/src/Services/DataExchange/AWSSDK.DataExchange.NetStandard.csproj
@@ -22,6 +22,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <!-- Async Enumerable Compatibility -->
diff --git a/sdk/src/Services/DataExchange/Generated/AmazonDataExchangeConfig.cs b/sdk/src/Services/DataExchange/Generated/AmazonDataExchangeConfig.cs
index 35bd6f387fa7..85ca3676aca4 100644
--- a/sdk/src/Services/DataExchange/Generated/AmazonDataExchangeConfig.cs
+++ b/sdk/src/Services/DataExchange/Generated/AmazonDataExchangeConfig.cs
@@ -34,7 +34,7 @@ namespace Amazon.DataExchange
     public partial class AmazonDataExchangeConfig : ClientConfig
     {
         private static readonly string UserAgentString =
-            InternalSDKUtils.BuildUserAgentString("DataExchange", "3.7.301.83");
+            InternalSDKUtils.BuildUserAgentString("DataExchange", "4.0.0.0");
 
         private static readonly AmazonDataExchangeEndpointResolver EndpointResolver =
             new AmazonDataExchangeEndpointResolver();
diff --git a/sdk/src/Services/DataExchange/Properties/AssemblyInfo.cs b/sdk/src/Services/DataExchange/Properties/AssemblyInfo.cs
index 158a2059fefa..9d378c2bdf53 100644
--- a/sdk/src/Services/DataExchange/Properties/AssemblyInfo.cs
+++ b/sdk/src/Services/DataExchange/Properties/AssemblyInfo.cs
@@ -41,5 +41,9 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.301.83")]
\ No newline at end of file
+#if BCL
+[assembly: AssemblyVersion("4.0")]
+#else
+[assembly: AssemblyVersion("4.0.0.0")]
+#endif
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/src/Services/DataPipeline/AWSSDK.DataPipeline.NetFramework.csproj b/sdk/src/Services/DataPipeline/AWSSDK.DataPipeline.NetFramework.csproj
index 55de200dcbf2..653b5e73782c 100644
--- a/sdk/src/Services/DataPipeline/AWSSDK.DataPipeline.NetFramework.csproj
+++ b/sdk/src/Services/DataPipeline/AWSSDK.DataPipeline.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);BCL;AWS_ASYNC_API;CODE_ANALYSIS</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(RuleSetFileForBuild)' == 'false' Or '$(RuleSetFileForBuild)' == '' ">
diff --git a/sdk/src/Services/DataPipeline/AWSSDK.DataPipeline.NetStandard.csproj b/sdk/src/Services/DataPipeline/AWSSDK.DataPipeline.NetStandard.csproj
index 80fee023936c..86eebe2cc65b 100644
--- a/sdk/src/Services/DataPipeline/AWSSDK.DataPipeline.NetStandard.csproj
+++ b/sdk/src/Services/DataPipeline/AWSSDK.DataPipeline.NetStandard.csproj
@@ -22,6 +22,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <!-- Async Enumerable Compatibility -->
diff --git a/sdk/src/Services/DataPipeline/Generated/AmazonDataPipelineConfig.cs b/sdk/src/Services/DataPipeline/Generated/AmazonDataPipelineConfig.cs
index 74f37f234934..f23ca9dfd9ff 100644
--- a/sdk/src/Services/DataPipeline/Generated/AmazonDataPipelineConfig.cs
+++ b/sdk/src/Services/DataPipeline/Generated/AmazonDataPipelineConfig.cs
@@ -34,7 +34,7 @@ namespace Amazon.DataPipeline
     public partial class AmazonDataPipelineConfig : ClientConfig
     {
         private static readonly string UserAgentString =
-            InternalSDKUtils.BuildUserAgentString("Data Pipeline", "3.7.300.84");
+            InternalSDKUtils.BuildUserAgentString("Data Pipeline", "4.0.0.0");
 
         private static readonly AmazonDataPipelineEndpointResolver EndpointResolver =
             new AmazonDataPipelineEndpointResolver();
diff --git a/sdk/src/Services/DataPipeline/Properties/AssemblyInfo.cs b/sdk/src/Services/DataPipeline/Properties/AssemblyInfo.cs
index f07b2a8358d2..358c6db92690 100644
--- a/sdk/src/Services/DataPipeline/Properties/AssemblyInfo.cs
+++ b/sdk/src/Services/DataPipeline/Properties/AssemblyInfo.cs
@@ -41,5 +41,9 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.300.84")]
\ No newline at end of file
+#if BCL
+[assembly: AssemblyVersion("4.0")]
+#else
+[assembly: AssemblyVersion("4.0.0.0")]
+#endif
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/src/Services/DataSync/AWSSDK.DataSync.NetFramework.csproj b/sdk/src/Services/DataSync/AWSSDK.DataSync.NetFramework.csproj
index ff0fc5780aef..e6e74e9f19b8 100644
--- a/sdk/src/Services/DataSync/AWSSDK.DataSync.NetFramework.csproj
+++ b/sdk/src/Services/DataSync/AWSSDK.DataSync.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);BCL;AWS_ASYNC_API;CODE_ANALYSIS</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(RuleSetFileForBuild)' == 'false' Or '$(RuleSetFileForBuild)' == '' ">
diff --git a/sdk/src/Services/DataSync/AWSSDK.DataSync.NetStandard.csproj b/sdk/src/Services/DataSync/AWSSDK.DataSync.NetStandard.csproj
index 55a4a3f10b7b..f53d8463acb3 100644
--- a/sdk/src/Services/DataSync/AWSSDK.DataSync.NetStandard.csproj
+++ b/sdk/src/Services/DataSync/AWSSDK.DataSync.NetStandard.csproj
@@ -22,6 +22,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <!-- Async Enumerable Compatibility -->
diff --git a/sdk/src/Services/DataSync/Generated/AmazonDataSyncConfig.cs b/sdk/src/Services/DataSync/Generated/AmazonDataSyncConfig.cs
index c804dff3d411..e8fe4dec416d 100644
--- a/sdk/src/Services/DataSync/Generated/AmazonDataSyncConfig.cs
+++ b/sdk/src/Services/DataSync/Generated/AmazonDataSyncConfig.cs
@@ -34,7 +34,7 @@ namespace Amazon.DataSync
     public partial class AmazonDataSyncConfig : ClientConfig
     {
         private static readonly string UserAgentString =
-            InternalSDKUtils.BuildUserAgentString("DataSync", "3.7.302.3");
+            InternalSDKUtils.BuildUserAgentString("DataSync", "4.0.0.0");
 
         private static readonly AmazonDataSyncEndpointResolver EndpointResolver =
             new AmazonDataSyncEndpointResolver();
diff --git a/sdk/src/Services/DataSync/Properties/AssemblyInfo.cs b/sdk/src/Services/DataSync/Properties/AssemblyInfo.cs
index e266de13c5e3..72779d604ef6 100644
--- a/sdk/src/Services/DataSync/Properties/AssemblyInfo.cs
+++ b/sdk/src/Services/DataSync/Properties/AssemblyInfo.cs
@@ -41,5 +41,9 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.302.3")]
\ No newline at end of file
+#if BCL
+[assembly: AssemblyVersion("4.0")]
+#else
+[assembly: AssemblyVersion("4.0.0.0")]
+#endif
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/src/Services/DataZone/AWSSDK.DataZone.NetFramework.csproj b/sdk/src/Services/DataZone/AWSSDK.DataZone.NetFramework.csproj
index d9c5117fc773..96d2020c2c69 100644
--- a/sdk/src/Services/DataZone/AWSSDK.DataZone.NetFramework.csproj
+++ b/sdk/src/Services/DataZone/AWSSDK.DataZone.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);BCL;AWS_ASYNC_API;CODE_ANALYSIS</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(RuleSetFileForBuild)' == 'false' Or '$(RuleSetFileForBuild)' == '' ">
diff --git a/sdk/src/Services/DataZone/AWSSDK.DataZone.NetStandard.csproj b/sdk/src/Services/DataZone/AWSSDK.DataZone.NetStandard.csproj
index ed0ee3086320..007a2d4df6f7 100644
--- a/sdk/src/Services/DataZone/AWSSDK.DataZone.NetStandard.csproj
+++ b/sdk/src/Services/DataZone/AWSSDK.DataZone.NetStandard.csproj
@@ -22,6 +22,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <!-- Async Enumerable Compatibility -->
diff --git a/sdk/src/Services/DataZone/Generated/AmazonDataZoneConfig.cs b/sdk/src/Services/DataZone/Generated/AmazonDataZoneConfig.cs
index c4ae1211e979..ff66bcf391ef 100644
--- a/sdk/src/Services/DataZone/Generated/AmazonDataZoneConfig.cs
+++ b/sdk/src/Services/DataZone/Generated/AmazonDataZoneConfig.cs
@@ -34,7 +34,7 @@ namespace Amazon.DataZone
     public partial class AmazonDataZoneConfig : ClientConfig
     {
         private static readonly string UserAgentString =
-            InternalSDKUtils.BuildUserAgentString("DataZone", "3.7.303.16");
+            InternalSDKUtils.BuildUserAgentString("DataZone", "4.0.0.0");
 
         private static readonly AmazonDataZoneEndpointResolver EndpointResolver =
             new AmazonDataZoneEndpointResolver();
diff --git a/sdk/src/Services/DataZone/Properties/AssemblyInfo.cs b/sdk/src/Services/DataZone/Properties/AssemblyInfo.cs
index 43677b9e55a8..1b652be74471 100644
--- a/sdk/src/Services/DataZone/Properties/AssemblyInfo.cs
+++ b/sdk/src/Services/DataZone/Properties/AssemblyInfo.cs
@@ -41,5 +41,9 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.303.16")]
\ No newline at end of file
+#if BCL
+[assembly: AssemblyVersion("4.0")]
+#else
+[assembly: AssemblyVersion("4.0.0.0")]
+#endif
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/src/Services/DatabaseMigrationService/AWSSDK.DatabaseMigrationService.NetFramework.csproj b/sdk/src/Services/DatabaseMigrationService/AWSSDK.DatabaseMigrationService.NetFramework.csproj
index e9008f539025..649f81172b83 100644
--- a/sdk/src/Services/DatabaseMigrationService/AWSSDK.DatabaseMigrationService.NetFramework.csproj
+++ b/sdk/src/Services/DatabaseMigrationService/AWSSDK.DatabaseMigrationService.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);BCL;AWS_ASYNC_API;CODE_ANALYSIS</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(RuleSetFileForBuild)' == 'false' Or '$(RuleSetFileForBuild)' == '' ">
diff --git a/sdk/src/Services/DatabaseMigrationService/AWSSDK.DatabaseMigrationService.NetStandard.csproj b/sdk/src/Services/DatabaseMigrationService/AWSSDK.DatabaseMigrationService.NetStandard.csproj
index f98dfee343c4..3c41d4e4234b 100644
--- a/sdk/src/Services/DatabaseMigrationService/AWSSDK.DatabaseMigrationService.NetStandard.csproj
+++ b/sdk/src/Services/DatabaseMigrationService/AWSSDK.DatabaseMigrationService.NetStandard.csproj
@@ -22,6 +22,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <!-- Async Enumerable Compatibility -->
diff --git a/sdk/src/Services/DatabaseMigrationService/Generated/AmazonDatabaseMigrationServiceConfig.cs b/sdk/src/Services/DatabaseMigrationService/Generated/AmazonDatabaseMigrationServiceConfig.cs
index dfe68fdfd526..b4339639a5b9 100644
--- a/sdk/src/Services/DatabaseMigrationService/Generated/AmazonDatabaseMigrationServiceConfig.cs
+++ b/sdk/src/Services/DatabaseMigrationService/Generated/AmazonDatabaseMigrationServiceConfig.cs
@@ -34,7 +34,7 @@ namespace Amazon.DatabaseMigrationService
     public partial class AmazonDatabaseMigrationServiceConfig : ClientConfig
     {
         private static readonly string UserAgentString =
-            InternalSDKUtils.BuildUserAgentString("Database Migration Service", "3.7.301.83");
+            InternalSDKUtils.BuildUserAgentString("Database Migration Service", "4.0.0.0");
 
         private static readonly AmazonDatabaseMigrationServiceEndpointResolver EndpointResolver =
             new AmazonDatabaseMigrationServiceEndpointResolver();
diff --git a/sdk/src/Services/DatabaseMigrationService/Properties/AssemblyInfo.cs b/sdk/src/Services/DatabaseMigrationService/Properties/AssemblyInfo.cs
index b9228f846da6..c9a79e2e2b66 100644
--- a/sdk/src/Services/DatabaseMigrationService/Properties/AssemblyInfo.cs
+++ b/sdk/src/Services/DatabaseMigrationService/Properties/AssemblyInfo.cs
@@ -41,5 +41,9 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.301.83")]
\ No newline at end of file
+#if BCL
+[assembly: AssemblyVersion("4.0")]
+#else
+[assembly: AssemblyVersion("4.0.0.0")]
+#endif
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/src/Services/Deadline/AWSSDK.Deadline.NetFramework.csproj b/sdk/src/Services/Deadline/AWSSDK.Deadline.NetFramework.csproj
index c56c20b501b0..b8519cee114e 100644
--- a/sdk/src/Services/Deadline/AWSSDK.Deadline.NetFramework.csproj
+++ b/sdk/src/Services/Deadline/AWSSDK.Deadline.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);BCL;AWS_ASYNC_API;CODE_ANALYSIS</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(RuleSetFileForBuild)' == 'false' Or '$(RuleSetFileForBuild)' == '' ">
diff --git a/sdk/src/Services/Deadline/AWSSDK.Deadline.NetStandard.csproj b/sdk/src/Services/Deadline/AWSSDK.Deadline.NetStandard.csproj
index 92be860b2457..999557f9a37d 100644
--- a/sdk/src/Services/Deadline/AWSSDK.Deadline.NetStandard.csproj
+++ b/sdk/src/Services/Deadline/AWSSDK.Deadline.NetStandard.csproj
@@ -22,6 +22,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <!-- Async Enumerable Compatibility -->
diff --git a/sdk/src/Services/Deadline/Generated/AmazonDeadlineConfig.cs b/sdk/src/Services/Deadline/Generated/AmazonDeadlineConfig.cs
index 2e4e43ea60bd..616e2b4107d7 100644
--- a/sdk/src/Services/Deadline/Generated/AmazonDeadlineConfig.cs
+++ b/sdk/src/Services/Deadline/Generated/AmazonDeadlineConfig.cs
@@ -34,7 +34,7 @@ namespace Amazon.Deadline
     public partial class AmazonDeadlineConfig : ClientConfig
     {
         private static readonly string UserAgentString =
-            InternalSDKUtils.BuildUserAgentString("deadline", "3.7.300.18");
+            InternalSDKUtils.BuildUserAgentString("deadline", "4.0.0.0");
 
         private static readonly AmazonDeadlineEndpointResolver EndpointResolver =
             new AmazonDeadlineEndpointResolver();
diff --git a/sdk/src/Services/Deadline/Properties/AssemblyInfo.cs b/sdk/src/Services/Deadline/Properties/AssemblyInfo.cs
index 3623a0f03c11..460130a95ead 100644
--- a/sdk/src/Services/Deadline/Properties/AssemblyInfo.cs
+++ b/sdk/src/Services/Deadline/Properties/AssemblyInfo.cs
@@ -41,5 +41,9 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.300.18")]
\ No newline at end of file
+#if BCL
+[assembly: AssemblyVersion("4.0")]
+#else
+[assembly: AssemblyVersion("4.0.0.0")]
+#endif
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/src/Services/Detective/AWSSDK.Detective.NetFramework.csproj b/sdk/src/Services/Detective/AWSSDK.Detective.NetFramework.csproj
index 25a403bfc79a..10ade206a1d8 100644
--- a/sdk/src/Services/Detective/AWSSDK.Detective.NetFramework.csproj
+++ b/sdk/src/Services/Detective/AWSSDK.Detective.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);BCL;AWS_ASYNC_API;CODE_ANALYSIS</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(RuleSetFileForBuild)' == 'false' Or '$(RuleSetFileForBuild)' == '' ">
diff --git a/sdk/src/Services/Detective/AWSSDK.Detective.NetStandard.csproj b/sdk/src/Services/Detective/AWSSDK.Detective.NetStandard.csproj
index 115b1e29febe..a869ff023982 100644
--- a/sdk/src/Services/Detective/AWSSDK.Detective.NetStandard.csproj
+++ b/sdk/src/Services/Detective/AWSSDK.Detective.NetStandard.csproj
@@ -22,6 +22,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <!-- Async Enumerable Compatibility -->
diff --git a/sdk/src/Services/Detective/Generated/AmazonDetectiveConfig.cs b/sdk/src/Services/Detective/Generated/AmazonDetectiveConfig.cs
index 03bda0e7cdcb..9e10e0f25a86 100644
--- a/sdk/src/Services/Detective/Generated/AmazonDetectiveConfig.cs
+++ b/sdk/src/Services/Detective/Generated/AmazonDetectiveConfig.cs
@@ -34,7 +34,7 @@ namespace Amazon.Detective
     public partial class AmazonDetectiveConfig : ClientConfig
     {
         private static readonly string UserAgentString =
-            InternalSDKUtils.BuildUserAgentString("Detective", "3.7.301.76");
+            InternalSDKUtils.BuildUserAgentString("Detective", "4.0.0.0");
 
         private static readonly AmazonDetectiveEndpointResolver EndpointResolver =
             new AmazonDetectiveEndpointResolver();
diff --git a/sdk/src/Services/Detective/Properties/AssemblyInfo.cs b/sdk/src/Services/Detective/Properties/AssemblyInfo.cs
index 2ff32d7b1b4f..55726af44a76 100644
--- a/sdk/src/Services/Detective/Properties/AssemblyInfo.cs
+++ b/sdk/src/Services/Detective/Properties/AssemblyInfo.cs
@@ -41,5 +41,9 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.301.76")]
\ No newline at end of file
+#if BCL
+[assembly: AssemblyVersion("4.0")]
+#else
+[assembly: AssemblyVersion("4.0.0.0")]
+#endif
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/src/Services/DevOpsGuru/AWSSDK.DevOpsGuru.NetFramework.csproj b/sdk/src/Services/DevOpsGuru/AWSSDK.DevOpsGuru.NetFramework.csproj
index 76010d6e5efb..d459553595a5 100644
--- a/sdk/src/Services/DevOpsGuru/AWSSDK.DevOpsGuru.NetFramework.csproj
+++ b/sdk/src/Services/DevOpsGuru/AWSSDK.DevOpsGuru.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);BCL;AWS_ASYNC_API;CODE_ANALYSIS</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(RuleSetFileForBuild)' == 'false' Or '$(RuleSetFileForBuild)' == '' ">
diff --git a/sdk/src/Services/DevOpsGuru/AWSSDK.DevOpsGuru.NetStandard.csproj b/sdk/src/Services/DevOpsGuru/AWSSDK.DevOpsGuru.NetStandard.csproj
index 703c7effb6f4..bbd9fcf666a8 100644
--- a/sdk/src/Services/DevOpsGuru/AWSSDK.DevOpsGuru.NetStandard.csproj
+++ b/sdk/src/Services/DevOpsGuru/AWSSDK.DevOpsGuru.NetStandard.csproj
@@ -22,6 +22,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <!-- Async Enumerable Compatibility -->
diff --git a/sdk/src/Services/DevOpsGuru/Generated/AmazonDevOpsGuruConfig.cs b/sdk/src/Services/DevOpsGuru/Generated/AmazonDevOpsGuruConfig.cs
index f1c08f418526..dd96da8b4bc3 100644
--- a/sdk/src/Services/DevOpsGuru/Generated/AmazonDevOpsGuruConfig.cs
+++ b/sdk/src/Services/DevOpsGuru/Generated/AmazonDevOpsGuruConfig.cs
@@ -34,7 +34,7 @@ namespace Amazon.DevOpsGuru
     public partial class AmazonDevOpsGuruConfig : ClientConfig
     {
         private static readonly string UserAgentString =
-            InternalSDKUtils.BuildUserAgentString("DevOps Guru", "3.7.300.84");
+            InternalSDKUtils.BuildUserAgentString("DevOps Guru", "4.0.0.0");
 
         private static readonly AmazonDevOpsGuruEndpointResolver EndpointResolver =
             new AmazonDevOpsGuruEndpointResolver();
diff --git a/sdk/src/Services/DevOpsGuru/Properties/AssemblyInfo.cs b/sdk/src/Services/DevOpsGuru/Properties/AssemblyInfo.cs
index 0c714b9c160f..2c56cee12e3e 100644
--- a/sdk/src/Services/DevOpsGuru/Properties/AssemblyInfo.cs
+++ b/sdk/src/Services/DevOpsGuru/Properties/AssemblyInfo.cs
@@ -41,5 +41,9 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.300.84")]
\ No newline at end of file
+#if BCL
+[assembly: AssemblyVersion("4.0")]
+#else
+[assembly: AssemblyVersion("4.0.0.0")]
+#endif
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/src/Services/DeviceFarm/AWSSDK.DeviceFarm.NetFramework.csproj b/sdk/src/Services/DeviceFarm/AWSSDK.DeviceFarm.NetFramework.csproj
index c4caa5e7e854..3746508b8aab 100644
--- a/sdk/src/Services/DeviceFarm/AWSSDK.DeviceFarm.NetFramework.csproj
+++ b/sdk/src/Services/DeviceFarm/AWSSDK.DeviceFarm.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);BCL;AWS_ASYNC_API;CODE_ANALYSIS</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(RuleSetFileForBuild)' == 'false' Or '$(RuleSetFileForBuild)' == '' ">
diff --git a/sdk/src/Services/DeviceFarm/AWSSDK.DeviceFarm.NetStandard.csproj b/sdk/src/Services/DeviceFarm/AWSSDK.DeviceFarm.NetStandard.csproj
index cea6008e4f45..8a36ffbf5fdc 100644
--- a/sdk/src/Services/DeviceFarm/AWSSDK.DeviceFarm.NetStandard.csproj
+++ b/sdk/src/Services/DeviceFarm/AWSSDK.DeviceFarm.NetStandard.csproj
@@ -22,6 +22,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <!-- Async Enumerable Compatibility -->
diff --git a/sdk/src/Services/DeviceFarm/Generated/AmazonDeviceFarmConfig.cs b/sdk/src/Services/DeviceFarm/Generated/AmazonDeviceFarmConfig.cs
index 032095f739cc..24490e0d199f 100644
--- a/sdk/src/Services/DeviceFarm/Generated/AmazonDeviceFarmConfig.cs
+++ b/sdk/src/Services/DeviceFarm/Generated/AmazonDeviceFarmConfig.cs
@@ -34,7 +34,7 @@ namespace Amazon.DeviceFarm
     public partial class AmazonDeviceFarmConfig : ClientConfig
     {
         private static readonly string UserAgentString =
-            InternalSDKUtils.BuildUserAgentString("Device Farm", "3.7.300.84");
+            InternalSDKUtils.BuildUserAgentString("Device Farm", "4.0.0.0");
 
         private static readonly AmazonDeviceFarmEndpointResolver EndpointResolver =
             new AmazonDeviceFarmEndpointResolver();
diff --git a/sdk/src/Services/DeviceFarm/Properties/AssemblyInfo.cs b/sdk/src/Services/DeviceFarm/Properties/AssemblyInfo.cs
index dc2a069538f7..47e975ec5a51 100644
--- a/sdk/src/Services/DeviceFarm/Properties/AssemblyInfo.cs
+++ b/sdk/src/Services/DeviceFarm/Properties/AssemblyInfo.cs
@@ -41,5 +41,9 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.300.84")]
\ No newline at end of file
+#if BCL
+[assembly: AssemblyVersion("4.0")]
+#else
+[assembly: AssemblyVersion("4.0.0.0")]
+#endif
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/src/Services/DirectConnect/AWSSDK.DirectConnect.NetFramework.csproj b/sdk/src/Services/DirectConnect/AWSSDK.DirectConnect.NetFramework.csproj
index fc578164d4b6..a0f730bc6c9c 100644
--- a/sdk/src/Services/DirectConnect/AWSSDK.DirectConnect.NetFramework.csproj
+++ b/sdk/src/Services/DirectConnect/AWSSDK.DirectConnect.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);BCL;AWS_ASYNC_API;CODE_ANALYSIS</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(RuleSetFileForBuild)' == 'false' Or '$(RuleSetFileForBuild)' == '' ">
diff --git a/sdk/src/Services/DirectConnect/AWSSDK.DirectConnect.NetStandard.csproj b/sdk/src/Services/DirectConnect/AWSSDK.DirectConnect.NetStandard.csproj
index da44c553d182..264c305ea8f2 100644
--- a/sdk/src/Services/DirectConnect/AWSSDK.DirectConnect.NetStandard.csproj
+++ b/sdk/src/Services/DirectConnect/AWSSDK.DirectConnect.NetStandard.csproj
@@ -22,6 +22,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <!-- Async Enumerable Compatibility -->
diff --git a/sdk/src/Services/DirectConnect/Generated/AmazonDirectConnectConfig.cs b/sdk/src/Services/DirectConnect/Generated/AmazonDirectConnectConfig.cs
index 8ebf777fbeec..f6b4a93c9dbb 100644
--- a/sdk/src/Services/DirectConnect/Generated/AmazonDirectConnectConfig.cs
+++ b/sdk/src/Services/DirectConnect/Generated/AmazonDirectConnectConfig.cs
@@ -34,7 +34,7 @@ namespace Amazon.DirectConnect
     public partial class AmazonDirectConnectConfig : ClientConfig
     {
         private static readonly string UserAgentString =
-            InternalSDKUtils.BuildUserAgentString("Direct Connect", "3.7.300.84");
+            InternalSDKUtils.BuildUserAgentString("Direct Connect", "4.0.0.0");
 
         private static readonly AmazonDirectConnectEndpointResolver EndpointResolver =
             new AmazonDirectConnectEndpointResolver();
diff --git a/sdk/src/Services/DirectConnect/Properties/AssemblyInfo.cs b/sdk/src/Services/DirectConnect/Properties/AssemblyInfo.cs
index a5e80b4ba62c..b929893bdcc8 100644
--- a/sdk/src/Services/DirectConnect/Properties/AssemblyInfo.cs
+++ b/sdk/src/Services/DirectConnect/Properties/AssemblyInfo.cs
@@ -41,5 +41,9 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.300.84")]
\ No newline at end of file
+#if BCL
+[assembly: AssemblyVersion("4.0")]
+#else
+[assembly: AssemblyVersion("4.0.0.0")]
+#endif
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/src/Services/DirectoryService/AWSSDK.DirectoryService.NetFramework.csproj b/sdk/src/Services/DirectoryService/AWSSDK.DirectoryService.NetFramework.csproj
index 51abf687f11f..9ba715b88e36 100644
--- a/sdk/src/Services/DirectoryService/AWSSDK.DirectoryService.NetFramework.csproj
+++ b/sdk/src/Services/DirectoryService/AWSSDK.DirectoryService.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);BCL;AWS_ASYNC_API;CODE_ANALYSIS</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(RuleSetFileForBuild)' == 'false' Or '$(RuleSetFileForBuild)' == '' ">
diff --git a/sdk/src/Services/DirectoryService/AWSSDK.DirectoryService.NetStandard.csproj b/sdk/src/Services/DirectoryService/AWSSDK.DirectoryService.NetStandard.csproj
index 1aa08be8c7b9..5ac27d47597c 100644
--- a/sdk/src/Services/DirectoryService/AWSSDK.DirectoryService.NetStandard.csproj
+++ b/sdk/src/Services/DirectoryService/AWSSDK.DirectoryService.NetStandard.csproj
@@ -22,6 +22,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <!-- Async Enumerable Compatibility -->
diff --git a/sdk/src/Services/DirectoryService/Generated/AmazonDirectoryServiceConfig.cs b/sdk/src/Services/DirectoryService/Generated/AmazonDirectoryServiceConfig.cs
index ba54866e71a4..8ea9d77710bf 100644
--- a/sdk/src/Services/DirectoryService/Generated/AmazonDirectoryServiceConfig.cs
+++ b/sdk/src/Services/DirectoryService/Generated/AmazonDirectoryServiceConfig.cs
@@ -34,7 +34,7 @@ namespace Amazon.DirectoryService
     public partial class AmazonDirectoryServiceConfig : ClientConfig
     {
         private static readonly string UserAgentString =
-            InternalSDKUtils.BuildUserAgentString("Directory Service", "3.7.300.84");
+            InternalSDKUtils.BuildUserAgentString("Directory Service", "4.0.0.0");
 
         private static readonly AmazonDirectoryServiceEndpointResolver EndpointResolver =
             new AmazonDirectoryServiceEndpointResolver();
diff --git a/sdk/src/Services/DirectoryService/Properties/AssemblyInfo.cs b/sdk/src/Services/DirectoryService/Properties/AssemblyInfo.cs
index c2abfe1b6dca..abd4aa79f089 100644
--- a/sdk/src/Services/DirectoryService/Properties/AssemblyInfo.cs
+++ b/sdk/src/Services/DirectoryService/Properties/AssemblyInfo.cs
@@ -41,5 +41,9 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.300.84")]
\ No newline at end of file
+#if BCL
+[assembly: AssemblyVersion("4.0")]
+#else
+[assembly: AssemblyVersion("4.0.0.0")]
+#endif
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/src/Services/DocDB/AWSSDK.DocDB.NetFramework.csproj b/sdk/src/Services/DocDB/AWSSDK.DocDB.NetFramework.csproj
index 7b4e4cfa1a84..ec7106e0f3cd 100644
--- a/sdk/src/Services/DocDB/AWSSDK.DocDB.NetFramework.csproj
+++ b/sdk/src/Services/DocDB/AWSSDK.DocDB.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);BCL;AWS_ASYNC_API;CODE_ANALYSIS</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(RuleSetFileForBuild)' == 'false' Or '$(RuleSetFileForBuild)' == '' ">
diff --git a/sdk/src/Services/DocDB/AWSSDK.DocDB.NetStandard.csproj b/sdk/src/Services/DocDB/AWSSDK.DocDB.NetStandard.csproj
index 0b648bfa5e2f..1b69d276d411 100644
--- a/sdk/src/Services/DocDB/AWSSDK.DocDB.NetStandard.csproj
+++ b/sdk/src/Services/DocDB/AWSSDK.DocDB.NetStandard.csproj
@@ -22,6 +22,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <!-- Async Enumerable Compatibility -->
diff --git a/sdk/src/Services/DocDB/Generated/AmazonDocDBConfig.cs b/sdk/src/Services/DocDB/Generated/AmazonDocDBConfig.cs
index 067f68ed750e..ef1ca8513d8f 100644
--- a/sdk/src/Services/DocDB/Generated/AmazonDocDBConfig.cs
+++ b/sdk/src/Services/DocDB/Generated/AmazonDocDBConfig.cs
@@ -34,7 +34,7 @@ namespace Amazon.DocDB
     public partial class AmazonDocDBConfig : ClientConfig
     {
         private static readonly string UserAgentString =
-            InternalSDKUtils.BuildUserAgentString("DocDB", "3.7.303.16");
+            InternalSDKUtils.BuildUserAgentString("DocDB", "4.0.0.0");
 
         private static readonly AmazonDocDBEndpointResolver EndpointResolver =
             new AmazonDocDBEndpointResolver();
diff --git a/sdk/src/Services/DocDB/Properties/AssemblyInfo.cs b/sdk/src/Services/DocDB/Properties/AssemblyInfo.cs
index 6bda0ff7f76e..b9d1d46c7c2b 100644
--- a/sdk/src/Services/DocDB/Properties/AssemblyInfo.cs
+++ b/sdk/src/Services/DocDB/Properties/AssemblyInfo.cs
@@ -41,5 +41,9 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.303.16")]
\ No newline at end of file
+#if BCL
+[assembly: AssemblyVersion("4.0")]
+#else
+[assembly: AssemblyVersion("4.0.0.0")]
+#endif
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/src/Services/DocDBElastic/AWSSDK.DocDBElastic.NetFramework.csproj b/sdk/src/Services/DocDBElastic/AWSSDK.DocDBElastic.NetFramework.csproj
index a46b56dece3f..32dc8ff553bf 100644
--- a/sdk/src/Services/DocDBElastic/AWSSDK.DocDBElastic.NetFramework.csproj
+++ b/sdk/src/Services/DocDBElastic/AWSSDK.DocDBElastic.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);BCL;AWS_ASYNC_API;CODE_ANALYSIS</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(RuleSetFileForBuild)' == 'false' Or '$(RuleSetFileForBuild)' == '' ">
diff --git a/sdk/src/Services/DocDBElastic/AWSSDK.DocDBElastic.NetStandard.csproj b/sdk/src/Services/DocDBElastic/AWSSDK.DocDBElastic.NetStandard.csproj
index 6c39f50f28a4..5b7e5a67315b 100644
--- a/sdk/src/Services/DocDBElastic/AWSSDK.DocDBElastic.NetStandard.csproj
+++ b/sdk/src/Services/DocDBElastic/AWSSDK.DocDBElastic.NetStandard.csproj
@@ -22,6 +22,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <!-- Async Enumerable Compatibility -->
diff --git a/sdk/src/Services/DocDBElastic/Generated/AmazonDocDBElasticConfig.cs b/sdk/src/Services/DocDBElastic/Generated/AmazonDocDBElasticConfig.cs
index 0929d67ab46e..9205da353284 100644
--- a/sdk/src/Services/DocDBElastic/Generated/AmazonDocDBElasticConfig.cs
+++ b/sdk/src/Services/DocDBElastic/Generated/AmazonDocDBElasticConfig.cs
@@ -34,7 +34,7 @@ namespace Amazon.DocDBElastic
     public partial class AmazonDocDBElasticConfig : ClientConfig
     {
         private static readonly string UserAgentString =
-            InternalSDKUtils.BuildUserAgentString("DocDB Elastic", "3.7.301.30");
+            InternalSDKUtils.BuildUserAgentString("DocDB Elastic", "4.0.0.0");
 
         private static readonly AmazonDocDBElasticEndpointResolver EndpointResolver =
             new AmazonDocDBElasticEndpointResolver();
diff --git a/sdk/src/Services/DocDBElastic/Properties/AssemblyInfo.cs b/sdk/src/Services/DocDBElastic/Properties/AssemblyInfo.cs
index 61e0412a2d34..c9c154274353 100644
--- a/sdk/src/Services/DocDBElastic/Properties/AssemblyInfo.cs
+++ b/sdk/src/Services/DocDBElastic/Properties/AssemblyInfo.cs
@@ -41,5 +41,9 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.301.30")]
\ No newline at end of file
+#if BCL
+[assembly: AssemblyVersion("4.0")]
+#else
+[assembly: AssemblyVersion("4.0.0.0")]
+#endif
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/src/Services/Drs/AWSSDK.Drs.NetFramework.csproj b/sdk/src/Services/Drs/AWSSDK.Drs.NetFramework.csproj
index 1f0b2e5ce427..8593296c112b 100644
--- a/sdk/src/Services/Drs/AWSSDK.Drs.NetFramework.csproj
+++ b/sdk/src/Services/Drs/AWSSDK.Drs.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);BCL;AWS_ASYNC_API;CODE_ANALYSIS</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(RuleSetFileForBuild)' == 'false' Or '$(RuleSetFileForBuild)' == '' ">
diff --git a/sdk/src/Services/Drs/AWSSDK.Drs.NetStandard.csproj b/sdk/src/Services/Drs/AWSSDK.Drs.NetStandard.csproj
index aba260c215ab..bc7f4888fba5 100644
--- a/sdk/src/Services/Drs/AWSSDK.Drs.NetStandard.csproj
+++ b/sdk/src/Services/Drs/AWSSDK.Drs.NetStandard.csproj
@@ -22,6 +22,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <!-- Async Enumerable Compatibility -->
diff --git a/sdk/src/Services/Drs/Generated/AmazonDrsConfig.cs b/sdk/src/Services/Drs/Generated/AmazonDrsConfig.cs
index e94105b1d3e4..ae2287eab0d5 100644
--- a/sdk/src/Services/Drs/Generated/AmazonDrsConfig.cs
+++ b/sdk/src/Services/Drs/Generated/AmazonDrsConfig.cs
@@ -34,7 +34,7 @@ namespace Amazon.Drs
     public partial class AmazonDrsConfig : ClientConfig
     {
         private static readonly string UserAgentString =
-            InternalSDKUtils.BuildUserAgentString("drs", "3.7.304.7");
+            InternalSDKUtils.BuildUserAgentString("drs", "4.0.0.0");
 
         private static readonly AmazonDrsEndpointResolver EndpointResolver =
             new AmazonDrsEndpointResolver();
diff --git a/sdk/src/Services/Drs/Properties/AssemblyInfo.cs b/sdk/src/Services/Drs/Properties/AssemblyInfo.cs
index ecd9b3d1a18a..3d501a208a8d 100644
--- a/sdk/src/Services/Drs/Properties/AssemblyInfo.cs
+++ b/sdk/src/Services/Drs/Properties/AssemblyInfo.cs
@@ -41,5 +41,9 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.304.7")]
\ No newline at end of file
+#if BCL
+[assembly: AssemblyVersion("4.0")]
+#else
+[assembly: AssemblyVersion("4.0.0.0")]
+#endif
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/src/Services/DynamoDBv2/AWSSDK.DynamoDBv2.NetFramework.csproj b/sdk/src/Services/DynamoDBv2/AWSSDK.DynamoDBv2.NetFramework.csproj
index 8b58bd2797ef..8d37c1b9929b 100644
--- a/sdk/src/Services/DynamoDBv2/AWSSDK.DynamoDBv2.NetFramework.csproj
+++ b/sdk/src/Services/DynamoDBv2/AWSSDK.DynamoDBv2.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);BCL;AWS_ASYNC_API;CODE_ANALYSIS</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(RuleSetFileForBuild)' == 'false' Or '$(RuleSetFileForBuild)' == '' ">
diff --git a/sdk/src/Services/DynamoDBv2/AWSSDK.DynamoDBv2.NetStandard.csproj b/sdk/src/Services/DynamoDBv2/AWSSDK.DynamoDBv2.NetStandard.csproj
index dc7f756df409..e2d2b0a2bce9 100644
--- a/sdk/src/Services/DynamoDBv2/AWSSDK.DynamoDBv2.NetStandard.csproj
+++ b/sdk/src/Services/DynamoDBv2/AWSSDK.DynamoDBv2.NetStandard.csproj
@@ -22,6 +22,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <!-- Async Enumerable Compatibility -->
diff --git a/sdk/src/Services/DynamoDBv2/Generated/AmazonDynamoDBConfig.cs b/sdk/src/Services/DynamoDBv2/Generated/AmazonDynamoDBConfig.cs
index 49f53e9f6daa..30deed75d69d 100644
--- a/sdk/src/Services/DynamoDBv2/Generated/AmazonDynamoDBConfig.cs
+++ b/sdk/src/Services/DynamoDBv2/Generated/AmazonDynamoDBConfig.cs
@@ -34,7 +34,7 @@ namespace Amazon.DynamoDBv2
     public partial class AmazonDynamoDBConfig : ClientConfig
     {
         private static readonly string UserAgentString =
-            InternalSDKUtils.BuildUserAgentString("DynamoDB", "3.7.302.25");
+            InternalSDKUtils.BuildUserAgentString("DynamoDB", "4.0.0.0");
 
         private static readonly AmazonDynamoDBEndpointResolver EndpointResolver =
             new AmazonDynamoDBEndpointResolver();
diff --git a/sdk/src/Services/DynamoDBv2/Generated/AmazonDynamoDBStreamsConfig.cs b/sdk/src/Services/DynamoDBv2/Generated/AmazonDynamoDBStreamsConfig.cs
index 6e94a6c46fa0..66a47a5f6d1e 100644
--- a/sdk/src/Services/DynamoDBv2/Generated/AmazonDynamoDBStreamsConfig.cs
+++ b/sdk/src/Services/DynamoDBv2/Generated/AmazonDynamoDBStreamsConfig.cs
@@ -34,7 +34,7 @@ namespace Amazon.DynamoDBv2
     public partial class AmazonDynamoDBStreamsConfig : ClientConfig
     {
         private static readonly string UserAgentString =
-            InternalSDKUtils.BuildUserAgentString("DynamoDB Streams", "3.7.302.25");
+            InternalSDKUtils.BuildUserAgentString("DynamoDB Streams", "4.0.0.0");
 
         private static readonly AmazonDynamoDBStreamsEndpointResolver EndpointResolver =
             new AmazonDynamoDBStreamsEndpointResolver();
diff --git a/sdk/src/Services/DynamoDBv2/Properties/AssemblyInfo.cs b/sdk/src/Services/DynamoDBv2/Properties/AssemblyInfo.cs
index 028601e9e106..3113fe49f414 100644
--- a/sdk/src/Services/DynamoDBv2/Properties/AssemblyInfo.cs
+++ b/sdk/src/Services/DynamoDBv2/Properties/AssemblyInfo.cs
@@ -41,5 +41,9 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.302.25")]
\ No newline at end of file
+#if BCL
+[assembly: AssemblyVersion("4.0")]
+#else
+[assembly: AssemblyVersion("4.0.0.0")]
+#endif
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/src/Services/EBS/AWSSDK.EBS.NetFramework.csproj b/sdk/src/Services/EBS/AWSSDK.EBS.NetFramework.csproj
index dd10d2427f05..4de87a3bb80b 100644
--- a/sdk/src/Services/EBS/AWSSDK.EBS.NetFramework.csproj
+++ b/sdk/src/Services/EBS/AWSSDK.EBS.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);BCL;AWS_ASYNC_API;CODE_ANALYSIS</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(RuleSetFileForBuild)' == 'false' Or '$(RuleSetFileForBuild)' == '' ">
diff --git a/sdk/src/Services/EBS/AWSSDK.EBS.NetStandard.csproj b/sdk/src/Services/EBS/AWSSDK.EBS.NetStandard.csproj
index 0c0191ff3cc4..cc8456569ac3 100644
--- a/sdk/src/Services/EBS/AWSSDK.EBS.NetStandard.csproj
+++ b/sdk/src/Services/EBS/AWSSDK.EBS.NetStandard.csproj
@@ -22,6 +22,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <!-- Async Enumerable Compatibility -->
diff --git a/sdk/src/Services/EBS/Generated/AmazonEBSConfig.cs b/sdk/src/Services/EBS/Generated/AmazonEBSConfig.cs
index c50c4e628439..35315769bc6f 100644
--- a/sdk/src/Services/EBS/Generated/AmazonEBSConfig.cs
+++ b/sdk/src/Services/EBS/Generated/AmazonEBSConfig.cs
@@ -34,7 +34,7 @@ namespace Amazon.EBS
     public partial class AmazonEBSConfig : ClientConfig
     {
         private static readonly string UserAgentString =
-            InternalSDKUtils.BuildUserAgentString("EBS", "3.7.300.84");
+            InternalSDKUtils.BuildUserAgentString("EBS", "4.0.0.0");
 
         private static readonly AmazonEBSEndpointResolver EndpointResolver =
             new AmazonEBSEndpointResolver();
diff --git a/sdk/src/Services/EBS/Properties/AssemblyInfo.cs b/sdk/src/Services/EBS/Properties/AssemblyInfo.cs
index 341e92ef5ea3..3f3ab2b1ab0c 100644
--- a/sdk/src/Services/EBS/Properties/AssemblyInfo.cs
+++ b/sdk/src/Services/EBS/Properties/AssemblyInfo.cs
@@ -41,5 +41,9 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.300.84")]
\ No newline at end of file
+#if BCL
+[assembly: AssemblyVersion("4.0")]
+#else
+[assembly: AssemblyVersion("4.0.0.0")]
+#endif
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/src/Services/EC2/AWSSDK.EC2.NetFramework.csproj b/sdk/src/Services/EC2/AWSSDK.EC2.NetFramework.csproj
index 1bdbc9f77469..adb09b0f1985 100644
--- a/sdk/src/Services/EC2/AWSSDK.EC2.NetFramework.csproj
+++ b/sdk/src/Services/EC2/AWSSDK.EC2.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);BCL;AWS_ASYNC_API;CODE_ANALYSIS</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(RuleSetFileForBuild)' == 'false' Or '$(RuleSetFileForBuild)' == '' ">
diff --git a/sdk/src/Services/EC2/AWSSDK.EC2.NetStandard.csproj b/sdk/src/Services/EC2/AWSSDK.EC2.NetStandard.csproj
index 966b784a5617..f1336cb96669 100644
--- a/sdk/src/Services/EC2/AWSSDK.EC2.NetStandard.csproj
+++ b/sdk/src/Services/EC2/AWSSDK.EC2.NetStandard.csproj
@@ -22,6 +22,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <!-- Async Enumerable Compatibility -->
diff --git a/sdk/src/Services/EC2/Generated/AmazonEC2Config.cs b/sdk/src/Services/EC2/Generated/AmazonEC2Config.cs
index fef7809159d4..58997eb3b95a 100644
--- a/sdk/src/Services/EC2/Generated/AmazonEC2Config.cs
+++ b/sdk/src/Services/EC2/Generated/AmazonEC2Config.cs
@@ -34,7 +34,7 @@ namespace Amazon.EC2
     public partial class AmazonEC2Config : ClientConfig
     {
         private static readonly string UserAgentString =
-            InternalSDKUtils.BuildUserAgentString("EC2", "3.7.325.3");
+            InternalSDKUtils.BuildUserAgentString("EC2", "4.0.0.0");
 
         private static readonly AmazonEC2EndpointResolver EndpointResolver =
             new AmazonEC2EndpointResolver();
diff --git a/sdk/src/Services/EC2/Properties/AssemblyInfo.cs b/sdk/src/Services/EC2/Properties/AssemblyInfo.cs
index aeac5332c722..91f4f96a2642 100644
--- a/sdk/src/Services/EC2/Properties/AssemblyInfo.cs
+++ b/sdk/src/Services/EC2/Properties/AssemblyInfo.cs
@@ -41,5 +41,9 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.325.3")]
\ No newline at end of file
+#if BCL
+[assembly: AssemblyVersion("4.0")]
+#else
+[assembly: AssemblyVersion("4.0.0.0")]
+#endif
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/src/Services/EC2InstanceConnect/AWSSDK.EC2InstanceConnect.NetFramework.csproj b/sdk/src/Services/EC2InstanceConnect/AWSSDK.EC2InstanceConnect.NetFramework.csproj
index 6d28f3e55ec8..02a595e8da2f 100644
--- a/sdk/src/Services/EC2InstanceConnect/AWSSDK.EC2InstanceConnect.NetFramework.csproj
+++ b/sdk/src/Services/EC2InstanceConnect/AWSSDK.EC2InstanceConnect.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);BCL;AWS_ASYNC_API;CODE_ANALYSIS</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(RuleSetFileForBuild)' == 'false' Or '$(RuleSetFileForBuild)' == '' ">
diff --git a/sdk/src/Services/EC2InstanceConnect/AWSSDK.EC2InstanceConnect.NetStandard.csproj b/sdk/src/Services/EC2InstanceConnect/AWSSDK.EC2InstanceConnect.NetStandard.csproj
index 67df4e4e95e5..f29a210aadab 100644
--- a/sdk/src/Services/EC2InstanceConnect/AWSSDK.EC2InstanceConnect.NetStandard.csproj
+++ b/sdk/src/Services/EC2InstanceConnect/AWSSDK.EC2InstanceConnect.NetStandard.csproj
@@ -22,6 +22,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <!-- Async Enumerable Compatibility -->
diff --git a/sdk/src/Services/EC2InstanceConnect/Generated/AmazonEC2InstanceConnectConfig.cs b/sdk/src/Services/EC2InstanceConnect/Generated/AmazonEC2InstanceConnectConfig.cs
index e264fe0a860a..eb66f7b71501 100644
--- a/sdk/src/Services/EC2InstanceConnect/Generated/AmazonEC2InstanceConnectConfig.cs
+++ b/sdk/src/Services/EC2InstanceConnect/Generated/AmazonEC2InstanceConnectConfig.cs
@@ -34,7 +34,7 @@ namespace Amazon.EC2InstanceConnect
     public partial class AmazonEC2InstanceConnectConfig : ClientConfig
     {
         private static readonly string UserAgentString =
-            InternalSDKUtils.BuildUserAgentString("EC2 Instance Connect", "3.7.301.27");
+            InternalSDKUtils.BuildUserAgentString("EC2 Instance Connect", "4.0.0.0");
 
         private static readonly AmazonEC2InstanceConnectEndpointResolver EndpointResolver =
             new AmazonEC2InstanceConnectEndpointResolver();
diff --git a/sdk/src/Services/EC2InstanceConnect/Properties/AssemblyInfo.cs b/sdk/src/Services/EC2InstanceConnect/Properties/AssemblyInfo.cs
index 8197efaa366b..4dc23b785f25 100644
--- a/sdk/src/Services/EC2InstanceConnect/Properties/AssemblyInfo.cs
+++ b/sdk/src/Services/EC2InstanceConnect/Properties/AssemblyInfo.cs
@@ -41,5 +41,9 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.301.27")]
\ No newline at end of file
+#if BCL
+[assembly: AssemblyVersion("4.0")]
+#else
+[assembly: AssemblyVersion("4.0.0.0")]
+#endif
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/src/Services/ECR/AWSSDK.ECR.NetFramework.csproj b/sdk/src/Services/ECR/AWSSDK.ECR.NetFramework.csproj
index e72538f7d1d8..d611abf32e0e 100644
--- a/sdk/src/Services/ECR/AWSSDK.ECR.NetFramework.csproj
+++ b/sdk/src/Services/ECR/AWSSDK.ECR.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);BCL;AWS_ASYNC_API;CODE_ANALYSIS</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(RuleSetFileForBuild)' == 'false' Or '$(RuleSetFileForBuild)' == '' ">
diff --git a/sdk/src/Services/ECR/AWSSDK.ECR.NetStandard.csproj b/sdk/src/Services/ECR/AWSSDK.ECR.NetStandard.csproj
index b7577d544fac..bd16f3be24a1 100644
--- a/sdk/src/Services/ECR/AWSSDK.ECR.NetStandard.csproj
+++ b/sdk/src/Services/ECR/AWSSDK.ECR.NetStandard.csproj
@@ -22,6 +22,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <!-- Async Enumerable Compatibility -->
diff --git a/sdk/src/Services/ECR/Generated/AmazonECRConfig.cs b/sdk/src/Services/ECR/Generated/AmazonECRConfig.cs
index 7cda115e19ea..f832f6b33176 100644
--- a/sdk/src/Services/ECR/Generated/AmazonECRConfig.cs
+++ b/sdk/src/Services/ECR/Generated/AmazonECRConfig.cs
@@ -34,7 +34,7 @@ namespace Amazon.ECR
     public partial class AmazonECRConfig : ClientConfig
     {
         private static readonly string UserAgentString =
-            InternalSDKUtils.BuildUserAgentString("ECR", "3.7.301.79");
+            InternalSDKUtils.BuildUserAgentString("ECR", "4.0.0.0");
 
         private static readonly AmazonECREndpointResolver EndpointResolver =
             new AmazonECREndpointResolver();
diff --git a/sdk/src/Services/ECR/Properties/AssemblyInfo.cs b/sdk/src/Services/ECR/Properties/AssemblyInfo.cs
index c72cceca02eb..7b175fe0b698 100644
--- a/sdk/src/Services/ECR/Properties/AssemblyInfo.cs
+++ b/sdk/src/Services/ECR/Properties/AssemblyInfo.cs
@@ -41,5 +41,9 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.301.79")]
\ No newline at end of file
+#if BCL
+[assembly: AssemblyVersion("4.0")]
+#else
+[assembly: AssemblyVersion("4.0.0.0")]
+#endif
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/src/Services/ECRPublic/AWSSDK.ECRPublic.NetFramework.csproj b/sdk/src/Services/ECRPublic/AWSSDK.ECRPublic.NetFramework.csproj
index 062799f0edeb..8b1e2498767f 100644
--- a/sdk/src/Services/ECRPublic/AWSSDK.ECRPublic.NetFramework.csproj
+++ b/sdk/src/Services/ECRPublic/AWSSDK.ECRPublic.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);BCL;AWS_ASYNC_API;CODE_ANALYSIS</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(RuleSetFileForBuild)' == 'false' Or '$(RuleSetFileForBuild)' == '' ">
diff --git a/sdk/src/Services/ECRPublic/AWSSDK.ECRPublic.NetStandard.csproj b/sdk/src/Services/ECRPublic/AWSSDK.ECRPublic.NetStandard.csproj
index fb31fa76c9fa..70b2d101a9e7 100644
--- a/sdk/src/Services/ECRPublic/AWSSDK.ECRPublic.NetStandard.csproj
+++ b/sdk/src/Services/ECRPublic/AWSSDK.ECRPublic.NetStandard.csproj
@@ -22,6 +22,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <!-- Async Enumerable Compatibility -->
diff --git a/sdk/src/Services/ECRPublic/Generated/AmazonECRPublicConfig.cs b/sdk/src/Services/ECRPublic/Generated/AmazonECRPublicConfig.cs
index 2bb09b5bb1b0..8d757497f04c 100644
--- a/sdk/src/Services/ECRPublic/Generated/AmazonECRPublicConfig.cs
+++ b/sdk/src/Services/ECRPublic/Generated/AmazonECRPublicConfig.cs
@@ -34,7 +34,7 @@ namespace Amazon.ECRPublic
     public partial class AmazonECRPublicConfig : ClientConfig
     {
         private static readonly string UserAgentString =
-            InternalSDKUtils.BuildUserAgentString("ECR PUBLIC", "3.7.300.84");
+            InternalSDKUtils.BuildUserAgentString("ECR PUBLIC", "4.0.0.0");
 
         private static readonly AmazonECRPublicEndpointResolver EndpointResolver =
             new AmazonECRPublicEndpointResolver();
diff --git a/sdk/src/Services/ECRPublic/Properties/AssemblyInfo.cs b/sdk/src/Services/ECRPublic/Properties/AssemblyInfo.cs
index 2558b5cc3a73..7af6def43c4f 100644
--- a/sdk/src/Services/ECRPublic/Properties/AssemblyInfo.cs
+++ b/sdk/src/Services/ECRPublic/Properties/AssemblyInfo.cs
@@ -41,5 +41,9 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.300.84")]
\ No newline at end of file
+#if BCL
+[assembly: AssemblyVersion("4.0")]
+#else
+[assembly: AssemblyVersion("4.0.0.0")]
+#endif
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/src/Services/ECS/AWSSDK.ECS.NetFramework.csproj b/sdk/src/Services/ECS/AWSSDK.ECS.NetFramework.csproj
index 2d93da2909d9..f39bc7344a1d 100644
--- a/sdk/src/Services/ECS/AWSSDK.ECS.NetFramework.csproj
+++ b/sdk/src/Services/ECS/AWSSDK.ECS.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);BCL;AWS_ASYNC_API;CODE_ANALYSIS</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(RuleSetFileForBuild)' == 'false' Or '$(RuleSetFileForBuild)' == '' ">
diff --git a/sdk/src/Services/ECS/AWSSDK.ECS.NetStandard.csproj b/sdk/src/Services/ECS/AWSSDK.ECS.NetStandard.csproj
index 3da7e4af4586..16435f701041 100644
--- a/sdk/src/Services/ECS/AWSSDK.ECS.NetStandard.csproj
+++ b/sdk/src/Services/ECS/AWSSDK.ECS.NetStandard.csproj
@@ -22,6 +22,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <!-- Async Enumerable Compatibility -->
diff --git a/sdk/src/Services/ECS/Generated/AmazonECSConfig.cs b/sdk/src/Services/ECS/Generated/AmazonECSConfig.cs
index 66b03754c4fc..80fea85f4ddc 100644
--- a/sdk/src/Services/ECS/Generated/AmazonECSConfig.cs
+++ b/sdk/src/Services/ECS/Generated/AmazonECSConfig.cs
@@ -34,7 +34,7 @@ namespace Amazon.ECS
     public partial class AmazonECSConfig : ClientConfig
     {
         private static readonly string UserAgentString =
-            InternalSDKUtils.BuildUserAgentString("ECS", "3.7.305.46");
+            InternalSDKUtils.BuildUserAgentString("ECS", "4.0.0.0");
 
         private static readonly AmazonECSEndpointResolver EndpointResolver =
             new AmazonECSEndpointResolver();
diff --git a/sdk/src/Services/ECS/Properties/AssemblyInfo.cs b/sdk/src/Services/ECS/Properties/AssemblyInfo.cs
index df33ef00a478..5976b359aa22 100644
--- a/sdk/src/Services/ECS/Properties/AssemblyInfo.cs
+++ b/sdk/src/Services/ECS/Properties/AssemblyInfo.cs
@@ -41,5 +41,9 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.305.46")]
\ No newline at end of file
+#if BCL
+[assembly: AssemblyVersion("4.0")]
+#else
+[assembly: AssemblyVersion("4.0.0.0")]
+#endif
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/src/Services/EKS/AWSSDK.EKS.NetFramework.csproj b/sdk/src/Services/EKS/AWSSDK.EKS.NetFramework.csproj
index 3de9f72e55b1..9a33bcd01451 100644
--- a/sdk/src/Services/EKS/AWSSDK.EKS.NetFramework.csproj
+++ b/sdk/src/Services/EKS/AWSSDK.EKS.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);BCL;AWS_ASYNC_API;CODE_ANALYSIS</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(RuleSetFileForBuild)' == 'false' Or '$(RuleSetFileForBuild)' == '' ">
diff --git a/sdk/src/Services/EKS/AWSSDK.EKS.NetStandard.csproj b/sdk/src/Services/EKS/AWSSDK.EKS.NetStandard.csproj
index c56822fade1b..fa4e39d4217e 100644
--- a/sdk/src/Services/EKS/AWSSDK.EKS.NetStandard.csproj
+++ b/sdk/src/Services/EKS/AWSSDK.EKS.NetStandard.csproj
@@ -22,6 +22,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <!-- Async Enumerable Compatibility -->
diff --git a/sdk/src/Services/EKS/Generated/AmazonEKSConfig.cs b/sdk/src/Services/EKS/Generated/AmazonEKSConfig.cs
index 00774d2e95bb..86dce758e3f2 100644
--- a/sdk/src/Services/EKS/Generated/AmazonEKSConfig.cs
+++ b/sdk/src/Services/EKS/Generated/AmazonEKSConfig.cs
@@ -34,7 +34,7 @@ namespace Amazon.EKS
     public partial class AmazonEKSConfig : ClientConfig
     {
         private static readonly string UserAgentString =
-            InternalSDKUtils.BuildUserAgentString("EKS", "3.7.305.20");
+            InternalSDKUtils.BuildUserAgentString("EKS", "4.0.0.0");
 
         private static readonly AmazonEKSEndpointResolver EndpointResolver =
             new AmazonEKSEndpointResolver();
diff --git a/sdk/src/Services/EKS/Properties/AssemblyInfo.cs b/sdk/src/Services/EKS/Properties/AssemblyInfo.cs
index 54379657db1b..498dc45aa276 100644
--- a/sdk/src/Services/EKS/Properties/AssemblyInfo.cs
+++ b/sdk/src/Services/EKS/Properties/AssemblyInfo.cs
@@ -41,5 +41,9 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.305.20")]
\ No newline at end of file
+#if BCL
+[assembly: AssemblyVersion("4.0")]
+#else
+[assembly: AssemblyVersion("4.0.0.0")]
+#endif
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/src/Services/EKSAuth/AWSSDK.EKSAuth.NetFramework.csproj b/sdk/src/Services/EKSAuth/AWSSDK.EKSAuth.NetFramework.csproj
index cb120988fc90..dcbf6ae3fed0 100644
--- a/sdk/src/Services/EKSAuth/AWSSDK.EKSAuth.NetFramework.csproj
+++ b/sdk/src/Services/EKSAuth/AWSSDK.EKSAuth.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);BCL;AWS_ASYNC_API;CODE_ANALYSIS</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(RuleSetFileForBuild)' == 'false' Or '$(RuleSetFileForBuild)' == '' ">
diff --git a/sdk/src/Services/EKSAuth/AWSSDK.EKSAuth.NetStandard.csproj b/sdk/src/Services/EKSAuth/AWSSDK.EKSAuth.NetStandard.csproj
index 653d89da0c00..f20721436b9b 100644
--- a/sdk/src/Services/EKSAuth/AWSSDK.EKSAuth.NetStandard.csproj
+++ b/sdk/src/Services/EKSAuth/AWSSDK.EKSAuth.NetStandard.csproj
@@ -22,6 +22,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <!-- Async Enumerable Compatibility -->
diff --git a/sdk/src/Services/EKSAuth/Generated/AmazonEKSAuthConfig.cs b/sdk/src/Services/EKSAuth/Generated/AmazonEKSAuthConfig.cs
index 650ae6cca242..544c98b98c4d 100644
--- a/sdk/src/Services/EKSAuth/Generated/AmazonEKSAuthConfig.cs
+++ b/sdk/src/Services/EKSAuth/Generated/AmazonEKSAuthConfig.cs
@@ -34,7 +34,7 @@ namespace Amazon.EKSAuth
     public partial class AmazonEKSAuthConfig : ClientConfig
     {
         private static readonly string UserAgentString =
-            InternalSDKUtils.BuildUserAgentString("EKS Auth", "3.7.300.76");
+            InternalSDKUtils.BuildUserAgentString("EKS Auth", "4.0.0.0");
 
         private static readonly AmazonEKSAuthEndpointResolver EndpointResolver =
             new AmazonEKSAuthEndpointResolver();
diff --git a/sdk/src/Services/EKSAuth/Properties/AssemblyInfo.cs b/sdk/src/Services/EKSAuth/Properties/AssemblyInfo.cs
index fd636d796971..744069e822ab 100644
--- a/sdk/src/Services/EKSAuth/Properties/AssemblyInfo.cs
+++ b/sdk/src/Services/EKSAuth/Properties/AssemblyInfo.cs
@@ -41,5 +41,9 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.300.76")]
\ No newline at end of file
+#if BCL
+[assembly: AssemblyVersion("4.0")]
+#else
+[assembly: AssemblyVersion("4.0.0.0")]
+#endif
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/src/Services/EMRContainers/AWSSDK.EMRContainers.NetFramework.csproj b/sdk/src/Services/EMRContainers/AWSSDK.EMRContainers.NetFramework.csproj
index c769fbf23f2f..e4ddb55e0adb 100644
--- a/sdk/src/Services/EMRContainers/AWSSDK.EMRContainers.NetFramework.csproj
+++ b/sdk/src/Services/EMRContainers/AWSSDK.EMRContainers.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);BCL;AWS_ASYNC_API;CODE_ANALYSIS</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(RuleSetFileForBuild)' == 'false' Or '$(RuleSetFileForBuild)' == '' ">
diff --git a/sdk/src/Services/EMRContainers/AWSSDK.EMRContainers.NetStandard.csproj b/sdk/src/Services/EMRContainers/AWSSDK.EMRContainers.NetStandard.csproj
index 5774003b797c..1b2eaec194f9 100644
--- a/sdk/src/Services/EMRContainers/AWSSDK.EMRContainers.NetStandard.csproj
+++ b/sdk/src/Services/EMRContainers/AWSSDK.EMRContainers.NetStandard.csproj
@@ -22,6 +22,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <!-- Async Enumerable Compatibility -->
diff --git a/sdk/src/Services/EMRContainers/Generated/AmazonEMRContainersConfig.cs b/sdk/src/Services/EMRContainers/Generated/AmazonEMRContainersConfig.cs
index 3d64b2bc34d1..d4ae9e9db880 100644
--- a/sdk/src/Services/EMRContainers/Generated/AmazonEMRContainersConfig.cs
+++ b/sdk/src/Services/EMRContainers/Generated/AmazonEMRContainersConfig.cs
@@ -34,7 +34,7 @@ namespace Amazon.EMRContainers
     public partial class AmazonEMRContainersConfig : ClientConfig
     {
         private static readonly string UserAgentString =
-            InternalSDKUtils.BuildUserAgentString("EMR containers", "3.7.303.3");
+            InternalSDKUtils.BuildUserAgentString("EMR containers", "4.0.0.0");
 
         private static readonly AmazonEMRContainersEndpointResolver EndpointResolver =
             new AmazonEMRContainersEndpointResolver();
diff --git a/sdk/src/Services/EMRContainers/Properties/AssemblyInfo.cs b/sdk/src/Services/EMRContainers/Properties/AssemblyInfo.cs
index 9fc35299094f..74fc0fe5011f 100644
--- a/sdk/src/Services/EMRContainers/Properties/AssemblyInfo.cs
+++ b/sdk/src/Services/EMRContainers/Properties/AssemblyInfo.cs
@@ -41,5 +41,9 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.303.3")]
\ No newline at end of file
+#if BCL
+[assembly: AssemblyVersion("4.0")]
+#else
+[assembly: AssemblyVersion("4.0.0.0")]
+#endif
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/src/Services/EMRServerless/AWSSDK.EMRServerless.NetFramework.csproj b/sdk/src/Services/EMRServerless/AWSSDK.EMRServerless.NetFramework.csproj
index 47b4643bbd04..00fca4545803 100644
--- a/sdk/src/Services/EMRServerless/AWSSDK.EMRServerless.NetFramework.csproj
+++ b/sdk/src/Services/EMRServerless/AWSSDK.EMRServerless.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);BCL;AWS_ASYNC_API;CODE_ANALYSIS</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(RuleSetFileForBuild)' == 'false' Or '$(RuleSetFileForBuild)' == '' ">
diff --git a/sdk/src/Services/EMRServerless/AWSSDK.EMRServerless.NetStandard.csproj b/sdk/src/Services/EMRServerless/AWSSDK.EMRServerless.NetStandard.csproj
index cab32e78fa5d..d32c3f57c244 100644
--- a/sdk/src/Services/EMRServerless/AWSSDK.EMRServerless.NetStandard.csproj
+++ b/sdk/src/Services/EMRServerless/AWSSDK.EMRServerless.NetStandard.csproj
@@ -22,6 +22,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <!-- Async Enumerable Compatibility -->
diff --git a/sdk/src/Services/EMRServerless/Generated/AmazonEMRServerlessConfig.cs b/sdk/src/Services/EMRServerless/Generated/AmazonEMRServerlessConfig.cs
index 27ff96760072..acf66872d248 100644
--- a/sdk/src/Services/EMRServerless/Generated/AmazonEMRServerlessConfig.cs
+++ b/sdk/src/Services/EMRServerless/Generated/AmazonEMRServerlessConfig.cs
@@ -34,7 +34,7 @@ namespace Amazon.EMRServerless
     public partial class AmazonEMRServerlessConfig : ClientConfig
     {
         private static readonly string UserAgentString =
-            InternalSDKUtils.BuildUserAgentString("EMR Serverless", "3.7.302.7");
+            InternalSDKUtils.BuildUserAgentString("EMR Serverless", "4.0.0.0");
 
         private static readonly AmazonEMRServerlessEndpointResolver EndpointResolver =
             new AmazonEMRServerlessEndpointResolver();
diff --git a/sdk/src/Services/EMRServerless/Properties/AssemblyInfo.cs b/sdk/src/Services/EMRServerless/Properties/AssemblyInfo.cs
index 01db68af3cc2..552281274691 100644
--- a/sdk/src/Services/EMRServerless/Properties/AssemblyInfo.cs
+++ b/sdk/src/Services/EMRServerless/Properties/AssemblyInfo.cs
@@ -41,5 +41,9 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.302.7")]
\ No newline at end of file
+#if BCL
+[assembly: AssemblyVersion("4.0")]
+#else
+[assembly: AssemblyVersion("4.0.0.0")]
+#endif
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/src/Services/ElastiCache/AWSSDK.ElastiCache.NetFramework.csproj b/sdk/src/Services/ElastiCache/AWSSDK.ElastiCache.NetFramework.csproj
index 233b21a74380..7fe2b1f2f22d 100644
--- a/sdk/src/Services/ElastiCache/AWSSDK.ElastiCache.NetFramework.csproj
+++ b/sdk/src/Services/ElastiCache/AWSSDK.ElastiCache.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);BCL;AWS_ASYNC_API;CODE_ANALYSIS</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(RuleSetFileForBuild)' == 'false' Or '$(RuleSetFileForBuild)' == '' ">
diff --git a/sdk/src/Services/ElastiCache/AWSSDK.ElastiCache.NetStandard.csproj b/sdk/src/Services/ElastiCache/AWSSDK.ElastiCache.NetStandard.csproj
index 458b5435d723..5663623f50a4 100644
--- a/sdk/src/Services/ElastiCache/AWSSDK.ElastiCache.NetStandard.csproj
+++ b/sdk/src/Services/ElastiCache/AWSSDK.ElastiCache.NetStandard.csproj
@@ -22,6 +22,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <!-- Async Enumerable Compatibility -->
diff --git a/sdk/src/Services/ElastiCache/Generated/AmazonElastiCacheConfig.cs b/sdk/src/Services/ElastiCache/Generated/AmazonElastiCacheConfig.cs
index 3e9270e8bf65..178a8f3a84b4 100644
--- a/sdk/src/Services/ElastiCache/Generated/AmazonElastiCacheConfig.cs
+++ b/sdk/src/Services/ElastiCache/Generated/AmazonElastiCacheConfig.cs
@@ -34,7 +34,7 @@ namespace Amazon.ElastiCache
     public partial class AmazonElastiCacheConfig : ClientConfig
     {
         private static readonly string UserAgentString =
-            InternalSDKUtils.BuildUserAgentString("ElastiCache", "3.7.302.21");
+            InternalSDKUtils.BuildUserAgentString("ElastiCache", "4.0.0.0");
 
         private static readonly AmazonElastiCacheEndpointResolver EndpointResolver =
             new AmazonElastiCacheEndpointResolver();
diff --git a/sdk/src/Services/ElastiCache/Properties/AssemblyInfo.cs b/sdk/src/Services/ElastiCache/Properties/AssemblyInfo.cs
index 54b1b6bd491e..a7d39ecba928 100644
--- a/sdk/src/Services/ElastiCache/Properties/AssemblyInfo.cs
+++ b/sdk/src/Services/ElastiCache/Properties/AssemblyInfo.cs
@@ -41,5 +41,9 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.302.21")]
\ No newline at end of file
+#if BCL
+[assembly: AssemblyVersion("4.0")]
+#else
+[assembly: AssemblyVersion("4.0.0.0")]
+#endif
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/src/Services/ElasticBeanstalk/AWSSDK.ElasticBeanstalk.NetFramework.csproj b/sdk/src/Services/ElasticBeanstalk/AWSSDK.ElasticBeanstalk.NetFramework.csproj
index 429a9606a967..5e7988626205 100644
--- a/sdk/src/Services/ElasticBeanstalk/AWSSDK.ElasticBeanstalk.NetFramework.csproj
+++ b/sdk/src/Services/ElasticBeanstalk/AWSSDK.ElasticBeanstalk.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);BCL;AWS_ASYNC_API;CODE_ANALYSIS</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(RuleSetFileForBuild)' == 'false' Or '$(RuleSetFileForBuild)' == '' ">
diff --git a/sdk/src/Services/ElasticBeanstalk/AWSSDK.ElasticBeanstalk.NetStandard.csproj b/sdk/src/Services/ElasticBeanstalk/AWSSDK.ElasticBeanstalk.NetStandard.csproj
index 41b26146a75e..ddf66e5c2e84 100644
--- a/sdk/src/Services/ElasticBeanstalk/AWSSDK.ElasticBeanstalk.NetStandard.csproj
+++ b/sdk/src/Services/ElasticBeanstalk/AWSSDK.ElasticBeanstalk.NetStandard.csproj
@@ -22,6 +22,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <!-- Async Enumerable Compatibility -->
diff --git a/sdk/src/Services/ElasticBeanstalk/Generated/AmazonElasticBeanstalkConfig.cs b/sdk/src/Services/ElasticBeanstalk/Generated/AmazonElasticBeanstalkConfig.cs
index 2981a023a373..82b3c5d54f82 100644
--- a/sdk/src/Services/ElasticBeanstalk/Generated/AmazonElasticBeanstalkConfig.cs
+++ b/sdk/src/Services/ElasticBeanstalk/Generated/AmazonElasticBeanstalkConfig.cs
@@ -34,7 +34,7 @@ namespace Amazon.ElasticBeanstalk
     public partial class AmazonElasticBeanstalkConfig : ClientConfig
     {
         private static readonly string UserAgentString =
-            InternalSDKUtils.BuildUserAgentString("Elastic Beanstalk", "3.7.300.84");
+            InternalSDKUtils.BuildUserAgentString("Elastic Beanstalk", "4.0.0.0");
 
         private static readonly AmazonElasticBeanstalkEndpointResolver EndpointResolver =
             new AmazonElasticBeanstalkEndpointResolver();
diff --git a/sdk/src/Services/ElasticBeanstalk/Properties/AssemblyInfo.cs b/sdk/src/Services/ElasticBeanstalk/Properties/AssemblyInfo.cs
index 7f5f342fe036..a2e63ae3f61a 100644
--- a/sdk/src/Services/ElasticBeanstalk/Properties/AssemblyInfo.cs
+++ b/sdk/src/Services/ElasticBeanstalk/Properties/AssemblyInfo.cs
@@ -41,5 +41,9 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.300.84")]
\ No newline at end of file
+#if BCL
+[assembly: AssemblyVersion("4.0")]
+#else
+[assembly: AssemblyVersion("4.0.0.0")]
+#endif
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/src/Services/ElasticFileSystem/AWSSDK.ElasticFileSystem.NetFramework.csproj b/sdk/src/Services/ElasticFileSystem/AWSSDK.ElasticFileSystem.NetFramework.csproj
index cf8e629f80cc..d1790b982ed7 100644
--- a/sdk/src/Services/ElasticFileSystem/AWSSDK.ElasticFileSystem.NetFramework.csproj
+++ b/sdk/src/Services/ElasticFileSystem/AWSSDK.ElasticFileSystem.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);BCL;AWS_ASYNC_API;CODE_ANALYSIS</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(RuleSetFileForBuild)' == 'false' Or '$(RuleSetFileForBuild)' == '' ">
diff --git a/sdk/src/Services/ElasticFileSystem/AWSSDK.ElasticFileSystem.NetStandard.csproj b/sdk/src/Services/ElasticFileSystem/AWSSDK.ElasticFileSystem.NetStandard.csproj
index 4fc91c6334ed..1425f172e35d 100644
--- a/sdk/src/Services/ElasticFileSystem/AWSSDK.ElasticFileSystem.NetStandard.csproj
+++ b/sdk/src/Services/ElasticFileSystem/AWSSDK.ElasticFileSystem.NetStandard.csproj
@@ -22,6 +22,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <!-- Async Enumerable Compatibility -->
diff --git a/sdk/src/Services/ElasticFileSystem/Generated/AmazonElasticFileSystemConfig.cs b/sdk/src/Services/ElasticFileSystem/Generated/AmazonElasticFileSystemConfig.cs
index c112c1a9368a..6f343dd49d13 100644
--- a/sdk/src/Services/ElasticFileSystem/Generated/AmazonElasticFileSystemConfig.cs
+++ b/sdk/src/Services/ElasticFileSystem/Generated/AmazonElasticFileSystemConfig.cs
@@ -34,7 +34,7 @@ namespace Amazon.ElasticFileSystem
     public partial class AmazonElasticFileSystemConfig : ClientConfig
     {
         private static readonly string UserAgentString =
-            InternalSDKUtils.BuildUserAgentString("EFS", "3.7.302.75");
+            InternalSDKUtils.BuildUserAgentString("EFS", "4.0.0.0");
 
         private static readonly AmazonElasticFileSystemEndpointResolver EndpointResolver =
             new AmazonElasticFileSystemEndpointResolver();
diff --git a/sdk/src/Services/ElasticFileSystem/Properties/AssemblyInfo.cs b/sdk/src/Services/ElasticFileSystem/Properties/AssemblyInfo.cs
index 6ccf0a5480b5..e6f80dbf1a21 100644
--- a/sdk/src/Services/ElasticFileSystem/Properties/AssemblyInfo.cs
+++ b/sdk/src/Services/ElasticFileSystem/Properties/AssemblyInfo.cs
@@ -41,5 +41,9 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.302.75")]
\ No newline at end of file
+#if BCL
+[assembly: AssemblyVersion("4.0")]
+#else
+[assembly: AssemblyVersion("4.0.0.0")]
+#endif
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/src/Services/ElasticInference/AWSSDK.ElasticInference.NetFramework.csproj b/sdk/src/Services/ElasticInference/AWSSDK.ElasticInference.NetFramework.csproj
index f9d3dd5f94b8..1c97e8b01b2e 100644
--- a/sdk/src/Services/ElasticInference/AWSSDK.ElasticInference.NetFramework.csproj
+++ b/sdk/src/Services/ElasticInference/AWSSDK.ElasticInference.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);BCL;AWS_ASYNC_API;CODE_ANALYSIS</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(RuleSetFileForBuild)' == 'false' Or '$(RuleSetFileForBuild)' == '' ">
diff --git a/sdk/src/Services/ElasticInference/AWSSDK.ElasticInference.NetStandard.csproj b/sdk/src/Services/ElasticInference/AWSSDK.ElasticInference.NetStandard.csproj
index d868bf2f58e3..c085019a734a 100644
--- a/sdk/src/Services/ElasticInference/AWSSDK.ElasticInference.NetStandard.csproj
+++ b/sdk/src/Services/ElasticInference/AWSSDK.ElasticInference.NetStandard.csproj
@@ -22,6 +22,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <!-- Async Enumerable Compatibility -->
diff --git a/sdk/src/Services/ElasticInference/Generated/AmazonElasticInferenceConfig.cs b/sdk/src/Services/ElasticInference/Generated/AmazonElasticInferenceConfig.cs
index 4b98079fc14e..186f20d927e6 100644
--- a/sdk/src/Services/ElasticInference/Generated/AmazonElasticInferenceConfig.cs
+++ b/sdk/src/Services/ElasticInference/Generated/AmazonElasticInferenceConfig.cs
@@ -34,7 +34,7 @@ namespace Amazon.ElasticInference
     public partial class AmazonElasticInferenceConfig : ClientConfig
     {
         private static readonly string UserAgentString =
-            InternalSDKUtils.BuildUserAgentString("Elastic Inference", "3.7.300.84");
+            InternalSDKUtils.BuildUserAgentString("Elastic Inference", "4.0.0.0");
 
         private static readonly AmazonElasticInferenceEndpointResolver EndpointResolver =
             new AmazonElasticInferenceEndpointResolver();
diff --git a/sdk/src/Services/ElasticInference/Properties/AssemblyInfo.cs b/sdk/src/Services/ElasticInference/Properties/AssemblyInfo.cs
index fe57379f2a89..a56bcd186f2c 100644
--- a/sdk/src/Services/ElasticInference/Properties/AssemblyInfo.cs
+++ b/sdk/src/Services/ElasticInference/Properties/AssemblyInfo.cs
@@ -41,5 +41,9 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.300.84")]
\ No newline at end of file
+#if BCL
+[assembly: AssemblyVersion("4.0")]
+#else
+[assembly: AssemblyVersion("4.0.0.0")]
+#endif
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/src/Services/ElasticLoadBalancing/AWSSDK.ElasticLoadBalancing.NetFramework.csproj b/sdk/src/Services/ElasticLoadBalancing/AWSSDK.ElasticLoadBalancing.NetFramework.csproj
index 2b91cfd8217e..27c3e355b0b0 100644
--- a/sdk/src/Services/ElasticLoadBalancing/AWSSDK.ElasticLoadBalancing.NetFramework.csproj
+++ b/sdk/src/Services/ElasticLoadBalancing/AWSSDK.ElasticLoadBalancing.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);BCL;AWS_ASYNC_API;CODE_ANALYSIS</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(RuleSetFileForBuild)' == 'false' Or '$(RuleSetFileForBuild)' == '' ">
diff --git a/sdk/src/Services/ElasticLoadBalancing/AWSSDK.ElasticLoadBalancing.NetStandard.csproj b/sdk/src/Services/ElasticLoadBalancing/AWSSDK.ElasticLoadBalancing.NetStandard.csproj
index 5ff6baceec76..050b0f335f8b 100644
--- a/sdk/src/Services/ElasticLoadBalancing/AWSSDK.ElasticLoadBalancing.NetStandard.csproj
+++ b/sdk/src/Services/ElasticLoadBalancing/AWSSDK.ElasticLoadBalancing.NetStandard.csproj
@@ -22,6 +22,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <!-- Async Enumerable Compatibility -->
diff --git a/sdk/src/Services/ElasticLoadBalancing/Generated/AmazonElasticLoadBalancingConfig.cs b/sdk/src/Services/ElasticLoadBalancing/Generated/AmazonElasticLoadBalancingConfig.cs
index 3bfb416cc68e..5fdf5e89db52 100644
--- a/sdk/src/Services/ElasticLoadBalancing/Generated/AmazonElasticLoadBalancingConfig.cs
+++ b/sdk/src/Services/ElasticLoadBalancing/Generated/AmazonElasticLoadBalancingConfig.cs
@@ -34,7 +34,7 @@ namespace Amazon.ElasticLoadBalancing
     public partial class AmazonElasticLoadBalancingConfig : ClientConfig
     {
         private static readonly string UserAgentString =
-            InternalSDKUtils.BuildUserAgentString("Elastic Load Balancing", "3.7.300.84");
+            InternalSDKUtils.BuildUserAgentString("Elastic Load Balancing", "4.0.0.0");
 
         private static readonly AmazonElasticLoadBalancingEndpointResolver EndpointResolver =
             new AmazonElasticLoadBalancingEndpointResolver();
diff --git a/sdk/src/Services/ElasticLoadBalancing/Properties/AssemblyInfo.cs b/sdk/src/Services/ElasticLoadBalancing/Properties/AssemblyInfo.cs
index 300ef166c72b..a5ebe8984634 100644
--- a/sdk/src/Services/ElasticLoadBalancing/Properties/AssemblyInfo.cs
+++ b/sdk/src/Services/ElasticLoadBalancing/Properties/AssemblyInfo.cs
@@ -41,5 +41,9 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.300.84")]
\ No newline at end of file
+#if BCL
+[assembly: AssemblyVersion("4.0")]
+#else
+[assembly: AssemblyVersion("4.0.0.0")]
+#endif
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/src/Services/ElasticLoadBalancingV2/AWSSDK.ElasticLoadBalancingV2.NetFramework.csproj b/sdk/src/Services/ElasticLoadBalancingV2/AWSSDK.ElasticLoadBalancingV2.NetFramework.csproj
index b8191bc92a5b..dc3423e14c1c 100644
--- a/sdk/src/Services/ElasticLoadBalancingV2/AWSSDK.ElasticLoadBalancingV2.NetFramework.csproj
+++ b/sdk/src/Services/ElasticLoadBalancingV2/AWSSDK.ElasticLoadBalancingV2.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);BCL;AWS_ASYNC_API;CODE_ANALYSIS</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(RuleSetFileForBuild)' == 'false' Or '$(RuleSetFileForBuild)' == '' ">
diff --git a/sdk/src/Services/ElasticLoadBalancingV2/AWSSDK.ElasticLoadBalancingV2.NetStandard.csproj b/sdk/src/Services/ElasticLoadBalancingV2/AWSSDK.ElasticLoadBalancingV2.NetStandard.csproj
index 0a339b5ba71e..a5bd82b6c7f1 100644
--- a/sdk/src/Services/ElasticLoadBalancingV2/AWSSDK.ElasticLoadBalancingV2.NetStandard.csproj
+++ b/sdk/src/Services/ElasticLoadBalancingV2/AWSSDK.ElasticLoadBalancingV2.NetStandard.csproj
@@ -22,6 +22,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <!-- Async Enumerable Compatibility -->
diff --git a/sdk/src/Services/ElasticLoadBalancingV2/Generated/AmazonElasticLoadBalancingV2Config.cs b/sdk/src/Services/ElasticLoadBalancingV2/Generated/AmazonElasticLoadBalancingV2Config.cs
index 2a867bea7021..26af6b0522ac 100644
--- a/sdk/src/Services/ElasticLoadBalancingV2/Generated/AmazonElasticLoadBalancingV2Config.cs
+++ b/sdk/src/Services/ElasticLoadBalancingV2/Generated/AmazonElasticLoadBalancingV2Config.cs
@@ -34,7 +34,7 @@ namespace Amazon.ElasticLoadBalancingV2
     public partial class AmazonElasticLoadBalancingV2Config : ClientConfig
     {
         private static readonly string UserAgentString =
-            InternalSDKUtils.BuildUserAgentString("Elastic Load Balancing v2", "3.7.302.40");
+            InternalSDKUtils.BuildUserAgentString("Elastic Load Balancing v2", "4.0.0.0");
 
         private static readonly AmazonElasticLoadBalancingV2EndpointResolver EndpointResolver =
             new AmazonElasticLoadBalancingV2EndpointResolver();
diff --git a/sdk/src/Services/ElasticLoadBalancingV2/Properties/AssemblyInfo.cs b/sdk/src/Services/ElasticLoadBalancingV2/Properties/AssemblyInfo.cs
index 10ba8dc00b21..81d6fb63e0e8 100644
--- a/sdk/src/Services/ElasticLoadBalancingV2/Properties/AssemblyInfo.cs
+++ b/sdk/src/Services/ElasticLoadBalancingV2/Properties/AssemblyInfo.cs
@@ -41,5 +41,9 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.302.40")]
\ No newline at end of file
+#if BCL
+[assembly: AssemblyVersion("4.0")]
+#else
+[assembly: AssemblyVersion("4.0.0.0")]
+#endif
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/src/Services/ElasticMapReduce/AWSSDK.ElasticMapReduce.NetFramework.csproj b/sdk/src/Services/ElasticMapReduce/AWSSDK.ElasticMapReduce.NetFramework.csproj
index 042ed3c94b41..387939eb9472 100644
--- a/sdk/src/Services/ElasticMapReduce/AWSSDK.ElasticMapReduce.NetFramework.csproj
+++ b/sdk/src/Services/ElasticMapReduce/AWSSDK.ElasticMapReduce.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);BCL;AWS_ASYNC_API;CODE_ANALYSIS</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(RuleSetFileForBuild)' == 'false' Or '$(RuleSetFileForBuild)' == '' ">
diff --git a/sdk/src/Services/ElasticMapReduce/AWSSDK.ElasticMapReduce.NetStandard.csproj b/sdk/src/Services/ElasticMapReduce/AWSSDK.ElasticMapReduce.NetStandard.csproj
index 48fd3d131692..5ee0832c5002 100644
--- a/sdk/src/Services/ElasticMapReduce/AWSSDK.ElasticMapReduce.NetStandard.csproj
+++ b/sdk/src/Services/ElasticMapReduce/AWSSDK.ElasticMapReduce.NetStandard.csproj
@@ -22,6 +22,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <!-- Async Enumerable Compatibility -->
diff --git a/sdk/src/Services/ElasticMapReduce/Generated/AmazonElasticMapReduceConfig.cs b/sdk/src/Services/ElasticMapReduce/Generated/AmazonElasticMapReduceConfig.cs
index 457c9987d2d6..61ce719c9768 100644
--- a/sdk/src/Services/ElasticMapReduce/Generated/AmazonElasticMapReduceConfig.cs
+++ b/sdk/src/Services/ElasticMapReduce/Generated/AmazonElasticMapReduceConfig.cs
@@ -34,7 +34,7 @@ namespace Amazon.ElasticMapReduce
     public partial class AmazonElasticMapReduceConfig : ClientConfig
     {
         private static readonly string UserAgentString =
-            InternalSDKUtils.BuildUserAgentString("EMR", "3.7.304.32");
+            InternalSDKUtils.BuildUserAgentString("EMR", "4.0.0.0");
 
         private static readonly AmazonElasticMapReduceEndpointResolver EndpointResolver =
             new AmazonElasticMapReduceEndpointResolver();
diff --git a/sdk/src/Services/ElasticMapReduce/Properties/AssemblyInfo.cs b/sdk/src/Services/ElasticMapReduce/Properties/AssemblyInfo.cs
index 2258c17277b2..ee3eacd5ad7c 100644
--- a/sdk/src/Services/ElasticMapReduce/Properties/AssemblyInfo.cs
+++ b/sdk/src/Services/ElasticMapReduce/Properties/AssemblyInfo.cs
@@ -41,5 +41,9 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.304.32")]
\ No newline at end of file
+#if BCL
+[assembly: AssemblyVersion("4.0")]
+#else
+[assembly: AssemblyVersion("4.0.0.0")]
+#endif
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/src/Services/ElasticTranscoder/AWSSDK.ElasticTranscoder.NetFramework.csproj b/sdk/src/Services/ElasticTranscoder/AWSSDK.ElasticTranscoder.NetFramework.csproj
index 63e7f266ed3c..509afecf3228 100644
--- a/sdk/src/Services/ElasticTranscoder/AWSSDK.ElasticTranscoder.NetFramework.csproj
+++ b/sdk/src/Services/ElasticTranscoder/AWSSDK.ElasticTranscoder.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);BCL;AWS_ASYNC_API;CODE_ANALYSIS</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(RuleSetFileForBuild)' == 'false' Or '$(RuleSetFileForBuild)' == '' ">
diff --git a/sdk/src/Services/ElasticTranscoder/AWSSDK.ElasticTranscoder.NetStandard.csproj b/sdk/src/Services/ElasticTranscoder/AWSSDK.ElasticTranscoder.NetStandard.csproj
index 063940a43ac5..b3caaa58fb64 100644
--- a/sdk/src/Services/ElasticTranscoder/AWSSDK.ElasticTranscoder.NetStandard.csproj
+++ b/sdk/src/Services/ElasticTranscoder/AWSSDK.ElasticTranscoder.NetStandard.csproj
@@ -22,6 +22,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <!-- Async Enumerable Compatibility -->
diff --git a/sdk/src/Services/ElasticTranscoder/Generated/AmazonElasticTranscoderConfig.cs b/sdk/src/Services/ElasticTranscoder/Generated/AmazonElasticTranscoderConfig.cs
index 7eb751d92e9a..7aaebb125a30 100644
--- a/sdk/src/Services/ElasticTranscoder/Generated/AmazonElasticTranscoderConfig.cs
+++ b/sdk/src/Services/ElasticTranscoder/Generated/AmazonElasticTranscoderConfig.cs
@@ -34,7 +34,7 @@ namespace Amazon.ElasticTranscoder
     public partial class AmazonElasticTranscoderConfig : ClientConfig
     {
         private static readonly string UserAgentString =
-            InternalSDKUtils.BuildUserAgentString("Elastic Transcoder", "3.7.300.84");
+            InternalSDKUtils.BuildUserAgentString("Elastic Transcoder", "4.0.0.0");
 
         private static readonly AmazonElasticTranscoderEndpointResolver EndpointResolver =
             new AmazonElasticTranscoderEndpointResolver();
diff --git a/sdk/src/Services/ElasticTranscoder/Properties/AssemblyInfo.cs b/sdk/src/Services/ElasticTranscoder/Properties/AssemblyInfo.cs
index bb90e290864a..ecd1c8ba8357 100644
--- a/sdk/src/Services/ElasticTranscoder/Properties/AssemblyInfo.cs
+++ b/sdk/src/Services/ElasticTranscoder/Properties/AssemblyInfo.cs
@@ -41,5 +41,9 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.300.84")]
\ No newline at end of file
+#if BCL
+[assembly: AssemblyVersion("4.0")]
+#else
+[assembly: AssemblyVersion("4.0.0.0")]
+#endif
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/src/Services/Elasticsearch/AWSSDK.Elasticsearch.NetFramework.csproj b/sdk/src/Services/Elasticsearch/AWSSDK.Elasticsearch.NetFramework.csproj
index 96a1bae5b020..38689be47dd6 100644
--- a/sdk/src/Services/Elasticsearch/AWSSDK.Elasticsearch.NetFramework.csproj
+++ b/sdk/src/Services/Elasticsearch/AWSSDK.Elasticsearch.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);BCL;AWS_ASYNC_API;CODE_ANALYSIS</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(RuleSetFileForBuild)' == 'false' Or '$(RuleSetFileForBuild)' == '' ">
diff --git a/sdk/src/Services/Elasticsearch/AWSSDK.Elasticsearch.NetStandard.csproj b/sdk/src/Services/Elasticsearch/AWSSDK.Elasticsearch.NetStandard.csproj
index 00746f3cafc0..1befde7415a3 100644
--- a/sdk/src/Services/Elasticsearch/AWSSDK.Elasticsearch.NetStandard.csproj
+++ b/sdk/src/Services/Elasticsearch/AWSSDK.Elasticsearch.NetStandard.csproj
@@ -22,6 +22,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <!-- Async Enumerable Compatibility -->
diff --git a/sdk/src/Services/Elasticsearch/Generated/AmazonElasticsearchConfig.cs b/sdk/src/Services/Elasticsearch/Generated/AmazonElasticsearchConfig.cs
index 3d057d502044..f2457daa4a18 100644
--- a/sdk/src/Services/Elasticsearch/Generated/AmazonElasticsearchConfig.cs
+++ b/sdk/src/Services/Elasticsearch/Generated/AmazonElasticsearchConfig.cs
@@ -34,7 +34,7 @@ namespace Amazon.Elasticsearch
     public partial class AmazonElasticsearchConfig : ClientConfig
     {
         private static readonly string UserAgentString =
-            InternalSDKUtils.BuildUserAgentString("Elasticsearch Service", "3.7.302.38");
+            InternalSDKUtils.BuildUserAgentString("Elasticsearch Service", "4.0.0.0");
 
         private static readonly AmazonElasticsearchEndpointResolver EndpointResolver =
             new AmazonElasticsearchEndpointResolver();
diff --git a/sdk/src/Services/Elasticsearch/Properties/AssemblyInfo.cs b/sdk/src/Services/Elasticsearch/Properties/AssemblyInfo.cs
index b689e83616b4..4e30a6f606dd 100644
--- a/sdk/src/Services/Elasticsearch/Properties/AssemblyInfo.cs
+++ b/sdk/src/Services/Elasticsearch/Properties/AssemblyInfo.cs
@@ -41,5 +41,9 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.302.38")]
\ No newline at end of file
+#if BCL
+[assembly: AssemblyVersion("4.0")]
+#else
+[assembly: AssemblyVersion("4.0.0.0")]
+#endif
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/src/Services/EntityResolution/AWSSDK.EntityResolution.NetFramework.csproj b/sdk/src/Services/EntityResolution/AWSSDK.EntityResolution.NetFramework.csproj
index c5db824c2a78..1eb52f20bfe2 100644
--- a/sdk/src/Services/EntityResolution/AWSSDK.EntityResolution.NetFramework.csproj
+++ b/sdk/src/Services/EntityResolution/AWSSDK.EntityResolution.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);BCL;AWS_ASYNC_API;CODE_ANALYSIS</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(RuleSetFileForBuild)' == 'false' Or '$(RuleSetFileForBuild)' == '' ">
diff --git a/sdk/src/Services/EntityResolution/AWSSDK.EntityResolution.NetStandard.csproj b/sdk/src/Services/EntityResolution/AWSSDK.EntityResolution.NetStandard.csproj
index ece52e2aea3a..e4455b4fc0bf 100644
--- a/sdk/src/Services/EntityResolution/AWSSDK.EntityResolution.NetStandard.csproj
+++ b/sdk/src/Services/EntityResolution/AWSSDK.EntityResolution.NetStandard.csproj
@@ -22,6 +22,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <!-- Async Enumerable Compatibility -->
diff --git a/sdk/src/Services/EntityResolution/Generated/AmazonEntityResolutionConfig.cs b/sdk/src/Services/EntityResolution/Generated/AmazonEntityResolutionConfig.cs
index f267088ed64a..b57e906ffabb 100644
--- a/sdk/src/Services/EntityResolution/Generated/AmazonEntityResolutionConfig.cs
+++ b/sdk/src/Services/EntityResolution/Generated/AmazonEntityResolutionConfig.cs
@@ -34,7 +34,7 @@ namespace Amazon.EntityResolution
     public partial class AmazonEntityResolutionConfig : ClientConfig
     {
         private static readonly string UserAgentString =
-            InternalSDKUtils.BuildUserAgentString("EntityResolution", "3.7.302.3");
+            InternalSDKUtils.BuildUserAgentString("EntityResolution", "4.0.0.0");
 
         private static readonly AmazonEntityResolutionEndpointResolver EndpointResolver =
             new AmazonEntityResolutionEndpointResolver();
diff --git a/sdk/src/Services/EntityResolution/Properties/AssemblyInfo.cs b/sdk/src/Services/EntityResolution/Properties/AssemblyInfo.cs
index 5e4f02e584fa..bdfd152c537c 100644
--- a/sdk/src/Services/EntityResolution/Properties/AssemblyInfo.cs
+++ b/sdk/src/Services/EntityResolution/Properties/AssemblyInfo.cs
@@ -41,5 +41,9 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.302.3")]
\ No newline at end of file
+#if BCL
+[assembly: AssemblyVersion("4.0")]
+#else
+[assembly: AssemblyVersion("4.0.0.0")]
+#endif
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/src/Services/EventBridge/AWSSDK.EventBridge.NetFramework.csproj b/sdk/src/Services/EventBridge/AWSSDK.EventBridge.NetFramework.csproj
index cd79c0ecb236..00abb7cdb5ec 100644
--- a/sdk/src/Services/EventBridge/AWSSDK.EventBridge.NetFramework.csproj
+++ b/sdk/src/Services/EventBridge/AWSSDK.EventBridge.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);BCL;AWS_ASYNC_API;CODE_ANALYSIS</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(RuleSetFileForBuild)' == 'false' Or '$(RuleSetFileForBuild)' == '' ">
diff --git a/sdk/src/Services/EventBridge/AWSSDK.EventBridge.NetStandard.csproj b/sdk/src/Services/EventBridge/AWSSDK.EventBridge.NetStandard.csproj
index e454edb8b122..fbc6ccc42145 100644
--- a/sdk/src/Services/EventBridge/AWSSDK.EventBridge.NetStandard.csproj
+++ b/sdk/src/Services/EventBridge/AWSSDK.EventBridge.NetStandard.csproj
@@ -22,6 +22,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <!-- Async Enumerable Compatibility -->
diff --git a/sdk/src/Services/EventBridge/Generated/AmazonEventBridgeConfig.cs b/sdk/src/Services/EventBridge/Generated/AmazonEventBridgeConfig.cs
index 42493100757e..9744b7aa1e03 100644
--- a/sdk/src/Services/EventBridge/Generated/AmazonEventBridgeConfig.cs
+++ b/sdk/src/Services/EventBridge/Generated/AmazonEventBridgeConfig.cs
@@ -34,7 +34,7 @@ namespace Amazon.EventBridge
     public partial class AmazonEventBridgeConfig : ClientConfig
     {
         private static readonly string UserAgentString =
-            InternalSDKUtils.BuildUserAgentString("EventBridge", "3.7.302.50");
+            InternalSDKUtils.BuildUserAgentString("EventBridge", "4.0.0.0");
 
         private static readonly AmazonEventBridgeEndpointResolver EndpointResolver =
             new AmazonEventBridgeEndpointResolver();
diff --git a/sdk/src/Services/EventBridge/Properties/AssemblyInfo.cs b/sdk/src/Services/EventBridge/Properties/AssemblyInfo.cs
index f9d26ffb09d1..0e5a05090343 100644
--- a/sdk/src/Services/EventBridge/Properties/AssemblyInfo.cs
+++ b/sdk/src/Services/EventBridge/Properties/AssemblyInfo.cs
@@ -41,5 +41,9 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.302.50")]
\ No newline at end of file
+#if BCL
+[assembly: AssemblyVersion("4.0")]
+#else
+[assembly: AssemblyVersion("4.0.0.0")]
+#endif
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/src/Services/FIS/AWSSDK.FIS.NetFramework.csproj b/sdk/src/Services/FIS/AWSSDK.FIS.NetFramework.csproj
index 303171457eec..4615fadfebb5 100644
--- a/sdk/src/Services/FIS/AWSSDK.FIS.NetFramework.csproj
+++ b/sdk/src/Services/FIS/AWSSDK.FIS.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);BCL;AWS_ASYNC_API;CODE_ANALYSIS</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(RuleSetFileForBuild)' == 'false' Or '$(RuleSetFileForBuild)' == '' ">
diff --git a/sdk/src/Services/FIS/AWSSDK.FIS.NetStandard.csproj b/sdk/src/Services/FIS/AWSSDK.FIS.NetStandard.csproj
index e7789bf3a693..553f3e20d90e 100644
--- a/sdk/src/Services/FIS/AWSSDK.FIS.NetStandard.csproj
+++ b/sdk/src/Services/FIS/AWSSDK.FIS.NetStandard.csproj
@@ -22,6 +22,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <!-- Async Enumerable Compatibility -->
diff --git a/sdk/src/Services/FIS/Generated/AmazonFISConfig.cs b/sdk/src/Services/FIS/Generated/AmazonFISConfig.cs
index 0bbccce0aa7f..50ced0886be2 100644
--- a/sdk/src/Services/FIS/Generated/AmazonFISConfig.cs
+++ b/sdk/src/Services/FIS/Generated/AmazonFISConfig.cs
@@ -34,7 +34,7 @@ namespace Amazon.FIS
     public partial class AmazonFISConfig : ClientConfig
     {
         private static readonly string UserAgentString =
-            InternalSDKUtils.BuildUserAgentString("fis", "3.7.302.27");
+            InternalSDKUtils.BuildUserAgentString("fis", "4.0.0.0");
 
         private static readonly AmazonFISEndpointResolver EndpointResolver =
             new AmazonFISEndpointResolver();
diff --git a/sdk/src/Services/FIS/Properties/AssemblyInfo.cs b/sdk/src/Services/FIS/Properties/AssemblyInfo.cs
index 69dd8df5ee5c..187c27645c30 100644
--- a/sdk/src/Services/FIS/Properties/AssemblyInfo.cs
+++ b/sdk/src/Services/FIS/Properties/AssemblyInfo.cs
@@ -41,5 +41,9 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.302.27")]
\ No newline at end of file
+#if BCL
+[assembly: AssemblyVersion("4.0")]
+#else
+[assembly: AssemblyVersion("4.0.0.0")]
+#endif
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/src/Services/FMS/AWSSDK.FMS.NetFramework.csproj b/sdk/src/Services/FMS/AWSSDK.FMS.NetFramework.csproj
index a5d57e715cf6..e8b2aaf6ac88 100644
--- a/sdk/src/Services/FMS/AWSSDK.FMS.NetFramework.csproj
+++ b/sdk/src/Services/FMS/AWSSDK.FMS.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);BCL;AWS_ASYNC_API;CODE_ANALYSIS</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(RuleSetFileForBuild)' == 'false' Or '$(RuleSetFileForBuild)' == '' ">
diff --git a/sdk/src/Services/FMS/AWSSDK.FMS.NetStandard.csproj b/sdk/src/Services/FMS/AWSSDK.FMS.NetStandard.csproj
index 1424bb681711..0e3bd13ec873 100644
--- a/sdk/src/Services/FMS/AWSSDK.FMS.NetStandard.csproj
+++ b/sdk/src/Services/FMS/AWSSDK.FMS.NetStandard.csproj
@@ -22,6 +22,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <!-- Async Enumerable Compatibility -->
diff --git a/sdk/src/Services/FMS/Generated/AmazonFMSConfig.cs b/sdk/src/Services/FMS/Generated/AmazonFMSConfig.cs
index c1e4fcd89572..190a43968f08 100644
--- a/sdk/src/Services/FMS/Generated/AmazonFMSConfig.cs
+++ b/sdk/src/Services/FMS/Generated/AmazonFMSConfig.cs
@@ -34,7 +34,7 @@ namespace Amazon.FMS
     public partial class AmazonFMSConfig : ClientConfig
     {
         private static readonly string UserAgentString =
-            InternalSDKUtils.BuildUserAgentString("FMS", "3.7.302.0");
+            InternalSDKUtils.BuildUserAgentString("FMS", "4.0.0.0");
 
         private static readonly AmazonFMSEndpointResolver EndpointResolver =
             new AmazonFMSEndpointResolver();
diff --git a/sdk/src/Services/FMS/Properties/AssemblyInfo.cs b/sdk/src/Services/FMS/Properties/AssemblyInfo.cs
index 86f1614c8b78..6029d942ebc5 100644
--- a/sdk/src/Services/FMS/Properties/AssemblyInfo.cs
+++ b/sdk/src/Services/FMS/Properties/AssemblyInfo.cs
@@ -41,5 +41,9 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.302.0")]
\ No newline at end of file
+#if BCL
+[assembly: AssemblyVersion("4.0")]
+#else
+[assembly: AssemblyVersion("4.0.0.0")]
+#endif
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/src/Services/FSx/AWSSDK.FSx.NetFramework.csproj b/sdk/src/Services/FSx/AWSSDK.FSx.NetFramework.csproj
index 1fcd6091da34..397b2a3a0d9e 100644
--- a/sdk/src/Services/FSx/AWSSDK.FSx.NetFramework.csproj
+++ b/sdk/src/Services/FSx/AWSSDK.FSx.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);BCL;AWS_ASYNC_API;CODE_ANALYSIS</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(RuleSetFileForBuild)' == 'false' Or '$(RuleSetFileForBuild)' == '' ">
diff --git a/sdk/src/Services/FSx/AWSSDK.FSx.NetStandard.csproj b/sdk/src/Services/FSx/AWSSDK.FSx.NetStandard.csproj
index 4ed9aab91d4e..a4bdf384c83f 100644
--- a/sdk/src/Services/FSx/AWSSDK.FSx.NetStandard.csproj
+++ b/sdk/src/Services/FSx/AWSSDK.FSx.NetStandard.csproj
@@ -22,6 +22,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <!-- Async Enumerable Compatibility -->
diff --git a/sdk/src/Services/FSx/Generated/AmazonFSxConfig.cs b/sdk/src/Services/FSx/Generated/AmazonFSxConfig.cs
index 3aed31024129..123b16ba7bee 100644
--- a/sdk/src/Services/FSx/Generated/AmazonFSxConfig.cs
+++ b/sdk/src/Services/FSx/Generated/AmazonFSxConfig.cs
@@ -34,7 +34,7 @@ namespace Amazon.FSx
     public partial class AmazonFSxConfig : ClientConfig
     {
         private static readonly string UserAgentString =
-            InternalSDKUtils.BuildUserAgentString("FSx", "3.7.304.30");
+            InternalSDKUtils.BuildUserAgentString("FSx", "4.0.0.0");
 
         private static readonly AmazonFSxEndpointResolver EndpointResolver =
             new AmazonFSxEndpointResolver();
diff --git a/sdk/src/Services/FSx/Properties/AssemblyInfo.cs b/sdk/src/Services/FSx/Properties/AssemblyInfo.cs
index 91cea701c9b5..dba604af7528 100644
--- a/sdk/src/Services/FSx/Properties/AssemblyInfo.cs
+++ b/sdk/src/Services/FSx/Properties/AssemblyInfo.cs
@@ -41,5 +41,9 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.304.30")]
\ No newline at end of file
+#if BCL
+[assembly: AssemblyVersion("4.0")]
+#else
+[assembly: AssemblyVersion("4.0.0.0")]
+#endif
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/src/Services/FinSpaceData/AWSSDK.FinSpaceData.NetFramework.csproj b/sdk/src/Services/FinSpaceData/AWSSDK.FinSpaceData.NetFramework.csproj
index 8bd45e1510e0..00340e820287 100644
--- a/sdk/src/Services/FinSpaceData/AWSSDK.FinSpaceData.NetFramework.csproj
+++ b/sdk/src/Services/FinSpaceData/AWSSDK.FinSpaceData.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);BCL;AWS_ASYNC_API;CODE_ANALYSIS</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(RuleSetFileForBuild)' == 'false' Or '$(RuleSetFileForBuild)' == '' ">
diff --git a/sdk/src/Services/FinSpaceData/AWSSDK.FinSpaceData.NetStandard.csproj b/sdk/src/Services/FinSpaceData/AWSSDK.FinSpaceData.NetStandard.csproj
index 91c1ed01e761..3696ccc73149 100644
--- a/sdk/src/Services/FinSpaceData/AWSSDK.FinSpaceData.NetStandard.csproj
+++ b/sdk/src/Services/FinSpaceData/AWSSDK.FinSpaceData.NetStandard.csproj
@@ -22,6 +22,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <!-- Async Enumerable Compatibility -->
diff --git a/sdk/src/Services/FinSpaceData/Generated/AmazonFinSpaceDataConfig.cs b/sdk/src/Services/FinSpaceData/Generated/AmazonFinSpaceDataConfig.cs
index e760fbe4a38e..299d910b4fcb 100644
--- a/sdk/src/Services/FinSpaceData/Generated/AmazonFinSpaceDataConfig.cs
+++ b/sdk/src/Services/FinSpaceData/Generated/AmazonFinSpaceDataConfig.cs
@@ -34,7 +34,7 @@ namespace Amazon.FinSpaceData
     public partial class AmazonFinSpaceDataConfig : ClientConfig
     {
         private static readonly string UserAgentString =
-            InternalSDKUtils.BuildUserAgentString("finspace data", "3.7.301.81");
+            InternalSDKUtils.BuildUserAgentString("finspace data", "4.0.0.0");
 
         private static readonly AmazonFinSpaceDataEndpointResolver EndpointResolver =
             new AmazonFinSpaceDataEndpointResolver();
diff --git a/sdk/src/Services/FinSpaceData/Properties/AssemblyInfo.cs b/sdk/src/Services/FinSpaceData/Properties/AssemblyInfo.cs
index 756112858e00..c8854d505092 100644
--- a/sdk/src/Services/FinSpaceData/Properties/AssemblyInfo.cs
+++ b/sdk/src/Services/FinSpaceData/Properties/AssemblyInfo.cs
@@ -41,5 +41,9 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.301.81")]
\ No newline at end of file
+#if BCL
+[assembly: AssemblyVersion("4.0")]
+#else
+[assembly: AssemblyVersion("4.0.0.0")]
+#endif
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/src/Services/Finspace/AWSSDK.Finspace.NetFramework.csproj b/sdk/src/Services/Finspace/AWSSDK.Finspace.NetFramework.csproj
index 3d72b1a76962..f9a51428b8bb 100644
--- a/sdk/src/Services/Finspace/AWSSDK.Finspace.NetFramework.csproj
+++ b/sdk/src/Services/Finspace/AWSSDK.Finspace.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);BCL;AWS_ASYNC_API;CODE_ANALYSIS</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(RuleSetFileForBuild)' == 'false' Or '$(RuleSetFileForBuild)' == '' ">
diff --git a/sdk/src/Services/Finspace/AWSSDK.Finspace.NetStandard.csproj b/sdk/src/Services/Finspace/AWSSDK.Finspace.NetStandard.csproj
index 992f07ad6496..5feb64f2691a 100644
--- a/sdk/src/Services/Finspace/AWSSDK.Finspace.NetStandard.csproj
+++ b/sdk/src/Services/Finspace/AWSSDK.Finspace.NetStandard.csproj
@@ -22,6 +22,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <!-- Async Enumerable Compatibility -->
diff --git a/sdk/src/Services/Finspace/Generated/AmazonFinspaceConfig.cs b/sdk/src/Services/Finspace/Generated/AmazonFinspaceConfig.cs
index 58be8a821fa9..c347dfcaa2d8 100644
--- a/sdk/src/Services/Finspace/Generated/AmazonFinspaceConfig.cs
+++ b/sdk/src/Services/Finspace/Generated/AmazonFinspaceConfig.cs
@@ -34,7 +34,7 @@ namespace Amazon.Finspace
     public partial class AmazonFinspaceConfig : ClientConfig
     {
         private static readonly string UserAgentString =
-            InternalSDKUtils.BuildUserAgentString("finspace", "3.7.306.22");
+            InternalSDKUtils.BuildUserAgentString("finspace", "4.0.0.0");
 
         private static readonly AmazonFinspaceEndpointResolver EndpointResolver =
             new AmazonFinspaceEndpointResolver();
diff --git a/sdk/src/Services/Finspace/Properties/AssemblyInfo.cs b/sdk/src/Services/Finspace/Properties/AssemblyInfo.cs
index 0c2d0e550caa..6631fb5b92e4 100644
--- a/sdk/src/Services/Finspace/Properties/AssemblyInfo.cs
+++ b/sdk/src/Services/Finspace/Properties/AssemblyInfo.cs
@@ -41,5 +41,9 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.306.22")]
\ No newline at end of file
+#if BCL
+[assembly: AssemblyVersion("4.0")]
+#else
+[assembly: AssemblyVersion("4.0.0.0")]
+#endif
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/src/Services/ForecastQueryService/AWSSDK.ForecastQueryService.NetFramework.csproj b/sdk/src/Services/ForecastQueryService/AWSSDK.ForecastQueryService.NetFramework.csproj
index 76dab3207ee6..db955b1b73ff 100644
--- a/sdk/src/Services/ForecastQueryService/AWSSDK.ForecastQueryService.NetFramework.csproj
+++ b/sdk/src/Services/ForecastQueryService/AWSSDK.ForecastQueryService.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);BCL;AWS_ASYNC_API;CODE_ANALYSIS</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(RuleSetFileForBuild)' == 'false' Or '$(RuleSetFileForBuild)' == '' ">
diff --git a/sdk/src/Services/ForecastQueryService/AWSSDK.ForecastQueryService.NetStandard.csproj b/sdk/src/Services/ForecastQueryService/AWSSDK.ForecastQueryService.NetStandard.csproj
index e77c32dc6519..5f28bb2bad61 100644
--- a/sdk/src/Services/ForecastQueryService/AWSSDK.ForecastQueryService.NetStandard.csproj
+++ b/sdk/src/Services/ForecastQueryService/AWSSDK.ForecastQueryService.NetStandard.csproj
@@ -22,6 +22,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <!-- Async Enumerable Compatibility -->
diff --git a/sdk/src/Services/ForecastQueryService/Generated/AmazonForecastQueryServiceConfig.cs b/sdk/src/Services/ForecastQueryService/Generated/AmazonForecastQueryServiceConfig.cs
index 59565f1ff532..e1146f01029a 100644
--- a/sdk/src/Services/ForecastQueryService/Generated/AmazonForecastQueryServiceConfig.cs
+++ b/sdk/src/Services/ForecastQueryService/Generated/AmazonForecastQueryServiceConfig.cs
@@ -34,7 +34,7 @@ namespace Amazon.ForecastQueryService
     public partial class AmazonForecastQueryServiceConfig : ClientConfig
     {
         private static readonly string UserAgentString =
-            InternalSDKUtils.BuildUserAgentString("forecastquery", "3.7.300.84");
+            InternalSDKUtils.BuildUserAgentString("forecastquery", "4.0.0.0");
 
         private static readonly AmazonForecastQueryServiceEndpointResolver EndpointResolver =
             new AmazonForecastQueryServiceEndpointResolver();
diff --git a/sdk/src/Services/ForecastQueryService/Properties/AssemblyInfo.cs b/sdk/src/Services/ForecastQueryService/Properties/AssemblyInfo.cs
index 9e82d697c1b5..2cc08db5740f 100644
--- a/sdk/src/Services/ForecastQueryService/Properties/AssemblyInfo.cs
+++ b/sdk/src/Services/ForecastQueryService/Properties/AssemblyInfo.cs
@@ -41,5 +41,9 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.300.84")]
\ No newline at end of file
+#if BCL
+[assembly: AssemblyVersion("4.0")]
+#else
+[assembly: AssemblyVersion("4.0.0.0")]
+#endif
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/src/Services/ForecastService/AWSSDK.ForecastService.NetFramework.csproj b/sdk/src/Services/ForecastService/AWSSDK.ForecastService.NetFramework.csproj
index fe48061b4017..219da01d72bf 100644
--- a/sdk/src/Services/ForecastService/AWSSDK.ForecastService.NetFramework.csproj
+++ b/sdk/src/Services/ForecastService/AWSSDK.ForecastService.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);BCL;AWS_ASYNC_API;CODE_ANALYSIS</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(RuleSetFileForBuild)' == 'false' Or '$(RuleSetFileForBuild)' == '' ">
diff --git a/sdk/src/Services/ForecastService/AWSSDK.ForecastService.NetStandard.csproj b/sdk/src/Services/ForecastService/AWSSDK.ForecastService.NetStandard.csproj
index 4e3b1551f649..a871171f9d7f 100644
--- a/sdk/src/Services/ForecastService/AWSSDK.ForecastService.NetStandard.csproj
+++ b/sdk/src/Services/ForecastService/AWSSDK.ForecastService.NetStandard.csproj
@@ -22,6 +22,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <!-- Async Enumerable Compatibility -->
diff --git a/sdk/src/Services/ForecastService/Generated/AmazonForecastServiceConfig.cs b/sdk/src/Services/ForecastService/Generated/AmazonForecastServiceConfig.cs
index 030253525698..2c4cda8cae99 100644
--- a/sdk/src/Services/ForecastService/Generated/AmazonForecastServiceConfig.cs
+++ b/sdk/src/Services/ForecastService/Generated/AmazonForecastServiceConfig.cs
@@ -34,7 +34,7 @@ namespace Amazon.ForecastService
     public partial class AmazonForecastServiceConfig : ClientConfig
     {
         private static readonly string UserAgentString =
-            InternalSDKUtils.BuildUserAgentString("forecast", "3.7.300.84");
+            InternalSDKUtils.BuildUserAgentString("forecast", "4.0.0.0");
 
         private static readonly AmazonForecastServiceEndpointResolver EndpointResolver =
             new AmazonForecastServiceEndpointResolver();
diff --git a/sdk/src/Services/ForecastService/Properties/AssemblyInfo.cs b/sdk/src/Services/ForecastService/Properties/AssemblyInfo.cs
index af17e74b31b7..2a84525b4c8a 100644
--- a/sdk/src/Services/ForecastService/Properties/AssemblyInfo.cs
+++ b/sdk/src/Services/ForecastService/Properties/AssemblyInfo.cs
@@ -41,5 +41,9 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.300.84")]
\ No newline at end of file
+#if BCL
+[assembly: AssemblyVersion("4.0")]
+#else
+[assembly: AssemblyVersion("4.0.0.0")]
+#endif
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/src/Services/FraudDetector/AWSSDK.FraudDetector.NetFramework.csproj b/sdk/src/Services/FraudDetector/AWSSDK.FraudDetector.NetFramework.csproj
index 258b353f5d08..98ead8e62c01 100644
--- a/sdk/src/Services/FraudDetector/AWSSDK.FraudDetector.NetFramework.csproj
+++ b/sdk/src/Services/FraudDetector/AWSSDK.FraudDetector.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);BCL;AWS_ASYNC_API;CODE_ANALYSIS</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(RuleSetFileForBuild)' == 'false' Or '$(RuleSetFileForBuild)' == '' ">
diff --git a/sdk/src/Services/FraudDetector/AWSSDK.FraudDetector.NetStandard.csproj b/sdk/src/Services/FraudDetector/AWSSDK.FraudDetector.NetStandard.csproj
index eaea34e96dfe..51031acb60ad 100644
--- a/sdk/src/Services/FraudDetector/AWSSDK.FraudDetector.NetStandard.csproj
+++ b/sdk/src/Services/FraudDetector/AWSSDK.FraudDetector.NetStandard.csproj
@@ -22,6 +22,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <!-- Async Enumerable Compatibility -->
diff --git a/sdk/src/Services/FraudDetector/Generated/AmazonFraudDetectorConfig.cs b/sdk/src/Services/FraudDetector/Generated/AmazonFraudDetectorConfig.cs
index 8730bb676415..76180ecc070d 100644
--- a/sdk/src/Services/FraudDetector/Generated/AmazonFraudDetectorConfig.cs
+++ b/sdk/src/Services/FraudDetector/Generated/AmazonFraudDetectorConfig.cs
@@ -34,7 +34,7 @@ namespace Amazon.FraudDetector
     public partial class AmazonFraudDetectorConfig : ClientConfig
     {
         private static readonly string UserAgentString =
-            InternalSDKUtils.BuildUserAgentString("FraudDetector", "3.7.300.84");
+            InternalSDKUtils.BuildUserAgentString("FraudDetector", "4.0.0.0");
 
         private static readonly AmazonFraudDetectorEndpointResolver EndpointResolver =
             new AmazonFraudDetectorEndpointResolver();
diff --git a/sdk/src/Services/FraudDetector/Properties/AssemblyInfo.cs b/sdk/src/Services/FraudDetector/Properties/AssemblyInfo.cs
index 1a3b8fa5e910..20870772b5df 100644
--- a/sdk/src/Services/FraudDetector/Properties/AssemblyInfo.cs
+++ b/sdk/src/Services/FraudDetector/Properties/AssemblyInfo.cs
@@ -41,5 +41,9 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.300.84")]
\ No newline at end of file
+#if BCL
+[assembly: AssemblyVersion("4.0")]
+#else
+[assembly: AssemblyVersion("4.0.0.0")]
+#endif
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/src/Services/FreeTier/AWSSDK.FreeTier.NetFramework.csproj b/sdk/src/Services/FreeTier/AWSSDK.FreeTier.NetFramework.csproj
index b831ab98a499..3321f140f5dd 100644
--- a/sdk/src/Services/FreeTier/AWSSDK.FreeTier.NetFramework.csproj
+++ b/sdk/src/Services/FreeTier/AWSSDK.FreeTier.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);BCL;AWS_ASYNC_API;CODE_ANALYSIS</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(RuleSetFileForBuild)' == 'false' Or '$(RuleSetFileForBuild)' == '' ">
diff --git a/sdk/src/Services/FreeTier/AWSSDK.FreeTier.NetStandard.csproj b/sdk/src/Services/FreeTier/AWSSDK.FreeTier.NetStandard.csproj
index 7a08dd4a8acf..bab22bea18b5 100644
--- a/sdk/src/Services/FreeTier/AWSSDK.FreeTier.NetStandard.csproj
+++ b/sdk/src/Services/FreeTier/AWSSDK.FreeTier.NetStandard.csproj
@@ -22,6 +22,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <!-- Async Enumerable Compatibility -->
diff --git a/sdk/src/Services/FreeTier/Generated/AmazonFreeTierConfig.cs b/sdk/src/Services/FreeTier/Generated/AmazonFreeTierConfig.cs
index 6f647762a90c..b62398401906 100644
--- a/sdk/src/Services/FreeTier/Generated/AmazonFreeTierConfig.cs
+++ b/sdk/src/Services/FreeTier/Generated/AmazonFreeTierConfig.cs
@@ -34,7 +34,7 @@ namespace Amazon.FreeTier
     public partial class AmazonFreeTierConfig : ClientConfig
     {
         private static readonly string UserAgentString =
-            InternalSDKUtils.BuildUserAgentString("FreeTier", "3.7.300.76");
+            InternalSDKUtils.BuildUserAgentString("FreeTier", "4.0.0.0");
 
         private static readonly AmazonFreeTierEndpointResolver EndpointResolver =
             new AmazonFreeTierEndpointResolver();
diff --git a/sdk/src/Services/FreeTier/Properties/AssemblyInfo.cs b/sdk/src/Services/FreeTier/Properties/AssemblyInfo.cs
index 12fb63181f59..ae0a5b79ac44 100644
--- a/sdk/src/Services/FreeTier/Properties/AssemblyInfo.cs
+++ b/sdk/src/Services/FreeTier/Properties/AssemblyInfo.cs
@@ -41,5 +41,9 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.300.76")]
\ No newline at end of file
+#if BCL
+[assembly: AssemblyVersion("4.0")]
+#else
+[assembly: AssemblyVersion("4.0.0.0")]
+#endif
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/src/Services/GameLift/AWSSDK.GameLift.NetFramework.csproj b/sdk/src/Services/GameLift/AWSSDK.GameLift.NetFramework.csproj
index 9d941bef9367..9a30e2726716 100644
--- a/sdk/src/Services/GameLift/AWSSDK.GameLift.NetFramework.csproj
+++ b/sdk/src/Services/GameLift/AWSSDK.GameLift.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);BCL;AWS_ASYNC_API;CODE_ANALYSIS</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(RuleSetFileForBuild)' == 'false' Or '$(RuleSetFileForBuild)' == '' ">
diff --git a/sdk/src/Services/GameLift/AWSSDK.GameLift.NetStandard.csproj b/sdk/src/Services/GameLift/AWSSDK.GameLift.NetStandard.csproj
index 4a0158311ffd..85342498bf7d 100644
--- a/sdk/src/Services/GameLift/AWSSDK.GameLift.NetStandard.csproj
+++ b/sdk/src/Services/GameLift/AWSSDK.GameLift.NetStandard.csproj
@@ -22,6 +22,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <!-- Async Enumerable Compatibility -->
diff --git a/sdk/src/Services/GameLift/Generated/AmazonGameLiftConfig.cs b/sdk/src/Services/GameLift/Generated/AmazonGameLiftConfig.cs
index fdab0cb666a5..4a260611c822 100644
--- a/sdk/src/Services/GameLift/Generated/AmazonGameLiftConfig.cs
+++ b/sdk/src/Services/GameLift/Generated/AmazonGameLiftConfig.cs
@@ -34,7 +34,7 @@ namespace Amazon.GameLift
     public partial class AmazonGameLiftConfig : ClientConfig
     {
         private static readonly string UserAgentString =
-            InternalSDKUtils.BuildUserAgentString("GameLift", "3.7.302.3");
+            InternalSDKUtils.BuildUserAgentString("GameLift", "4.0.0.0");
 
         private static readonly AmazonGameLiftEndpointResolver EndpointResolver =
             new AmazonGameLiftEndpointResolver();
diff --git a/sdk/src/Services/GameLift/Properties/AssemblyInfo.cs b/sdk/src/Services/GameLift/Properties/AssemblyInfo.cs
index 2a2b50727435..34e54932d8a3 100644
--- a/sdk/src/Services/GameLift/Properties/AssemblyInfo.cs
+++ b/sdk/src/Services/GameLift/Properties/AssemblyInfo.cs
@@ -41,5 +41,9 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.302.3")]
\ No newline at end of file
+#if BCL
+[assembly: AssemblyVersion("4.0")]
+#else
+[assembly: AssemblyVersion("4.0.0.0")]
+#endif
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/src/Services/Glacier/AWSSDK.Glacier.NetFramework.csproj b/sdk/src/Services/Glacier/AWSSDK.Glacier.NetFramework.csproj
index 9ea2386f0d86..fd46df981f50 100644
--- a/sdk/src/Services/Glacier/AWSSDK.Glacier.NetFramework.csproj
+++ b/sdk/src/Services/Glacier/AWSSDK.Glacier.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);BCL;AWS_ASYNC_API;CODE_ANALYSIS</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(RuleSetFileForBuild)' == 'false' Or '$(RuleSetFileForBuild)' == '' ">
diff --git a/sdk/src/Services/Glacier/AWSSDK.Glacier.NetStandard.csproj b/sdk/src/Services/Glacier/AWSSDK.Glacier.NetStandard.csproj
index fd937cf14efa..5b59cda9af8f 100644
--- a/sdk/src/Services/Glacier/AWSSDK.Glacier.NetStandard.csproj
+++ b/sdk/src/Services/Glacier/AWSSDK.Glacier.NetStandard.csproj
@@ -22,6 +22,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <!-- Async Enumerable Compatibility -->
diff --git a/sdk/src/Services/Glacier/Generated/AmazonGlacierConfig.cs b/sdk/src/Services/Glacier/Generated/AmazonGlacierConfig.cs
index ff7a5fb6f89a..cf5e2ad502b3 100644
--- a/sdk/src/Services/Glacier/Generated/AmazonGlacierConfig.cs
+++ b/sdk/src/Services/Glacier/Generated/AmazonGlacierConfig.cs
@@ -34,7 +34,7 @@ namespace Amazon.Glacier
     public partial class AmazonGlacierConfig : ClientConfig
     {
         private static readonly string UserAgentString =
-            InternalSDKUtils.BuildUserAgentString("Glacier", "3.7.300.84");
+            InternalSDKUtils.BuildUserAgentString("Glacier", "4.0.0.0");
 
         private static readonly AmazonGlacierEndpointResolver EndpointResolver =
             new AmazonGlacierEndpointResolver();
diff --git a/sdk/src/Services/Glacier/Properties/AssemblyInfo.cs b/sdk/src/Services/Glacier/Properties/AssemblyInfo.cs
index 0a443d276a0e..4f3ca596d2b7 100644
--- a/sdk/src/Services/Glacier/Properties/AssemblyInfo.cs
+++ b/sdk/src/Services/Glacier/Properties/AssemblyInfo.cs
@@ -41,5 +41,9 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.300.84")]
\ No newline at end of file
+#if BCL
+[assembly: AssemblyVersion("4.0")]
+#else
+[assembly: AssemblyVersion("4.0.0.0")]
+#endif
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/src/Services/GlobalAccelerator/AWSSDK.GlobalAccelerator.NetFramework.csproj b/sdk/src/Services/GlobalAccelerator/AWSSDK.GlobalAccelerator.NetFramework.csproj
index a68de28957a2..0a995e5fa941 100644
--- a/sdk/src/Services/GlobalAccelerator/AWSSDK.GlobalAccelerator.NetFramework.csproj
+++ b/sdk/src/Services/GlobalAccelerator/AWSSDK.GlobalAccelerator.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);BCL;AWS_ASYNC_API;CODE_ANALYSIS</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(RuleSetFileForBuild)' == 'false' Or '$(RuleSetFileForBuild)' == '' ">
diff --git a/sdk/src/Services/GlobalAccelerator/AWSSDK.GlobalAccelerator.NetStandard.csproj b/sdk/src/Services/GlobalAccelerator/AWSSDK.GlobalAccelerator.NetStandard.csproj
index 0d070a12c2dd..5d32c447fb73 100644
--- a/sdk/src/Services/GlobalAccelerator/AWSSDK.GlobalAccelerator.NetStandard.csproj
+++ b/sdk/src/Services/GlobalAccelerator/AWSSDK.GlobalAccelerator.NetStandard.csproj
@@ -22,6 +22,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <!-- Async Enumerable Compatibility -->
diff --git a/sdk/src/Services/GlobalAccelerator/Generated/AmazonGlobalAcceleratorConfig.cs b/sdk/src/Services/GlobalAccelerator/Generated/AmazonGlobalAcceleratorConfig.cs
index fdefe460e78f..f67be96cd90b 100644
--- a/sdk/src/Services/GlobalAccelerator/Generated/AmazonGlobalAcceleratorConfig.cs
+++ b/sdk/src/Services/GlobalAccelerator/Generated/AmazonGlobalAcceleratorConfig.cs
@@ -34,7 +34,7 @@ namespace Amazon.GlobalAccelerator
     public partial class AmazonGlobalAcceleratorConfig : ClientConfig
     {
         private static readonly string UserAgentString =
-            InternalSDKUtils.BuildUserAgentString("Global Accelerator", "3.7.301.23");
+            InternalSDKUtils.BuildUserAgentString("Global Accelerator", "4.0.0.0");
 
         private static readonly AmazonGlobalAcceleratorEndpointResolver EndpointResolver =
             new AmazonGlobalAcceleratorEndpointResolver();
diff --git a/sdk/src/Services/GlobalAccelerator/Properties/AssemblyInfo.cs b/sdk/src/Services/GlobalAccelerator/Properties/AssemblyInfo.cs
index 0a825156e753..0ce383862b99 100644
--- a/sdk/src/Services/GlobalAccelerator/Properties/AssemblyInfo.cs
+++ b/sdk/src/Services/GlobalAccelerator/Properties/AssemblyInfo.cs
@@ -41,5 +41,9 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.301.23")]
\ No newline at end of file
+#if BCL
+[assembly: AssemblyVersion("4.0")]
+#else
+[assembly: AssemblyVersion("4.0.0.0")]
+#endif
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/src/Services/Glue/AWSSDK.Glue.NetFramework.csproj b/sdk/src/Services/Glue/AWSSDK.Glue.NetFramework.csproj
index a7ef87ad4166..feb9877f2ccb 100644
--- a/sdk/src/Services/Glue/AWSSDK.Glue.NetFramework.csproj
+++ b/sdk/src/Services/Glue/AWSSDK.Glue.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);BCL;AWS_ASYNC_API;CODE_ANALYSIS</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(RuleSetFileForBuild)' == 'false' Or '$(RuleSetFileForBuild)' == '' ">
diff --git a/sdk/src/Services/Glue/AWSSDK.Glue.NetStandard.csproj b/sdk/src/Services/Glue/AWSSDK.Glue.NetStandard.csproj
index 8fd53ac74c52..c2761e43321d 100644
--- a/sdk/src/Services/Glue/AWSSDK.Glue.NetStandard.csproj
+++ b/sdk/src/Services/Glue/AWSSDK.Glue.NetStandard.csproj
@@ -22,6 +22,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <!-- Async Enumerable Compatibility -->
diff --git a/sdk/src/Services/Glue/Generated/AmazonGlueConfig.cs b/sdk/src/Services/Glue/Generated/AmazonGlueConfig.cs
index bc5b5f4f00c6..4e689786d077 100644
--- a/sdk/src/Services/Glue/Generated/AmazonGlueConfig.cs
+++ b/sdk/src/Services/Glue/Generated/AmazonGlueConfig.cs
@@ -34,7 +34,7 @@ namespace Amazon.Glue
     public partial class AmazonGlueConfig : ClientConfig
     {
         private static readonly string UserAgentString =
-            InternalSDKUtils.BuildUserAgentString("Glue", "3.7.310.6");
+            InternalSDKUtils.BuildUserAgentString("Glue", "4.0.0.0");
 
         private static readonly AmazonGlueEndpointResolver EndpointResolver =
             new AmazonGlueEndpointResolver();
diff --git a/sdk/src/Services/Glue/Properties/AssemblyInfo.cs b/sdk/src/Services/Glue/Properties/AssemblyInfo.cs
index 15ecbd3dba26..92c3f5664a6d 100644
--- a/sdk/src/Services/Glue/Properties/AssemblyInfo.cs
+++ b/sdk/src/Services/Glue/Properties/AssemblyInfo.cs
@@ -41,5 +41,9 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.310.6")]
\ No newline at end of file
+#if BCL
+[assembly: AssemblyVersion("4.0")]
+#else
+[assembly: AssemblyVersion("4.0.0.0")]
+#endif
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/src/Services/GlueDataBrew/AWSSDK.GlueDataBrew.NetFramework.csproj b/sdk/src/Services/GlueDataBrew/AWSSDK.GlueDataBrew.NetFramework.csproj
index 02aed33c5cab..d5da2325788b 100644
--- a/sdk/src/Services/GlueDataBrew/AWSSDK.GlueDataBrew.NetFramework.csproj
+++ b/sdk/src/Services/GlueDataBrew/AWSSDK.GlueDataBrew.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);BCL;AWS_ASYNC_API;CODE_ANALYSIS</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(RuleSetFileForBuild)' == 'false' Or '$(RuleSetFileForBuild)' == '' ">
diff --git a/sdk/src/Services/GlueDataBrew/AWSSDK.GlueDataBrew.NetStandard.csproj b/sdk/src/Services/GlueDataBrew/AWSSDK.GlueDataBrew.NetStandard.csproj
index 31116c67a44c..693755fdd5d6 100644
--- a/sdk/src/Services/GlueDataBrew/AWSSDK.GlueDataBrew.NetStandard.csproj
+++ b/sdk/src/Services/GlueDataBrew/AWSSDK.GlueDataBrew.NetStandard.csproj
@@ -22,6 +22,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <!-- Async Enumerable Compatibility -->
diff --git a/sdk/src/Services/GlueDataBrew/Generated/AmazonGlueDataBrewConfig.cs b/sdk/src/Services/GlueDataBrew/Generated/AmazonGlueDataBrewConfig.cs
index 26eba79f5525..86543b314150 100644
--- a/sdk/src/Services/GlueDataBrew/Generated/AmazonGlueDataBrewConfig.cs
+++ b/sdk/src/Services/GlueDataBrew/Generated/AmazonGlueDataBrewConfig.cs
@@ -34,7 +34,7 @@ namespace Amazon.GlueDataBrew
     public partial class AmazonGlueDataBrewConfig : ClientConfig
     {
         private static readonly string UserAgentString =
-            InternalSDKUtils.BuildUserAgentString("DataBrew", "3.7.300.84");
+            InternalSDKUtils.BuildUserAgentString("DataBrew", "4.0.0.0");
 
         private static readonly AmazonGlueDataBrewEndpointResolver EndpointResolver =
             new AmazonGlueDataBrewEndpointResolver();
diff --git a/sdk/src/Services/GlueDataBrew/Properties/AssemblyInfo.cs b/sdk/src/Services/GlueDataBrew/Properties/AssemblyInfo.cs
index be66d1d5b0e7..a78c9087ab26 100644
--- a/sdk/src/Services/GlueDataBrew/Properties/AssemblyInfo.cs
+++ b/sdk/src/Services/GlueDataBrew/Properties/AssemblyInfo.cs
@@ -41,5 +41,9 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.300.84")]
\ No newline at end of file
+#if BCL
+[assembly: AssemblyVersion("4.0")]
+#else
+[assembly: AssemblyVersion("4.0.0.0")]
+#endif
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/src/Services/Greengrass/AWSSDK.Greengrass.NetFramework.csproj b/sdk/src/Services/Greengrass/AWSSDK.Greengrass.NetFramework.csproj
index c56a7a1c01fd..40659448dbf0 100644
--- a/sdk/src/Services/Greengrass/AWSSDK.Greengrass.NetFramework.csproj
+++ b/sdk/src/Services/Greengrass/AWSSDK.Greengrass.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);BCL;AWS_ASYNC_API;CODE_ANALYSIS</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(RuleSetFileForBuild)' == 'false' Or '$(RuleSetFileForBuild)' == '' ">
diff --git a/sdk/src/Services/Greengrass/AWSSDK.Greengrass.NetStandard.csproj b/sdk/src/Services/Greengrass/AWSSDK.Greengrass.NetStandard.csproj
index 7d5dcff09571..dbec2b7f4be2 100644
--- a/sdk/src/Services/Greengrass/AWSSDK.Greengrass.NetStandard.csproj
+++ b/sdk/src/Services/Greengrass/AWSSDK.Greengrass.NetStandard.csproj
@@ -22,6 +22,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <!-- Async Enumerable Compatibility -->
diff --git a/sdk/src/Services/Greengrass/Generated/AmazonGreengrassConfig.cs b/sdk/src/Services/Greengrass/Generated/AmazonGreengrassConfig.cs
index 6b81ab5f92f4..c126ab480010 100644
--- a/sdk/src/Services/Greengrass/Generated/AmazonGreengrassConfig.cs
+++ b/sdk/src/Services/Greengrass/Generated/AmazonGreengrassConfig.cs
@@ -34,7 +34,7 @@ namespace Amazon.Greengrass
     public partial class AmazonGreengrassConfig : ClientConfig
     {
         private static readonly string UserAgentString =
-            InternalSDKUtils.BuildUserAgentString("Greengrass", "3.7.300.84");
+            InternalSDKUtils.BuildUserAgentString("Greengrass", "4.0.0.0");
 
         private static readonly AmazonGreengrassEndpointResolver EndpointResolver =
             new AmazonGreengrassEndpointResolver();
diff --git a/sdk/src/Services/Greengrass/Properties/AssemblyInfo.cs b/sdk/src/Services/Greengrass/Properties/AssemblyInfo.cs
index e7140739acd9..bc66538a9dae 100644
--- a/sdk/src/Services/Greengrass/Properties/AssemblyInfo.cs
+++ b/sdk/src/Services/Greengrass/Properties/AssemblyInfo.cs
@@ -41,5 +41,9 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.300.84")]
\ No newline at end of file
+#if BCL
+[assembly: AssemblyVersion("4.0")]
+#else
+[assembly: AssemblyVersion("4.0.0.0")]
+#endif
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/src/Services/GreengrassV2/AWSSDK.GreengrassV2.NetFramework.csproj b/sdk/src/Services/GreengrassV2/AWSSDK.GreengrassV2.NetFramework.csproj
index 69cee50b0b12..3e6b028171a7 100644
--- a/sdk/src/Services/GreengrassV2/AWSSDK.GreengrassV2.NetFramework.csproj
+++ b/sdk/src/Services/GreengrassV2/AWSSDK.GreengrassV2.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);BCL;AWS_ASYNC_API;CODE_ANALYSIS</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(RuleSetFileForBuild)' == 'false' Or '$(RuleSetFileForBuild)' == '' ">
diff --git a/sdk/src/Services/GreengrassV2/AWSSDK.GreengrassV2.NetStandard.csproj b/sdk/src/Services/GreengrassV2/AWSSDK.GreengrassV2.NetStandard.csproj
index f108051cc77d..346c110a7d6a 100644
--- a/sdk/src/Services/GreengrassV2/AWSSDK.GreengrassV2.NetStandard.csproj
+++ b/sdk/src/Services/GreengrassV2/AWSSDK.GreengrassV2.NetStandard.csproj
@@ -22,6 +22,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <!-- Async Enumerable Compatibility -->
diff --git a/sdk/src/Services/GreengrassV2/Generated/AmazonGreengrassV2Config.cs b/sdk/src/Services/GreengrassV2/Generated/AmazonGreengrassV2Config.cs
index d6ff77984b18..bc81028caf4e 100644
--- a/sdk/src/Services/GreengrassV2/Generated/AmazonGreengrassV2Config.cs
+++ b/sdk/src/Services/GreengrassV2/Generated/AmazonGreengrassV2Config.cs
@@ -34,7 +34,7 @@ namespace Amazon.GreengrassV2
     public partial class AmazonGreengrassV2Config : ClientConfig
     {
         private static readonly string UserAgentString =
-            InternalSDKUtils.BuildUserAgentString("GreengrassV2", "3.7.300.84");
+            InternalSDKUtils.BuildUserAgentString("GreengrassV2", "4.0.0.0");
 
         private static readonly AmazonGreengrassV2EndpointResolver EndpointResolver =
             new AmazonGreengrassV2EndpointResolver();
diff --git a/sdk/src/Services/GreengrassV2/Properties/AssemblyInfo.cs b/sdk/src/Services/GreengrassV2/Properties/AssemblyInfo.cs
index cc56f6548723..bd8c5e04aac2 100644
--- a/sdk/src/Services/GreengrassV2/Properties/AssemblyInfo.cs
+++ b/sdk/src/Services/GreengrassV2/Properties/AssemblyInfo.cs
@@ -41,5 +41,9 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.300.84")]
\ No newline at end of file
+#if BCL
+[assembly: AssemblyVersion("4.0")]
+#else
+[assembly: AssemblyVersion("4.0.0.0")]
+#endif
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/src/Services/GroundStation/AWSSDK.GroundStation.NetFramework.csproj b/sdk/src/Services/GroundStation/AWSSDK.GroundStation.NetFramework.csproj
index 730f2cda4aae..4c1745097d2d 100644
--- a/sdk/src/Services/GroundStation/AWSSDK.GroundStation.NetFramework.csproj
+++ b/sdk/src/Services/GroundStation/AWSSDK.GroundStation.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);BCL;AWS_ASYNC_API;CODE_ANALYSIS</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(RuleSetFileForBuild)' == 'false' Or '$(RuleSetFileForBuild)' == '' ">
diff --git a/sdk/src/Services/GroundStation/AWSSDK.GroundStation.NetStandard.csproj b/sdk/src/Services/GroundStation/AWSSDK.GroundStation.NetStandard.csproj
index 7cae6f89743c..d996663ed516 100644
--- a/sdk/src/Services/GroundStation/AWSSDK.GroundStation.NetStandard.csproj
+++ b/sdk/src/Services/GroundStation/AWSSDK.GroundStation.NetStandard.csproj
@@ -22,6 +22,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <!-- Async Enumerable Compatibility -->
diff --git a/sdk/src/Services/GroundStation/Generated/AmazonGroundStationConfig.cs b/sdk/src/Services/GroundStation/Generated/AmazonGroundStationConfig.cs
index 4e60b47e3182..379a7a359c39 100644
--- a/sdk/src/Services/GroundStation/Generated/AmazonGroundStationConfig.cs
+++ b/sdk/src/Services/GroundStation/Generated/AmazonGroundStationConfig.cs
@@ -34,7 +34,7 @@ namespace Amazon.GroundStation
     public partial class AmazonGroundStationConfig : ClientConfig
     {
         private static readonly string UserAgentString =
-            InternalSDKUtils.BuildUserAgentString("GroundStation", "3.7.301.16");
+            InternalSDKUtils.BuildUserAgentString("GroundStation", "4.0.0.0");
 
         private static readonly AmazonGroundStationEndpointResolver EndpointResolver =
             new AmazonGroundStationEndpointResolver();
diff --git a/sdk/src/Services/GroundStation/Properties/AssemblyInfo.cs b/sdk/src/Services/GroundStation/Properties/AssemblyInfo.cs
index fa7dfd838502..9ac2496b3f50 100644
--- a/sdk/src/Services/GroundStation/Properties/AssemblyInfo.cs
+++ b/sdk/src/Services/GroundStation/Properties/AssemblyInfo.cs
@@ -41,5 +41,9 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.301.16")]
\ No newline at end of file
+#if BCL
+[assembly: AssemblyVersion("4.0")]
+#else
+[assembly: AssemblyVersion("4.0.0.0")]
+#endif
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/src/Services/GuardDuty/AWSSDK.GuardDuty.NetFramework.csproj b/sdk/src/Services/GuardDuty/AWSSDK.GuardDuty.NetFramework.csproj
index fd3d91816f0e..e2d38eca0b16 100644
--- a/sdk/src/Services/GuardDuty/AWSSDK.GuardDuty.NetFramework.csproj
+++ b/sdk/src/Services/GuardDuty/AWSSDK.GuardDuty.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);BCL;AWS_ASYNC_API;CODE_ANALYSIS</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(RuleSetFileForBuild)' == 'false' Or '$(RuleSetFileForBuild)' == '' ">
diff --git a/sdk/src/Services/GuardDuty/AWSSDK.GuardDuty.NetStandard.csproj b/sdk/src/Services/GuardDuty/AWSSDK.GuardDuty.NetStandard.csproj
index 871c4658e779..5da2a611921c 100644
--- a/sdk/src/Services/GuardDuty/AWSSDK.GuardDuty.NetStandard.csproj
+++ b/sdk/src/Services/GuardDuty/AWSSDK.GuardDuty.NetStandard.csproj
@@ -22,6 +22,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <!-- Async Enumerable Compatibility -->
diff --git a/sdk/src/Services/GuardDuty/Generated/AmazonGuardDutyConfig.cs b/sdk/src/Services/GuardDuty/Generated/AmazonGuardDutyConfig.cs
index a4a867f7d5f7..79fec0a200f5 100644
--- a/sdk/src/Services/GuardDuty/Generated/AmazonGuardDutyConfig.cs
+++ b/sdk/src/Services/GuardDuty/Generated/AmazonGuardDutyConfig.cs
@@ -34,7 +34,7 @@ namespace Amazon.GuardDuty
     public partial class AmazonGuardDutyConfig : ClientConfig
     {
         private static readonly string UserAgentString =
-            InternalSDKUtils.BuildUserAgentString("GuardDuty", "3.7.306.7");
+            InternalSDKUtils.BuildUserAgentString("GuardDuty", "4.0.0.0");
 
         private static readonly AmazonGuardDutyEndpointResolver EndpointResolver =
             new AmazonGuardDutyEndpointResolver();
diff --git a/sdk/src/Services/GuardDuty/Properties/AssemblyInfo.cs b/sdk/src/Services/GuardDuty/Properties/AssemblyInfo.cs
index 90029a25238d..9c0974ff816e 100644
--- a/sdk/src/Services/GuardDuty/Properties/AssemblyInfo.cs
+++ b/sdk/src/Services/GuardDuty/Properties/AssemblyInfo.cs
@@ -41,5 +41,9 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.306.7")]
\ No newline at end of file
+#if BCL
+[assembly: AssemblyVersion("4.0")]
+#else
+[assembly: AssemblyVersion("4.0.0.0")]
+#endif
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/src/Services/HealthLake/AWSSDK.HealthLake.NetFramework.csproj b/sdk/src/Services/HealthLake/AWSSDK.HealthLake.NetFramework.csproj
index 335c912e3951..49155fbd04a6 100644
--- a/sdk/src/Services/HealthLake/AWSSDK.HealthLake.NetFramework.csproj
+++ b/sdk/src/Services/HealthLake/AWSSDK.HealthLake.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);BCL;AWS_ASYNC_API;CODE_ANALYSIS</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(RuleSetFileForBuild)' == 'false' Or '$(RuleSetFileForBuild)' == '' ">
diff --git a/sdk/src/Services/HealthLake/AWSSDK.HealthLake.NetStandard.csproj b/sdk/src/Services/HealthLake/AWSSDK.HealthLake.NetStandard.csproj
index 6d983580dd4d..58893a545144 100644
--- a/sdk/src/Services/HealthLake/AWSSDK.HealthLake.NetStandard.csproj
+++ b/sdk/src/Services/HealthLake/AWSSDK.HealthLake.NetStandard.csproj
@@ -22,6 +22,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <!-- Async Enumerable Compatibility -->
diff --git a/sdk/src/Services/HealthLake/Generated/AmazonHealthLakeConfig.cs b/sdk/src/Services/HealthLake/Generated/AmazonHealthLakeConfig.cs
index 177d17d00f4f..e05626fab893 100644
--- a/sdk/src/Services/HealthLake/Generated/AmazonHealthLakeConfig.cs
+++ b/sdk/src/Services/HealthLake/Generated/AmazonHealthLakeConfig.cs
@@ -34,7 +34,7 @@ namespace Amazon.HealthLake
     public partial class AmazonHealthLakeConfig : ClientConfig
     {
         private static readonly string UserAgentString =
-            InternalSDKUtils.BuildUserAgentString("HealthLake", "3.7.302.10");
+            InternalSDKUtils.BuildUserAgentString("HealthLake", "4.0.0.0");
 
         private static readonly AmazonHealthLakeEndpointResolver EndpointResolver =
             new AmazonHealthLakeEndpointResolver();
diff --git a/sdk/src/Services/HealthLake/Properties/AssemblyInfo.cs b/sdk/src/Services/HealthLake/Properties/AssemblyInfo.cs
index 9f24ed2f8fde..3a07a048de77 100644
--- a/sdk/src/Services/HealthLake/Properties/AssemblyInfo.cs
+++ b/sdk/src/Services/HealthLake/Properties/AssemblyInfo.cs
@@ -41,5 +41,9 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.302.10")]
\ No newline at end of file
+#if BCL
+[assembly: AssemblyVersion("4.0")]
+#else
+[assembly: AssemblyVersion("4.0.0.0")]
+#endif
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/src/Services/Honeycode/AWSSDK.Honeycode.NetFramework.csproj b/sdk/src/Services/Honeycode/AWSSDK.Honeycode.NetFramework.csproj
index 00578e94ffe6..36b315be090c 100644
--- a/sdk/src/Services/Honeycode/AWSSDK.Honeycode.NetFramework.csproj
+++ b/sdk/src/Services/Honeycode/AWSSDK.Honeycode.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);BCL;AWS_ASYNC_API;CODE_ANALYSIS</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(RuleSetFileForBuild)' == 'false' Or '$(RuleSetFileForBuild)' == '' ">
diff --git a/sdk/src/Services/Honeycode/AWSSDK.Honeycode.NetStandard.csproj b/sdk/src/Services/Honeycode/AWSSDK.Honeycode.NetStandard.csproj
index 530a450c0cf9..70ce9a476459 100644
--- a/sdk/src/Services/Honeycode/AWSSDK.Honeycode.NetStandard.csproj
+++ b/sdk/src/Services/Honeycode/AWSSDK.Honeycode.NetStandard.csproj
@@ -22,6 +22,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <!-- Async Enumerable Compatibility -->
diff --git a/sdk/src/Services/Honeycode/Generated/AmazonHoneycodeConfig.cs b/sdk/src/Services/Honeycode/Generated/AmazonHoneycodeConfig.cs
index ab3e18b9d35f..ca6d8139ad12 100644
--- a/sdk/src/Services/Honeycode/Generated/AmazonHoneycodeConfig.cs
+++ b/sdk/src/Services/Honeycode/Generated/AmazonHoneycodeConfig.cs
@@ -34,7 +34,7 @@ namespace Amazon.Honeycode
     public partial class AmazonHoneycodeConfig : ClientConfig
     {
         private static readonly string UserAgentString =
-            InternalSDKUtils.BuildUserAgentString("Honeycode", "3.7.300.84");
+            InternalSDKUtils.BuildUserAgentString("Honeycode", "4.0.0.0");
 
         private static readonly AmazonHoneycodeEndpointResolver EndpointResolver =
             new AmazonHoneycodeEndpointResolver();
diff --git a/sdk/src/Services/Honeycode/Properties/AssemblyInfo.cs b/sdk/src/Services/Honeycode/Properties/AssemblyInfo.cs
index 39ca2fc648c3..a1299a35bc60 100644
--- a/sdk/src/Services/Honeycode/Properties/AssemblyInfo.cs
+++ b/sdk/src/Services/Honeycode/Properties/AssemblyInfo.cs
@@ -41,5 +41,9 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.300.84")]
\ No newline at end of file
+#if BCL
+[assembly: AssemblyVersion("4.0")]
+#else
+[assembly: AssemblyVersion("4.0.0.0")]
+#endif
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/src/Services/IAMRolesAnywhere/AWSSDK.IAMRolesAnywhere.NetFramework.csproj b/sdk/src/Services/IAMRolesAnywhere/AWSSDK.IAMRolesAnywhere.NetFramework.csproj
index b46e311cc1e1..25cc94385413 100644
--- a/sdk/src/Services/IAMRolesAnywhere/AWSSDK.IAMRolesAnywhere.NetFramework.csproj
+++ b/sdk/src/Services/IAMRolesAnywhere/AWSSDK.IAMRolesAnywhere.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);BCL;AWS_ASYNC_API;CODE_ANALYSIS</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(RuleSetFileForBuild)' == 'false' Or '$(RuleSetFileForBuild)' == '' ">
diff --git a/sdk/src/Services/IAMRolesAnywhere/AWSSDK.IAMRolesAnywhere.NetStandard.csproj b/sdk/src/Services/IAMRolesAnywhere/AWSSDK.IAMRolesAnywhere.NetStandard.csproj
index 71bc6cc092f5..dcb24a6a9bd1 100644
--- a/sdk/src/Services/IAMRolesAnywhere/AWSSDK.IAMRolesAnywhere.NetStandard.csproj
+++ b/sdk/src/Services/IAMRolesAnywhere/AWSSDK.IAMRolesAnywhere.NetStandard.csproj
@@ -22,6 +22,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <!-- Async Enumerable Compatibility -->
diff --git a/sdk/src/Services/IAMRolesAnywhere/Generated/AmazonIAMRolesAnywhereConfig.cs b/sdk/src/Services/IAMRolesAnywhere/Generated/AmazonIAMRolesAnywhereConfig.cs
index 0f875ded4438..c7e81538c345 100644
--- a/sdk/src/Services/IAMRolesAnywhere/Generated/AmazonIAMRolesAnywhereConfig.cs
+++ b/sdk/src/Services/IAMRolesAnywhere/Generated/AmazonIAMRolesAnywhereConfig.cs
@@ -34,7 +34,7 @@ namespace Amazon.IAMRolesAnywhere
     public partial class AmazonIAMRolesAnywhereConfig : ClientConfig
     {
         private static readonly string UserAgentString =
-            InternalSDKUtils.BuildUserAgentString("RolesAnywhere", "3.7.303.7");
+            InternalSDKUtils.BuildUserAgentString("RolesAnywhere", "4.0.0.0");
 
         private static readonly AmazonIAMRolesAnywhereEndpointResolver EndpointResolver =
             new AmazonIAMRolesAnywhereEndpointResolver();
diff --git a/sdk/src/Services/IAMRolesAnywhere/Properties/AssemblyInfo.cs b/sdk/src/Services/IAMRolesAnywhere/Properties/AssemblyInfo.cs
index 43d64a137701..f7683bbe5f48 100644
--- a/sdk/src/Services/IAMRolesAnywhere/Properties/AssemblyInfo.cs
+++ b/sdk/src/Services/IAMRolesAnywhere/Properties/AssemblyInfo.cs
@@ -41,5 +41,9 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.303.7")]
\ No newline at end of file
+#if BCL
+[assembly: AssemblyVersion("4.0")]
+#else
+[assembly: AssemblyVersion("4.0.0.0")]
+#endif
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/src/Services/IVS/AWSSDK.IVS.NetFramework.csproj b/sdk/src/Services/IVS/AWSSDK.IVS.NetFramework.csproj
index 52bcc4825918..9cb9cf7d886b 100644
--- a/sdk/src/Services/IVS/AWSSDK.IVS.NetFramework.csproj
+++ b/sdk/src/Services/IVS/AWSSDK.IVS.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);BCL;AWS_ASYNC_API;CODE_ANALYSIS</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(RuleSetFileForBuild)' == 'false' Or '$(RuleSetFileForBuild)' == '' ">
diff --git a/sdk/src/Services/IVS/AWSSDK.IVS.NetStandard.csproj b/sdk/src/Services/IVS/AWSSDK.IVS.NetStandard.csproj
index ca65528a9a55..1925227de9d9 100644
--- a/sdk/src/Services/IVS/AWSSDK.IVS.NetStandard.csproj
+++ b/sdk/src/Services/IVS/AWSSDK.IVS.NetStandard.csproj
@@ -22,6 +22,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <!-- Async Enumerable Compatibility -->
diff --git a/sdk/src/Services/IVS/Generated/AmazonIVSConfig.cs b/sdk/src/Services/IVS/Generated/AmazonIVSConfig.cs
index 6c7b7294945e..af3513b75fca 100644
--- a/sdk/src/Services/IVS/Generated/AmazonIVSConfig.cs
+++ b/sdk/src/Services/IVS/Generated/AmazonIVSConfig.cs
@@ -34,7 +34,7 @@ namespace Amazon.IVS
     public partial class AmazonIVSConfig : ClientConfig
     {
         private static readonly string UserAgentString =
-            InternalSDKUtils.BuildUserAgentString("ivs", "3.7.304.2");
+            InternalSDKUtils.BuildUserAgentString("ivs", "4.0.0.0");
 
         private static readonly AmazonIVSEndpointResolver EndpointResolver =
             new AmazonIVSEndpointResolver();
diff --git a/sdk/src/Services/IVS/Properties/AssemblyInfo.cs b/sdk/src/Services/IVS/Properties/AssemblyInfo.cs
index 3961e27e6307..0900ee73dcf0 100644
--- a/sdk/src/Services/IVS/Properties/AssemblyInfo.cs
+++ b/sdk/src/Services/IVS/Properties/AssemblyInfo.cs
@@ -41,5 +41,9 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.304.2")]
\ No newline at end of file
+#if BCL
+[assembly: AssemblyVersion("4.0")]
+#else
+[assembly: AssemblyVersion("4.0.0.0")]
+#endif
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/src/Services/IVSRealTime/AWSSDK.IVSRealTime.NetFramework.csproj b/sdk/src/Services/IVSRealTime/AWSSDK.IVSRealTime.NetFramework.csproj
index 1764342b9ed1..641342f02263 100644
--- a/sdk/src/Services/IVSRealTime/AWSSDK.IVSRealTime.NetFramework.csproj
+++ b/sdk/src/Services/IVSRealTime/AWSSDK.IVSRealTime.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);BCL;AWS_ASYNC_API;CODE_ANALYSIS</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(RuleSetFileForBuild)' == 'false' Or '$(RuleSetFileForBuild)' == '' ">
diff --git a/sdk/src/Services/IVSRealTime/AWSSDK.IVSRealTime.NetStandard.csproj b/sdk/src/Services/IVSRealTime/AWSSDK.IVSRealTime.NetStandard.csproj
index d419f964ac3e..ddb9472acb54 100644
--- a/sdk/src/Services/IVSRealTime/AWSSDK.IVSRealTime.NetStandard.csproj
+++ b/sdk/src/Services/IVSRealTime/AWSSDK.IVSRealTime.NetStandard.csproj
@@ -22,6 +22,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <!-- Async Enumerable Compatibility -->
diff --git a/sdk/src/Services/IVSRealTime/Generated/AmazonIVSRealTimeConfig.cs b/sdk/src/Services/IVSRealTime/Generated/AmazonIVSRealTimeConfig.cs
index 51b89419afc9..d6ea60281db4 100644
--- a/sdk/src/Services/IVSRealTime/Generated/AmazonIVSRealTimeConfig.cs
+++ b/sdk/src/Services/IVSRealTime/Generated/AmazonIVSRealTimeConfig.cs
@@ -34,7 +34,7 @@ namespace Amazon.IVSRealTime
     public partial class AmazonIVSRealTimeConfig : ClientConfig
     {
         private static readonly string UserAgentString =
-            InternalSDKUtils.BuildUserAgentString("IVS RealTime", "3.7.303.2");
+            InternalSDKUtils.BuildUserAgentString("IVS RealTime", "4.0.0.0");
 
         private static readonly AmazonIVSRealTimeEndpointResolver EndpointResolver =
             new AmazonIVSRealTimeEndpointResolver();
diff --git a/sdk/src/Services/IVSRealTime/Properties/AssemblyInfo.cs b/sdk/src/Services/IVSRealTime/Properties/AssemblyInfo.cs
index ddd4ee998bd1..b1c74df76416 100644
--- a/sdk/src/Services/IVSRealTime/Properties/AssemblyInfo.cs
+++ b/sdk/src/Services/IVSRealTime/Properties/AssemblyInfo.cs
@@ -41,5 +41,9 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.303.2")]
\ No newline at end of file
+#if BCL
+[assembly: AssemblyVersion("4.0")]
+#else
+[assembly: AssemblyVersion("4.0.0.0")]
+#endif
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/src/Services/IdentityManagement/AWSSDK.IdentityManagement.NetFramework.csproj b/sdk/src/Services/IdentityManagement/AWSSDK.IdentityManagement.NetFramework.csproj
index a6ed771bf4ff..3f9fcf66e845 100644
--- a/sdk/src/Services/IdentityManagement/AWSSDK.IdentityManagement.NetFramework.csproj
+++ b/sdk/src/Services/IdentityManagement/AWSSDK.IdentityManagement.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);BCL;AWS_ASYNC_API;CODE_ANALYSIS</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(RuleSetFileForBuild)' == 'false' Or '$(RuleSetFileForBuild)' == '' ">
diff --git a/sdk/src/Services/IdentityManagement/AWSSDK.IdentityManagement.NetStandard.csproj b/sdk/src/Services/IdentityManagement/AWSSDK.IdentityManagement.NetStandard.csproj
index 259ae53d23da..07dd21fc4f13 100644
--- a/sdk/src/Services/IdentityManagement/AWSSDK.IdentityManagement.NetStandard.csproj
+++ b/sdk/src/Services/IdentityManagement/AWSSDK.IdentityManagement.NetStandard.csproj
@@ -22,6 +22,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <!-- Async Enumerable Compatibility -->
diff --git a/sdk/src/Services/IdentityManagement/Generated/AmazonIdentityManagementServiceConfig.cs b/sdk/src/Services/IdentityManagement/Generated/AmazonIdentityManagementServiceConfig.cs
index c20c40277420..a3566f1e7ac5 100644
--- a/sdk/src/Services/IdentityManagement/Generated/AmazonIdentityManagementServiceConfig.cs
+++ b/sdk/src/Services/IdentityManagement/Generated/AmazonIdentityManagementServiceConfig.cs
@@ -34,7 +34,7 @@ namespace Amazon.IdentityManagement
     public partial class AmazonIdentityManagementServiceConfig : ClientConfig
     {
         private static readonly string UserAgentString =
-            InternalSDKUtils.BuildUserAgentString("IAM", "3.7.301.10");
+            InternalSDKUtils.BuildUserAgentString("IAM", "4.0.0.0");
 
         private static readonly AmazonIdentityManagementServiceEndpointResolver EndpointResolver =
             new AmazonIdentityManagementServiceEndpointResolver();
diff --git a/sdk/src/Services/IdentityManagement/Properties/AssemblyInfo.cs b/sdk/src/Services/IdentityManagement/Properties/AssemblyInfo.cs
index b095f8e14a4d..3f4fdc47cece 100644
--- a/sdk/src/Services/IdentityManagement/Properties/AssemblyInfo.cs
+++ b/sdk/src/Services/IdentityManagement/Properties/AssemblyInfo.cs
@@ -41,5 +41,9 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.301.10")]
\ No newline at end of file
+#if BCL
+[assembly: AssemblyVersion("4.0")]
+#else
+[assembly: AssemblyVersion("4.0.0.0")]
+#endif
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/src/Services/IdentityStore/AWSSDK.IdentityStore.NetFramework.csproj b/sdk/src/Services/IdentityStore/AWSSDK.IdentityStore.NetFramework.csproj
index fe839d0570cf..f91ee06073eb 100644
--- a/sdk/src/Services/IdentityStore/AWSSDK.IdentityStore.NetFramework.csproj
+++ b/sdk/src/Services/IdentityStore/AWSSDK.IdentityStore.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);BCL;AWS_ASYNC_API;CODE_ANALYSIS</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(RuleSetFileForBuild)' == 'false' Or '$(RuleSetFileForBuild)' == '' ">
diff --git a/sdk/src/Services/IdentityStore/AWSSDK.IdentityStore.NetStandard.csproj b/sdk/src/Services/IdentityStore/AWSSDK.IdentityStore.NetStandard.csproj
index 357a23167663..6b13860d691b 100644
--- a/sdk/src/Services/IdentityStore/AWSSDK.IdentityStore.NetStandard.csproj
+++ b/sdk/src/Services/IdentityStore/AWSSDK.IdentityStore.NetStandard.csproj
@@ -22,6 +22,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <!-- Async Enumerable Compatibility -->
diff --git a/sdk/src/Services/IdentityStore/Generated/AmazonIdentityStoreConfig.cs b/sdk/src/Services/IdentityStore/Generated/AmazonIdentityStoreConfig.cs
index cf58e2419fe6..b7935ee19cec 100644
--- a/sdk/src/Services/IdentityStore/Generated/AmazonIdentityStoreConfig.cs
+++ b/sdk/src/Services/IdentityStore/Generated/AmazonIdentityStoreConfig.cs
@@ -34,7 +34,7 @@ namespace Amazon.IdentityStore
     public partial class AmazonIdentityStoreConfig : ClientConfig
     {
         private static readonly string UserAgentString =
-            InternalSDKUtils.BuildUserAgentString("identitystore", "3.7.300.84");
+            InternalSDKUtils.BuildUserAgentString("identitystore", "4.0.0.0");
 
         private static readonly AmazonIdentityStoreEndpointResolver EndpointResolver =
             new AmazonIdentityStoreEndpointResolver();
diff --git a/sdk/src/Services/IdentityStore/Properties/AssemblyInfo.cs b/sdk/src/Services/IdentityStore/Properties/AssemblyInfo.cs
index e2144edc0cfa..8973fee477ac 100644
--- a/sdk/src/Services/IdentityStore/Properties/AssemblyInfo.cs
+++ b/sdk/src/Services/IdentityStore/Properties/AssemblyInfo.cs
@@ -41,5 +41,9 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.300.84")]
\ No newline at end of file
+#if BCL
+[assembly: AssemblyVersion("4.0")]
+#else
+[assembly: AssemblyVersion("4.0.0.0")]
+#endif
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/src/Services/Imagebuilder/AWSSDK.Imagebuilder.NetFramework.csproj b/sdk/src/Services/Imagebuilder/AWSSDK.Imagebuilder.NetFramework.csproj
index 9e068a1005ec..811579f1037a 100644
--- a/sdk/src/Services/Imagebuilder/AWSSDK.Imagebuilder.NetFramework.csproj
+++ b/sdk/src/Services/Imagebuilder/AWSSDK.Imagebuilder.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);BCL;AWS_ASYNC_API;CODE_ANALYSIS</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(RuleSetFileForBuild)' == 'false' Or '$(RuleSetFileForBuild)' == '' ">
diff --git a/sdk/src/Services/Imagebuilder/AWSSDK.Imagebuilder.NetStandard.csproj b/sdk/src/Services/Imagebuilder/AWSSDK.Imagebuilder.NetStandard.csproj
index 98903e75243e..70c2944a8f6e 100644
--- a/sdk/src/Services/Imagebuilder/AWSSDK.Imagebuilder.NetStandard.csproj
+++ b/sdk/src/Services/Imagebuilder/AWSSDK.Imagebuilder.NetStandard.csproj
@@ -22,6 +22,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <!-- Async Enumerable Compatibility -->
diff --git a/sdk/src/Services/Imagebuilder/Generated/AmazonImagebuilderConfig.cs b/sdk/src/Services/Imagebuilder/Generated/AmazonImagebuilderConfig.cs
index 7bf2b74d77b3..0b70e3d29d3d 100644
--- a/sdk/src/Services/Imagebuilder/Generated/AmazonImagebuilderConfig.cs
+++ b/sdk/src/Services/Imagebuilder/Generated/AmazonImagebuilderConfig.cs
@@ -34,7 +34,7 @@ namespace Amazon.Imagebuilder
     public partial class AmazonImagebuilderConfig : ClientConfig
     {
         private static readonly string UserAgentString =
-            InternalSDKUtils.BuildUserAgentString("imagebuilder", "3.7.303.30");
+            InternalSDKUtils.BuildUserAgentString("imagebuilder", "4.0.0.0");
 
         private static readonly AmazonImagebuilderEndpointResolver EndpointResolver =
             new AmazonImagebuilderEndpointResolver();
diff --git a/sdk/src/Services/Imagebuilder/Properties/AssemblyInfo.cs b/sdk/src/Services/Imagebuilder/Properties/AssemblyInfo.cs
index ee806ece4573..4c392b4a6e77 100644
--- a/sdk/src/Services/Imagebuilder/Properties/AssemblyInfo.cs
+++ b/sdk/src/Services/Imagebuilder/Properties/AssemblyInfo.cs
@@ -41,5 +41,9 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.303.30")]
\ No newline at end of file
+#if BCL
+[assembly: AssemblyVersion("4.0")]
+#else
+[assembly: AssemblyVersion("4.0.0.0")]
+#endif
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/src/Services/ImportExport/AWSSDK.ImportExport.NetFramework.csproj b/sdk/src/Services/ImportExport/AWSSDK.ImportExport.NetFramework.csproj
index 00f1c8787d4e..6e18e7fbd397 100644
--- a/sdk/src/Services/ImportExport/AWSSDK.ImportExport.NetFramework.csproj
+++ b/sdk/src/Services/ImportExport/AWSSDK.ImportExport.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);BCL;AWS_ASYNC_API;CODE_ANALYSIS</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(RuleSetFileForBuild)' == 'false' Or '$(RuleSetFileForBuild)' == '' ">
diff --git a/sdk/src/Services/ImportExport/AWSSDK.ImportExport.NetStandard.csproj b/sdk/src/Services/ImportExport/AWSSDK.ImportExport.NetStandard.csproj
index 5b32570bd24c..5bdf21798b10 100644
--- a/sdk/src/Services/ImportExport/AWSSDK.ImportExport.NetStandard.csproj
+++ b/sdk/src/Services/ImportExport/AWSSDK.ImportExport.NetStandard.csproj
@@ -22,6 +22,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <!-- Async Enumerable Compatibility -->
diff --git a/sdk/src/Services/ImportExport/Generated/AmazonImportExportConfig.cs b/sdk/src/Services/ImportExport/Generated/AmazonImportExportConfig.cs
index fa160e0edc1a..a91ee5d5910f 100644
--- a/sdk/src/Services/ImportExport/Generated/AmazonImportExportConfig.cs
+++ b/sdk/src/Services/ImportExport/Generated/AmazonImportExportConfig.cs
@@ -34,7 +34,7 @@ namespace Amazon.ImportExport
     public partial class AmazonImportExportConfig : ClientConfig
     {
         private static readonly string UserAgentString =
-            InternalSDKUtils.BuildUserAgentString("ImportExport", "3.7.300.84");
+            InternalSDKUtils.BuildUserAgentString("ImportExport", "4.0.0.0");
 
         private static readonly AmazonImportExportEndpointResolver EndpointResolver =
             new AmazonImportExportEndpointResolver();
diff --git a/sdk/src/Services/ImportExport/Properties/AssemblyInfo.cs b/sdk/src/Services/ImportExport/Properties/AssemblyInfo.cs
index 5c8fa383d39e..3562b25a3c1b 100644
--- a/sdk/src/Services/ImportExport/Properties/AssemblyInfo.cs
+++ b/sdk/src/Services/ImportExport/Properties/AssemblyInfo.cs
@@ -41,5 +41,9 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.300.84")]
\ No newline at end of file
+#if BCL
+[assembly: AssemblyVersion("4.0")]
+#else
+[assembly: AssemblyVersion("4.0.0.0")]
+#endif
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/src/Services/Inspector/AWSSDK.Inspector.NetFramework.csproj b/sdk/src/Services/Inspector/AWSSDK.Inspector.NetFramework.csproj
index fbd5f2110e10..3324005fbb0f 100644
--- a/sdk/src/Services/Inspector/AWSSDK.Inspector.NetFramework.csproj
+++ b/sdk/src/Services/Inspector/AWSSDK.Inspector.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);BCL;AWS_ASYNC_API;CODE_ANALYSIS</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(RuleSetFileForBuild)' == 'false' Or '$(RuleSetFileForBuild)' == '' ">
diff --git a/sdk/src/Services/Inspector/AWSSDK.Inspector.NetStandard.csproj b/sdk/src/Services/Inspector/AWSSDK.Inspector.NetStandard.csproj
index c8ab6f04eec2..ccdcd734b9f4 100644
--- a/sdk/src/Services/Inspector/AWSSDK.Inspector.NetStandard.csproj
+++ b/sdk/src/Services/Inspector/AWSSDK.Inspector.NetStandard.csproj
@@ -22,6 +22,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <!-- Async Enumerable Compatibility -->
diff --git a/sdk/src/Services/Inspector/Generated/AmazonInspectorConfig.cs b/sdk/src/Services/Inspector/Generated/AmazonInspectorConfig.cs
index a840059b0243..0da4808765ef 100644
--- a/sdk/src/Services/Inspector/Generated/AmazonInspectorConfig.cs
+++ b/sdk/src/Services/Inspector/Generated/AmazonInspectorConfig.cs
@@ -34,7 +34,7 @@ namespace Amazon.Inspector
     public partial class AmazonInspectorConfig : ClientConfig
     {
         private static readonly string UserAgentString =
-            InternalSDKUtils.BuildUserAgentString("Inspector", "3.7.300.84");
+            InternalSDKUtils.BuildUserAgentString("Inspector", "4.0.0.0");
 
         private static readonly AmazonInspectorEndpointResolver EndpointResolver =
             new AmazonInspectorEndpointResolver();
diff --git a/sdk/src/Services/Inspector/Properties/AssemblyInfo.cs b/sdk/src/Services/Inspector/Properties/AssemblyInfo.cs
index 662dd929d773..121011ee3bc6 100644
--- a/sdk/src/Services/Inspector/Properties/AssemblyInfo.cs
+++ b/sdk/src/Services/Inspector/Properties/AssemblyInfo.cs
@@ -41,5 +41,9 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.300.84")]
\ No newline at end of file
+#if BCL
+[assembly: AssemblyVersion("4.0")]
+#else
+[assembly: AssemblyVersion("4.0.0.0")]
+#endif
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/src/Services/Inspector2/AWSSDK.Inspector2.NetFramework.csproj b/sdk/src/Services/Inspector2/AWSSDK.Inspector2.NetFramework.csproj
index e76f565322bf..c131d726a14d 100644
--- a/sdk/src/Services/Inspector2/AWSSDK.Inspector2.NetFramework.csproj
+++ b/sdk/src/Services/Inspector2/AWSSDK.Inspector2.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);BCL;AWS_ASYNC_API;CODE_ANALYSIS</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(RuleSetFileForBuild)' == 'false' Or '$(RuleSetFileForBuild)' == '' ">
diff --git a/sdk/src/Services/Inspector2/AWSSDK.Inspector2.NetStandard.csproj b/sdk/src/Services/Inspector2/AWSSDK.Inspector2.NetStandard.csproj
index 1bb91980c6bb..864450497cc9 100644
--- a/sdk/src/Services/Inspector2/AWSSDK.Inspector2.NetStandard.csproj
+++ b/sdk/src/Services/Inspector2/AWSSDK.Inspector2.NetStandard.csproj
@@ -22,6 +22,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <!-- Async Enumerable Compatibility -->
diff --git a/sdk/src/Services/Inspector2/Generated/AmazonInspector2Config.cs b/sdk/src/Services/Inspector2/Generated/AmazonInspector2Config.cs
index 989b9fd8dbb1..e548f6f090b8 100644
--- a/sdk/src/Services/Inspector2/Generated/AmazonInspector2Config.cs
+++ b/sdk/src/Services/Inspector2/Generated/AmazonInspector2Config.cs
@@ -34,7 +34,7 @@ namespace Amazon.Inspector2
     public partial class AmazonInspector2Config : ClientConfig
     {
         private static readonly string UserAgentString =
-            InternalSDKUtils.BuildUserAgentString("Inspector2", "3.7.303.0");
+            InternalSDKUtils.BuildUserAgentString("Inspector2", "4.0.0.0");
 
         private static readonly AmazonInspector2EndpointResolver EndpointResolver =
             new AmazonInspector2EndpointResolver();
diff --git a/sdk/src/Services/Inspector2/Properties/AssemblyInfo.cs b/sdk/src/Services/Inspector2/Properties/AssemblyInfo.cs
index 6cb247f10942..b63f608b2e3e 100644
--- a/sdk/src/Services/Inspector2/Properties/AssemblyInfo.cs
+++ b/sdk/src/Services/Inspector2/Properties/AssemblyInfo.cs
@@ -41,5 +41,9 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.303.0")]
\ No newline at end of file
+#if BCL
+[assembly: AssemblyVersion("4.0")]
+#else
+[assembly: AssemblyVersion("4.0.0.0")]
+#endif
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/src/Services/InspectorScan/AWSSDK.InspectorScan.NetFramework.csproj b/sdk/src/Services/InspectorScan/AWSSDK.InspectorScan.NetFramework.csproj
index 6874064ddc5b..55ea5646f209 100644
--- a/sdk/src/Services/InspectorScan/AWSSDK.InspectorScan.NetFramework.csproj
+++ b/sdk/src/Services/InspectorScan/AWSSDK.InspectorScan.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);BCL;AWS_ASYNC_API;CODE_ANALYSIS</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(RuleSetFileForBuild)' == 'false' Or '$(RuleSetFileForBuild)' == '' ">
diff --git a/sdk/src/Services/InspectorScan/AWSSDK.InspectorScan.NetStandard.csproj b/sdk/src/Services/InspectorScan/AWSSDK.InspectorScan.NetStandard.csproj
index 06ecb4561707..f76f5ba21b57 100644
--- a/sdk/src/Services/InspectorScan/AWSSDK.InspectorScan.NetStandard.csproj
+++ b/sdk/src/Services/InspectorScan/AWSSDK.InspectorScan.NetStandard.csproj
@@ -22,6 +22,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <!-- Async Enumerable Compatibility -->
diff --git a/sdk/src/Services/InspectorScan/Generated/AmazonInspectorScanConfig.cs b/sdk/src/Services/InspectorScan/Generated/AmazonInspectorScanConfig.cs
index adaabc93fb19..27f140ef4a19 100644
--- a/sdk/src/Services/InspectorScan/Generated/AmazonInspectorScanConfig.cs
+++ b/sdk/src/Services/InspectorScan/Generated/AmazonInspectorScanConfig.cs
@@ -34,7 +34,7 @@ namespace Amazon.InspectorScan
     public partial class AmazonInspectorScanConfig : ClientConfig
     {
         private static readonly string UserAgentString =
-            InternalSDKUtils.BuildUserAgentString("Inspector Scan", "3.7.300.77");
+            InternalSDKUtils.BuildUserAgentString("Inspector Scan", "4.0.0.0");
 
         private static readonly AmazonInspectorScanEndpointResolver EndpointResolver =
             new AmazonInspectorScanEndpointResolver();
diff --git a/sdk/src/Services/InspectorScan/Properties/AssemblyInfo.cs b/sdk/src/Services/InspectorScan/Properties/AssemblyInfo.cs
index 92cacbc1fafc..239a8719c76c 100644
--- a/sdk/src/Services/InspectorScan/Properties/AssemblyInfo.cs
+++ b/sdk/src/Services/InspectorScan/Properties/AssemblyInfo.cs
@@ -41,5 +41,9 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.300.77")]
\ No newline at end of file
+#if BCL
+[assembly: AssemblyVersion("4.0")]
+#else
+[assembly: AssemblyVersion("4.0.0.0")]
+#endif
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/src/Services/InternetMonitor/AWSSDK.InternetMonitor.NetFramework.csproj b/sdk/src/Services/InternetMonitor/AWSSDK.InternetMonitor.NetFramework.csproj
index b12bc7524406..5292da5bf132 100644
--- a/sdk/src/Services/InternetMonitor/AWSSDK.InternetMonitor.NetFramework.csproj
+++ b/sdk/src/Services/InternetMonitor/AWSSDK.InternetMonitor.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);BCL;AWS_ASYNC_API;CODE_ANALYSIS</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(RuleSetFileForBuild)' == 'false' Or '$(RuleSetFileForBuild)' == '' ">
diff --git a/sdk/src/Services/InternetMonitor/AWSSDK.InternetMonitor.NetStandard.csproj b/sdk/src/Services/InternetMonitor/AWSSDK.InternetMonitor.NetStandard.csproj
index c285fdbebb43..9449005d2476 100644
--- a/sdk/src/Services/InternetMonitor/AWSSDK.InternetMonitor.NetStandard.csproj
+++ b/sdk/src/Services/InternetMonitor/AWSSDK.InternetMonitor.NetStandard.csproj
@@ -22,6 +22,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <!-- Async Enumerable Compatibility -->
diff --git a/sdk/src/Services/InternetMonitor/Generated/AmazonInternetMonitorConfig.cs b/sdk/src/Services/InternetMonitor/Generated/AmazonInternetMonitorConfig.cs
index 80cf1bc72fce..8593e128b841 100644
--- a/sdk/src/Services/InternetMonitor/Generated/AmazonInternetMonitorConfig.cs
+++ b/sdk/src/Services/InternetMonitor/Generated/AmazonInternetMonitorConfig.cs
@@ -34,7 +34,7 @@ namespace Amazon.InternetMonitor
     public partial class AmazonInternetMonitorConfig : ClientConfig
     {
         private static readonly string UserAgentString =
-            InternalSDKUtils.BuildUserAgentString("InternetMonitor", "3.7.304.6");
+            InternalSDKUtils.BuildUserAgentString("InternetMonitor", "4.0.0.0");
 
         private static readonly AmazonInternetMonitorEndpointResolver EndpointResolver =
             new AmazonInternetMonitorEndpointResolver();
diff --git a/sdk/src/Services/InternetMonitor/Properties/AssemblyInfo.cs b/sdk/src/Services/InternetMonitor/Properties/AssemblyInfo.cs
index 810052a9a3b6..c2c9532f7367 100644
--- a/sdk/src/Services/InternetMonitor/Properties/AssemblyInfo.cs
+++ b/sdk/src/Services/InternetMonitor/Properties/AssemblyInfo.cs
@@ -41,5 +41,9 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.304.6")]
\ No newline at end of file
+#if BCL
+[assembly: AssemblyVersion("4.0")]
+#else
+[assembly: AssemblyVersion("4.0.0.0")]
+#endif
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/src/Services/IoT/AWSSDK.IoT.NetFramework.csproj b/sdk/src/Services/IoT/AWSSDK.IoT.NetFramework.csproj
index b2a7c905e127..c3bb587901f0 100644
--- a/sdk/src/Services/IoT/AWSSDK.IoT.NetFramework.csproj
+++ b/sdk/src/Services/IoT/AWSSDK.IoT.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);BCL;AWS_ASYNC_API;CODE_ANALYSIS</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(RuleSetFileForBuild)' == 'false' Or '$(RuleSetFileForBuild)' == '' ">
diff --git a/sdk/src/Services/IoT/AWSSDK.IoT.NetStandard.csproj b/sdk/src/Services/IoT/AWSSDK.IoT.NetStandard.csproj
index 50b729fdbbf6..04a86cca2c7a 100644
--- a/sdk/src/Services/IoT/AWSSDK.IoT.NetStandard.csproj
+++ b/sdk/src/Services/IoT/AWSSDK.IoT.NetStandard.csproj
@@ -22,6 +22,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <!-- Async Enumerable Compatibility -->
diff --git a/sdk/src/Services/IoT/Generated/AmazonIoTConfig.cs b/sdk/src/Services/IoT/Generated/AmazonIoTConfig.cs
index 34df58ca7d33..d43443b77cf2 100644
--- a/sdk/src/Services/IoT/Generated/AmazonIoTConfig.cs
+++ b/sdk/src/Services/IoT/Generated/AmazonIoTConfig.cs
@@ -34,7 +34,7 @@ namespace Amazon.IoT
     public partial class AmazonIoTConfig : ClientConfig
     {
         private static readonly string UserAgentString =
-            InternalSDKUtils.BuildUserAgentString("IoT", "3.7.307.31");
+            InternalSDKUtils.BuildUserAgentString("IoT", "4.0.0.0");
 
         private static readonly AmazonIoTEndpointResolver EndpointResolver =
             new AmazonIoTEndpointResolver();
diff --git a/sdk/src/Services/IoT/Properties/AssemblyInfo.cs b/sdk/src/Services/IoT/Properties/AssemblyInfo.cs
index 5a8ca202a0b0..fcc558486667 100644
--- a/sdk/src/Services/IoT/Properties/AssemblyInfo.cs
+++ b/sdk/src/Services/IoT/Properties/AssemblyInfo.cs
@@ -41,5 +41,9 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.307.31")]
\ No newline at end of file
+#if BCL
+[assembly: AssemblyVersion("4.0")]
+#else
+[assembly: AssemblyVersion("4.0.0.0")]
+#endif
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/src/Services/IoT1ClickDevicesService/AWSSDK.IoT1ClickDevicesService.NetFramework.csproj b/sdk/src/Services/IoT1ClickDevicesService/AWSSDK.IoT1ClickDevicesService.NetFramework.csproj
index 9a696ff4120a..4f150b20a460 100644
--- a/sdk/src/Services/IoT1ClickDevicesService/AWSSDK.IoT1ClickDevicesService.NetFramework.csproj
+++ b/sdk/src/Services/IoT1ClickDevicesService/AWSSDK.IoT1ClickDevicesService.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);BCL;AWS_ASYNC_API;CODE_ANALYSIS</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(RuleSetFileForBuild)' == 'false' Or '$(RuleSetFileForBuild)' == '' ">
diff --git a/sdk/src/Services/IoT1ClickDevicesService/AWSSDK.IoT1ClickDevicesService.NetStandard.csproj b/sdk/src/Services/IoT1ClickDevicesService/AWSSDK.IoT1ClickDevicesService.NetStandard.csproj
index 4ce9b64e7f36..dbd2c022c0c9 100644
--- a/sdk/src/Services/IoT1ClickDevicesService/AWSSDK.IoT1ClickDevicesService.NetStandard.csproj
+++ b/sdk/src/Services/IoT1ClickDevicesService/AWSSDK.IoT1ClickDevicesService.NetStandard.csproj
@@ -22,6 +22,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <!-- Async Enumerable Compatibility -->
diff --git a/sdk/src/Services/IoT1ClickDevicesService/Generated/AmazonIoT1ClickDevicesServiceConfig.cs b/sdk/src/Services/IoT1ClickDevicesService/Generated/AmazonIoT1ClickDevicesServiceConfig.cs
index 4beb488a2c02..0839aacbeaf3 100644
--- a/sdk/src/Services/IoT1ClickDevicesService/Generated/AmazonIoT1ClickDevicesServiceConfig.cs
+++ b/sdk/src/Services/IoT1ClickDevicesService/Generated/AmazonIoT1ClickDevicesServiceConfig.cs
@@ -34,7 +34,7 @@ namespace Amazon.IoT1ClickDevicesService
     public partial class AmazonIoT1ClickDevicesServiceConfig : ClientConfig
     {
         private static readonly string UserAgentString =
-            InternalSDKUtils.BuildUserAgentString("IoT 1Click Devices Service", "3.7.300.84");
+            InternalSDKUtils.BuildUserAgentString("IoT 1Click Devices Service", "4.0.0.0");
 
         private static readonly AmazonIoT1ClickDevicesServiceEndpointResolver EndpointResolver =
             new AmazonIoT1ClickDevicesServiceEndpointResolver();
diff --git a/sdk/src/Services/IoT1ClickDevicesService/Properties/AssemblyInfo.cs b/sdk/src/Services/IoT1ClickDevicesService/Properties/AssemblyInfo.cs
index c07ab524772e..c5cfe2b02754 100644
--- a/sdk/src/Services/IoT1ClickDevicesService/Properties/AssemblyInfo.cs
+++ b/sdk/src/Services/IoT1ClickDevicesService/Properties/AssemblyInfo.cs
@@ -41,5 +41,9 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.300.84")]
\ No newline at end of file
+#if BCL
+[assembly: AssemblyVersion("4.0")]
+#else
+[assembly: AssemblyVersion("4.0.0.0")]
+#endif
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/src/Services/IoT1ClickProjects/AWSSDK.IoT1ClickProjects.NetFramework.csproj b/sdk/src/Services/IoT1ClickProjects/AWSSDK.IoT1ClickProjects.NetFramework.csproj
index f5f193828eec..ab83dab0a30a 100644
--- a/sdk/src/Services/IoT1ClickProjects/AWSSDK.IoT1ClickProjects.NetFramework.csproj
+++ b/sdk/src/Services/IoT1ClickProjects/AWSSDK.IoT1ClickProjects.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);BCL;AWS_ASYNC_API;CODE_ANALYSIS</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(RuleSetFileForBuild)' == 'false' Or '$(RuleSetFileForBuild)' == '' ">
diff --git a/sdk/src/Services/IoT1ClickProjects/AWSSDK.IoT1ClickProjects.NetStandard.csproj b/sdk/src/Services/IoT1ClickProjects/AWSSDK.IoT1ClickProjects.NetStandard.csproj
index 60eefe2bc761..42adfc7f4c9b 100644
--- a/sdk/src/Services/IoT1ClickProjects/AWSSDK.IoT1ClickProjects.NetStandard.csproj
+++ b/sdk/src/Services/IoT1ClickProjects/AWSSDK.IoT1ClickProjects.NetStandard.csproj
@@ -22,6 +22,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <!-- Async Enumerable Compatibility -->
diff --git a/sdk/src/Services/IoT1ClickProjects/Generated/AmazonIoT1ClickProjectsConfig.cs b/sdk/src/Services/IoT1ClickProjects/Generated/AmazonIoT1ClickProjectsConfig.cs
index de46dc30c85f..65201cb00257 100644
--- a/sdk/src/Services/IoT1ClickProjects/Generated/AmazonIoT1ClickProjectsConfig.cs
+++ b/sdk/src/Services/IoT1ClickProjects/Generated/AmazonIoT1ClickProjectsConfig.cs
@@ -34,7 +34,7 @@ namespace Amazon.IoT1ClickProjects
     public partial class AmazonIoT1ClickProjectsConfig : ClientConfig
     {
         private static readonly string UserAgentString =
-            InternalSDKUtils.BuildUserAgentString("IoT 1Click Projects", "3.7.300.84");
+            InternalSDKUtils.BuildUserAgentString("IoT 1Click Projects", "4.0.0.0");
 
         private static readonly AmazonIoT1ClickProjectsEndpointResolver EndpointResolver =
             new AmazonIoT1ClickProjectsEndpointResolver();
diff --git a/sdk/src/Services/IoT1ClickProjects/Properties/AssemblyInfo.cs b/sdk/src/Services/IoT1ClickProjects/Properties/AssemblyInfo.cs
index 91e5db2fb604..65cff09e4e7b 100644
--- a/sdk/src/Services/IoT1ClickProjects/Properties/AssemblyInfo.cs
+++ b/sdk/src/Services/IoT1ClickProjects/Properties/AssemblyInfo.cs
@@ -41,5 +41,9 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.300.84")]
\ No newline at end of file
+#if BCL
+[assembly: AssemblyVersion("4.0")]
+#else
+[assembly: AssemblyVersion("4.0.0.0")]
+#endif
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/src/Services/IoTAnalytics/AWSSDK.IoTAnalytics.NetFramework.csproj b/sdk/src/Services/IoTAnalytics/AWSSDK.IoTAnalytics.NetFramework.csproj
index 760767c95037..736eb0d43ad3 100644
--- a/sdk/src/Services/IoTAnalytics/AWSSDK.IoTAnalytics.NetFramework.csproj
+++ b/sdk/src/Services/IoTAnalytics/AWSSDK.IoTAnalytics.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);BCL;AWS_ASYNC_API;CODE_ANALYSIS</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(RuleSetFileForBuild)' == 'false' Or '$(RuleSetFileForBuild)' == '' ">
diff --git a/sdk/src/Services/IoTAnalytics/AWSSDK.IoTAnalytics.NetStandard.csproj b/sdk/src/Services/IoTAnalytics/AWSSDK.IoTAnalytics.NetStandard.csproj
index c5750de4dea4..d6541b5ba19b 100644
--- a/sdk/src/Services/IoTAnalytics/AWSSDK.IoTAnalytics.NetStandard.csproj
+++ b/sdk/src/Services/IoTAnalytics/AWSSDK.IoTAnalytics.NetStandard.csproj
@@ -22,6 +22,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <!-- Async Enumerable Compatibility -->
diff --git a/sdk/src/Services/IoTAnalytics/Generated/AmazonIoTAnalyticsConfig.cs b/sdk/src/Services/IoTAnalytics/Generated/AmazonIoTAnalyticsConfig.cs
index d76d1d744c0d..e1f8a2da970a 100644
--- a/sdk/src/Services/IoTAnalytics/Generated/AmazonIoTAnalyticsConfig.cs
+++ b/sdk/src/Services/IoTAnalytics/Generated/AmazonIoTAnalyticsConfig.cs
@@ -34,7 +34,7 @@ namespace Amazon.IoTAnalytics
     public partial class AmazonIoTAnalyticsConfig : ClientConfig
     {
         private static readonly string UserAgentString =
-            InternalSDKUtils.BuildUserAgentString("IoTAnalytics", "3.7.300.84");
+            InternalSDKUtils.BuildUserAgentString("IoTAnalytics", "4.0.0.0");
 
         private static readonly AmazonIoTAnalyticsEndpointResolver EndpointResolver =
             new AmazonIoTAnalyticsEndpointResolver();
diff --git a/sdk/src/Services/IoTAnalytics/Properties/AssemblyInfo.cs b/sdk/src/Services/IoTAnalytics/Properties/AssemblyInfo.cs
index 3636032d7d6c..c7078eb8138c 100644
--- a/sdk/src/Services/IoTAnalytics/Properties/AssemblyInfo.cs
+++ b/sdk/src/Services/IoTAnalytics/Properties/AssemblyInfo.cs
@@ -41,5 +41,9 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.300.84")]
\ No newline at end of file
+#if BCL
+[assembly: AssemblyVersion("4.0")]
+#else
+[assembly: AssemblyVersion("4.0.0.0")]
+#endif
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/src/Services/IoTDeviceAdvisor/AWSSDK.IoTDeviceAdvisor.NetFramework.csproj b/sdk/src/Services/IoTDeviceAdvisor/AWSSDK.IoTDeviceAdvisor.NetFramework.csproj
index 78e70abce08b..c05956d37790 100644
--- a/sdk/src/Services/IoTDeviceAdvisor/AWSSDK.IoTDeviceAdvisor.NetFramework.csproj
+++ b/sdk/src/Services/IoTDeviceAdvisor/AWSSDK.IoTDeviceAdvisor.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);BCL;AWS_ASYNC_API;CODE_ANALYSIS</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(RuleSetFileForBuild)' == 'false' Or '$(RuleSetFileForBuild)' == '' ">
diff --git a/sdk/src/Services/IoTDeviceAdvisor/AWSSDK.IoTDeviceAdvisor.NetStandard.csproj b/sdk/src/Services/IoTDeviceAdvisor/AWSSDK.IoTDeviceAdvisor.NetStandard.csproj
index 863e2adeb378..eedf18bfcd8d 100644
--- a/sdk/src/Services/IoTDeviceAdvisor/AWSSDK.IoTDeviceAdvisor.NetStandard.csproj
+++ b/sdk/src/Services/IoTDeviceAdvisor/AWSSDK.IoTDeviceAdvisor.NetStandard.csproj
@@ -22,6 +22,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <!-- Async Enumerable Compatibility -->
diff --git a/sdk/src/Services/IoTDeviceAdvisor/Generated/AmazonIoTDeviceAdvisorConfig.cs b/sdk/src/Services/IoTDeviceAdvisor/Generated/AmazonIoTDeviceAdvisorConfig.cs
index 2118adef1a0d..5b7069837859 100644
--- a/sdk/src/Services/IoTDeviceAdvisor/Generated/AmazonIoTDeviceAdvisorConfig.cs
+++ b/sdk/src/Services/IoTDeviceAdvisor/Generated/AmazonIoTDeviceAdvisorConfig.cs
@@ -34,7 +34,7 @@ namespace Amazon.IoTDeviceAdvisor
     public partial class AmazonIoTDeviceAdvisorConfig : ClientConfig
     {
         private static readonly string UserAgentString =
-            InternalSDKUtils.BuildUserAgentString("IotDeviceAdvisor", "3.7.300.84");
+            InternalSDKUtils.BuildUserAgentString("IotDeviceAdvisor", "4.0.0.0");
 
         private static readonly AmazonIoTDeviceAdvisorEndpointResolver EndpointResolver =
             new AmazonIoTDeviceAdvisorEndpointResolver();
diff --git a/sdk/src/Services/IoTDeviceAdvisor/Properties/AssemblyInfo.cs b/sdk/src/Services/IoTDeviceAdvisor/Properties/AssemblyInfo.cs
index 71a7f94dbfe0..3468c70275e5 100644
--- a/sdk/src/Services/IoTDeviceAdvisor/Properties/AssemblyInfo.cs
+++ b/sdk/src/Services/IoTDeviceAdvisor/Properties/AssemblyInfo.cs
@@ -41,5 +41,9 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.300.84")]
\ No newline at end of file
+#if BCL
+[assembly: AssemblyVersion("4.0")]
+#else
+[assembly: AssemblyVersion("4.0.0.0")]
+#endif
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/src/Services/IoTEvents/AWSSDK.IoTEvents.NetFramework.csproj b/sdk/src/Services/IoTEvents/AWSSDK.IoTEvents.NetFramework.csproj
index 86dc705ebf42..99cb0e2c9156 100644
--- a/sdk/src/Services/IoTEvents/AWSSDK.IoTEvents.NetFramework.csproj
+++ b/sdk/src/Services/IoTEvents/AWSSDK.IoTEvents.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);BCL;AWS_ASYNC_API;CODE_ANALYSIS</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(RuleSetFileForBuild)' == 'false' Or '$(RuleSetFileForBuild)' == '' ">
diff --git a/sdk/src/Services/IoTEvents/AWSSDK.IoTEvents.NetStandard.csproj b/sdk/src/Services/IoTEvents/AWSSDK.IoTEvents.NetStandard.csproj
index 9bfe31ce5607..8a9e24a9cad1 100644
--- a/sdk/src/Services/IoTEvents/AWSSDK.IoTEvents.NetStandard.csproj
+++ b/sdk/src/Services/IoTEvents/AWSSDK.IoTEvents.NetStandard.csproj
@@ -22,6 +22,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <!-- Async Enumerable Compatibility -->
diff --git a/sdk/src/Services/IoTEvents/Generated/AmazonIoTEventsConfig.cs b/sdk/src/Services/IoTEvents/Generated/AmazonIoTEventsConfig.cs
index 8d72b73250fa..454ba6774c5c 100644
--- a/sdk/src/Services/IoTEvents/Generated/AmazonIoTEventsConfig.cs
+++ b/sdk/src/Services/IoTEvents/Generated/AmazonIoTEventsConfig.cs
@@ -34,7 +34,7 @@ namespace Amazon.IoTEvents
     public partial class AmazonIoTEventsConfig : ClientConfig
     {
         private static readonly string UserAgentString =
-            InternalSDKUtils.BuildUserAgentString("IoT Events", "3.7.301.32");
+            InternalSDKUtils.BuildUserAgentString("IoT Events", "4.0.0.0");
 
         private static readonly AmazonIoTEventsEndpointResolver EndpointResolver =
             new AmazonIoTEventsEndpointResolver();
diff --git a/sdk/src/Services/IoTEvents/Properties/AssemblyInfo.cs b/sdk/src/Services/IoTEvents/Properties/AssemblyInfo.cs
index 5d3ef3cc93cf..76b3c6c030ee 100644
--- a/sdk/src/Services/IoTEvents/Properties/AssemblyInfo.cs
+++ b/sdk/src/Services/IoTEvents/Properties/AssemblyInfo.cs
@@ -41,5 +41,9 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.301.32")]
\ No newline at end of file
+#if BCL
+[assembly: AssemblyVersion("4.0")]
+#else
+[assembly: AssemblyVersion("4.0.0.0")]
+#endif
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/src/Services/IoTEventsData/AWSSDK.IoTEventsData.NetFramework.csproj b/sdk/src/Services/IoTEventsData/AWSSDK.IoTEventsData.NetFramework.csproj
index c45efc5ad56f..302216e202d6 100644
--- a/sdk/src/Services/IoTEventsData/AWSSDK.IoTEventsData.NetFramework.csproj
+++ b/sdk/src/Services/IoTEventsData/AWSSDK.IoTEventsData.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);BCL;AWS_ASYNC_API;CODE_ANALYSIS</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(RuleSetFileForBuild)' == 'false' Or '$(RuleSetFileForBuild)' == '' ">
diff --git a/sdk/src/Services/IoTEventsData/AWSSDK.IoTEventsData.NetStandard.csproj b/sdk/src/Services/IoTEventsData/AWSSDK.IoTEventsData.NetStandard.csproj
index 6575019528bf..b748ac6836b1 100644
--- a/sdk/src/Services/IoTEventsData/AWSSDK.IoTEventsData.NetStandard.csproj
+++ b/sdk/src/Services/IoTEventsData/AWSSDK.IoTEventsData.NetStandard.csproj
@@ -22,6 +22,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <!-- Async Enumerable Compatibility -->
diff --git a/sdk/src/Services/IoTEventsData/Generated/AmazonIoTEventsDataConfig.cs b/sdk/src/Services/IoTEventsData/Generated/AmazonIoTEventsDataConfig.cs
index b089b9ec616e..9ed5e4859a39 100644
--- a/sdk/src/Services/IoTEventsData/Generated/AmazonIoTEventsDataConfig.cs
+++ b/sdk/src/Services/IoTEventsData/Generated/AmazonIoTEventsDataConfig.cs
@@ -34,7 +34,7 @@ namespace Amazon.IoTEventsData
     public partial class AmazonIoTEventsDataConfig : ClientConfig
     {
         private static readonly string UserAgentString =
-            InternalSDKUtils.BuildUserAgentString("IoT Events Data", "3.7.300.84");
+            InternalSDKUtils.BuildUserAgentString("IoT Events Data", "4.0.0.0");
 
         private static readonly AmazonIoTEventsDataEndpointResolver EndpointResolver =
             new AmazonIoTEventsDataEndpointResolver();
diff --git a/sdk/src/Services/IoTEventsData/Properties/AssemblyInfo.cs b/sdk/src/Services/IoTEventsData/Properties/AssemblyInfo.cs
index d54337115684..0a0d06e07dd8 100644
--- a/sdk/src/Services/IoTEventsData/Properties/AssemblyInfo.cs
+++ b/sdk/src/Services/IoTEventsData/Properties/AssemblyInfo.cs
@@ -41,5 +41,9 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.300.84")]
\ No newline at end of file
+#if BCL
+[assembly: AssemblyVersion("4.0")]
+#else
+[assembly: AssemblyVersion("4.0.0.0")]
+#endif
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/src/Services/IoTFleetHub/AWSSDK.IoTFleetHub.NetFramework.csproj b/sdk/src/Services/IoTFleetHub/AWSSDK.IoTFleetHub.NetFramework.csproj
index 43f8717e8503..245622372004 100644
--- a/sdk/src/Services/IoTFleetHub/AWSSDK.IoTFleetHub.NetFramework.csproj
+++ b/sdk/src/Services/IoTFleetHub/AWSSDK.IoTFleetHub.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);BCL;AWS_ASYNC_API;CODE_ANALYSIS</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(RuleSetFileForBuild)' == 'false' Or '$(RuleSetFileForBuild)' == '' ">
diff --git a/sdk/src/Services/IoTFleetHub/AWSSDK.IoTFleetHub.NetStandard.csproj b/sdk/src/Services/IoTFleetHub/AWSSDK.IoTFleetHub.NetStandard.csproj
index 557ae2e82c10..1f8621ce070f 100644
--- a/sdk/src/Services/IoTFleetHub/AWSSDK.IoTFleetHub.NetStandard.csproj
+++ b/sdk/src/Services/IoTFleetHub/AWSSDK.IoTFleetHub.NetStandard.csproj
@@ -22,6 +22,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <!-- Async Enumerable Compatibility -->
diff --git a/sdk/src/Services/IoTFleetHub/Generated/AmazonIoTFleetHubConfig.cs b/sdk/src/Services/IoTFleetHub/Generated/AmazonIoTFleetHubConfig.cs
index 5570d186e0c6..4e3bad0471e9 100644
--- a/sdk/src/Services/IoTFleetHub/Generated/AmazonIoTFleetHubConfig.cs
+++ b/sdk/src/Services/IoTFleetHub/Generated/AmazonIoTFleetHubConfig.cs
@@ -34,7 +34,7 @@ namespace Amazon.IoTFleetHub
     public partial class AmazonIoTFleetHubConfig : ClientConfig
     {
         private static readonly string UserAgentString =
-            InternalSDKUtils.BuildUserAgentString("IoTFleetHub", "3.7.300.85");
+            InternalSDKUtils.BuildUserAgentString("IoTFleetHub", "4.0.0.0");
 
         private static readonly AmazonIoTFleetHubEndpointResolver EndpointResolver =
             new AmazonIoTFleetHubEndpointResolver();
diff --git a/sdk/src/Services/IoTFleetHub/Properties/AssemblyInfo.cs b/sdk/src/Services/IoTFleetHub/Properties/AssemblyInfo.cs
index d1fa4f140ae3..34db30abe132 100644
--- a/sdk/src/Services/IoTFleetHub/Properties/AssemblyInfo.cs
+++ b/sdk/src/Services/IoTFleetHub/Properties/AssemblyInfo.cs
@@ -41,5 +41,9 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.300.85")]
\ No newline at end of file
+#if BCL
+[assembly: AssemblyVersion("4.0")]
+#else
+[assembly: AssemblyVersion("4.0.0.0")]
+#endif
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/src/Services/IoTFleetWise/AWSSDK.IoTFleetWise.NetFramework.csproj b/sdk/src/Services/IoTFleetWise/AWSSDK.IoTFleetWise.NetFramework.csproj
index f1fa338bbbe4..b50d6febdc31 100644
--- a/sdk/src/Services/IoTFleetWise/AWSSDK.IoTFleetWise.NetFramework.csproj
+++ b/sdk/src/Services/IoTFleetWise/AWSSDK.IoTFleetWise.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);BCL;AWS_ASYNC_API;CODE_ANALYSIS</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(RuleSetFileForBuild)' == 'false' Or '$(RuleSetFileForBuild)' == '' ">
diff --git a/sdk/src/Services/IoTFleetWise/AWSSDK.IoTFleetWise.NetStandard.csproj b/sdk/src/Services/IoTFleetWise/AWSSDK.IoTFleetWise.NetStandard.csproj
index ef317978817b..b057173fcaf5 100644
--- a/sdk/src/Services/IoTFleetWise/AWSSDK.IoTFleetWise.NetStandard.csproj
+++ b/sdk/src/Services/IoTFleetWise/AWSSDK.IoTFleetWise.NetStandard.csproj
@@ -22,6 +22,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <!-- Async Enumerable Compatibility -->
diff --git a/sdk/src/Services/IoTFleetWise/Generated/AmazonIoTFleetWiseConfig.cs b/sdk/src/Services/IoTFleetWise/Generated/AmazonIoTFleetWiseConfig.cs
index 91738b760d4a..6aa60c07b0e8 100644
--- a/sdk/src/Services/IoTFleetWise/Generated/AmazonIoTFleetWiseConfig.cs
+++ b/sdk/src/Services/IoTFleetWise/Generated/AmazonIoTFleetWiseConfig.cs
@@ -34,7 +34,7 @@ namespace Amazon.IoTFleetWise
     public partial class AmazonIoTFleetWiseConfig : ClientConfig
     {
         private static readonly string UserAgentString =
-            InternalSDKUtils.BuildUserAgentString("IoTFleetWise", "3.7.303.47");
+            InternalSDKUtils.BuildUserAgentString("IoTFleetWise", "4.0.0.0");
 
         private static readonly AmazonIoTFleetWiseEndpointResolver EndpointResolver =
             new AmazonIoTFleetWiseEndpointResolver();
diff --git a/sdk/src/Services/IoTFleetWise/Properties/AssemblyInfo.cs b/sdk/src/Services/IoTFleetWise/Properties/AssemblyInfo.cs
index 4a2df91efc00..9db947a345c1 100644
--- a/sdk/src/Services/IoTFleetWise/Properties/AssemblyInfo.cs
+++ b/sdk/src/Services/IoTFleetWise/Properties/AssemblyInfo.cs
@@ -41,5 +41,9 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.303.47")]
\ No newline at end of file
+#if BCL
+[assembly: AssemblyVersion("4.0")]
+#else
+[assembly: AssemblyVersion("4.0.0.0")]
+#endif
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/src/Services/IoTJobsDataPlane/AWSSDK.IoTJobsDataPlane.NetFramework.csproj b/sdk/src/Services/IoTJobsDataPlane/AWSSDK.IoTJobsDataPlane.NetFramework.csproj
index 8b2fca53a0ce..6dd08804f37c 100644
--- a/sdk/src/Services/IoTJobsDataPlane/AWSSDK.IoTJobsDataPlane.NetFramework.csproj
+++ b/sdk/src/Services/IoTJobsDataPlane/AWSSDK.IoTJobsDataPlane.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);BCL;AWS_ASYNC_API;CODE_ANALYSIS</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(RuleSetFileForBuild)' == 'false' Or '$(RuleSetFileForBuild)' == '' ">
diff --git a/sdk/src/Services/IoTJobsDataPlane/AWSSDK.IoTJobsDataPlane.NetStandard.csproj b/sdk/src/Services/IoTJobsDataPlane/AWSSDK.IoTJobsDataPlane.NetStandard.csproj
index 4115e3c13b8e..6e62e15907b9 100644
--- a/sdk/src/Services/IoTJobsDataPlane/AWSSDK.IoTJobsDataPlane.NetStandard.csproj
+++ b/sdk/src/Services/IoTJobsDataPlane/AWSSDK.IoTJobsDataPlane.NetStandard.csproj
@@ -22,6 +22,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <!-- Async Enumerable Compatibility -->
diff --git a/sdk/src/Services/IoTJobsDataPlane/Generated/AmazonIoTJobsDataPlaneConfig.cs b/sdk/src/Services/IoTJobsDataPlane/Generated/AmazonIoTJobsDataPlaneConfig.cs
index ddcf715b36c8..342f2ebf1574 100644
--- a/sdk/src/Services/IoTJobsDataPlane/Generated/AmazonIoTJobsDataPlaneConfig.cs
+++ b/sdk/src/Services/IoTJobsDataPlane/Generated/AmazonIoTJobsDataPlaneConfig.cs
@@ -34,7 +34,7 @@ namespace Amazon.IoTJobsDataPlane
     public partial class AmazonIoTJobsDataPlaneConfig : ClientConfig
     {
         private static readonly string UserAgentString =
-            InternalSDKUtils.BuildUserAgentString("IoT Jobs Data Plane", "3.7.300.84");
+            InternalSDKUtils.BuildUserAgentString("IoT Jobs Data Plane", "4.0.0.0");
 
         private static readonly AmazonIoTJobsDataPlaneEndpointResolver EndpointResolver =
             new AmazonIoTJobsDataPlaneEndpointResolver();
diff --git a/sdk/src/Services/IoTJobsDataPlane/Properties/AssemblyInfo.cs b/sdk/src/Services/IoTJobsDataPlane/Properties/AssemblyInfo.cs
index 33273140b6d3..b95f19233e19 100644
--- a/sdk/src/Services/IoTJobsDataPlane/Properties/AssemblyInfo.cs
+++ b/sdk/src/Services/IoTJobsDataPlane/Properties/AssemblyInfo.cs
@@ -41,5 +41,9 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.300.84")]
\ No newline at end of file
+#if BCL
+[assembly: AssemblyVersion("4.0")]
+#else
+[assembly: AssemblyVersion("4.0.0.0")]
+#endif
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/src/Services/IoTSecureTunneling/AWSSDK.IoTSecureTunneling.NetFramework.csproj b/sdk/src/Services/IoTSecureTunneling/AWSSDK.IoTSecureTunneling.NetFramework.csproj
index fe4365b12a0b..96763c3f0026 100644
--- a/sdk/src/Services/IoTSecureTunneling/AWSSDK.IoTSecureTunneling.NetFramework.csproj
+++ b/sdk/src/Services/IoTSecureTunneling/AWSSDK.IoTSecureTunneling.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);BCL;AWS_ASYNC_API;CODE_ANALYSIS</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(RuleSetFileForBuild)' == 'false' Or '$(RuleSetFileForBuild)' == '' ">
diff --git a/sdk/src/Services/IoTSecureTunneling/AWSSDK.IoTSecureTunneling.NetStandard.csproj b/sdk/src/Services/IoTSecureTunneling/AWSSDK.IoTSecureTunneling.NetStandard.csproj
index 639d73fac61b..c14755be3f8a 100644
--- a/sdk/src/Services/IoTSecureTunneling/AWSSDK.IoTSecureTunneling.NetStandard.csproj
+++ b/sdk/src/Services/IoTSecureTunneling/AWSSDK.IoTSecureTunneling.NetStandard.csproj
@@ -22,6 +22,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <!-- Async Enumerable Compatibility -->
diff --git a/sdk/src/Services/IoTSecureTunneling/Generated/AmazonIoTSecureTunnelingConfig.cs b/sdk/src/Services/IoTSecureTunneling/Generated/AmazonIoTSecureTunnelingConfig.cs
index d88291c49cd6..aa34c955243b 100644
--- a/sdk/src/Services/IoTSecureTunneling/Generated/AmazonIoTSecureTunnelingConfig.cs
+++ b/sdk/src/Services/IoTSecureTunneling/Generated/AmazonIoTSecureTunnelingConfig.cs
@@ -34,7 +34,7 @@ namespace Amazon.IoTSecureTunneling
     public partial class AmazonIoTSecureTunnelingConfig : ClientConfig
     {
         private static readonly string UserAgentString =
-            InternalSDKUtils.BuildUserAgentString("IoTSecureTunneling", "3.7.300.84");
+            InternalSDKUtils.BuildUserAgentString("IoTSecureTunneling", "4.0.0.0");
 
         private static readonly AmazonIoTSecureTunnelingEndpointResolver EndpointResolver =
             new AmazonIoTSecureTunnelingEndpointResolver();
diff --git a/sdk/src/Services/IoTSecureTunneling/Properties/AssemblyInfo.cs b/sdk/src/Services/IoTSecureTunneling/Properties/AssemblyInfo.cs
index 2bdefed8cfda..8eaf02787bee 100644
--- a/sdk/src/Services/IoTSecureTunneling/Properties/AssemblyInfo.cs
+++ b/sdk/src/Services/IoTSecureTunneling/Properties/AssemblyInfo.cs
@@ -41,5 +41,9 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.300.84")]
\ No newline at end of file
+#if BCL
+[assembly: AssemblyVersion("4.0")]
+#else
+[assembly: AssemblyVersion("4.0.0.0")]
+#endif
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/src/Services/IoTSiteWise/AWSSDK.IoTSiteWise.NetFramework.csproj b/sdk/src/Services/IoTSiteWise/AWSSDK.IoTSiteWise.NetFramework.csproj
index 2f432a06318e..e9174b316d14 100644
--- a/sdk/src/Services/IoTSiteWise/AWSSDK.IoTSiteWise.NetFramework.csproj
+++ b/sdk/src/Services/IoTSiteWise/AWSSDK.IoTSiteWise.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);BCL;AWS_ASYNC_API;CODE_ANALYSIS</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(RuleSetFileForBuild)' == 'false' Or '$(RuleSetFileForBuild)' == '' ">
diff --git a/sdk/src/Services/IoTSiteWise/AWSSDK.IoTSiteWise.NetStandard.csproj b/sdk/src/Services/IoTSiteWise/AWSSDK.IoTSiteWise.NetStandard.csproj
index eaac493f6b92..76c22994b797 100644
--- a/sdk/src/Services/IoTSiteWise/AWSSDK.IoTSiteWise.NetStandard.csproj
+++ b/sdk/src/Services/IoTSiteWise/AWSSDK.IoTSiteWise.NetStandard.csproj
@@ -22,6 +22,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <!-- Async Enumerable Compatibility -->
diff --git a/sdk/src/Services/IoTSiteWise/Generated/AmazonIoTSiteWiseConfig.cs b/sdk/src/Services/IoTSiteWise/Generated/AmazonIoTSiteWiseConfig.cs
index a61b155c2e76..b53499322563 100644
--- a/sdk/src/Services/IoTSiteWise/Generated/AmazonIoTSiteWiseConfig.cs
+++ b/sdk/src/Services/IoTSiteWise/Generated/AmazonIoTSiteWiseConfig.cs
@@ -34,7 +34,7 @@ namespace Amazon.IoTSiteWise
     public partial class AmazonIoTSiteWiseConfig : ClientConfig
     {
         private static readonly string UserAgentString =
-            InternalSDKUtils.BuildUserAgentString("IoTSiteWise", "3.7.301.77");
+            InternalSDKUtils.BuildUserAgentString("IoTSiteWise", "4.0.0.0");
 
         private static readonly AmazonIoTSiteWiseEndpointResolver EndpointResolver =
             new AmazonIoTSiteWiseEndpointResolver();
diff --git a/sdk/src/Services/IoTSiteWise/Properties/AssemblyInfo.cs b/sdk/src/Services/IoTSiteWise/Properties/AssemblyInfo.cs
index 4b8c4ad9286c..d14c12386262 100644
--- a/sdk/src/Services/IoTSiteWise/Properties/AssemblyInfo.cs
+++ b/sdk/src/Services/IoTSiteWise/Properties/AssemblyInfo.cs
@@ -41,5 +41,9 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.301.77")]
\ No newline at end of file
+#if BCL
+[assembly: AssemblyVersion("4.0")]
+#else
+[assembly: AssemblyVersion("4.0.0.0")]
+#endif
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/src/Services/IoTThingsGraph/AWSSDK.IoTThingsGraph.NetFramework.csproj b/sdk/src/Services/IoTThingsGraph/AWSSDK.IoTThingsGraph.NetFramework.csproj
index 90cdff95ca09..e96cc3c36a71 100644
--- a/sdk/src/Services/IoTThingsGraph/AWSSDK.IoTThingsGraph.NetFramework.csproj
+++ b/sdk/src/Services/IoTThingsGraph/AWSSDK.IoTThingsGraph.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);BCL;AWS_ASYNC_API;CODE_ANALYSIS</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(RuleSetFileForBuild)' == 'false' Or '$(RuleSetFileForBuild)' == '' ">
diff --git a/sdk/src/Services/IoTThingsGraph/AWSSDK.IoTThingsGraph.NetStandard.csproj b/sdk/src/Services/IoTThingsGraph/AWSSDK.IoTThingsGraph.NetStandard.csproj
index e86597f3a8ba..078779f2a79c 100644
--- a/sdk/src/Services/IoTThingsGraph/AWSSDK.IoTThingsGraph.NetStandard.csproj
+++ b/sdk/src/Services/IoTThingsGraph/AWSSDK.IoTThingsGraph.NetStandard.csproj
@@ -22,6 +22,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <!-- Async Enumerable Compatibility -->
diff --git a/sdk/src/Services/IoTThingsGraph/Generated/AmazonIoTThingsGraphConfig.cs b/sdk/src/Services/IoTThingsGraph/Generated/AmazonIoTThingsGraphConfig.cs
index bcacf5ef6213..970886423974 100644
--- a/sdk/src/Services/IoTThingsGraph/Generated/AmazonIoTThingsGraphConfig.cs
+++ b/sdk/src/Services/IoTThingsGraph/Generated/AmazonIoTThingsGraphConfig.cs
@@ -34,7 +34,7 @@ namespace Amazon.IoTThingsGraph
     public partial class AmazonIoTThingsGraphConfig : ClientConfig
     {
         private static readonly string UserAgentString =
-            InternalSDKUtils.BuildUserAgentString("IoTThingsGraph", "3.7.300.84");
+            InternalSDKUtils.BuildUserAgentString("IoTThingsGraph", "4.0.0.0");
 
         private static readonly AmazonIoTThingsGraphEndpointResolver EndpointResolver =
             new AmazonIoTThingsGraphEndpointResolver();
diff --git a/sdk/src/Services/IoTThingsGraph/Properties/AssemblyInfo.cs b/sdk/src/Services/IoTThingsGraph/Properties/AssemblyInfo.cs
index ed31a7387fd5..c729ab40005b 100644
--- a/sdk/src/Services/IoTThingsGraph/Properties/AssemblyInfo.cs
+++ b/sdk/src/Services/IoTThingsGraph/Properties/AssemblyInfo.cs
@@ -41,5 +41,9 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.300.84")]
\ No newline at end of file
+#if BCL
+[assembly: AssemblyVersion("4.0")]
+#else
+[assembly: AssemblyVersion("4.0.0.0")]
+#endif
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/src/Services/IoTTwinMaker/AWSSDK.IoTTwinMaker.NetFramework.csproj b/sdk/src/Services/IoTTwinMaker/AWSSDK.IoTTwinMaker.NetFramework.csproj
index 5f5a13c29e8c..4268169df2b6 100644
--- a/sdk/src/Services/IoTTwinMaker/AWSSDK.IoTTwinMaker.NetFramework.csproj
+++ b/sdk/src/Services/IoTTwinMaker/AWSSDK.IoTTwinMaker.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);BCL;AWS_ASYNC_API;CODE_ANALYSIS</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(RuleSetFileForBuild)' == 'false' Or '$(RuleSetFileForBuild)' == '' ">
diff --git a/sdk/src/Services/IoTTwinMaker/AWSSDK.IoTTwinMaker.NetStandard.csproj b/sdk/src/Services/IoTTwinMaker/AWSSDK.IoTTwinMaker.NetStandard.csproj
index 89e194dd4c52..6fbc33bca41a 100644
--- a/sdk/src/Services/IoTTwinMaker/AWSSDK.IoTTwinMaker.NetStandard.csproj
+++ b/sdk/src/Services/IoTTwinMaker/AWSSDK.IoTTwinMaker.NetStandard.csproj
@@ -22,6 +22,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <!-- Async Enumerable Compatibility -->
diff --git a/sdk/src/Services/IoTTwinMaker/Generated/AmazonIoTTwinMakerConfig.cs b/sdk/src/Services/IoTTwinMaker/Generated/AmazonIoTTwinMakerConfig.cs
index d3fb72fad6d8..e0bd079c71b3 100644
--- a/sdk/src/Services/IoTTwinMaker/Generated/AmazonIoTTwinMakerConfig.cs
+++ b/sdk/src/Services/IoTTwinMaker/Generated/AmazonIoTTwinMakerConfig.cs
@@ -34,7 +34,7 @@ namespace Amazon.IoTTwinMaker
     public partial class AmazonIoTTwinMakerConfig : ClientConfig
     {
         private static readonly string UserAgentString =
-            InternalSDKUtils.BuildUserAgentString("IoTTwinMaker", "3.7.301.77");
+            InternalSDKUtils.BuildUserAgentString("IoTTwinMaker", "4.0.0.0");
 
         private static readonly AmazonIoTTwinMakerEndpointResolver EndpointResolver =
             new AmazonIoTTwinMakerEndpointResolver();
diff --git a/sdk/src/Services/IoTTwinMaker/Properties/AssemblyInfo.cs b/sdk/src/Services/IoTTwinMaker/Properties/AssemblyInfo.cs
index 3f2b8aa61959..3680aa6ab7c6 100644
--- a/sdk/src/Services/IoTTwinMaker/Properties/AssemblyInfo.cs
+++ b/sdk/src/Services/IoTTwinMaker/Properties/AssemblyInfo.cs
@@ -41,5 +41,9 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.301.77")]
\ No newline at end of file
+#if BCL
+[assembly: AssemblyVersion("4.0")]
+#else
+[assembly: AssemblyVersion("4.0.0.0")]
+#endif
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/src/Services/IoTWireless/AWSSDK.IoTWireless.NetFramework.csproj b/sdk/src/Services/IoTWireless/AWSSDK.IoTWireless.NetFramework.csproj
index 3801fc7fda93..e82da0722fbb 100644
--- a/sdk/src/Services/IoTWireless/AWSSDK.IoTWireless.NetFramework.csproj
+++ b/sdk/src/Services/IoTWireless/AWSSDK.IoTWireless.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);BCL;AWS_ASYNC_API;CODE_ANALYSIS</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(RuleSetFileForBuild)' == 'false' Or '$(RuleSetFileForBuild)' == '' ">
diff --git a/sdk/src/Services/IoTWireless/AWSSDK.IoTWireless.NetStandard.csproj b/sdk/src/Services/IoTWireless/AWSSDK.IoTWireless.NetStandard.csproj
index 3df6566cd82a..23279551fec5 100644
--- a/sdk/src/Services/IoTWireless/AWSSDK.IoTWireless.NetStandard.csproj
+++ b/sdk/src/Services/IoTWireless/AWSSDK.IoTWireless.NetStandard.csproj
@@ -22,6 +22,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <!-- Async Enumerable Compatibility -->
diff --git a/sdk/src/Services/IoTWireless/Generated/AmazonIoTWirelessConfig.cs b/sdk/src/Services/IoTWireless/Generated/AmazonIoTWirelessConfig.cs
index d66c5e51e2b2..73eb0772e8c9 100644
--- a/sdk/src/Services/IoTWireless/Generated/AmazonIoTWirelessConfig.cs
+++ b/sdk/src/Services/IoTWireless/Generated/AmazonIoTWirelessConfig.cs
@@ -34,7 +34,7 @@ namespace Amazon.IoTWireless
     public partial class AmazonIoTWirelessConfig : ClientConfig
     {
         private static readonly string UserAgentString =
-            InternalSDKUtils.BuildUserAgentString("IoT Wireless", "3.7.302.9");
+            InternalSDKUtils.BuildUserAgentString("IoT Wireless", "4.0.0.0");
 
         private static readonly AmazonIoTWirelessEndpointResolver EndpointResolver =
             new AmazonIoTWirelessEndpointResolver();
diff --git a/sdk/src/Services/IoTWireless/Properties/AssemblyInfo.cs b/sdk/src/Services/IoTWireless/Properties/AssemblyInfo.cs
index 8b9aa45ad053..ee0e7d66ee5d 100644
--- a/sdk/src/Services/IoTWireless/Properties/AssemblyInfo.cs
+++ b/sdk/src/Services/IoTWireless/Properties/AssemblyInfo.cs
@@ -41,5 +41,9 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.302.9")]
\ No newline at end of file
+#if BCL
+[assembly: AssemblyVersion("4.0")]
+#else
+[assembly: AssemblyVersion("4.0.0.0")]
+#endif
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/src/Services/IotData/AWSSDK.IotData.NetFramework.csproj b/sdk/src/Services/IotData/AWSSDK.IotData.NetFramework.csproj
index 0c43b78e538e..34f3fc94903a 100644
--- a/sdk/src/Services/IotData/AWSSDK.IotData.NetFramework.csproj
+++ b/sdk/src/Services/IotData/AWSSDK.IotData.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);BCL;AWS_ASYNC_API;CODE_ANALYSIS</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(RuleSetFileForBuild)' == 'false' Or '$(RuleSetFileForBuild)' == '' ">
diff --git a/sdk/src/Services/IotData/AWSSDK.IotData.NetStandard.csproj b/sdk/src/Services/IotData/AWSSDK.IotData.NetStandard.csproj
index 1631ea5baef3..53605b8ed8ed 100644
--- a/sdk/src/Services/IotData/AWSSDK.IotData.NetStandard.csproj
+++ b/sdk/src/Services/IotData/AWSSDK.IotData.NetStandard.csproj
@@ -22,6 +22,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <!-- Async Enumerable Compatibility -->
diff --git a/sdk/src/Services/IotData/Generated/AmazonIotDataConfig.cs b/sdk/src/Services/IotData/Generated/AmazonIotDataConfig.cs
index e4d925041edc..54ea27312e98 100644
--- a/sdk/src/Services/IotData/Generated/AmazonIotDataConfig.cs
+++ b/sdk/src/Services/IotData/Generated/AmazonIotDataConfig.cs
@@ -34,7 +34,7 @@ namespace Amazon.IotData
     public partial class AmazonIotDataConfig : ClientConfig
     {
         private static readonly string UserAgentString =
-            InternalSDKUtils.BuildUserAgentString("IoT Data Plane", "3.7.300.84");
+            InternalSDKUtils.BuildUserAgentString("IoT Data Plane", "4.0.0.0");
 
         private static readonly AmazonIotDataEndpointResolver EndpointResolver =
             new AmazonIotDataEndpointResolver();
diff --git a/sdk/src/Services/IotData/Properties/AssemblyInfo.cs b/sdk/src/Services/IotData/Properties/AssemblyInfo.cs
index 6a9d5fd2e904..34a1317ade4e 100644
--- a/sdk/src/Services/IotData/Properties/AssemblyInfo.cs
+++ b/sdk/src/Services/IotData/Properties/AssemblyInfo.cs
@@ -41,5 +41,9 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.300.84")]
\ No newline at end of file
+#if BCL
+[assembly: AssemblyVersion("4.0")]
+#else
+[assembly: AssemblyVersion("4.0.0.0")]
+#endif
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/src/Services/Ivschat/AWSSDK.Ivschat.NetFramework.csproj b/sdk/src/Services/Ivschat/AWSSDK.Ivschat.NetFramework.csproj
index ccb65e2ec6a6..edfbfcad3f75 100644
--- a/sdk/src/Services/Ivschat/AWSSDK.Ivschat.NetFramework.csproj
+++ b/sdk/src/Services/Ivschat/AWSSDK.Ivschat.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);BCL;AWS_ASYNC_API;CODE_ANALYSIS</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(RuleSetFileForBuild)' == 'false' Or '$(RuleSetFileForBuild)' == '' ">
diff --git a/sdk/src/Services/Ivschat/AWSSDK.Ivschat.NetStandard.csproj b/sdk/src/Services/Ivschat/AWSSDK.Ivschat.NetStandard.csproj
index 74246f4c53a6..c7caa8d37d13 100644
--- a/sdk/src/Services/Ivschat/AWSSDK.Ivschat.NetStandard.csproj
+++ b/sdk/src/Services/Ivschat/AWSSDK.Ivschat.NetStandard.csproj
@@ -22,6 +22,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <!-- Async Enumerable Compatibility -->
diff --git a/sdk/src/Services/Ivschat/Generated/AmazonIvschatConfig.cs b/sdk/src/Services/Ivschat/Generated/AmazonIvschatConfig.cs
index 18b659bb228c..25dea19a5f73 100644
--- a/sdk/src/Services/Ivschat/Generated/AmazonIvschatConfig.cs
+++ b/sdk/src/Services/Ivschat/Generated/AmazonIvschatConfig.cs
@@ -34,7 +34,7 @@ namespace Amazon.Ivschat
     public partial class AmazonIvschatConfig : ClientConfig
     {
         private static readonly string UserAgentString =
-            InternalSDKUtils.BuildUserAgentString("ivschat", "3.7.301.79");
+            InternalSDKUtils.BuildUserAgentString("ivschat", "4.0.0.0");
 
         private static readonly AmazonIvschatEndpointResolver EndpointResolver =
             new AmazonIvschatEndpointResolver();
diff --git a/sdk/src/Services/Ivschat/Properties/AssemblyInfo.cs b/sdk/src/Services/Ivschat/Properties/AssemblyInfo.cs
index f858f3ff1017..1a11b732299e 100644
--- a/sdk/src/Services/Ivschat/Properties/AssemblyInfo.cs
+++ b/sdk/src/Services/Ivschat/Properties/AssemblyInfo.cs
@@ -41,5 +41,9 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.301.79")]
\ No newline at end of file
+#if BCL
+[assembly: AssemblyVersion("4.0")]
+#else
+[assembly: AssemblyVersion("4.0.0.0")]
+#endif
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/src/Services/Kafka/AWSSDK.Kafka.NetFramework.csproj b/sdk/src/Services/Kafka/AWSSDK.Kafka.NetFramework.csproj
index 1835108c81cd..aee426b678a9 100644
--- a/sdk/src/Services/Kafka/AWSSDK.Kafka.NetFramework.csproj
+++ b/sdk/src/Services/Kafka/AWSSDK.Kafka.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);BCL;AWS_ASYNC_API;CODE_ANALYSIS</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(RuleSetFileForBuild)' == 'false' Or '$(RuleSetFileForBuild)' == '' ">
diff --git a/sdk/src/Services/Kafka/AWSSDK.Kafka.NetStandard.csproj b/sdk/src/Services/Kafka/AWSSDK.Kafka.NetStandard.csproj
index 6fc6ec297986..36192eff2a2b 100644
--- a/sdk/src/Services/Kafka/AWSSDK.Kafka.NetStandard.csproj
+++ b/sdk/src/Services/Kafka/AWSSDK.Kafka.NetStandard.csproj
@@ -22,6 +22,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <!-- Async Enumerable Compatibility -->
diff --git a/sdk/src/Services/Kafka/Generated/AmazonKafkaConfig.cs b/sdk/src/Services/Kafka/Generated/AmazonKafkaConfig.cs
index 27d7c479c69c..97e07cce7177 100644
--- a/sdk/src/Services/Kafka/Generated/AmazonKafkaConfig.cs
+++ b/sdk/src/Services/Kafka/Generated/AmazonKafkaConfig.cs
@@ -34,7 +34,7 @@ namespace Amazon.Kafka
     public partial class AmazonKafkaConfig : ClientConfig
     {
         private static readonly string UserAgentString =
-            InternalSDKUtils.BuildUserAgentString("Kafka", "3.7.302.29");
+            InternalSDKUtils.BuildUserAgentString("Kafka", "4.0.0.0");
 
         private static readonly AmazonKafkaEndpointResolver EndpointResolver =
             new AmazonKafkaEndpointResolver();
diff --git a/sdk/src/Services/Kafka/Properties/AssemblyInfo.cs b/sdk/src/Services/Kafka/Properties/AssemblyInfo.cs
index 372496026bd6..1f6c26925d83 100644
--- a/sdk/src/Services/Kafka/Properties/AssemblyInfo.cs
+++ b/sdk/src/Services/Kafka/Properties/AssemblyInfo.cs
@@ -41,5 +41,9 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.302.29")]
\ No newline at end of file
+#if BCL
+[assembly: AssemblyVersion("4.0")]
+#else
+[assembly: AssemblyVersion("4.0.0.0")]
+#endif
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/src/Services/KafkaConnect/AWSSDK.KafkaConnect.NetFramework.csproj b/sdk/src/Services/KafkaConnect/AWSSDK.KafkaConnect.NetFramework.csproj
index 53f10ce28584..84e3ddc65f51 100644
--- a/sdk/src/Services/KafkaConnect/AWSSDK.KafkaConnect.NetFramework.csproj
+++ b/sdk/src/Services/KafkaConnect/AWSSDK.KafkaConnect.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);BCL;AWS_ASYNC_API;CODE_ANALYSIS</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(RuleSetFileForBuild)' == 'false' Or '$(RuleSetFileForBuild)' == '' ">
diff --git a/sdk/src/Services/KafkaConnect/AWSSDK.KafkaConnect.NetStandard.csproj b/sdk/src/Services/KafkaConnect/AWSSDK.KafkaConnect.NetStandard.csproj
index d046b873e858..08c7737ea815 100644
--- a/sdk/src/Services/KafkaConnect/AWSSDK.KafkaConnect.NetStandard.csproj
+++ b/sdk/src/Services/KafkaConnect/AWSSDK.KafkaConnect.NetStandard.csproj
@@ -22,6 +22,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <!-- Async Enumerable Compatibility -->
diff --git a/sdk/src/Services/KafkaConnect/Generated/AmazonKafkaConnectConfig.cs b/sdk/src/Services/KafkaConnect/Generated/AmazonKafkaConnectConfig.cs
index d7ae3b5ae57d..a6568a474375 100644
--- a/sdk/src/Services/KafkaConnect/Generated/AmazonKafkaConnectConfig.cs
+++ b/sdk/src/Services/KafkaConnect/Generated/AmazonKafkaConnectConfig.cs
@@ -34,7 +34,7 @@ namespace Amazon.KafkaConnect
     public partial class AmazonKafkaConnectConfig : ClientConfig
     {
         private static readonly string UserAgentString =
-            InternalSDKUtils.BuildUserAgentString("KafkaConnect", "3.7.301.32");
+            InternalSDKUtils.BuildUserAgentString("KafkaConnect", "4.0.0.0");
 
         private static readonly AmazonKafkaConnectEndpointResolver EndpointResolver =
             new AmazonKafkaConnectEndpointResolver();
diff --git a/sdk/src/Services/KafkaConnect/Properties/AssemblyInfo.cs b/sdk/src/Services/KafkaConnect/Properties/AssemblyInfo.cs
index e91ca6299b59..d5425a1c05af 100644
--- a/sdk/src/Services/KafkaConnect/Properties/AssemblyInfo.cs
+++ b/sdk/src/Services/KafkaConnect/Properties/AssemblyInfo.cs
@@ -41,5 +41,9 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.301.32")]
\ No newline at end of file
+#if BCL
+[assembly: AssemblyVersion("4.0")]
+#else
+[assembly: AssemblyVersion("4.0.0.0")]
+#endif
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/src/Services/Kendra/AWSSDK.Kendra.NetFramework.csproj b/sdk/src/Services/Kendra/AWSSDK.Kendra.NetFramework.csproj
index c4f54aad2660..0094332219d8 100644
--- a/sdk/src/Services/Kendra/AWSSDK.Kendra.NetFramework.csproj
+++ b/sdk/src/Services/Kendra/AWSSDK.Kendra.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);BCL;AWS_ASYNC_API;CODE_ANALYSIS</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(RuleSetFileForBuild)' == 'false' Or '$(RuleSetFileForBuild)' == '' ">
diff --git a/sdk/src/Services/Kendra/AWSSDK.Kendra.NetStandard.csproj b/sdk/src/Services/Kendra/AWSSDK.Kendra.NetStandard.csproj
index 3bca382ff056..cd41680fec55 100644
--- a/sdk/src/Services/Kendra/AWSSDK.Kendra.NetStandard.csproj
+++ b/sdk/src/Services/Kendra/AWSSDK.Kendra.NetStandard.csproj
@@ -22,6 +22,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <!-- Async Enumerable Compatibility -->
diff --git a/sdk/src/Services/Kendra/Generated/AmazonKendraConfig.cs b/sdk/src/Services/Kendra/Generated/AmazonKendraConfig.cs
index 7bf6bbfa4c6d..fc16a48c9221 100644
--- a/sdk/src/Services/Kendra/Generated/AmazonKendraConfig.cs
+++ b/sdk/src/Services/Kendra/Generated/AmazonKendraConfig.cs
@@ -34,7 +34,7 @@ namespace Amazon.Kendra
     public partial class AmazonKendraConfig : ClientConfig
     {
         private static readonly string UserAgentString =
-            InternalSDKUtils.BuildUserAgentString("kendra", "3.7.301.24");
+            InternalSDKUtils.BuildUserAgentString("kendra", "4.0.0.0");
 
         private static readonly AmazonKendraEndpointResolver EndpointResolver =
             new AmazonKendraEndpointResolver();
diff --git a/sdk/src/Services/Kendra/Properties/AssemblyInfo.cs b/sdk/src/Services/Kendra/Properties/AssemblyInfo.cs
index 591aa3d86ed2..5b510845b68b 100644
--- a/sdk/src/Services/Kendra/Properties/AssemblyInfo.cs
+++ b/sdk/src/Services/Kendra/Properties/AssemblyInfo.cs
@@ -41,5 +41,9 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.301.24")]
\ No newline at end of file
+#if BCL
+[assembly: AssemblyVersion("4.0")]
+#else
+[assembly: AssemblyVersion("4.0.0.0")]
+#endif
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/src/Services/KendraRanking/AWSSDK.KendraRanking.NetFramework.csproj b/sdk/src/Services/KendraRanking/AWSSDK.KendraRanking.NetFramework.csproj
index 921ddd6add76..2811c52479b8 100644
--- a/sdk/src/Services/KendraRanking/AWSSDK.KendraRanking.NetFramework.csproj
+++ b/sdk/src/Services/KendraRanking/AWSSDK.KendraRanking.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);BCL;AWS_ASYNC_API;CODE_ANALYSIS</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(RuleSetFileForBuild)' == 'false' Or '$(RuleSetFileForBuild)' == '' ">
diff --git a/sdk/src/Services/KendraRanking/AWSSDK.KendraRanking.NetStandard.csproj b/sdk/src/Services/KendraRanking/AWSSDK.KendraRanking.NetStandard.csproj
index bcb38b95c84a..9d03b9cbbd40 100644
--- a/sdk/src/Services/KendraRanking/AWSSDK.KendraRanking.NetStandard.csproj
+++ b/sdk/src/Services/KendraRanking/AWSSDK.KendraRanking.NetStandard.csproj
@@ -22,6 +22,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <!-- Async Enumerable Compatibility -->
diff --git a/sdk/src/Services/KendraRanking/Generated/AmazonKendraRankingConfig.cs b/sdk/src/Services/KendraRanking/Generated/AmazonKendraRankingConfig.cs
index 23efb25f524c..f57a3d835077 100644
--- a/sdk/src/Services/KendraRanking/Generated/AmazonKendraRankingConfig.cs
+++ b/sdk/src/Services/KendraRanking/Generated/AmazonKendraRankingConfig.cs
@@ -34,7 +34,7 @@ namespace Amazon.KendraRanking
     public partial class AmazonKendraRankingConfig : ClientConfig
     {
         private static readonly string UserAgentString =
-            InternalSDKUtils.BuildUserAgentString("Kendra Ranking", "3.7.300.84");
+            InternalSDKUtils.BuildUserAgentString("Kendra Ranking", "4.0.0.0");
 
         private static readonly AmazonKendraRankingEndpointResolver EndpointResolver =
             new AmazonKendraRankingEndpointResolver();
diff --git a/sdk/src/Services/KendraRanking/Properties/AssemblyInfo.cs b/sdk/src/Services/KendraRanking/Properties/AssemblyInfo.cs
index c8ac16f1d373..accbe0c89072 100644
--- a/sdk/src/Services/KendraRanking/Properties/AssemblyInfo.cs
+++ b/sdk/src/Services/KendraRanking/Properties/AssemblyInfo.cs
@@ -41,5 +41,9 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.300.84")]
\ No newline at end of file
+#if BCL
+[assembly: AssemblyVersion("4.0")]
+#else
+[assembly: AssemblyVersion("4.0.0.0")]
+#endif
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/src/Services/KeyManagementService/AWSSDK.KeyManagementService.NetFramework.csproj b/sdk/src/Services/KeyManagementService/AWSSDK.KeyManagementService.NetFramework.csproj
index 759a9af116eb..3c982304f2c3 100644
--- a/sdk/src/Services/KeyManagementService/AWSSDK.KeyManagementService.NetFramework.csproj
+++ b/sdk/src/Services/KeyManagementService/AWSSDK.KeyManagementService.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);BCL;AWS_ASYNC_API;CODE_ANALYSIS</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(RuleSetFileForBuild)' == 'false' Or '$(RuleSetFileForBuild)' == '' ">
diff --git a/sdk/src/Services/KeyManagementService/AWSSDK.KeyManagementService.NetStandard.csproj b/sdk/src/Services/KeyManagementService/AWSSDK.KeyManagementService.NetStandard.csproj
index 1ccd47c8af8b..3144881e6b7f 100644
--- a/sdk/src/Services/KeyManagementService/AWSSDK.KeyManagementService.NetStandard.csproj
+++ b/sdk/src/Services/KeyManagementService/AWSSDK.KeyManagementService.NetStandard.csproj
@@ -22,6 +22,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <!-- Async Enumerable Compatibility -->
diff --git a/sdk/src/Services/KeyManagementService/Generated/AmazonKeyManagementServiceConfig.cs b/sdk/src/Services/KeyManagementService/Generated/AmazonKeyManagementServiceConfig.cs
index 86a8c343ff56..21fb01337109 100644
--- a/sdk/src/Services/KeyManagementService/Generated/AmazonKeyManagementServiceConfig.cs
+++ b/sdk/src/Services/KeyManagementService/Generated/AmazonKeyManagementServiceConfig.cs
@@ -34,7 +34,7 @@ namespace Amazon.KeyManagementService
     public partial class AmazonKeyManagementServiceConfig : ClientConfig
     {
         private static readonly string UserAgentString =
-            InternalSDKUtils.BuildUserAgentString("KMS", "3.7.302.10");
+            InternalSDKUtils.BuildUserAgentString("KMS", "4.0.0.0");
 
         private static readonly AmazonKeyManagementServiceEndpointResolver EndpointResolver =
             new AmazonKeyManagementServiceEndpointResolver();
diff --git a/sdk/src/Services/KeyManagementService/Properties/AssemblyInfo.cs b/sdk/src/Services/KeyManagementService/Properties/AssemblyInfo.cs
index 64e3ddea4480..7e60d59eb596 100644
--- a/sdk/src/Services/KeyManagementService/Properties/AssemblyInfo.cs
+++ b/sdk/src/Services/KeyManagementService/Properties/AssemblyInfo.cs
@@ -41,5 +41,9 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.302.10")]
\ No newline at end of file
+#if BCL
+[assembly: AssemblyVersion("4.0")]
+#else
+[assembly: AssemblyVersion("4.0.0.0")]
+#endif
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/src/Services/Keyspaces/AWSSDK.Keyspaces.NetFramework.csproj b/sdk/src/Services/Keyspaces/AWSSDK.Keyspaces.NetFramework.csproj
index 8a8e27f3b2b8..5919ac5b8777 100644
--- a/sdk/src/Services/Keyspaces/AWSSDK.Keyspaces.NetFramework.csproj
+++ b/sdk/src/Services/Keyspaces/AWSSDK.Keyspaces.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);BCL;AWS_ASYNC_API;CODE_ANALYSIS</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(RuleSetFileForBuild)' == 'false' Or '$(RuleSetFileForBuild)' == '' ">
diff --git a/sdk/src/Services/Keyspaces/AWSSDK.Keyspaces.NetStandard.csproj b/sdk/src/Services/Keyspaces/AWSSDK.Keyspaces.NetStandard.csproj
index 7401fe95e4cb..1bc7115fe004 100644
--- a/sdk/src/Services/Keyspaces/AWSSDK.Keyspaces.NetStandard.csproj
+++ b/sdk/src/Services/Keyspaces/AWSSDK.Keyspaces.NetStandard.csproj
@@ -22,6 +22,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <!-- Async Enumerable Compatibility -->
diff --git a/sdk/src/Services/Keyspaces/Generated/AmazonKeyspacesConfig.cs b/sdk/src/Services/Keyspaces/Generated/AmazonKeyspacesConfig.cs
index f68eea443cb5..16a3de48436e 100644
--- a/sdk/src/Services/Keyspaces/Generated/AmazonKeyspacesConfig.cs
+++ b/sdk/src/Services/Keyspaces/Generated/AmazonKeyspacesConfig.cs
@@ -34,7 +34,7 @@ namespace Amazon.Keyspaces
     public partial class AmazonKeyspacesConfig : ClientConfig
     {
         private static readonly string UserAgentString =
-            InternalSDKUtils.BuildUserAgentString("Keyspaces", "3.7.301.48");
+            InternalSDKUtils.BuildUserAgentString("Keyspaces", "4.0.0.0");
 
         private static readonly AmazonKeyspacesEndpointResolver EndpointResolver =
             new AmazonKeyspacesEndpointResolver();
diff --git a/sdk/src/Services/Keyspaces/Properties/AssemblyInfo.cs b/sdk/src/Services/Keyspaces/Properties/AssemblyInfo.cs
index 7276de1ba773..c9c72a80860e 100644
--- a/sdk/src/Services/Keyspaces/Properties/AssemblyInfo.cs
+++ b/sdk/src/Services/Keyspaces/Properties/AssemblyInfo.cs
@@ -41,5 +41,9 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.301.48")]
\ No newline at end of file
+#if BCL
+[assembly: AssemblyVersion("4.0")]
+#else
+[assembly: AssemblyVersion("4.0.0.0")]
+#endif
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/src/Services/Kinesis/AWSSDK.Kinesis.NetFramework.csproj b/sdk/src/Services/Kinesis/AWSSDK.Kinesis.NetFramework.csproj
index 3bcce1bec01e..903db7fa1b08 100644
--- a/sdk/src/Services/Kinesis/AWSSDK.Kinesis.NetFramework.csproj
+++ b/sdk/src/Services/Kinesis/AWSSDK.Kinesis.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);BCL;AWS_ASYNC_API;CODE_ANALYSIS</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(RuleSetFileForBuild)' == 'false' Or '$(RuleSetFileForBuild)' == '' ">
diff --git a/sdk/src/Services/Kinesis/AWSSDK.Kinesis.NetStandard.csproj b/sdk/src/Services/Kinesis/AWSSDK.Kinesis.NetStandard.csproj
index 3f623009c458..97a92ca4b160 100644
--- a/sdk/src/Services/Kinesis/AWSSDK.Kinesis.NetStandard.csproj
+++ b/sdk/src/Services/Kinesis/AWSSDK.Kinesis.NetStandard.csproj
@@ -22,6 +22,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <!-- Async Enumerable Compatibility -->
diff --git a/sdk/src/Services/Kinesis/Generated/AmazonKinesisConfig.cs b/sdk/src/Services/Kinesis/Generated/AmazonKinesisConfig.cs
index 6ccc81fcf4d8..21af4206dd3d 100644
--- a/sdk/src/Services/Kinesis/Generated/AmazonKinesisConfig.cs
+++ b/sdk/src/Services/Kinesis/Generated/AmazonKinesisConfig.cs
@@ -34,7 +34,7 @@ namespace Amazon.Kinesis
     public partial class AmazonKinesisConfig : ClientConfig
     {
         private static readonly string UserAgentString =
-            InternalSDKUtils.BuildUserAgentString("Kinesis", "3.7.301.77");
+            InternalSDKUtils.BuildUserAgentString("Kinesis", "4.0.0.0");
 
         private static readonly AmazonKinesisEndpointResolver EndpointResolver =
             new AmazonKinesisEndpointResolver();
diff --git a/sdk/src/Services/Kinesis/Properties/AssemblyInfo.cs b/sdk/src/Services/Kinesis/Properties/AssemblyInfo.cs
index ea8ca7915c1d..b1df4440fe14 100644
--- a/sdk/src/Services/Kinesis/Properties/AssemblyInfo.cs
+++ b/sdk/src/Services/Kinesis/Properties/AssemblyInfo.cs
@@ -41,5 +41,9 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.301.77")]
\ No newline at end of file
+#if BCL
+[assembly: AssemblyVersion("4.0")]
+#else
+[assembly: AssemblyVersion("4.0.0.0")]
+#endif
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/src/Services/KinesisAnalytics/AWSSDK.KinesisAnalytics.NetFramework.csproj b/sdk/src/Services/KinesisAnalytics/AWSSDK.KinesisAnalytics.NetFramework.csproj
index 70bedff3c245..bfb7c3144d73 100644
--- a/sdk/src/Services/KinesisAnalytics/AWSSDK.KinesisAnalytics.NetFramework.csproj
+++ b/sdk/src/Services/KinesisAnalytics/AWSSDK.KinesisAnalytics.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);BCL;AWS_ASYNC_API;CODE_ANALYSIS</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(RuleSetFileForBuild)' == 'false' Or '$(RuleSetFileForBuild)' == '' ">
diff --git a/sdk/src/Services/KinesisAnalytics/AWSSDK.KinesisAnalytics.NetStandard.csproj b/sdk/src/Services/KinesisAnalytics/AWSSDK.KinesisAnalytics.NetStandard.csproj
index a33d274b77df..a7ea20e85c00 100644
--- a/sdk/src/Services/KinesisAnalytics/AWSSDK.KinesisAnalytics.NetStandard.csproj
+++ b/sdk/src/Services/KinesisAnalytics/AWSSDK.KinesisAnalytics.NetStandard.csproj
@@ -22,6 +22,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <!-- Async Enumerable Compatibility -->
diff --git a/sdk/src/Services/KinesisAnalytics/Generated/AmazonKinesisAnalyticsConfig.cs b/sdk/src/Services/KinesisAnalytics/Generated/AmazonKinesisAnalyticsConfig.cs
index ff06c653c601..dce7efeb4bd5 100644
--- a/sdk/src/Services/KinesisAnalytics/Generated/AmazonKinesisAnalyticsConfig.cs
+++ b/sdk/src/Services/KinesisAnalytics/Generated/AmazonKinesisAnalyticsConfig.cs
@@ -34,7 +34,7 @@ namespace Amazon.KinesisAnalytics
     public partial class AmazonKinesisAnalyticsConfig : ClientConfig
     {
         private static readonly string UserAgentString =
-            InternalSDKUtils.BuildUserAgentString("Kinesis Analytics", "3.7.300.84");
+            InternalSDKUtils.BuildUserAgentString("Kinesis Analytics", "4.0.0.0");
 
         private static readonly AmazonKinesisAnalyticsEndpointResolver EndpointResolver =
             new AmazonKinesisAnalyticsEndpointResolver();
diff --git a/sdk/src/Services/KinesisAnalytics/Properties/AssemblyInfo.cs b/sdk/src/Services/KinesisAnalytics/Properties/AssemblyInfo.cs
index ebd415bac7f3..2b9252251acf 100644
--- a/sdk/src/Services/KinesisAnalytics/Properties/AssemblyInfo.cs
+++ b/sdk/src/Services/KinesisAnalytics/Properties/AssemblyInfo.cs
@@ -41,5 +41,9 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.300.84")]
\ No newline at end of file
+#if BCL
+[assembly: AssemblyVersion("4.0")]
+#else
+[assembly: AssemblyVersion("4.0.0.0")]
+#endif
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/src/Services/KinesisAnalyticsV2/AWSSDK.KinesisAnalyticsV2.NetFramework.csproj b/sdk/src/Services/KinesisAnalyticsV2/AWSSDK.KinesisAnalyticsV2.NetFramework.csproj
index cb5d1677303e..2c24fc65d934 100644
--- a/sdk/src/Services/KinesisAnalyticsV2/AWSSDK.KinesisAnalyticsV2.NetFramework.csproj
+++ b/sdk/src/Services/KinesisAnalyticsV2/AWSSDK.KinesisAnalyticsV2.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);BCL;AWS_ASYNC_API;CODE_ANALYSIS</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(RuleSetFileForBuild)' == 'false' Or '$(RuleSetFileForBuild)' == '' ">
diff --git a/sdk/src/Services/KinesisAnalyticsV2/AWSSDK.KinesisAnalyticsV2.NetStandard.csproj b/sdk/src/Services/KinesisAnalyticsV2/AWSSDK.KinesisAnalyticsV2.NetStandard.csproj
index c930c577a7f3..175898acfe4e 100644
--- a/sdk/src/Services/KinesisAnalyticsV2/AWSSDK.KinesisAnalyticsV2.NetStandard.csproj
+++ b/sdk/src/Services/KinesisAnalyticsV2/AWSSDK.KinesisAnalyticsV2.NetStandard.csproj
@@ -22,6 +22,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <!-- Async Enumerable Compatibility -->
diff --git a/sdk/src/Services/KinesisAnalyticsV2/Generated/AmazonKinesisAnalyticsV2Config.cs b/sdk/src/Services/KinesisAnalyticsV2/Generated/AmazonKinesisAnalyticsV2Config.cs
index f605f847215a..d1ee91bce454 100644
--- a/sdk/src/Services/KinesisAnalyticsV2/Generated/AmazonKinesisAnalyticsV2Config.cs
+++ b/sdk/src/Services/KinesisAnalyticsV2/Generated/AmazonKinesisAnalyticsV2Config.cs
@@ -34,7 +34,7 @@ namespace Amazon.KinesisAnalyticsV2
     public partial class AmazonKinesisAnalyticsV2Config : ClientConfig
     {
         private static readonly string UserAgentString =
-            InternalSDKUtils.BuildUserAgentString("Kinesis Analytics V2", "3.7.302.26");
+            InternalSDKUtils.BuildUserAgentString("Kinesis Analytics V2", "4.0.0.0");
 
         private static readonly AmazonKinesisAnalyticsV2EndpointResolver EndpointResolver =
             new AmazonKinesisAnalyticsV2EndpointResolver();
diff --git a/sdk/src/Services/KinesisAnalyticsV2/Properties/AssemblyInfo.cs b/sdk/src/Services/KinesisAnalyticsV2/Properties/AssemblyInfo.cs
index 9b6314eaa351..f377f4a8c353 100644
--- a/sdk/src/Services/KinesisAnalyticsV2/Properties/AssemblyInfo.cs
+++ b/sdk/src/Services/KinesisAnalyticsV2/Properties/AssemblyInfo.cs
@@ -41,5 +41,9 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.302.26")]
\ No newline at end of file
+#if BCL
+[assembly: AssemblyVersion("4.0")]
+#else
+[assembly: AssemblyVersion("4.0.0.0")]
+#endif
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/src/Services/KinesisFirehose/AWSSDK.KinesisFirehose.NetFramework.csproj b/sdk/src/Services/KinesisFirehose/AWSSDK.KinesisFirehose.NetFramework.csproj
index 8af44dc99177..9db1e6ab02c5 100644
--- a/sdk/src/Services/KinesisFirehose/AWSSDK.KinesisFirehose.NetFramework.csproj
+++ b/sdk/src/Services/KinesisFirehose/AWSSDK.KinesisFirehose.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);BCL;AWS_ASYNC_API;CODE_ANALYSIS</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(RuleSetFileForBuild)' == 'false' Or '$(RuleSetFileForBuild)' == '' ">
diff --git a/sdk/src/Services/KinesisFirehose/AWSSDK.KinesisFirehose.NetStandard.csproj b/sdk/src/Services/KinesisFirehose/AWSSDK.KinesisFirehose.NetStandard.csproj
index b671a3aaa153..16cc6ee35c32 100644
--- a/sdk/src/Services/KinesisFirehose/AWSSDK.KinesisFirehose.NetStandard.csproj
+++ b/sdk/src/Services/KinesisFirehose/AWSSDK.KinesisFirehose.NetStandard.csproj
@@ -22,6 +22,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <!-- Async Enumerable Compatibility -->
diff --git a/sdk/src/Services/KinesisFirehose/Generated/AmazonKinesisFirehoseConfig.cs b/sdk/src/Services/KinesisFirehose/Generated/AmazonKinesisFirehoseConfig.cs
index ad7a1d5ed7f5..c442a9c224e5 100644
--- a/sdk/src/Services/KinesisFirehose/Generated/AmazonKinesisFirehoseConfig.cs
+++ b/sdk/src/Services/KinesisFirehose/Generated/AmazonKinesisFirehoseConfig.cs
@@ -34,7 +34,7 @@ namespace Amazon.KinesisFirehose
     public partial class AmazonKinesisFirehoseConfig : ClientConfig
     {
         private static readonly string UserAgentString =
-            InternalSDKUtils.BuildUserAgentString("Firehose", "3.7.304.32");
+            InternalSDKUtils.BuildUserAgentString("Firehose", "4.0.0.0");
 
         private static readonly AmazonKinesisFirehoseEndpointResolver EndpointResolver =
             new AmazonKinesisFirehoseEndpointResolver();
diff --git a/sdk/src/Services/KinesisFirehose/Properties/AssemblyInfo.cs b/sdk/src/Services/KinesisFirehose/Properties/AssemblyInfo.cs
index 2f570aff1487..59f5dbe0fbc2 100644
--- a/sdk/src/Services/KinesisFirehose/Properties/AssemblyInfo.cs
+++ b/sdk/src/Services/KinesisFirehose/Properties/AssemblyInfo.cs
@@ -41,5 +41,9 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.304.32")]
\ No newline at end of file
+#if BCL
+[assembly: AssemblyVersion("4.0")]
+#else
+[assembly: AssemblyVersion("4.0.0.0")]
+#endif
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/src/Services/KinesisVideo/AWSSDK.KinesisVideo.NetFramework.csproj b/sdk/src/Services/KinesisVideo/AWSSDK.KinesisVideo.NetFramework.csproj
index 417f6adf383a..d55ca3fc86ca 100644
--- a/sdk/src/Services/KinesisVideo/AWSSDK.KinesisVideo.NetFramework.csproj
+++ b/sdk/src/Services/KinesisVideo/AWSSDK.KinesisVideo.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);BCL;AWS_ASYNC_API;CODE_ANALYSIS</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(RuleSetFileForBuild)' == 'false' Or '$(RuleSetFileForBuild)' == '' ">
diff --git a/sdk/src/Services/KinesisVideo/AWSSDK.KinesisVideo.NetStandard.csproj b/sdk/src/Services/KinesisVideo/AWSSDK.KinesisVideo.NetStandard.csproj
index 0cb0db0e3697..2c0803b3e4ff 100644
--- a/sdk/src/Services/KinesisVideo/AWSSDK.KinesisVideo.NetStandard.csproj
+++ b/sdk/src/Services/KinesisVideo/AWSSDK.KinesisVideo.NetStandard.csproj
@@ -22,6 +22,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <!-- Async Enumerable Compatibility -->
diff --git a/sdk/src/Services/KinesisVideo/Generated/AmazonKinesisVideoConfig.cs b/sdk/src/Services/KinesisVideo/Generated/AmazonKinesisVideoConfig.cs
index 725463a7dceb..40f0ab272c86 100644
--- a/sdk/src/Services/KinesisVideo/Generated/AmazonKinesisVideoConfig.cs
+++ b/sdk/src/Services/KinesisVideo/Generated/AmazonKinesisVideoConfig.cs
@@ -34,7 +34,7 @@ namespace Amazon.KinesisVideo
     public partial class AmazonKinesisVideoConfig : ClientConfig
     {
         private static readonly string UserAgentString =
-            InternalSDKUtils.BuildUserAgentString("Kinesis Video", "3.7.301.32");
+            InternalSDKUtils.BuildUserAgentString("Kinesis Video", "4.0.0.0");
 
         private static readonly AmazonKinesisVideoEndpointResolver EndpointResolver =
             new AmazonKinesisVideoEndpointResolver();
diff --git a/sdk/src/Services/KinesisVideo/Properties/AssemblyInfo.cs b/sdk/src/Services/KinesisVideo/Properties/AssemblyInfo.cs
index a60d746fcf7f..478723e3f8c2 100644
--- a/sdk/src/Services/KinesisVideo/Properties/AssemblyInfo.cs
+++ b/sdk/src/Services/KinesisVideo/Properties/AssemblyInfo.cs
@@ -41,5 +41,9 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.301.32")]
\ No newline at end of file
+#if BCL
+[assembly: AssemblyVersion("4.0")]
+#else
+[assembly: AssemblyVersion("4.0.0.0")]
+#endif
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/src/Services/KinesisVideoArchivedMedia/AWSSDK.KinesisVideoArchivedMedia.NetFramework.csproj b/sdk/src/Services/KinesisVideoArchivedMedia/AWSSDK.KinesisVideoArchivedMedia.NetFramework.csproj
index 68ca79df487d..d43c0d88c007 100644
--- a/sdk/src/Services/KinesisVideoArchivedMedia/AWSSDK.KinesisVideoArchivedMedia.NetFramework.csproj
+++ b/sdk/src/Services/KinesisVideoArchivedMedia/AWSSDK.KinesisVideoArchivedMedia.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);BCL;AWS_ASYNC_API;CODE_ANALYSIS</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(RuleSetFileForBuild)' == 'false' Or '$(RuleSetFileForBuild)' == '' ">
diff --git a/sdk/src/Services/KinesisVideoArchivedMedia/AWSSDK.KinesisVideoArchivedMedia.NetStandard.csproj b/sdk/src/Services/KinesisVideoArchivedMedia/AWSSDK.KinesisVideoArchivedMedia.NetStandard.csproj
index c8d4ea402201..f1ac6c0a7086 100644
--- a/sdk/src/Services/KinesisVideoArchivedMedia/AWSSDK.KinesisVideoArchivedMedia.NetStandard.csproj
+++ b/sdk/src/Services/KinesisVideoArchivedMedia/AWSSDK.KinesisVideoArchivedMedia.NetStandard.csproj
@@ -22,6 +22,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <!-- Async Enumerable Compatibility -->
diff --git a/sdk/src/Services/KinesisVideoArchivedMedia/Generated/AmazonKinesisVideoArchivedMediaConfig.cs b/sdk/src/Services/KinesisVideoArchivedMedia/Generated/AmazonKinesisVideoArchivedMediaConfig.cs
index e14adc683d35..d15686170bdd 100644
--- a/sdk/src/Services/KinesisVideoArchivedMedia/Generated/AmazonKinesisVideoArchivedMediaConfig.cs
+++ b/sdk/src/Services/KinesisVideoArchivedMedia/Generated/AmazonKinesisVideoArchivedMediaConfig.cs
@@ -34,7 +34,7 @@ namespace Amazon.KinesisVideoArchivedMedia
     public partial class AmazonKinesisVideoArchivedMediaConfig : ClientConfig
     {
         private static readonly string UserAgentString =
-            InternalSDKUtils.BuildUserAgentString("Kinesis Video Archived Media", "3.7.301.56");
+            InternalSDKUtils.BuildUserAgentString("Kinesis Video Archived Media", "4.0.0.0");
 
         private static readonly AmazonKinesisVideoArchivedMediaEndpointResolver EndpointResolver =
             new AmazonKinesisVideoArchivedMediaEndpointResolver();
diff --git a/sdk/src/Services/KinesisVideoArchivedMedia/Properties/AssemblyInfo.cs b/sdk/src/Services/KinesisVideoArchivedMedia/Properties/AssemblyInfo.cs
index 3af2620bbfdc..cbd552fd46e7 100644
--- a/sdk/src/Services/KinesisVideoArchivedMedia/Properties/AssemblyInfo.cs
+++ b/sdk/src/Services/KinesisVideoArchivedMedia/Properties/AssemblyInfo.cs
@@ -41,5 +41,9 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.301.56")]
\ No newline at end of file
+#if BCL
+[assembly: AssemblyVersion("4.0")]
+#else
+[assembly: AssemblyVersion("4.0.0.0")]
+#endif
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/src/Services/KinesisVideoMedia/AWSSDK.KinesisVideoMedia.NetFramework.csproj b/sdk/src/Services/KinesisVideoMedia/AWSSDK.KinesisVideoMedia.NetFramework.csproj
index f3121181faf9..7f5c0ae479f2 100644
--- a/sdk/src/Services/KinesisVideoMedia/AWSSDK.KinesisVideoMedia.NetFramework.csproj
+++ b/sdk/src/Services/KinesisVideoMedia/AWSSDK.KinesisVideoMedia.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);BCL;AWS_ASYNC_API;CODE_ANALYSIS</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(RuleSetFileForBuild)' == 'false' Or '$(RuleSetFileForBuild)' == '' ">
diff --git a/sdk/src/Services/KinesisVideoMedia/AWSSDK.KinesisVideoMedia.NetStandard.csproj b/sdk/src/Services/KinesisVideoMedia/AWSSDK.KinesisVideoMedia.NetStandard.csproj
index fc514417243e..971d30d641ca 100644
--- a/sdk/src/Services/KinesisVideoMedia/AWSSDK.KinesisVideoMedia.NetStandard.csproj
+++ b/sdk/src/Services/KinesisVideoMedia/AWSSDK.KinesisVideoMedia.NetStandard.csproj
@@ -22,6 +22,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <!-- Async Enumerable Compatibility -->
diff --git a/sdk/src/Services/KinesisVideoMedia/Generated/AmazonKinesisVideoMediaConfig.cs b/sdk/src/Services/KinesisVideoMedia/Generated/AmazonKinesisVideoMediaConfig.cs
index 48069b5038bf..97d453ee7ec9 100644
--- a/sdk/src/Services/KinesisVideoMedia/Generated/AmazonKinesisVideoMediaConfig.cs
+++ b/sdk/src/Services/KinesisVideoMedia/Generated/AmazonKinesisVideoMediaConfig.cs
@@ -34,7 +34,7 @@ namespace Amazon.KinesisVideoMedia
     public partial class AmazonKinesisVideoMediaConfig : ClientConfig
     {
         private static readonly string UserAgentString =
-            InternalSDKUtils.BuildUserAgentString("Kinesis Video Media", "3.7.300.84");
+            InternalSDKUtils.BuildUserAgentString("Kinesis Video Media", "4.0.0.0");
 
         private static readonly AmazonKinesisVideoMediaEndpointResolver EndpointResolver =
             new AmazonKinesisVideoMediaEndpointResolver();
diff --git a/sdk/src/Services/KinesisVideoMedia/Properties/AssemblyInfo.cs b/sdk/src/Services/KinesisVideoMedia/Properties/AssemblyInfo.cs
index 7f18fc7ce451..9767c3c3d3ca 100644
--- a/sdk/src/Services/KinesisVideoMedia/Properties/AssemblyInfo.cs
+++ b/sdk/src/Services/KinesisVideoMedia/Properties/AssemblyInfo.cs
@@ -41,5 +41,9 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.300.84")]
\ No newline at end of file
+#if BCL
+[assembly: AssemblyVersion("4.0")]
+#else
+[assembly: AssemblyVersion("4.0.0.0")]
+#endif
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/src/Services/KinesisVideoSignalingChannels/AWSSDK.KinesisVideoSignalingChannels.NetFramework.csproj b/sdk/src/Services/KinesisVideoSignalingChannels/AWSSDK.KinesisVideoSignalingChannels.NetFramework.csproj
index 85c56f2edd79..5e149efdf578 100644
--- a/sdk/src/Services/KinesisVideoSignalingChannels/AWSSDK.KinesisVideoSignalingChannels.NetFramework.csproj
+++ b/sdk/src/Services/KinesisVideoSignalingChannels/AWSSDK.KinesisVideoSignalingChannels.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);BCL;AWS_ASYNC_API;CODE_ANALYSIS</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(RuleSetFileForBuild)' == 'false' Or '$(RuleSetFileForBuild)' == '' ">
diff --git a/sdk/src/Services/KinesisVideoSignalingChannels/AWSSDK.KinesisVideoSignalingChannels.NetStandard.csproj b/sdk/src/Services/KinesisVideoSignalingChannels/AWSSDK.KinesisVideoSignalingChannels.NetStandard.csproj
index ae9efac41bd5..ab8434782e5d 100644
--- a/sdk/src/Services/KinesisVideoSignalingChannels/AWSSDK.KinesisVideoSignalingChannels.NetStandard.csproj
+++ b/sdk/src/Services/KinesisVideoSignalingChannels/AWSSDK.KinesisVideoSignalingChannels.NetStandard.csproj
@@ -22,6 +22,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <!-- Async Enumerable Compatibility -->
diff --git a/sdk/src/Services/KinesisVideoSignalingChannels/Generated/AmazonKinesisVideoSignalingChannelsConfig.cs b/sdk/src/Services/KinesisVideoSignalingChannels/Generated/AmazonKinesisVideoSignalingChannelsConfig.cs
index 959b862f2af3..45bd7683763b 100644
--- a/sdk/src/Services/KinesisVideoSignalingChannels/Generated/AmazonKinesisVideoSignalingChannelsConfig.cs
+++ b/sdk/src/Services/KinesisVideoSignalingChannels/Generated/AmazonKinesisVideoSignalingChannelsConfig.cs
@@ -34,7 +34,7 @@ namespace Amazon.KinesisVideoSignalingChannels
     public partial class AmazonKinesisVideoSignalingChannelsConfig : ClientConfig
     {
         private static readonly string UserAgentString =
-            InternalSDKUtils.BuildUserAgentString("Kinesis Video Signaling", "3.7.300.84");
+            InternalSDKUtils.BuildUserAgentString("Kinesis Video Signaling", "4.0.0.0");
 
         private static readonly AmazonKinesisVideoSignalingChannelsEndpointResolver EndpointResolver =
             new AmazonKinesisVideoSignalingChannelsEndpointResolver();
diff --git a/sdk/src/Services/KinesisVideoSignalingChannels/Properties/AssemblyInfo.cs b/sdk/src/Services/KinesisVideoSignalingChannels/Properties/AssemblyInfo.cs
index d3a830dd661b..e57c54852d58 100644
--- a/sdk/src/Services/KinesisVideoSignalingChannels/Properties/AssemblyInfo.cs
+++ b/sdk/src/Services/KinesisVideoSignalingChannels/Properties/AssemblyInfo.cs
@@ -41,5 +41,9 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.300.84")]
\ No newline at end of file
+#if BCL
+[assembly: AssemblyVersion("4.0")]
+#else
+[assembly: AssemblyVersion("4.0.0.0")]
+#endif
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/src/Services/KinesisVideoWebRTCStorage/AWSSDK.KinesisVideoWebRTCStorage.NetFramework.csproj b/sdk/src/Services/KinesisVideoWebRTCStorage/AWSSDK.KinesisVideoWebRTCStorage.NetFramework.csproj
index 3c89591b6968..9492a526b1df 100644
--- a/sdk/src/Services/KinesisVideoWebRTCStorage/AWSSDK.KinesisVideoWebRTCStorage.NetFramework.csproj
+++ b/sdk/src/Services/KinesisVideoWebRTCStorage/AWSSDK.KinesisVideoWebRTCStorage.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);BCL;AWS_ASYNC_API;CODE_ANALYSIS</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(RuleSetFileForBuild)' == 'false' Or '$(RuleSetFileForBuild)' == '' ">
diff --git a/sdk/src/Services/KinesisVideoWebRTCStorage/AWSSDK.KinesisVideoWebRTCStorage.NetStandard.csproj b/sdk/src/Services/KinesisVideoWebRTCStorage/AWSSDK.KinesisVideoWebRTCStorage.NetStandard.csproj
index d1d6f2e37845..a0c2425b3f29 100644
--- a/sdk/src/Services/KinesisVideoWebRTCStorage/AWSSDK.KinesisVideoWebRTCStorage.NetStandard.csproj
+++ b/sdk/src/Services/KinesisVideoWebRTCStorage/AWSSDK.KinesisVideoWebRTCStorage.NetStandard.csproj
@@ -22,6 +22,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <!-- Async Enumerable Compatibility -->
diff --git a/sdk/src/Services/KinesisVideoWebRTCStorage/Generated/AmazonKinesisVideoWebRTCStorageConfig.cs b/sdk/src/Services/KinesisVideoWebRTCStorage/Generated/AmazonKinesisVideoWebRTCStorageConfig.cs
index 47fc3d08c0e9..3f995ec32863 100644
--- a/sdk/src/Services/KinesisVideoWebRTCStorage/Generated/AmazonKinesisVideoWebRTCStorageConfig.cs
+++ b/sdk/src/Services/KinesisVideoWebRTCStorage/Generated/AmazonKinesisVideoWebRTCStorageConfig.cs
@@ -34,7 +34,7 @@ namespace Amazon.KinesisVideoWebRTCStorage
     public partial class AmazonKinesisVideoWebRTCStorageConfig : ClientConfig
     {
         private static readonly string UserAgentString =
-            InternalSDKUtils.BuildUserAgentString("Kinesis Video WebRTC Storage", "3.7.300.84");
+            InternalSDKUtils.BuildUserAgentString("Kinesis Video WebRTC Storage", "4.0.0.0");
 
         private static readonly AmazonKinesisVideoWebRTCStorageEndpointResolver EndpointResolver =
             new AmazonKinesisVideoWebRTCStorageEndpointResolver();
diff --git a/sdk/src/Services/KinesisVideoWebRTCStorage/Properties/AssemblyInfo.cs b/sdk/src/Services/KinesisVideoWebRTCStorage/Properties/AssemblyInfo.cs
index cca55dda2747..f2722670932f 100644
--- a/sdk/src/Services/KinesisVideoWebRTCStorage/Properties/AssemblyInfo.cs
+++ b/sdk/src/Services/KinesisVideoWebRTCStorage/Properties/AssemblyInfo.cs
@@ -41,5 +41,9 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.300.84")]
\ No newline at end of file
+#if BCL
+[assembly: AssemblyVersion("4.0")]
+#else
+[assembly: AssemblyVersion("4.0.0.0")]
+#endif
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/src/Services/LakeFormation/AWSSDK.LakeFormation.NetFramework.csproj b/sdk/src/Services/LakeFormation/AWSSDK.LakeFormation.NetFramework.csproj
index f0d2296c7bee..e90ee558c146 100644
--- a/sdk/src/Services/LakeFormation/AWSSDK.LakeFormation.NetFramework.csproj
+++ b/sdk/src/Services/LakeFormation/AWSSDK.LakeFormation.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);BCL;AWS_ASYNC_API;CODE_ANALYSIS</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(RuleSetFileForBuild)' == 'false' Or '$(RuleSetFileForBuild)' == '' ">
diff --git a/sdk/src/Services/LakeFormation/AWSSDK.LakeFormation.NetStandard.csproj b/sdk/src/Services/LakeFormation/AWSSDK.LakeFormation.NetStandard.csproj
index d3c71513f6e5..cff791dd077b 100644
--- a/sdk/src/Services/LakeFormation/AWSSDK.LakeFormation.NetStandard.csproj
+++ b/sdk/src/Services/LakeFormation/AWSSDK.LakeFormation.NetStandard.csproj
@@ -22,6 +22,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <!-- Async Enumerable Compatibility -->
diff --git a/sdk/src/Services/LakeFormation/Generated/AmazonLakeFormationConfig.cs b/sdk/src/Services/LakeFormation/Generated/AmazonLakeFormationConfig.cs
index a95f9921980c..9ccc396dde30 100644
--- a/sdk/src/Services/LakeFormation/Generated/AmazonLakeFormationConfig.cs
+++ b/sdk/src/Services/LakeFormation/Generated/AmazonLakeFormationConfig.cs
@@ -34,7 +34,7 @@ namespace Amazon.LakeFormation
     public partial class AmazonLakeFormationConfig : ClientConfig
     {
         private static readonly string UserAgentString =
-            InternalSDKUtils.BuildUserAgentString("LakeFormation", "3.7.303.9");
+            InternalSDKUtils.BuildUserAgentString("LakeFormation", "4.0.0.0");
 
         private static readonly AmazonLakeFormationEndpointResolver EndpointResolver =
             new AmazonLakeFormationEndpointResolver();
diff --git a/sdk/src/Services/LakeFormation/Properties/AssemblyInfo.cs b/sdk/src/Services/LakeFormation/Properties/AssemblyInfo.cs
index 9823ddb00529..8a911fa93a68 100644
--- a/sdk/src/Services/LakeFormation/Properties/AssemblyInfo.cs
+++ b/sdk/src/Services/LakeFormation/Properties/AssemblyInfo.cs
@@ -41,5 +41,9 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.303.9")]
\ No newline at end of file
+#if BCL
+[assembly: AssemblyVersion("4.0")]
+#else
+[assembly: AssemblyVersion("4.0.0.0")]
+#endif
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/src/Services/Lambda/AWSSDK.Lambda.NetFramework.csproj b/sdk/src/Services/Lambda/AWSSDK.Lambda.NetFramework.csproj
index 12b6e74f50ba..36eae952802e 100644
--- a/sdk/src/Services/Lambda/AWSSDK.Lambda.NetFramework.csproj
+++ b/sdk/src/Services/Lambda/AWSSDK.Lambda.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);BCL;AWS_ASYNC_API;CODE_ANALYSIS</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(RuleSetFileForBuild)' == 'false' Or '$(RuleSetFileForBuild)' == '' ">
diff --git a/sdk/src/Services/Lambda/AWSSDK.Lambda.NetStandard.csproj b/sdk/src/Services/Lambda/AWSSDK.Lambda.NetStandard.csproj
index 7822eb22a964..745b9be7b1dd 100644
--- a/sdk/src/Services/Lambda/AWSSDK.Lambda.NetStandard.csproj
+++ b/sdk/src/Services/Lambda/AWSSDK.Lambda.NetStandard.csproj
@@ -22,6 +22,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <!-- Async Enumerable Compatibility -->
diff --git a/sdk/src/Services/Lambda/Generated/AmazonLambdaConfig.cs b/sdk/src/Services/Lambda/Generated/AmazonLambdaConfig.cs
index ddce6fcb8435..3bc0c3b80fbb 100644
--- a/sdk/src/Services/Lambda/Generated/AmazonLambdaConfig.cs
+++ b/sdk/src/Services/Lambda/Generated/AmazonLambdaConfig.cs
@@ -34,7 +34,7 @@ namespace Amazon.Lambda
     public partial class AmazonLambdaConfig : ClientConfig
     {
         private static readonly string UserAgentString =
-            InternalSDKUtils.BuildUserAgentString("Lambda", "3.7.305.16");
+            InternalSDKUtils.BuildUserAgentString("Lambda", "4.0.0.0");
 
         private static readonly AmazonLambdaEndpointResolver EndpointResolver =
             new AmazonLambdaEndpointResolver();
diff --git a/sdk/src/Services/Lambda/Properties/AssemblyInfo.cs b/sdk/src/Services/Lambda/Properties/AssemblyInfo.cs
index 598dcba0aa9a..70895a99bd2b 100644
--- a/sdk/src/Services/Lambda/Properties/AssemblyInfo.cs
+++ b/sdk/src/Services/Lambda/Properties/AssemblyInfo.cs
@@ -41,5 +41,9 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.305.16")]
\ No newline at end of file
+#if BCL
+[assembly: AssemblyVersion("4.0")]
+#else
+[assembly: AssemblyVersion("4.0.0.0")]
+#endif
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/src/Services/LaunchWizard/AWSSDK.LaunchWizard.NetFramework.csproj b/sdk/src/Services/LaunchWizard/AWSSDK.LaunchWizard.NetFramework.csproj
index d69031c18608..7efb8148371b 100644
--- a/sdk/src/Services/LaunchWizard/AWSSDK.LaunchWizard.NetFramework.csproj
+++ b/sdk/src/Services/LaunchWizard/AWSSDK.LaunchWizard.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);BCL;AWS_ASYNC_API;CODE_ANALYSIS</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(RuleSetFileForBuild)' == 'false' Or '$(RuleSetFileForBuild)' == '' ">
diff --git a/sdk/src/Services/LaunchWizard/AWSSDK.LaunchWizard.NetStandard.csproj b/sdk/src/Services/LaunchWizard/AWSSDK.LaunchWizard.NetStandard.csproj
index bf929a988514..0163f53c4a7e 100644
--- a/sdk/src/Services/LaunchWizard/AWSSDK.LaunchWizard.NetStandard.csproj
+++ b/sdk/src/Services/LaunchWizard/AWSSDK.LaunchWizard.NetStandard.csproj
@@ -22,6 +22,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <!-- Async Enumerable Compatibility -->
diff --git a/sdk/src/Services/LaunchWizard/Generated/AmazonLaunchWizardConfig.cs b/sdk/src/Services/LaunchWizard/Generated/AmazonLaunchWizardConfig.cs
index 3bf40fc1ae01..f17c646a1582 100644
--- a/sdk/src/Services/LaunchWizard/Generated/AmazonLaunchWizardConfig.cs
+++ b/sdk/src/Services/LaunchWizard/Generated/AmazonLaunchWizardConfig.cs
@@ -34,7 +34,7 @@ namespace Amazon.LaunchWizard
     public partial class AmazonLaunchWizardConfig : ClientConfig
     {
         private static readonly string UserAgentString =
-            InternalSDKUtils.BuildUserAgentString("Launch Wizard", "3.7.300.84");
+            InternalSDKUtils.BuildUserAgentString("Launch Wizard", "4.0.0.0");
 
         private static readonly AmazonLaunchWizardEndpointResolver EndpointResolver =
             new AmazonLaunchWizardEndpointResolver();
diff --git a/sdk/src/Services/LaunchWizard/Properties/AssemblyInfo.cs b/sdk/src/Services/LaunchWizard/Properties/AssemblyInfo.cs
index e3abd36b7abc..2c89c2818242 100644
--- a/sdk/src/Services/LaunchWizard/Properties/AssemblyInfo.cs
+++ b/sdk/src/Services/LaunchWizard/Properties/AssemblyInfo.cs
@@ -41,5 +41,9 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.300.84")]
\ No newline at end of file
+#if BCL
+[assembly: AssemblyVersion("4.0")]
+#else
+[assembly: AssemblyVersion("4.0.0.0")]
+#endif
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/src/Services/Lex/AWSSDK.Lex.NetFramework.csproj b/sdk/src/Services/Lex/AWSSDK.Lex.NetFramework.csproj
index 8b796a50c414..c34342743662 100644
--- a/sdk/src/Services/Lex/AWSSDK.Lex.NetFramework.csproj
+++ b/sdk/src/Services/Lex/AWSSDK.Lex.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);BCL;AWS_ASYNC_API;CODE_ANALYSIS</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(RuleSetFileForBuild)' == 'false' Or '$(RuleSetFileForBuild)' == '' ">
diff --git a/sdk/src/Services/Lex/AWSSDK.Lex.NetStandard.csproj b/sdk/src/Services/Lex/AWSSDK.Lex.NetStandard.csproj
index d939ef9c94f5..c4639c1b6ea2 100644
--- a/sdk/src/Services/Lex/AWSSDK.Lex.NetStandard.csproj
+++ b/sdk/src/Services/Lex/AWSSDK.Lex.NetStandard.csproj
@@ -22,6 +22,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <!-- Async Enumerable Compatibility -->
diff --git a/sdk/src/Services/Lex/Generated/AmazonLexConfig.cs b/sdk/src/Services/Lex/Generated/AmazonLexConfig.cs
index e7cdc4a2f9c6..13965547b951 100644
--- a/sdk/src/Services/Lex/Generated/AmazonLexConfig.cs
+++ b/sdk/src/Services/Lex/Generated/AmazonLexConfig.cs
@@ -34,7 +34,7 @@ namespace Amazon.Lex
     public partial class AmazonLexConfig : ClientConfig
     {
         private static readonly string UserAgentString =
-            InternalSDKUtils.BuildUserAgentString("Lex Runtime Service", "3.7.300.84");
+            InternalSDKUtils.BuildUserAgentString("Lex Runtime Service", "4.0.0.0");
 
         private static readonly AmazonLexEndpointResolver EndpointResolver =
             new AmazonLexEndpointResolver();
diff --git a/sdk/src/Services/Lex/Properties/AssemblyInfo.cs b/sdk/src/Services/Lex/Properties/AssemblyInfo.cs
index e825db8d321d..ea68266da6f8 100644
--- a/sdk/src/Services/Lex/Properties/AssemblyInfo.cs
+++ b/sdk/src/Services/Lex/Properties/AssemblyInfo.cs
@@ -41,5 +41,9 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.300.84")]
\ No newline at end of file
+#if BCL
+[assembly: AssemblyVersion("4.0")]
+#else
+[assembly: AssemblyVersion("4.0.0.0")]
+#endif
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/src/Services/LexModelBuildingService/AWSSDK.LexModelBuildingService.NetFramework.csproj b/sdk/src/Services/LexModelBuildingService/AWSSDK.LexModelBuildingService.NetFramework.csproj
index 995d3112dd08..09bac2d7d87a 100644
--- a/sdk/src/Services/LexModelBuildingService/AWSSDK.LexModelBuildingService.NetFramework.csproj
+++ b/sdk/src/Services/LexModelBuildingService/AWSSDK.LexModelBuildingService.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);BCL;AWS_ASYNC_API;CODE_ANALYSIS</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(RuleSetFileForBuild)' == 'false' Or '$(RuleSetFileForBuild)' == '' ">
diff --git a/sdk/src/Services/LexModelBuildingService/AWSSDK.LexModelBuildingService.NetStandard.csproj b/sdk/src/Services/LexModelBuildingService/AWSSDK.LexModelBuildingService.NetStandard.csproj
index c09556d1aa7e..636d0346d955 100644
--- a/sdk/src/Services/LexModelBuildingService/AWSSDK.LexModelBuildingService.NetStandard.csproj
+++ b/sdk/src/Services/LexModelBuildingService/AWSSDK.LexModelBuildingService.NetStandard.csproj
@@ -22,6 +22,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <!-- Async Enumerable Compatibility -->
diff --git a/sdk/src/Services/LexModelBuildingService/Generated/AmazonLexModelBuildingServiceConfig.cs b/sdk/src/Services/LexModelBuildingService/Generated/AmazonLexModelBuildingServiceConfig.cs
index 2954c7df79c4..26e3a5180f5f 100644
--- a/sdk/src/Services/LexModelBuildingService/Generated/AmazonLexModelBuildingServiceConfig.cs
+++ b/sdk/src/Services/LexModelBuildingService/Generated/AmazonLexModelBuildingServiceConfig.cs
@@ -34,7 +34,7 @@ namespace Amazon.LexModelBuildingService
     public partial class AmazonLexModelBuildingServiceConfig : ClientConfig
     {
         private static readonly string UserAgentString =
-            InternalSDKUtils.BuildUserAgentString("Lex Model Building Service", "3.7.300.84");
+            InternalSDKUtils.BuildUserAgentString("Lex Model Building Service", "4.0.0.0");
 
         private static readonly AmazonLexModelBuildingServiceEndpointResolver EndpointResolver =
             new AmazonLexModelBuildingServiceEndpointResolver();
diff --git a/sdk/src/Services/LexModelBuildingService/Properties/AssemblyInfo.cs b/sdk/src/Services/LexModelBuildingService/Properties/AssemblyInfo.cs
index 2dee7a969e9a..0f958e879e18 100644
--- a/sdk/src/Services/LexModelBuildingService/Properties/AssemblyInfo.cs
+++ b/sdk/src/Services/LexModelBuildingService/Properties/AssemblyInfo.cs
@@ -41,5 +41,9 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.300.84")]
\ No newline at end of file
+#if BCL
+[assembly: AssemblyVersion("4.0")]
+#else
+[assembly: AssemblyVersion("4.0.0.0")]
+#endif
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/src/Services/LexModelsV2/AWSSDK.LexModelsV2.NetFramework.csproj b/sdk/src/Services/LexModelsV2/AWSSDK.LexModelsV2.NetFramework.csproj
index 5439312fc976..528be4efd969 100644
--- a/sdk/src/Services/LexModelsV2/AWSSDK.LexModelsV2.NetFramework.csproj
+++ b/sdk/src/Services/LexModelsV2/AWSSDK.LexModelsV2.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);BCL;AWS_ASYNC_API;CODE_ANALYSIS</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(RuleSetFileForBuild)' == 'false' Or '$(RuleSetFileForBuild)' == '' ">
diff --git a/sdk/src/Services/LexModelsV2/AWSSDK.LexModelsV2.NetStandard.csproj b/sdk/src/Services/LexModelsV2/AWSSDK.LexModelsV2.NetStandard.csproj
index c5d730d0e10f..aa8d70e912ba 100644
--- a/sdk/src/Services/LexModelsV2/AWSSDK.LexModelsV2.NetStandard.csproj
+++ b/sdk/src/Services/LexModelsV2/AWSSDK.LexModelsV2.NetStandard.csproj
@@ -22,6 +22,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <!-- Async Enumerable Compatibility -->
diff --git a/sdk/src/Services/LexModelsV2/Generated/AmazonLexModelsV2Config.cs b/sdk/src/Services/LexModelsV2/Generated/AmazonLexModelsV2Config.cs
index 706431fceabe..06f4d9d289d6 100644
--- a/sdk/src/Services/LexModelsV2/Generated/AmazonLexModelsV2Config.cs
+++ b/sdk/src/Services/LexModelsV2/Generated/AmazonLexModelsV2Config.cs
@@ -34,7 +34,7 @@ namespace Amazon.LexModelsV2
     public partial class AmazonLexModelsV2Config : ClientConfig
     {
         private static readonly string UserAgentString =
-            InternalSDKUtils.BuildUserAgentString("Lex Models V2", "3.7.303.30");
+            InternalSDKUtils.BuildUserAgentString("Lex Models V2", "4.0.0.0");
 
         private static readonly AmazonLexModelsV2EndpointResolver EndpointResolver =
             new AmazonLexModelsV2EndpointResolver();
diff --git a/sdk/src/Services/LexModelsV2/Properties/AssemblyInfo.cs b/sdk/src/Services/LexModelsV2/Properties/AssemblyInfo.cs
index 6530bbbea860..747d6769258c 100644
--- a/sdk/src/Services/LexModelsV2/Properties/AssemblyInfo.cs
+++ b/sdk/src/Services/LexModelsV2/Properties/AssemblyInfo.cs
@@ -41,5 +41,9 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.303.30")]
\ No newline at end of file
+#if BCL
+[assembly: AssemblyVersion("4.0")]
+#else
+[assembly: AssemblyVersion("4.0.0.0")]
+#endif
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/src/Services/LexRuntimeV2/AWSSDK.LexRuntimeV2.NetFramework.csproj b/sdk/src/Services/LexRuntimeV2/AWSSDK.LexRuntimeV2.NetFramework.csproj
index f7e09cfc8585..5e85aa117168 100644
--- a/sdk/src/Services/LexRuntimeV2/AWSSDK.LexRuntimeV2.NetFramework.csproj
+++ b/sdk/src/Services/LexRuntimeV2/AWSSDK.LexRuntimeV2.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);BCL;AWS_ASYNC_API;CODE_ANALYSIS</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(RuleSetFileForBuild)' == 'false' Or '$(RuleSetFileForBuild)' == '' ">
diff --git a/sdk/src/Services/LexRuntimeV2/AWSSDK.LexRuntimeV2.NetStandard.csproj b/sdk/src/Services/LexRuntimeV2/AWSSDK.LexRuntimeV2.NetStandard.csproj
index 3d59659b1228..fb8e17d13733 100644
--- a/sdk/src/Services/LexRuntimeV2/AWSSDK.LexRuntimeV2.NetStandard.csproj
+++ b/sdk/src/Services/LexRuntimeV2/AWSSDK.LexRuntimeV2.NetStandard.csproj
@@ -22,6 +22,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <!-- Async Enumerable Compatibility -->
diff --git a/sdk/src/Services/LexRuntimeV2/Generated/AmazonLexRuntimeV2Config.cs b/sdk/src/Services/LexRuntimeV2/Generated/AmazonLexRuntimeV2Config.cs
index 1d153b991dd9..e3ff3a6b94b8 100644
--- a/sdk/src/Services/LexRuntimeV2/Generated/AmazonLexRuntimeV2Config.cs
+++ b/sdk/src/Services/LexRuntimeV2/Generated/AmazonLexRuntimeV2Config.cs
@@ -34,7 +34,7 @@ namespace Amazon.LexRuntimeV2
     public partial class AmazonLexRuntimeV2Config : ClientConfig
     {
         private static readonly string UserAgentString =
-            InternalSDKUtils.BuildUserAgentString("Lex Runtime V2", "3.7.301.76");
+            InternalSDKUtils.BuildUserAgentString("Lex Runtime V2", "4.0.0.0");
 
         private static readonly AmazonLexRuntimeV2EndpointResolver EndpointResolver =
             new AmazonLexRuntimeV2EndpointResolver();
diff --git a/sdk/src/Services/LexRuntimeV2/Properties/AssemblyInfo.cs b/sdk/src/Services/LexRuntimeV2/Properties/AssemblyInfo.cs
index 4fd0b6d7094f..f9e77f21eaa6 100644
--- a/sdk/src/Services/LexRuntimeV2/Properties/AssemblyInfo.cs
+++ b/sdk/src/Services/LexRuntimeV2/Properties/AssemblyInfo.cs
@@ -41,5 +41,9 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.301.76")]
\ No newline at end of file
+#if BCL
+[assembly: AssemblyVersion("4.0")]
+#else
+[assembly: AssemblyVersion("4.0.0.0")]
+#endif
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/src/Services/LicenseManager/AWSSDK.LicenseManager.NetFramework.csproj b/sdk/src/Services/LicenseManager/AWSSDK.LicenseManager.NetFramework.csproj
index c85da0a818e7..a0ed503e05cc 100644
--- a/sdk/src/Services/LicenseManager/AWSSDK.LicenseManager.NetFramework.csproj
+++ b/sdk/src/Services/LicenseManager/AWSSDK.LicenseManager.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);BCL;AWS_ASYNC_API;CODE_ANALYSIS</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(RuleSetFileForBuild)' == 'false' Or '$(RuleSetFileForBuild)' == '' ">
diff --git a/sdk/src/Services/LicenseManager/AWSSDK.LicenseManager.NetStandard.csproj b/sdk/src/Services/LicenseManager/AWSSDK.LicenseManager.NetStandard.csproj
index f0687477ffc7..fafd2e52045b 100644
--- a/sdk/src/Services/LicenseManager/AWSSDK.LicenseManager.NetStandard.csproj
+++ b/sdk/src/Services/LicenseManager/AWSSDK.LicenseManager.NetStandard.csproj
@@ -22,6 +22,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <!-- Async Enumerable Compatibility -->
diff --git a/sdk/src/Services/LicenseManager/Generated/AmazonLicenseManagerConfig.cs b/sdk/src/Services/LicenseManager/Generated/AmazonLicenseManagerConfig.cs
index a419fc62a730..d5a8fd8b21db 100644
--- a/sdk/src/Services/LicenseManager/Generated/AmazonLicenseManagerConfig.cs
+++ b/sdk/src/Services/LicenseManager/Generated/AmazonLicenseManagerConfig.cs
@@ -34,7 +34,7 @@ namespace Amazon.LicenseManager
     public partial class AmazonLicenseManagerConfig : ClientConfig
     {
         private static readonly string UserAgentString =
-            InternalSDKUtils.BuildUserAgentString("License Manager", "3.7.300.84");
+            InternalSDKUtils.BuildUserAgentString("License Manager", "4.0.0.0");
 
         private static readonly AmazonLicenseManagerEndpointResolver EndpointResolver =
             new AmazonLicenseManagerEndpointResolver();
diff --git a/sdk/src/Services/LicenseManager/Properties/AssemblyInfo.cs b/sdk/src/Services/LicenseManager/Properties/AssemblyInfo.cs
index dd687013bb17..8617664b7e8f 100644
--- a/sdk/src/Services/LicenseManager/Properties/AssemblyInfo.cs
+++ b/sdk/src/Services/LicenseManager/Properties/AssemblyInfo.cs
@@ -41,5 +41,9 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.300.84")]
\ No newline at end of file
+#if BCL
+[assembly: AssemblyVersion("4.0")]
+#else
+[assembly: AssemblyVersion("4.0.0.0")]
+#endif
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/src/Services/LicenseManagerLinuxSubscriptions/AWSSDK.LicenseManagerLinuxSubscriptions.NetFramework.csproj b/sdk/src/Services/LicenseManagerLinuxSubscriptions/AWSSDK.LicenseManagerLinuxSubscriptions.NetFramework.csproj
index bfae931741b7..6284aa5783d5 100644
--- a/sdk/src/Services/LicenseManagerLinuxSubscriptions/AWSSDK.LicenseManagerLinuxSubscriptions.NetFramework.csproj
+++ b/sdk/src/Services/LicenseManagerLinuxSubscriptions/AWSSDK.LicenseManagerLinuxSubscriptions.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);BCL;AWS_ASYNC_API;CODE_ANALYSIS</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(RuleSetFileForBuild)' == 'false' Or '$(RuleSetFileForBuild)' == '' ">
diff --git a/sdk/src/Services/LicenseManagerLinuxSubscriptions/AWSSDK.LicenseManagerLinuxSubscriptions.NetStandard.csproj b/sdk/src/Services/LicenseManagerLinuxSubscriptions/AWSSDK.LicenseManagerLinuxSubscriptions.NetStandard.csproj
index 0ff669e1f662..2b838658c774 100644
--- a/sdk/src/Services/LicenseManagerLinuxSubscriptions/AWSSDK.LicenseManagerLinuxSubscriptions.NetStandard.csproj
+++ b/sdk/src/Services/LicenseManagerLinuxSubscriptions/AWSSDK.LicenseManagerLinuxSubscriptions.NetStandard.csproj
@@ -22,6 +22,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <!-- Async Enumerable Compatibility -->
diff --git a/sdk/src/Services/LicenseManagerLinuxSubscriptions/Generated/AmazonLicenseManagerLinuxSubscriptionsConfig.cs b/sdk/src/Services/LicenseManagerLinuxSubscriptions/Generated/AmazonLicenseManagerLinuxSubscriptionsConfig.cs
index 653ca689c5e2..c625043d4a84 100644
--- a/sdk/src/Services/LicenseManagerLinuxSubscriptions/Generated/AmazonLicenseManagerLinuxSubscriptionsConfig.cs
+++ b/sdk/src/Services/LicenseManagerLinuxSubscriptions/Generated/AmazonLicenseManagerLinuxSubscriptionsConfig.cs
@@ -34,7 +34,7 @@ namespace Amazon.LicenseManagerLinuxSubscriptions
     public partial class AmazonLicenseManagerLinuxSubscriptionsConfig : ClientConfig
     {
         private static readonly string UserAgentString =
-            InternalSDKUtils.BuildUserAgentString("License Manager Linux Subscriptions", "3.7.300.84");
+            InternalSDKUtils.BuildUserAgentString("License Manager Linux Subscriptions", "4.0.0.0");
 
         private static readonly AmazonLicenseManagerLinuxSubscriptionsEndpointResolver EndpointResolver =
             new AmazonLicenseManagerLinuxSubscriptionsEndpointResolver();
diff --git a/sdk/src/Services/LicenseManagerLinuxSubscriptions/Properties/AssemblyInfo.cs b/sdk/src/Services/LicenseManagerLinuxSubscriptions/Properties/AssemblyInfo.cs
index 52fc8e760d1e..1bfb949fda57 100644
--- a/sdk/src/Services/LicenseManagerLinuxSubscriptions/Properties/AssemblyInfo.cs
+++ b/sdk/src/Services/LicenseManagerLinuxSubscriptions/Properties/AssemblyInfo.cs
@@ -41,5 +41,9 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.300.84")]
\ No newline at end of file
+#if BCL
+[assembly: AssemblyVersion("4.0")]
+#else
+[assembly: AssemblyVersion("4.0.0.0")]
+#endif
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/src/Services/LicenseManagerUserSubscriptions/AWSSDK.LicenseManagerUserSubscriptions.NetFramework.csproj b/sdk/src/Services/LicenseManagerUserSubscriptions/AWSSDK.LicenseManagerUserSubscriptions.NetFramework.csproj
index 70ee6a139be7..ce68a38d3e09 100644
--- a/sdk/src/Services/LicenseManagerUserSubscriptions/AWSSDK.LicenseManagerUserSubscriptions.NetFramework.csproj
+++ b/sdk/src/Services/LicenseManagerUserSubscriptions/AWSSDK.LicenseManagerUserSubscriptions.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);BCL;AWS_ASYNC_API;CODE_ANALYSIS</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(RuleSetFileForBuild)' == 'false' Or '$(RuleSetFileForBuild)' == '' ">
diff --git a/sdk/src/Services/LicenseManagerUserSubscriptions/AWSSDK.LicenseManagerUserSubscriptions.NetStandard.csproj b/sdk/src/Services/LicenseManagerUserSubscriptions/AWSSDK.LicenseManagerUserSubscriptions.NetStandard.csproj
index ccbc359f4f82..5f40c74a9c77 100644
--- a/sdk/src/Services/LicenseManagerUserSubscriptions/AWSSDK.LicenseManagerUserSubscriptions.NetStandard.csproj
+++ b/sdk/src/Services/LicenseManagerUserSubscriptions/AWSSDK.LicenseManagerUserSubscriptions.NetStandard.csproj
@@ -22,6 +22,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <!-- Async Enumerable Compatibility -->
diff --git a/sdk/src/Services/LicenseManagerUserSubscriptions/Generated/AmazonLicenseManagerUserSubscriptionsConfig.cs b/sdk/src/Services/LicenseManagerUserSubscriptions/Generated/AmazonLicenseManagerUserSubscriptionsConfig.cs
index 935977971c8b..6899df0f4087 100644
--- a/sdk/src/Services/LicenseManagerUserSubscriptions/Generated/AmazonLicenseManagerUserSubscriptionsConfig.cs
+++ b/sdk/src/Services/LicenseManagerUserSubscriptions/Generated/AmazonLicenseManagerUserSubscriptionsConfig.cs
@@ -34,7 +34,7 @@ namespace Amazon.LicenseManagerUserSubscriptions
     public partial class AmazonLicenseManagerUserSubscriptionsConfig : ClientConfig
     {
         private static readonly string UserAgentString =
-            InternalSDKUtils.BuildUserAgentString("License Manager User Subscriptions", "3.7.300.84");
+            InternalSDKUtils.BuildUserAgentString("License Manager User Subscriptions", "4.0.0.0");
 
         private static readonly AmazonLicenseManagerUserSubscriptionsEndpointResolver EndpointResolver =
             new AmazonLicenseManagerUserSubscriptionsEndpointResolver();
diff --git a/sdk/src/Services/LicenseManagerUserSubscriptions/Properties/AssemblyInfo.cs b/sdk/src/Services/LicenseManagerUserSubscriptions/Properties/AssemblyInfo.cs
index a4ccbcc04e4d..c32c84fa63ee 100644
--- a/sdk/src/Services/LicenseManagerUserSubscriptions/Properties/AssemblyInfo.cs
+++ b/sdk/src/Services/LicenseManagerUserSubscriptions/Properties/AssemblyInfo.cs
@@ -41,5 +41,9 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.300.84")]
\ No newline at end of file
+#if BCL
+[assembly: AssemblyVersion("4.0")]
+#else
+[assembly: AssemblyVersion("4.0.0.0")]
+#endif
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/src/Services/Lightsail/AWSSDK.Lightsail.NetFramework.csproj b/sdk/src/Services/Lightsail/AWSSDK.Lightsail.NetFramework.csproj
index 5deabf1287ab..5f1d89008c15 100644
--- a/sdk/src/Services/Lightsail/AWSSDK.Lightsail.NetFramework.csproj
+++ b/sdk/src/Services/Lightsail/AWSSDK.Lightsail.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);BCL;AWS_ASYNC_API;CODE_ANALYSIS</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(RuleSetFileForBuild)' == 'false' Or '$(RuleSetFileForBuild)' == '' ">
diff --git a/sdk/src/Services/Lightsail/AWSSDK.Lightsail.NetStandard.csproj b/sdk/src/Services/Lightsail/AWSSDK.Lightsail.NetStandard.csproj
index b7e3509da35f..0a4caa136e6b 100644
--- a/sdk/src/Services/Lightsail/AWSSDK.Lightsail.NetStandard.csproj
+++ b/sdk/src/Services/Lightsail/AWSSDK.Lightsail.NetStandard.csproj
@@ -22,6 +22,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <!-- Async Enumerable Compatibility -->
diff --git a/sdk/src/Services/Lightsail/Generated/AmazonLightsailConfig.cs b/sdk/src/Services/Lightsail/Generated/AmazonLightsailConfig.cs
index ad6d9cdd5329..be39d157b4a4 100644
--- a/sdk/src/Services/Lightsail/Generated/AmazonLightsailConfig.cs
+++ b/sdk/src/Services/Lightsail/Generated/AmazonLightsailConfig.cs
@@ -34,7 +34,7 @@ namespace Amazon.Lightsail
     public partial class AmazonLightsailConfig : ClientConfig
     {
         private static readonly string UserAgentString =
-            InternalSDKUtils.BuildUserAgentString("Lightsail", "3.7.304.18");
+            InternalSDKUtils.BuildUserAgentString("Lightsail", "4.0.0.0");
 
         private static readonly AmazonLightsailEndpointResolver EndpointResolver =
             new AmazonLightsailEndpointResolver();
diff --git a/sdk/src/Services/Lightsail/Properties/AssemblyInfo.cs b/sdk/src/Services/Lightsail/Properties/AssemblyInfo.cs
index f466a0a832d8..20a68473e890 100644
--- a/sdk/src/Services/Lightsail/Properties/AssemblyInfo.cs
+++ b/sdk/src/Services/Lightsail/Properties/AssemblyInfo.cs
@@ -41,5 +41,9 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.304.18")]
\ No newline at end of file
+#if BCL
+[assembly: AssemblyVersion("4.0")]
+#else
+[assembly: AssemblyVersion("4.0.0.0")]
+#endif
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/src/Services/LocationService/AWSSDK.LocationService.NetFramework.csproj b/sdk/src/Services/LocationService/AWSSDK.LocationService.NetFramework.csproj
index fabe4cf77891..189103687faa 100644
--- a/sdk/src/Services/LocationService/AWSSDK.LocationService.NetFramework.csproj
+++ b/sdk/src/Services/LocationService/AWSSDK.LocationService.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);BCL;AWS_ASYNC_API;CODE_ANALYSIS</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(RuleSetFileForBuild)' == 'false' Or '$(RuleSetFileForBuild)' == '' ">
diff --git a/sdk/src/Services/LocationService/AWSSDK.LocationService.NetStandard.csproj b/sdk/src/Services/LocationService/AWSSDK.LocationService.NetStandard.csproj
index b858ed5537d9..b9db386c0238 100644
--- a/sdk/src/Services/LocationService/AWSSDK.LocationService.NetStandard.csproj
+++ b/sdk/src/Services/LocationService/AWSSDK.LocationService.NetStandard.csproj
@@ -22,6 +22,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <!-- Async Enumerable Compatibility -->
diff --git a/sdk/src/Services/LocationService/Generated/AmazonLocationServiceConfig.cs b/sdk/src/Services/LocationService/Generated/AmazonLocationServiceConfig.cs
index bb2a75839a88..60de70c54c70 100644
--- a/sdk/src/Services/LocationService/Generated/AmazonLocationServiceConfig.cs
+++ b/sdk/src/Services/LocationService/Generated/AmazonLocationServiceConfig.cs
@@ -34,7 +34,7 @@ namespace Amazon.LocationService
     public partial class AmazonLocationServiceConfig : ClientConfig
     {
         private static readonly string UserAgentString =
-            InternalSDKUtils.BuildUserAgentString("Location", "3.7.304.51");
+            InternalSDKUtils.BuildUserAgentString("Location", "4.0.0.0");
 
         private static readonly AmazonLocationServiceEndpointResolver EndpointResolver =
             new AmazonLocationServiceEndpointResolver();
diff --git a/sdk/src/Services/LocationService/Properties/AssemblyInfo.cs b/sdk/src/Services/LocationService/Properties/AssemblyInfo.cs
index 2309dc2fa21c..7a333a11c8e2 100644
--- a/sdk/src/Services/LocationService/Properties/AssemblyInfo.cs
+++ b/sdk/src/Services/LocationService/Properties/AssemblyInfo.cs
@@ -41,5 +41,9 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.304.51")]
\ No newline at end of file
+#if BCL
+[assembly: AssemblyVersion("4.0")]
+#else
+[assembly: AssemblyVersion("4.0.0.0")]
+#endif
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/src/Services/LookoutEquipment/AWSSDK.LookoutEquipment.NetFramework.csproj b/sdk/src/Services/LookoutEquipment/AWSSDK.LookoutEquipment.NetFramework.csproj
index eba9eb1b244c..c22ec3328bfd 100644
--- a/sdk/src/Services/LookoutEquipment/AWSSDK.LookoutEquipment.NetFramework.csproj
+++ b/sdk/src/Services/LookoutEquipment/AWSSDK.LookoutEquipment.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);BCL;AWS_ASYNC_API;CODE_ANALYSIS</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(RuleSetFileForBuild)' == 'false' Or '$(RuleSetFileForBuild)' == '' ">
diff --git a/sdk/src/Services/LookoutEquipment/AWSSDK.LookoutEquipment.NetStandard.csproj b/sdk/src/Services/LookoutEquipment/AWSSDK.LookoutEquipment.NetStandard.csproj
index 17bccafe2e78..918383919e77 100644
--- a/sdk/src/Services/LookoutEquipment/AWSSDK.LookoutEquipment.NetStandard.csproj
+++ b/sdk/src/Services/LookoutEquipment/AWSSDK.LookoutEquipment.NetStandard.csproj
@@ -22,6 +22,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <!-- Async Enumerable Compatibility -->
diff --git a/sdk/src/Services/LookoutEquipment/Generated/AmazonLookoutEquipmentConfig.cs b/sdk/src/Services/LookoutEquipment/Generated/AmazonLookoutEquipmentConfig.cs
index a557822cf311..14b692e9277d 100644
--- a/sdk/src/Services/LookoutEquipment/Generated/AmazonLookoutEquipmentConfig.cs
+++ b/sdk/src/Services/LookoutEquipment/Generated/AmazonLookoutEquipmentConfig.cs
@@ -34,7 +34,7 @@ namespace Amazon.LookoutEquipment
     public partial class AmazonLookoutEquipmentConfig : ClientConfig
     {
         private static readonly string UserAgentString =
-            InternalSDKUtils.BuildUserAgentString("LookoutEquipment", "3.7.302.32");
+            InternalSDKUtils.BuildUserAgentString("LookoutEquipment", "4.0.0.0");
 
         private static readonly AmazonLookoutEquipmentEndpointResolver EndpointResolver =
             new AmazonLookoutEquipmentEndpointResolver();
diff --git a/sdk/src/Services/LookoutEquipment/Properties/AssemblyInfo.cs b/sdk/src/Services/LookoutEquipment/Properties/AssemblyInfo.cs
index cfef9c4ec690..c07ec543d24d 100644
--- a/sdk/src/Services/LookoutEquipment/Properties/AssemblyInfo.cs
+++ b/sdk/src/Services/LookoutEquipment/Properties/AssemblyInfo.cs
@@ -41,5 +41,9 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.302.32")]
\ No newline at end of file
+#if BCL
+[assembly: AssemblyVersion("4.0")]
+#else
+[assembly: AssemblyVersion("4.0.0.0")]
+#endif
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/src/Services/LookoutMetrics/AWSSDK.LookoutMetrics.NetFramework.csproj b/sdk/src/Services/LookoutMetrics/AWSSDK.LookoutMetrics.NetFramework.csproj
index 16b1dbcbfcec..6926806f3351 100644
--- a/sdk/src/Services/LookoutMetrics/AWSSDK.LookoutMetrics.NetFramework.csproj
+++ b/sdk/src/Services/LookoutMetrics/AWSSDK.LookoutMetrics.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);BCL;AWS_ASYNC_API;CODE_ANALYSIS</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(RuleSetFileForBuild)' == 'false' Or '$(RuleSetFileForBuild)' == '' ">
diff --git a/sdk/src/Services/LookoutMetrics/AWSSDK.LookoutMetrics.NetStandard.csproj b/sdk/src/Services/LookoutMetrics/AWSSDK.LookoutMetrics.NetStandard.csproj
index 524a6d1c23ac..a4a41245069a 100644
--- a/sdk/src/Services/LookoutMetrics/AWSSDK.LookoutMetrics.NetStandard.csproj
+++ b/sdk/src/Services/LookoutMetrics/AWSSDK.LookoutMetrics.NetStandard.csproj
@@ -22,6 +22,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <!-- Async Enumerable Compatibility -->
diff --git a/sdk/src/Services/LookoutMetrics/Generated/AmazonLookoutMetricsConfig.cs b/sdk/src/Services/LookoutMetrics/Generated/AmazonLookoutMetricsConfig.cs
index c6375ea595e2..dfc2bc445079 100644
--- a/sdk/src/Services/LookoutMetrics/Generated/AmazonLookoutMetricsConfig.cs
+++ b/sdk/src/Services/LookoutMetrics/Generated/AmazonLookoutMetricsConfig.cs
@@ -34,7 +34,7 @@ namespace Amazon.LookoutMetrics
     public partial class AmazonLookoutMetricsConfig : ClientConfig
     {
         private static readonly string UserAgentString =
-            InternalSDKUtils.BuildUserAgentString("LookoutMetrics", "3.7.300.84");
+            InternalSDKUtils.BuildUserAgentString("LookoutMetrics", "4.0.0.0");
 
         private static readonly AmazonLookoutMetricsEndpointResolver EndpointResolver =
             new AmazonLookoutMetricsEndpointResolver();
diff --git a/sdk/src/Services/LookoutMetrics/Properties/AssemblyInfo.cs b/sdk/src/Services/LookoutMetrics/Properties/AssemblyInfo.cs
index 2e704f63c58d..9bcef475f544 100644
--- a/sdk/src/Services/LookoutMetrics/Properties/AssemblyInfo.cs
+++ b/sdk/src/Services/LookoutMetrics/Properties/AssemblyInfo.cs
@@ -41,5 +41,9 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.300.84")]
\ No newline at end of file
+#if BCL
+[assembly: AssemblyVersion("4.0")]
+#else
+[assembly: AssemblyVersion("4.0.0.0")]
+#endif
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/src/Services/LookoutforVision/AWSSDK.LookoutforVision.NetFramework.csproj b/sdk/src/Services/LookoutforVision/AWSSDK.LookoutforVision.NetFramework.csproj
index 87f222c453a1..4ba0226df884 100644
--- a/sdk/src/Services/LookoutforVision/AWSSDK.LookoutforVision.NetFramework.csproj
+++ b/sdk/src/Services/LookoutforVision/AWSSDK.LookoutforVision.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);BCL;AWS_ASYNC_API;CODE_ANALYSIS</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(RuleSetFileForBuild)' == 'false' Or '$(RuleSetFileForBuild)' == '' ">
diff --git a/sdk/src/Services/LookoutforVision/AWSSDK.LookoutforVision.NetStandard.csproj b/sdk/src/Services/LookoutforVision/AWSSDK.LookoutforVision.NetStandard.csproj
index 4d802b51ab27..2fa0924517ba 100644
--- a/sdk/src/Services/LookoutforVision/AWSSDK.LookoutforVision.NetStandard.csproj
+++ b/sdk/src/Services/LookoutforVision/AWSSDK.LookoutforVision.NetStandard.csproj
@@ -22,6 +22,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <!-- Async Enumerable Compatibility -->
diff --git a/sdk/src/Services/LookoutforVision/Generated/AmazonLookoutforVisionConfig.cs b/sdk/src/Services/LookoutforVision/Generated/AmazonLookoutforVisionConfig.cs
index d4200b75f40a..bd1494489533 100644
--- a/sdk/src/Services/LookoutforVision/Generated/AmazonLookoutforVisionConfig.cs
+++ b/sdk/src/Services/LookoutforVision/Generated/AmazonLookoutforVisionConfig.cs
@@ -34,7 +34,7 @@ namespace Amazon.LookoutforVision
     public partial class AmazonLookoutforVisionConfig : ClientConfig
     {
         private static readonly string UserAgentString =
-            InternalSDKUtils.BuildUserAgentString("LookoutVision", "3.7.300.84");
+            InternalSDKUtils.BuildUserAgentString("LookoutVision", "4.0.0.0");
 
         private static readonly AmazonLookoutforVisionEndpointResolver EndpointResolver =
             new AmazonLookoutforVisionEndpointResolver();
diff --git a/sdk/src/Services/LookoutforVision/Properties/AssemblyInfo.cs b/sdk/src/Services/LookoutforVision/Properties/AssemblyInfo.cs
index f8b2bdb74d5e..6c9d9b8c88d7 100644
--- a/sdk/src/Services/LookoutforVision/Properties/AssemblyInfo.cs
+++ b/sdk/src/Services/LookoutforVision/Properties/AssemblyInfo.cs
@@ -41,5 +41,9 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.300.84")]
\ No newline at end of file
+#if BCL
+[assembly: AssemblyVersion("4.0")]
+#else
+[assembly: AssemblyVersion("4.0.0.0")]
+#endif
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/src/Services/MQ/AWSSDK.MQ.NetFramework.csproj b/sdk/src/Services/MQ/AWSSDK.MQ.NetFramework.csproj
index 33f904cc30bc..d6ad44ed549a 100644
--- a/sdk/src/Services/MQ/AWSSDK.MQ.NetFramework.csproj
+++ b/sdk/src/Services/MQ/AWSSDK.MQ.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);BCL;AWS_ASYNC_API;CODE_ANALYSIS</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(RuleSetFileForBuild)' == 'false' Or '$(RuleSetFileForBuild)' == '' ">
diff --git a/sdk/src/Services/MQ/AWSSDK.MQ.NetStandard.csproj b/sdk/src/Services/MQ/AWSSDK.MQ.NetStandard.csproj
index ff2bbcce2dbc..569076dbb0d4 100644
--- a/sdk/src/Services/MQ/AWSSDK.MQ.NetStandard.csproj
+++ b/sdk/src/Services/MQ/AWSSDK.MQ.NetStandard.csproj
@@ -22,6 +22,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <!-- Async Enumerable Compatibility -->
diff --git a/sdk/src/Services/MQ/Generated/AmazonMQConfig.cs b/sdk/src/Services/MQ/Generated/AmazonMQConfig.cs
index 56b495153441..ff37b77bdd10 100644
--- a/sdk/src/Services/MQ/Generated/AmazonMQConfig.cs
+++ b/sdk/src/Services/MQ/Generated/AmazonMQConfig.cs
@@ -34,7 +34,7 @@ namespace Amazon.MQ
     public partial class AmazonMQConfig : ClientConfig
     {
         private static readonly string UserAgentString =
-            InternalSDKUtils.BuildUserAgentString("mq", "3.7.300.84");
+            InternalSDKUtils.BuildUserAgentString("mq", "4.0.0.0");
 
         private static readonly AmazonMQEndpointResolver EndpointResolver =
             new AmazonMQEndpointResolver();
diff --git a/sdk/src/Services/MQ/Properties/AssemblyInfo.cs b/sdk/src/Services/MQ/Properties/AssemblyInfo.cs
index 63b7e4bf2e5c..8193a1f39f02 100644
--- a/sdk/src/Services/MQ/Properties/AssemblyInfo.cs
+++ b/sdk/src/Services/MQ/Properties/AssemblyInfo.cs
@@ -41,5 +41,9 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.300.84")]
\ No newline at end of file
+#if BCL
+[assembly: AssemblyVersion("4.0")]
+#else
+[assembly: AssemblyVersion("4.0.0.0")]
+#endif
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/src/Services/MTurk/AWSSDK.MTurk.NetFramework.csproj b/sdk/src/Services/MTurk/AWSSDK.MTurk.NetFramework.csproj
index f5bd574eec10..380b9e003445 100644
--- a/sdk/src/Services/MTurk/AWSSDK.MTurk.NetFramework.csproj
+++ b/sdk/src/Services/MTurk/AWSSDK.MTurk.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);BCL;AWS_ASYNC_API;CODE_ANALYSIS</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(RuleSetFileForBuild)' == 'false' Or '$(RuleSetFileForBuild)' == '' ">
diff --git a/sdk/src/Services/MTurk/AWSSDK.MTurk.NetStandard.csproj b/sdk/src/Services/MTurk/AWSSDK.MTurk.NetStandard.csproj
index 1cc7a08d44de..deada27069f2 100644
--- a/sdk/src/Services/MTurk/AWSSDK.MTurk.NetStandard.csproj
+++ b/sdk/src/Services/MTurk/AWSSDK.MTurk.NetStandard.csproj
@@ -22,6 +22,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <!-- Async Enumerable Compatibility -->
diff --git a/sdk/src/Services/MTurk/Generated/AmazonMTurkConfig.cs b/sdk/src/Services/MTurk/Generated/AmazonMTurkConfig.cs
index 4b76da493e55..ca2d423b1be8 100644
--- a/sdk/src/Services/MTurk/Generated/AmazonMTurkConfig.cs
+++ b/sdk/src/Services/MTurk/Generated/AmazonMTurkConfig.cs
@@ -34,7 +34,7 @@ namespace Amazon.MTurk
     public partial class AmazonMTurkConfig : ClientConfig
     {
         private static readonly string UserAgentString =
-            InternalSDKUtils.BuildUserAgentString("MTurk", "3.7.300.84");
+            InternalSDKUtils.BuildUserAgentString("MTurk", "4.0.0.0");
 
         private static readonly AmazonMTurkEndpointResolver EndpointResolver =
             new AmazonMTurkEndpointResolver();
diff --git a/sdk/src/Services/MTurk/Properties/AssemblyInfo.cs b/sdk/src/Services/MTurk/Properties/AssemblyInfo.cs
index e779f4dec0e1..a8e3d31ef0a9 100644
--- a/sdk/src/Services/MTurk/Properties/AssemblyInfo.cs
+++ b/sdk/src/Services/MTurk/Properties/AssemblyInfo.cs
@@ -41,5 +41,9 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.300.84")]
\ No newline at end of file
+#if BCL
+[assembly: AssemblyVersion("4.0")]
+#else
+[assembly: AssemblyVersion("4.0.0.0")]
+#endif
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/src/Services/MWAA/AWSSDK.MWAA.NetFramework.csproj b/sdk/src/Services/MWAA/AWSSDK.MWAA.NetFramework.csproj
index c61542bf9adb..4ea30b97ef6f 100644
--- a/sdk/src/Services/MWAA/AWSSDK.MWAA.NetFramework.csproj
+++ b/sdk/src/Services/MWAA/AWSSDK.MWAA.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);BCL;AWS_ASYNC_API;CODE_ANALYSIS</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(RuleSetFileForBuild)' == 'false' Or '$(RuleSetFileForBuild)' == '' ">
diff --git a/sdk/src/Services/MWAA/AWSSDK.MWAA.NetStandard.csproj b/sdk/src/Services/MWAA/AWSSDK.MWAA.NetStandard.csproj
index 7cb57d62dee4..0cd435e7e237 100644
--- a/sdk/src/Services/MWAA/AWSSDK.MWAA.NetStandard.csproj
+++ b/sdk/src/Services/MWAA/AWSSDK.MWAA.NetStandard.csproj
@@ -22,6 +22,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <!-- Async Enumerable Compatibility -->
diff --git a/sdk/src/Services/MWAA/Generated/AmazonMWAAConfig.cs b/sdk/src/Services/MWAA/Generated/AmazonMWAAConfig.cs
index dc8077645fde..571b37583d11 100644
--- a/sdk/src/Services/MWAA/Generated/AmazonMWAAConfig.cs
+++ b/sdk/src/Services/MWAA/Generated/AmazonMWAAConfig.cs
@@ -34,7 +34,7 @@ namespace Amazon.MWAA
     public partial class AmazonMWAAConfig : ClientConfig
     {
         private static readonly string UserAgentString =
-            InternalSDKUtils.BuildUserAgentString("MWAA", "3.7.303.43");
+            InternalSDKUtils.BuildUserAgentString("MWAA", "4.0.0.0");
 
         private static readonly AmazonMWAAEndpointResolver EndpointResolver =
             new AmazonMWAAEndpointResolver();
diff --git a/sdk/src/Services/MWAA/Properties/AssemblyInfo.cs b/sdk/src/Services/MWAA/Properties/AssemblyInfo.cs
index 59ffed8bdda9..a0cfd9d472da 100644
--- a/sdk/src/Services/MWAA/Properties/AssemblyInfo.cs
+++ b/sdk/src/Services/MWAA/Properties/AssemblyInfo.cs
@@ -41,5 +41,9 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.303.43")]
\ No newline at end of file
+#if BCL
+[assembly: AssemblyVersion("4.0")]
+#else
+[assembly: AssemblyVersion("4.0.0.0")]
+#endif
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/src/Services/MachineLearning/AWSSDK.MachineLearning.NetFramework.csproj b/sdk/src/Services/MachineLearning/AWSSDK.MachineLearning.NetFramework.csproj
index 3d1f20601524..dfd52b121d84 100644
--- a/sdk/src/Services/MachineLearning/AWSSDK.MachineLearning.NetFramework.csproj
+++ b/sdk/src/Services/MachineLearning/AWSSDK.MachineLearning.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);BCL;AWS_ASYNC_API;CODE_ANALYSIS</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(RuleSetFileForBuild)' == 'false' Or '$(RuleSetFileForBuild)' == '' ">
diff --git a/sdk/src/Services/MachineLearning/AWSSDK.MachineLearning.NetStandard.csproj b/sdk/src/Services/MachineLearning/AWSSDK.MachineLearning.NetStandard.csproj
index 468cf8be9e24..2c633bcab7da 100644
--- a/sdk/src/Services/MachineLearning/AWSSDK.MachineLearning.NetStandard.csproj
+++ b/sdk/src/Services/MachineLearning/AWSSDK.MachineLearning.NetStandard.csproj
@@ -22,6 +22,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <!-- Async Enumerable Compatibility -->
diff --git a/sdk/src/Services/MachineLearning/Generated/AmazonMachineLearningConfig.cs b/sdk/src/Services/MachineLearning/Generated/AmazonMachineLearningConfig.cs
index 45773f18e9a9..1b85badc2f81 100644
--- a/sdk/src/Services/MachineLearning/Generated/AmazonMachineLearningConfig.cs
+++ b/sdk/src/Services/MachineLearning/Generated/AmazonMachineLearningConfig.cs
@@ -34,7 +34,7 @@ namespace Amazon.MachineLearning
     public partial class AmazonMachineLearningConfig : ClientConfig
     {
         private static readonly string UserAgentString =
-            InternalSDKUtils.BuildUserAgentString("Machine Learning", "3.7.300.84");
+            InternalSDKUtils.BuildUserAgentString("Machine Learning", "4.0.0.0");
 
         private static readonly AmazonMachineLearningEndpointResolver EndpointResolver =
             new AmazonMachineLearningEndpointResolver();
diff --git a/sdk/src/Services/MachineLearning/Properties/AssemblyInfo.cs b/sdk/src/Services/MachineLearning/Properties/AssemblyInfo.cs
index 45e08432b054..4d45d42bc775 100644
--- a/sdk/src/Services/MachineLearning/Properties/AssemblyInfo.cs
+++ b/sdk/src/Services/MachineLearning/Properties/AssemblyInfo.cs
@@ -41,5 +41,9 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.300.84")]
\ No newline at end of file
+#if BCL
+[assembly: AssemblyVersion("4.0")]
+#else
+[assembly: AssemblyVersion("4.0.0.0")]
+#endif
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/src/Services/Macie2/AWSSDK.Macie2.NetFramework.csproj b/sdk/src/Services/Macie2/AWSSDK.Macie2.NetFramework.csproj
index 02ec8636bc86..efcc00249493 100644
--- a/sdk/src/Services/Macie2/AWSSDK.Macie2.NetFramework.csproj
+++ b/sdk/src/Services/Macie2/AWSSDK.Macie2.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);BCL;AWS_ASYNC_API;CODE_ANALYSIS</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(RuleSetFileForBuild)' == 'false' Or '$(RuleSetFileForBuild)' == '' ">
diff --git a/sdk/src/Services/Macie2/AWSSDK.Macie2.NetStandard.csproj b/sdk/src/Services/Macie2/AWSSDK.Macie2.NetStandard.csproj
index 0f3586d952ab..f5a2127904da 100644
--- a/sdk/src/Services/Macie2/AWSSDK.Macie2.NetStandard.csproj
+++ b/sdk/src/Services/Macie2/AWSSDK.Macie2.NetStandard.csproj
@@ -22,6 +22,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <!-- Async Enumerable Compatibility -->
diff --git a/sdk/src/Services/Macie2/Generated/AmazonMacie2Config.cs b/sdk/src/Services/Macie2/Generated/AmazonMacie2Config.cs
index 07a1ec3f992d..fb88870ab14c 100644
--- a/sdk/src/Services/Macie2/Generated/AmazonMacie2Config.cs
+++ b/sdk/src/Services/Macie2/Generated/AmazonMacie2Config.cs
@@ -34,7 +34,7 @@ namespace Amazon.Macie2
     public partial class AmazonMacie2Config : ClientConfig
     {
         private static readonly string UserAgentString =
-            InternalSDKUtils.BuildUserAgentString("Macie2", "3.7.302.47");
+            InternalSDKUtils.BuildUserAgentString("Macie2", "4.0.0.0");
 
         private static readonly AmazonMacie2EndpointResolver EndpointResolver =
             new AmazonMacie2EndpointResolver();
diff --git a/sdk/src/Services/Macie2/Properties/AssemblyInfo.cs b/sdk/src/Services/Macie2/Properties/AssemblyInfo.cs
index 8ac3680ba4c6..437078f0cbfe 100644
--- a/sdk/src/Services/Macie2/Properties/AssemblyInfo.cs
+++ b/sdk/src/Services/Macie2/Properties/AssemblyInfo.cs
@@ -41,5 +41,9 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.302.47")]
\ No newline at end of file
+#if BCL
+[assembly: AssemblyVersion("4.0")]
+#else
+[assembly: AssemblyVersion("4.0.0.0")]
+#endif
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/src/Services/MainframeModernization/AWSSDK.MainframeModernization.NetFramework.csproj b/sdk/src/Services/MainframeModernization/AWSSDK.MainframeModernization.NetFramework.csproj
index 4300cc646171..be3734e02295 100644
--- a/sdk/src/Services/MainframeModernization/AWSSDK.MainframeModernization.NetFramework.csproj
+++ b/sdk/src/Services/MainframeModernization/AWSSDK.MainframeModernization.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);BCL;AWS_ASYNC_API;CODE_ANALYSIS</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(RuleSetFileForBuild)' == 'false' Or '$(RuleSetFileForBuild)' == '' ">
diff --git a/sdk/src/Services/MainframeModernization/AWSSDK.MainframeModernization.NetStandard.csproj b/sdk/src/Services/MainframeModernization/AWSSDK.MainframeModernization.NetStandard.csproj
index 46fd7e54c5b8..81ea9e27ffa7 100644
--- a/sdk/src/Services/MainframeModernization/AWSSDK.MainframeModernization.NetStandard.csproj
+++ b/sdk/src/Services/MainframeModernization/AWSSDK.MainframeModernization.NetStandard.csproj
@@ -22,6 +22,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <!-- Async Enumerable Compatibility -->
diff --git a/sdk/src/Services/MainframeModernization/Generated/AmazonMainframeModernizationConfig.cs b/sdk/src/Services/MainframeModernization/Generated/AmazonMainframeModernizationConfig.cs
index 89c633041013..f12c1aa29a46 100644
--- a/sdk/src/Services/MainframeModernization/Generated/AmazonMainframeModernizationConfig.cs
+++ b/sdk/src/Services/MainframeModernization/Generated/AmazonMainframeModernizationConfig.cs
@@ -34,7 +34,7 @@ namespace Amazon.MainframeModernization
     public partial class AmazonMainframeModernizationConfig : ClientConfig
     {
         private static readonly string UserAgentString =
-            InternalSDKUtils.BuildUserAgentString("m2", "3.7.301.9");
+            InternalSDKUtils.BuildUserAgentString("m2", "4.0.0.0");
 
         private static readonly AmazonMainframeModernizationEndpointResolver EndpointResolver =
             new AmazonMainframeModernizationEndpointResolver();
diff --git a/sdk/src/Services/MainframeModernization/Properties/AssemblyInfo.cs b/sdk/src/Services/MainframeModernization/Properties/AssemblyInfo.cs
index 2b8f01dd028e..d642478879dd 100644
--- a/sdk/src/Services/MainframeModernization/Properties/AssemblyInfo.cs
+++ b/sdk/src/Services/MainframeModernization/Properties/AssemblyInfo.cs
@@ -41,5 +41,9 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.301.9")]
\ No newline at end of file
+#if BCL
+[assembly: AssemblyVersion("4.0")]
+#else
+[assembly: AssemblyVersion("4.0.0.0")]
+#endif
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/src/Services/ManagedBlockchain/AWSSDK.ManagedBlockchain.NetFramework.csproj b/sdk/src/Services/ManagedBlockchain/AWSSDK.ManagedBlockchain.NetFramework.csproj
index d1934721dabc..2c8b356d961a 100644
--- a/sdk/src/Services/ManagedBlockchain/AWSSDK.ManagedBlockchain.NetFramework.csproj
+++ b/sdk/src/Services/ManagedBlockchain/AWSSDK.ManagedBlockchain.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);BCL;AWS_ASYNC_API;CODE_ANALYSIS</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(RuleSetFileForBuild)' == 'false' Or '$(RuleSetFileForBuild)' == '' ">
diff --git a/sdk/src/Services/ManagedBlockchain/AWSSDK.ManagedBlockchain.NetStandard.csproj b/sdk/src/Services/ManagedBlockchain/AWSSDK.ManagedBlockchain.NetStandard.csproj
index bcb73c85a889..422ff3104dae 100644
--- a/sdk/src/Services/ManagedBlockchain/AWSSDK.ManagedBlockchain.NetStandard.csproj
+++ b/sdk/src/Services/ManagedBlockchain/AWSSDK.ManagedBlockchain.NetStandard.csproj
@@ -22,6 +22,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <!-- Async Enumerable Compatibility -->
diff --git a/sdk/src/Services/ManagedBlockchain/Generated/AmazonManagedBlockchainConfig.cs b/sdk/src/Services/ManagedBlockchain/Generated/AmazonManagedBlockchainConfig.cs
index 12b90a4b53cd..3832c6757eb9 100644
--- a/sdk/src/Services/ManagedBlockchain/Generated/AmazonManagedBlockchainConfig.cs
+++ b/sdk/src/Services/ManagedBlockchain/Generated/AmazonManagedBlockchainConfig.cs
@@ -34,7 +34,7 @@ namespace Amazon.ManagedBlockchain
     public partial class AmazonManagedBlockchainConfig : ClientConfig
     {
         private static readonly string UserAgentString =
-            InternalSDKUtils.BuildUserAgentString("ManagedBlockchain", "3.7.301.76");
+            InternalSDKUtils.BuildUserAgentString("ManagedBlockchain", "4.0.0.0");
 
         private static readonly AmazonManagedBlockchainEndpointResolver EndpointResolver =
             new AmazonManagedBlockchainEndpointResolver();
diff --git a/sdk/src/Services/ManagedBlockchain/Properties/AssemblyInfo.cs b/sdk/src/Services/ManagedBlockchain/Properties/AssemblyInfo.cs
index 64c0c172a96c..1289d0bab576 100644
--- a/sdk/src/Services/ManagedBlockchain/Properties/AssemblyInfo.cs
+++ b/sdk/src/Services/ManagedBlockchain/Properties/AssemblyInfo.cs
@@ -41,5 +41,9 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.301.76")]
\ No newline at end of file
+#if BCL
+[assembly: AssemblyVersion("4.0")]
+#else
+[assembly: AssemblyVersion("4.0.0.0")]
+#endif
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/src/Services/ManagedBlockchainQuery/AWSSDK.ManagedBlockchainQuery.NetFramework.csproj b/sdk/src/Services/ManagedBlockchainQuery/AWSSDK.ManagedBlockchainQuery.NetFramework.csproj
index 0ba2e7dfb509..c071ad77cee6 100644
--- a/sdk/src/Services/ManagedBlockchainQuery/AWSSDK.ManagedBlockchainQuery.NetFramework.csproj
+++ b/sdk/src/Services/ManagedBlockchainQuery/AWSSDK.ManagedBlockchainQuery.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);BCL;AWS_ASYNC_API;CODE_ANALYSIS</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(RuleSetFileForBuild)' == 'false' Or '$(RuleSetFileForBuild)' == '' ">
diff --git a/sdk/src/Services/ManagedBlockchainQuery/AWSSDK.ManagedBlockchainQuery.NetStandard.csproj b/sdk/src/Services/ManagedBlockchainQuery/AWSSDK.ManagedBlockchainQuery.NetStandard.csproj
index cee5307bdbbf..d9f21ab31471 100644
--- a/sdk/src/Services/ManagedBlockchainQuery/AWSSDK.ManagedBlockchainQuery.NetStandard.csproj
+++ b/sdk/src/Services/ManagedBlockchainQuery/AWSSDK.ManagedBlockchainQuery.NetStandard.csproj
@@ -22,6 +22,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <!-- Async Enumerable Compatibility -->
diff --git a/sdk/src/Services/ManagedBlockchainQuery/Generated/AmazonManagedBlockchainQueryConfig.cs b/sdk/src/Services/ManagedBlockchainQuery/Generated/AmazonManagedBlockchainQueryConfig.cs
index 26b77a57ed84..4df2d5d58422 100644
--- a/sdk/src/Services/ManagedBlockchainQuery/Generated/AmazonManagedBlockchainQueryConfig.cs
+++ b/sdk/src/Services/ManagedBlockchainQuery/Generated/AmazonManagedBlockchainQueryConfig.cs
@@ -34,7 +34,7 @@ namespace Amazon.ManagedBlockchainQuery
     public partial class AmazonManagedBlockchainQueryConfig : ClientConfig
     {
         private static readonly string UserAgentString =
-            InternalSDKUtils.BuildUserAgentString("ManagedBlockchain Query", "3.7.304.25");
+            InternalSDKUtils.BuildUserAgentString("ManagedBlockchain Query", "4.0.0.0");
 
         private static readonly AmazonManagedBlockchainQueryEndpointResolver EndpointResolver =
             new AmazonManagedBlockchainQueryEndpointResolver();
diff --git a/sdk/src/Services/ManagedBlockchainQuery/Properties/AssemblyInfo.cs b/sdk/src/Services/ManagedBlockchainQuery/Properties/AssemblyInfo.cs
index 669c36c94a99..e44ca723ba1f 100644
--- a/sdk/src/Services/ManagedBlockchainQuery/Properties/AssemblyInfo.cs
+++ b/sdk/src/Services/ManagedBlockchainQuery/Properties/AssemblyInfo.cs
@@ -41,5 +41,9 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.304.25")]
\ No newline at end of file
+#if BCL
+[assembly: AssemblyVersion("4.0")]
+#else
+[assembly: AssemblyVersion("4.0.0.0")]
+#endif
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/src/Services/ManagedGrafana/AWSSDK.ManagedGrafana.NetFramework.csproj b/sdk/src/Services/ManagedGrafana/AWSSDK.ManagedGrafana.NetFramework.csproj
index 89b2d6fb7eda..f7c3da6e72d4 100644
--- a/sdk/src/Services/ManagedGrafana/AWSSDK.ManagedGrafana.NetFramework.csproj
+++ b/sdk/src/Services/ManagedGrafana/AWSSDK.ManagedGrafana.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);BCL;AWS_ASYNC_API;CODE_ANALYSIS</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(RuleSetFileForBuild)' == 'false' Or '$(RuleSetFileForBuild)' == '' ">
diff --git a/sdk/src/Services/ManagedGrafana/AWSSDK.ManagedGrafana.NetStandard.csproj b/sdk/src/Services/ManagedGrafana/AWSSDK.ManagedGrafana.NetStandard.csproj
index d924b14b8663..d9d2481ecf42 100644
--- a/sdk/src/Services/ManagedGrafana/AWSSDK.ManagedGrafana.NetStandard.csproj
+++ b/sdk/src/Services/ManagedGrafana/AWSSDK.ManagedGrafana.NetStandard.csproj
@@ -22,6 +22,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <!-- Async Enumerable Compatibility -->
diff --git a/sdk/src/Services/ManagedGrafana/Generated/AmazonManagedGrafanaConfig.cs b/sdk/src/Services/ManagedGrafana/Generated/AmazonManagedGrafanaConfig.cs
index 17d39b29a68b..121d59ed98c5 100644
--- a/sdk/src/Services/ManagedGrafana/Generated/AmazonManagedGrafanaConfig.cs
+++ b/sdk/src/Services/ManagedGrafana/Generated/AmazonManagedGrafanaConfig.cs
@@ -34,7 +34,7 @@ namespace Amazon.ManagedGrafana
     public partial class AmazonManagedGrafanaConfig : ClientConfig
     {
         private static readonly string UserAgentString =
-            InternalSDKUtils.BuildUserAgentString("grafana", "3.7.301.30");
+            InternalSDKUtils.BuildUserAgentString("grafana", "4.0.0.0");
 
         private static readonly AmazonManagedGrafanaEndpointResolver EndpointResolver =
             new AmazonManagedGrafanaEndpointResolver();
diff --git a/sdk/src/Services/ManagedGrafana/Properties/AssemblyInfo.cs b/sdk/src/Services/ManagedGrafana/Properties/AssemblyInfo.cs
index a02a76517683..bc44606cf3f8 100644
--- a/sdk/src/Services/ManagedGrafana/Properties/AssemblyInfo.cs
+++ b/sdk/src/Services/ManagedGrafana/Properties/AssemblyInfo.cs
@@ -41,5 +41,9 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.301.30")]
\ No newline at end of file
+#if BCL
+[assembly: AssemblyVersion("4.0")]
+#else
+[assembly: AssemblyVersion("4.0.0.0")]
+#endif
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/src/Services/MarketplaceAgreement/AWSSDK.MarketplaceAgreement.NetFramework.csproj b/sdk/src/Services/MarketplaceAgreement/AWSSDK.MarketplaceAgreement.NetFramework.csproj
index 632b958af36d..82da0cc9fd1e 100644
--- a/sdk/src/Services/MarketplaceAgreement/AWSSDK.MarketplaceAgreement.NetFramework.csproj
+++ b/sdk/src/Services/MarketplaceAgreement/AWSSDK.MarketplaceAgreement.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);BCL;AWS_ASYNC_API;CODE_ANALYSIS</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(RuleSetFileForBuild)' == 'false' Or '$(RuleSetFileForBuild)' == '' ">
diff --git a/sdk/src/Services/MarketplaceAgreement/AWSSDK.MarketplaceAgreement.NetStandard.csproj b/sdk/src/Services/MarketplaceAgreement/AWSSDK.MarketplaceAgreement.NetStandard.csproj
index 8a0a5f320509..d64c9b002359 100644
--- a/sdk/src/Services/MarketplaceAgreement/AWSSDK.MarketplaceAgreement.NetStandard.csproj
+++ b/sdk/src/Services/MarketplaceAgreement/AWSSDK.MarketplaceAgreement.NetStandard.csproj
@@ -22,6 +22,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <!-- Async Enumerable Compatibility -->
diff --git a/sdk/src/Services/MarketplaceAgreement/Generated/AmazonMarketplaceAgreementConfig.cs b/sdk/src/Services/MarketplaceAgreement/Generated/AmazonMarketplaceAgreementConfig.cs
index 3d0f26d25250..b625cdd6cb21 100644
--- a/sdk/src/Services/MarketplaceAgreement/Generated/AmazonMarketplaceAgreementConfig.cs
+++ b/sdk/src/Services/MarketplaceAgreement/Generated/AmazonMarketplaceAgreementConfig.cs
@@ -34,7 +34,7 @@ namespace Amazon.MarketplaceAgreement
     public partial class AmazonMarketplaceAgreementConfig : ClientConfig
     {
         private static readonly string UserAgentString =
-            InternalSDKUtils.BuildUserAgentString("Marketplace Agreement", "3.7.300.72");
+            InternalSDKUtils.BuildUserAgentString("Marketplace Agreement", "4.0.0.0");
 
         private static readonly AmazonMarketplaceAgreementEndpointResolver EndpointResolver =
             new AmazonMarketplaceAgreementEndpointResolver();
diff --git a/sdk/src/Services/MarketplaceAgreement/Properties/AssemblyInfo.cs b/sdk/src/Services/MarketplaceAgreement/Properties/AssemblyInfo.cs
index ee3fb9ca4784..49cc9e5ce536 100644
--- a/sdk/src/Services/MarketplaceAgreement/Properties/AssemblyInfo.cs
+++ b/sdk/src/Services/MarketplaceAgreement/Properties/AssemblyInfo.cs
@@ -41,5 +41,9 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.300.72")]
\ No newline at end of file
+#if BCL
+[assembly: AssemblyVersion("4.0")]
+#else
+[assembly: AssemblyVersion("4.0.0.0")]
+#endif
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/src/Services/MarketplaceCatalog/AWSSDK.MarketplaceCatalog.NetFramework.csproj b/sdk/src/Services/MarketplaceCatalog/AWSSDK.MarketplaceCatalog.NetFramework.csproj
index 76c008453268..8d9bc2018f65 100644
--- a/sdk/src/Services/MarketplaceCatalog/AWSSDK.MarketplaceCatalog.NetFramework.csproj
+++ b/sdk/src/Services/MarketplaceCatalog/AWSSDK.MarketplaceCatalog.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);BCL;AWS_ASYNC_API;CODE_ANALYSIS</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(RuleSetFileForBuild)' == 'false' Or '$(RuleSetFileForBuild)' == '' ">
diff --git a/sdk/src/Services/MarketplaceCatalog/AWSSDK.MarketplaceCatalog.NetStandard.csproj b/sdk/src/Services/MarketplaceCatalog/AWSSDK.MarketplaceCatalog.NetStandard.csproj
index e88faae96450..6ce82e5e3adf 100644
--- a/sdk/src/Services/MarketplaceCatalog/AWSSDK.MarketplaceCatalog.NetStandard.csproj
+++ b/sdk/src/Services/MarketplaceCatalog/AWSSDK.MarketplaceCatalog.NetStandard.csproj
@@ -22,6 +22,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <!-- Async Enumerable Compatibility -->
diff --git a/sdk/src/Services/MarketplaceCatalog/Generated/AmazonMarketplaceCatalogConfig.cs b/sdk/src/Services/MarketplaceCatalog/Generated/AmazonMarketplaceCatalogConfig.cs
index 63c9aaa592c6..652659837324 100644
--- a/sdk/src/Services/MarketplaceCatalog/Generated/AmazonMarketplaceCatalogConfig.cs
+++ b/sdk/src/Services/MarketplaceCatalog/Generated/AmazonMarketplaceCatalogConfig.cs
@@ -34,7 +34,7 @@ namespace Amazon.MarketplaceCatalog
     public partial class AmazonMarketplaceCatalogConfig : ClientConfig
     {
         private static readonly string UserAgentString =
-            InternalSDKUtils.BuildUserAgentString("Marketplace Catalog", "3.7.304.19");
+            InternalSDKUtils.BuildUserAgentString("Marketplace Catalog", "4.0.0.0");
 
         private static readonly AmazonMarketplaceCatalogEndpointResolver EndpointResolver =
             new AmazonMarketplaceCatalogEndpointResolver();
diff --git a/sdk/src/Services/MarketplaceCatalog/Properties/AssemblyInfo.cs b/sdk/src/Services/MarketplaceCatalog/Properties/AssemblyInfo.cs
index cd1188296631..0e07dbb8fe32 100644
--- a/sdk/src/Services/MarketplaceCatalog/Properties/AssemblyInfo.cs
+++ b/sdk/src/Services/MarketplaceCatalog/Properties/AssemblyInfo.cs
@@ -41,5 +41,9 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.304.19")]
\ No newline at end of file
+#if BCL
+[assembly: AssemblyVersion("4.0")]
+#else
+[assembly: AssemblyVersion("4.0.0.0")]
+#endif
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/src/Services/MarketplaceDeployment/AWSSDK.MarketplaceDeployment.NetFramework.csproj b/sdk/src/Services/MarketplaceDeployment/AWSSDK.MarketplaceDeployment.NetFramework.csproj
index 70632a4b0d96..ab9ea6828c9c 100644
--- a/sdk/src/Services/MarketplaceDeployment/AWSSDK.MarketplaceDeployment.NetFramework.csproj
+++ b/sdk/src/Services/MarketplaceDeployment/AWSSDK.MarketplaceDeployment.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);BCL;AWS_ASYNC_API;CODE_ANALYSIS</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(RuleSetFileForBuild)' == 'false' Or '$(RuleSetFileForBuild)' == '' ">
diff --git a/sdk/src/Services/MarketplaceDeployment/AWSSDK.MarketplaceDeployment.NetStandard.csproj b/sdk/src/Services/MarketplaceDeployment/AWSSDK.MarketplaceDeployment.NetStandard.csproj
index 6e62920f276a..62c02736d37d 100644
--- a/sdk/src/Services/MarketplaceDeployment/AWSSDK.MarketplaceDeployment.NetStandard.csproj
+++ b/sdk/src/Services/MarketplaceDeployment/AWSSDK.MarketplaceDeployment.NetStandard.csproj
@@ -22,6 +22,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <!-- Async Enumerable Compatibility -->
diff --git a/sdk/src/Services/MarketplaceDeployment/Generated/AmazonMarketplaceDeploymentConfig.cs b/sdk/src/Services/MarketplaceDeployment/Generated/AmazonMarketplaceDeploymentConfig.cs
index 3da36113b9a2..2478a639ceaf 100644
--- a/sdk/src/Services/MarketplaceDeployment/Generated/AmazonMarketplaceDeploymentConfig.cs
+++ b/sdk/src/Services/MarketplaceDeployment/Generated/AmazonMarketplaceDeploymentConfig.cs
@@ -34,7 +34,7 @@ namespace Amazon.MarketplaceDeployment
     public partial class AmazonMarketplaceDeploymentConfig : ClientConfig
     {
         private static readonly string UserAgentString =
-            InternalSDKUtils.BuildUserAgentString("Marketplace Deployment", "3.7.300.72");
+            InternalSDKUtils.BuildUserAgentString("Marketplace Deployment", "4.0.0.0");
 
         private static readonly AmazonMarketplaceDeploymentEndpointResolver EndpointResolver =
             new AmazonMarketplaceDeploymentEndpointResolver();
diff --git a/sdk/src/Services/MarketplaceDeployment/Properties/AssemblyInfo.cs b/sdk/src/Services/MarketplaceDeployment/Properties/AssemblyInfo.cs
index 2a1c51222fc6..5b78efbce297 100644
--- a/sdk/src/Services/MarketplaceDeployment/Properties/AssemblyInfo.cs
+++ b/sdk/src/Services/MarketplaceDeployment/Properties/AssemblyInfo.cs
@@ -41,5 +41,9 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.300.72")]
\ No newline at end of file
+#if BCL
+[assembly: AssemblyVersion("4.0")]
+#else
+[assembly: AssemblyVersion("4.0.0.0")]
+#endif
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/src/Services/MarketplaceEntitlementService/AWSSDK.MarketplaceEntitlementService.NetFramework.csproj b/sdk/src/Services/MarketplaceEntitlementService/AWSSDK.MarketplaceEntitlementService.NetFramework.csproj
index 0faaf2664ca6..6e76f30dfe13 100644
--- a/sdk/src/Services/MarketplaceEntitlementService/AWSSDK.MarketplaceEntitlementService.NetFramework.csproj
+++ b/sdk/src/Services/MarketplaceEntitlementService/AWSSDK.MarketplaceEntitlementService.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);BCL;AWS_ASYNC_API;CODE_ANALYSIS</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(RuleSetFileForBuild)' == 'false' Or '$(RuleSetFileForBuild)' == '' ">
diff --git a/sdk/src/Services/MarketplaceEntitlementService/AWSSDK.MarketplaceEntitlementService.NetStandard.csproj b/sdk/src/Services/MarketplaceEntitlementService/AWSSDK.MarketplaceEntitlementService.NetStandard.csproj
index 416f4855298d..addcef812246 100644
--- a/sdk/src/Services/MarketplaceEntitlementService/AWSSDK.MarketplaceEntitlementService.NetStandard.csproj
+++ b/sdk/src/Services/MarketplaceEntitlementService/AWSSDK.MarketplaceEntitlementService.NetStandard.csproj
@@ -22,6 +22,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <!-- Async Enumerable Compatibility -->
diff --git a/sdk/src/Services/MarketplaceEntitlementService/Generated/AmazonMarketplaceEntitlementServiceConfig.cs b/sdk/src/Services/MarketplaceEntitlementService/Generated/AmazonMarketplaceEntitlementServiceConfig.cs
index 1f23cf3f59fe..d9f03ea1a0cf 100644
--- a/sdk/src/Services/MarketplaceEntitlementService/Generated/AmazonMarketplaceEntitlementServiceConfig.cs
+++ b/sdk/src/Services/MarketplaceEntitlementService/Generated/AmazonMarketplaceEntitlementServiceConfig.cs
@@ -34,7 +34,7 @@ namespace Amazon.MarketplaceEntitlementService
     public partial class AmazonMarketplaceEntitlementServiceConfig : ClientConfig
     {
         private static readonly string UserAgentString =
-            InternalSDKUtils.BuildUserAgentString("Marketplace Entitlement Service", "3.7.302.1");
+            InternalSDKUtils.BuildUserAgentString("Marketplace Entitlement Service", "4.0.0.0");
 
         private static readonly AmazonMarketplaceEntitlementServiceEndpointResolver EndpointResolver =
             new AmazonMarketplaceEntitlementServiceEndpointResolver();
diff --git a/sdk/src/Services/MarketplaceEntitlementService/Properties/AssemblyInfo.cs b/sdk/src/Services/MarketplaceEntitlementService/Properties/AssemblyInfo.cs
index 8a8140f5ba4d..904fb4d23241 100644
--- a/sdk/src/Services/MarketplaceEntitlementService/Properties/AssemblyInfo.cs
+++ b/sdk/src/Services/MarketplaceEntitlementService/Properties/AssemblyInfo.cs
@@ -41,5 +41,9 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.302.1")]
\ No newline at end of file
+#if BCL
+[assembly: AssemblyVersion("4.0")]
+#else
+[assembly: AssemblyVersion("4.0.0.0")]
+#endif
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/src/Services/MediaConnect/AWSSDK.MediaConnect.NetFramework.csproj b/sdk/src/Services/MediaConnect/AWSSDK.MediaConnect.NetFramework.csproj
index 3b6c53145ec0..f33f5e5a81a5 100644
--- a/sdk/src/Services/MediaConnect/AWSSDK.MediaConnect.NetFramework.csproj
+++ b/sdk/src/Services/MediaConnect/AWSSDK.MediaConnect.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);BCL;AWS_ASYNC_API;CODE_ANALYSIS</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(RuleSetFileForBuild)' == 'false' Or '$(RuleSetFileForBuild)' == '' ">
diff --git a/sdk/src/Services/MediaConnect/AWSSDK.MediaConnect.NetStandard.csproj b/sdk/src/Services/MediaConnect/AWSSDK.MediaConnect.NetStandard.csproj
index 0f4165386f74..9baddf39dff6 100644
--- a/sdk/src/Services/MediaConnect/AWSSDK.MediaConnect.NetStandard.csproj
+++ b/sdk/src/Services/MediaConnect/AWSSDK.MediaConnect.NetStandard.csproj
@@ -22,6 +22,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <!-- Async Enumerable Compatibility -->
diff --git a/sdk/src/Services/MediaConnect/Generated/AmazonMediaConnectConfig.cs b/sdk/src/Services/MediaConnect/Generated/AmazonMediaConnectConfig.cs
index 9902f5d9b43a..dae2cfec3723 100644
--- a/sdk/src/Services/MediaConnect/Generated/AmazonMediaConnectConfig.cs
+++ b/sdk/src/Services/MediaConnect/Generated/AmazonMediaConnectConfig.cs
@@ -34,7 +34,7 @@ namespace Amazon.MediaConnect
     public partial class AmazonMediaConnectConfig : ClientConfig
     {
         private static readonly string UserAgentString =
-            InternalSDKUtils.BuildUserAgentString("MediaConnect", "3.7.301.59");
+            InternalSDKUtils.BuildUserAgentString("MediaConnect", "4.0.0.0");
 
         private static readonly AmazonMediaConnectEndpointResolver EndpointResolver =
             new AmazonMediaConnectEndpointResolver();
diff --git a/sdk/src/Services/MediaConnect/Properties/AssemblyInfo.cs b/sdk/src/Services/MediaConnect/Properties/AssemblyInfo.cs
index efc1cf0ff89d..d474a21ba767 100644
--- a/sdk/src/Services/MediaConnect/Properties/AssemblyInfo.cs
+++ b/sdk/src/Services/MediaConnect/Properties/AssemblyInfo.cs
@@ -41,5 +41,9 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.301.59")]
\ No newline at end of file
+#if BCL
+[assembly: AssemblyVersion("4.0")]
+#else
+[assembly: AssemblyVersion("4.0.0.0")]
+#endif
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/src/Services/MediaConvert/AWSSDK.MediaConvert.NetFramework.csproj b/sdk/src/Services/MediaConvert/AWSSDK.MediaConvert.NetFramework.csproj
index c1d0047f076d..0b6dab62c2d9 100644
--- a/sdk/src/Services/MediaConvert/AWSSDK.MediaConvert.NetFramework.csproj
+++ b/sdk/src/Services/MediaConvert/AWSSDK.MediaConvert.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);BCL;AWS_ASYNC_API;CODE_ANALYSIS</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(RuleSetFileForBuild)' == 'false' Or '$(RuleSetFileForBuild)' == '' ">
diff --git a/sdk/src/Services/MediaConvert/AWSSDK.MediaConvert.NetStandard.csproj b/sdk/src/Services/MediaConvert/AWSSDK.MediaConvert.NetStandard.csproj
index 518ee33286f3..903ccbccae38 100644
--- a/sdk/src/Services/MediaConvert/AWSSDK.MediaConvert.NetStandard.csproj
+++ b/sdk/src/Services/MediaConvert/AWSSDK.MediaConvert.NetStandard.csproj
@@ -22,6 +22,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <!-- Async Enumerable Compatibility -->
diff --git a/sdk/src/Services/MediaConvert/Generated/AmazonMediaConvertConfig.cs b/sdk/src/Services/MediaConvert/Generated/AmazonMediaConvertConfig.cs
index e36760828e09..a5786e3d51b6 100644
--- a/sdk/src/Services/MediaConvert/Generated/AmazonMediaConvertConfig.cs
+++ b/sdk/src/Services/MediaConvert/Generated/AmazonMediaConvertConfig.cs
@@ -34,7 +34,7 @@ namespace Amazon.MediaConvert
     public partial class AmazonMediaConvertConfig : ClientConfig
     {
         private static readonly string UserAgentString =
-            InternalSDKUtils.BuildUserAgentString("MediaConvert", "3.7.304.12");
+            InternalSDKUtils.BuildUserAgentString("MediaConvert", "4.0.0.0");
 
         private static readonly AmazonMediaConvertEndpointResolver EndpointResolver =
             new AmazonMediaConvertEndpointResolver();
diff --git a/sdk/src/Services/MediaConvert/Properties/AssemblyInfo.cs b/sdk/src/Services/MediaConvert/Properties/AssemblyInfo.cs
index f6ba087ee2d9..3c5768edc6c7 100644
--- a/sdk/src/Services/MediaConvert/Properties/AssemblyInfo.cs
+++ b/sdk/src/Services/MediaConvert/Properties/AssemblyInfo.cs
@@ -41,5 +41,9 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.304.12")]
\ No newline at end of file
+#if BCL
+[assembly: AssemblyVersion("4.0")]
+#else
+[assembly: AssemblyVersion("4.0.0.0")]
+#endif
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/src/Services/MediaLive/AWSSDK.MediaLive.NetFramework.csproj b/sdk/src/Services/MediaLive/AWSSDK.MediaLive.NetFramework.csproj
index 22be143186de..9b8e2b397664 100644
--- a/sdk/src/Services/MediaLive/AWSSDK.MediaLive.NetFramework.csproj
+++ b/sdk/src/Services/MediaLive/AWSSDK.MediaLive.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);BCL;AWS_ASYNC_API;CODE_ANALYSIS</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(RuleSetFileForBuild)' == 'false' Or '$(RuleSetFileForBuild)' == '' ">
diff --git a/sdk/src/Services/MediaLive/AWSSDK.MediaLive.NetStandard.csproj b/sdk/src/Services/MediaLive/AWSSDK.MediaLive.NetStandard.csproj
index 649a4321f8f0..7591c5f8f53d 100644
--- a/sdk/src/Services/MediaLive/AWSSDK.MediaLive.NetStandard.csproj
+++ b/sdk/src/Services/MediaLive/AWSSDK.MediaLive.NetStandard.csproj
@@ -22,6 +22,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <!-- Async Enumerable Compatibility -->
diff --git a/sdk/src/Services/MediaLive/Generated/AmazonMediaLiveConfig.cs b/sdk/src/Services/MediaLive/Generated/AmazonMediaLiveConfig.cs
index a802975b82b6..92f69508befe 100644
--- a/sdk/src/Services/MediaLive/Generated/AmazonMediaLiveConfig.cs
+++ b/sdk/src/Services/MediaLive/Generated/AmazonMediaLiveConfig.cs
@@ -34,7 +34,7 @@ namespace Amazon.MediaLive
     public partial class AmazonMediaLiveConfig : ClientConfig
     {
         private static readonly string UserAgentString =
-            InternalSDKUtils.BuildUserAgentString("MediaLive", "3.7.307.10");
+            InternalSDKUtils.BuildUserAgentString("MediaLive", "4.0.0.0");
 
         private static readonly AmazonMediaLiveEndpointResolver EndpointResolver =
             new AmazonMediaLiveEndpointResolver();
diff --git a/sdk/src/Services/MediaLive/Properties/AssemblyInfo.cs b/sdk/src/Services/MediaLive/Properties/AssemblyInfo.cs
index 2dd14f6e3336..9b9fb4d23a5a 100644
--- a/sdk/src/Services/MediaLive/Properties/AssemblyInfo.cs
+++ b/sdk/src/Services/MediaLive/Properties/AssemblyInfo.cs
@@ -41,5 +41,9 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.307.10")]
\ No newline at end of file
+#if BCL
+[assembly: AssemblyVersion("4.0")]
+#else
+[assembly: AssemblyVersion("4.0.0.0")]
+#endif
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/src/Services/MediaPackage/AWSSDK.MediaPackage.NetFramework.csproj b/sdk/src/Services/MediaPackage/AWSSDK.MediaPackage.NetFramework.csproj
index a172975fb8d5..8018c2dee8ee 100644
--- a/sdk/src/Services/MediaPackage/AWSSDK.MediaPackage.NetFramework.csproj
+++ b/sdk/src/Services/MediaPackage/AWSSDK.MediaPackage.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);BCL;AWS_ASYNC_API;CODE_ANALYSIS</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(RuleSetFileForBuild)' == 'false' Or '$(RuleSetFileForBuild)' == '' ">
diff --git a/sdk/src/Services/MediaPackage/AWSSDK.MediaPackage.NetStandard.csproj b/sdk/src/Services/MediaPackage/AWSSDK.MediaPackage.NetStandard.csproj
index b25404faa799..c4e7ff53484d 100644
--- a/sdk/src/Services/MediaPackage/AWSSDK.MediaPackage.NetStandard.csproj
+++ b/sdk/src/Services/MediaPackage/AWSSDK.MediaPackage.NetStandard.csproj
@@ -22,6 +22,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <!-- Async Enumerable Compatibility -->
diff --git a/sdk/src/Services/MediaPackage/Generated/AmazonMediaPackageConfig.cs b/sdk/src/Services/MediaPackage/Generated/AmazonMediaPackageConfig.cs
index 4c6253bf67c3..98b8ca9c45cd 100644
--- a/sdk/src/Services/MediaPackage/Generated/AmazonMediaPackageConfig.cs
+++ b/sdk/src/Services/MediaPackage/Generated/AmazonMediaPackageConfig.cs
@@ -34,7 +34,7 @@ namespace Amazon.MediaPackage
     public partial class AmazonMediaPackageConfig : ClientConfig
     {
         private static readonly string UserAgentString =
-            InternalSDKUtils.BuildUserAgentString("MediaPackage", "3.7.301.80");
+            InternalSDKUtils.BuildUserAgentString("MediaPackage", "4.0.0.0");
 
         private static readonly AmazonMediaPackageEndpointResolver EndpointResolver =
             new AmazonMediaPackageEndpointResolver();
diff --git a/sdk/src/Services/MediaPackage/Properties/AssemblyInfo.cs b/sdk/src/Services/MediaPackage/Properties/AssemblyInfo.cs
index 278d9955c59f..43263b8ea3fa 100644
--- a/sdk/src/Services/MediaPackage/Properties/AssemblyInfo.cs
+++ b/sdk/src/Services/MediaPackage/Properties/AssemblyInfo.cs
@@ -41,5 +41,9 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.301.80")]
\ No newline at end of file
+#if BCL
+[assembly: AssemblyVersion("4.0")]
+#else
+[assembly: AssemblyVersion("4.0.0.0")]
+#endif
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/src/Services/MediaPackageV2/AWSSDK.MediaPackageV2.NetFramework.csproj b/sdk/src/Services/MediaPackageV2/AWSSDK.MediaPackageV2.NetFramework.csproj
index bdf9ffb54f41..accb9818768a 100644
--- a/sdk/src/Services/MediaPackageV2/AWSSDK.MediaPackageV2.NetFramework.csproj
+++ b/sdk/src/Services/MediaPackageV2/AWSSDK.MediaPackageV2.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);BCL;AWS_ASYNC_API;CODE_ANALYSIS</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(RuleSetFileForBuild)' == 'false' Or '$(RuleSetFileForBuild)' == '' ">
diff --git a/sdk/src/Services/MediaPackageV2/AWSSDK.MediaPackageV2.NetStandard.csproj b/sdk/src/Services/MediaPackageV2/AWSSDK.MediaPackageV2.NetStandard.csproj
index 01aa52a0ea29..bbf278bc2e8b 100644
--- a/sdk/src/Services/MediaPackageV2/AWSSDK.MediaPackageV2.NetStandard.csproj
+++ b/sdk/src/Services/MediaPackageV2/AWSSDK.MediaPackageV2.NetStandard.csproj
@@ -22,6 +22,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <!-- Async Enumerable Compatibility -->
diff --git a/sdk/src/Services/MediaPackageV2/Generated/AmazonMediaPackageV2Config.cs b/sdk/src/Services/MediaPackageV2/Generated/AmazonMediaPackageV2Config.cs
index 7e84443a98c8..ee82cfd1f00c 100644
--- a/sdk/src/Services/MediaPackageV2/Generated/AmazonMediaPackageV2Config.cs
+++ b/sdk/src/Services/MediaPackageV2/Generated/AmazonMediaPackageV2Config.cs
@@ -34,7 +34,7 @@ namespace Amazon.MediaPackageV2
     public partial class AmazonMediaPackageV2Config : ClientConfig
     {
         private static readonly string UserAgentString =
-            InternalSDKUtils.BuildUserAgentString("MediaPackageV2", "3.7.302.9");
+            InternalSDKUtils.BuildUserAgentString("MediaPackageV2", "4.0.0.0");
 
         private static readonly AmazonMediaPackageV2EndpointResolver EndpointResolver =
             new AmazonMediaPackageV2EndpointResolver();
diff --git a/sdk/src/Services/MediaPackageV2/Properties/AssemblyInfo.cs b/sdk/src/Services/MediaPackageV2/Properties/AssemblyInfo.cs
index 806b4167a84f..0c697de27372 100644
--- a/sdk/src/Services/MediaPackageV2/Properties/AssemblyInfo.cs
+++ b/sdk/src/Services/MediaPackageV2/Properties/AssemblyInfo.cs
@@ -41,5 +41,9 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.302.9")]
\ No newline at end of file
+#if BCL
+[assembly: AssemblyVersion("4.0")]
+#else
+[assembly: AssemblyVersion("4.0.0.0")]
+#endif
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/src/Services/MediaPackageVod/AWSSDK.MediaPackageVod.NetFramework.csproj b/sdk/src/Services/MediaPackageVod/AWSSDK.MediaPackageVod.NetFramework.csproj
index 221c0b8a24f7..283cae569506 100644
--- a/sdk/src/Services/MediaPackageVod/AWSSDK.MediaPackageVod.NetFramework.csproj
+++ b/sdk/src/Services/MediaPackageVod/AWSSDK.MediaPackageVod.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);BCL;AWS_ASYNC_API;CODE_ANALYSIS</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(RuleSetFileForBuild)' == 'false' Or '$(RuleSetFileForBuild)' == '' ">
diff --git a/sdk/src/Services/MediaPackageVod/AWSSDK.MediaPackageVod.NetStandard.csproj b/sdk/src/Services/MediaPackageVod/AWSSDK.MediaPackageVod.NetStandard.csproj
index ba4cf97686a8..28aa81da6fcd 100644
--- a/sdk/src/Services/MediaPackageVod/AWSSDK.MediaPackageVod.NetStandard.csproj
+++ b/sdk/src/Services/MediaPackageVod/AWSSDK.MediaPackageVod.NetStandard.csproj
@@ -22,6 +22,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <!-- Async Enumerable Compatibility -->
diff --git a/sdk/src/Services/MediaPackageVod/Generated/AmazonMediaPackageVodConfig.cs b/sdk/src/Services/MediaPackageVod/Generated/AmazonMediaPackageVodConfig.cs
index af62f3e73b36..38f780cb58b8 100644
--- a/sdk/src/Services/MediaPackageVod/Generated/AmazonMediaPackageVodConfig.cs
+++ b/sdk/src/Services/MediaPackageVod/Generated/AmazonMediaPackageVodConfig.cs
@@ -34,7 +34,7 @@ namespace Amazon.MediaPackageVod
     public partial class AmazonMediaPackageVodConfig : ClientConfig
     {
         private static readonly string UserAgentString =
-            InternalSDKUtils.BuildUserAgentString("MediaPackage Vod", "3.7.300.84");
+            InternalSDKUtils.BuildUserAgentString("MediaPackage Vod", "4.0.0.0");
 
         private static readonly AmazonMediaPackageVodEndpointResolver EndpointResolver =
             new AmazonMediaPackageVodEndpointResolver();
diff --git a/sdk/src/Services/MediaPackageVod/Properties/AssemblyInfo.cs b/sdk/src/Services/MediaPackageVod/Properties/AssemblyInfo.cs
index c457d968ffe9..a4c27005dcea 100644
--- a/sdk/src/Services/MediaPackageVod/Properties/AssemblyInfo.cs
+++ b/sdk/src/Services/MediaPackageVod/Properties/AssemblyInfo.cs
@@ -41,5 +41,9 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.300.84")]
\ No newline at end of file
+#if BCL
+[assembly: AssemblyVersion("4.0")]
+#else
+[assembly: AssemblyVersion("4.0.0.0")]
+#endif
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/src/Services/MediaStore/AWSSDK.MediaStore.NetFramework.csproj b/sdk/src/Services/MediaStore/AWSSDK.MediaStore.NetFramework.csproj
index 519a85cd6e76..04d881f7e353 100644
--- a/sdk/src/Services/MediaStore/AWSSDK.MediaStore.NetFramework.csproj
+++ b/sdk/src/Services/MediaStore/AWSSDK.MediaStore.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);BCL;AWS_ASYNC_API;CODE_ANALYSIS</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(RuleSetFileForBuild)' == 'false' Or '$(RuleSetFileForBuild)' == '' ">
diff --git a/sdk/src/Services/MediaStore/AWSSDK.MediaStore.NetStandard.csproj b/sdk/src/Services/MediaStore/AWSSDK.MediaStore.NetStandard.csproj
index fd997d067b5a..09299610357a 100644
--- a/sdk/src/Services/MediaStore/AWSSDK.MediaStore.NetStandard.csproj
+++ b/sdk/src/Services/MediaStore/AWSSDK.MediaStore.NetStandard.csproj
@@ -22,6 +22,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <!-- Async Enumerable Compatibility -->
diff --git a/sdk/src/Services/MediaStore/Generated/AmazonMediaStoreConfig.cs b/sdk/src/Services/MediaStore/Generated/AmazonMediaStoreConfig.cs
index 39b82a3b1b1a..2e44725fc69e 100644
--- a/sdk/src/Services/MediaStore/Generated/AmazonMediaStoreConfig.cs
+++ b/sdk/src/Services/MediaStore/Generated/AmazonMediaStoreConfig.cs
@@ -34,7 +34,7 @@ namespace Amazon.MediaStore
     public partial class AmazonMediaStoreConfig : ClientConfig
     {
         private static readonly string UserAgentString =
-            InternalSDKUtils.BuildUserAgentString("MediaStore", "3.7.300.84");
+            InternalSDKUtils.BuildUserAgentString("MediaStore", "4.0.0.0");
 
         private static readonly AmazonMediaStoreEndpointResolver EndpointResolver =
             new AmazonMediaStoreEndpointResolver();
diff --git a/sdk/src/Services/MediaStore/Properties/AssemblyInfo.cs b/sdk/src/Services/MediaStore/Properties/AssemblyInfo.cs
index 52987f53789b..5f3c256e7251 100644
--- a/sdk/src/Services/MediaStore/Properties/AssemblyInfo.cs
+++ b/sdk/src/Services/MediaStore/Properties/AssemblyInfo.cs
@@ -41,5 +41,9 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.300.84")]
\ No newline at end of file
+#if BCL
+[assembly: AssemblyVersion("4.0")]
+#else
+[assembly: AssemblyVersion("4.0.0.0")]
+#endif
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/src/Services/MediaStoreData/AWSSDK.MediaStoreData.NetFramework.csproj b/sdk/src/Services/MediaStoreData/AWSSDK.MediaStoreData.NetFramework.csproj
index 9cc4839eaa8c..cdbc0e755194 100644
--- a/sdk/src/Services/MediaStoreData/AWSSDK.MediaStoreData.NetFramework.csproj
+++ b/sdk/src/Services/MediaStoreData/AWSSDK.MediaStoreData.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);BCL;AWS_ASYNC_API;CODE_ANALYSIS</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(RuleSetFileForBuild)' == 'false' Or '$(RuleSetFileForBuild)' == '' ">
diff --git a/sdk/src/Services/MediaStoreData/AWSSDK.MediaStoreData.NetStandard.csproj b/sdk/src/Services/MediaStoreData/AWSSDK.MediaStoreData.NetStandard.csproj
index 294b9c9592bc..6eabc9fa15d0 100644
--- a/sdk/src/Services/MediaStoreData/AWSSDK.MediaStoreData.NetStandard.csproj
+++ b/sdk/src/Services/MediaStoreData/AWSSDK.MediaStoreData.NetStandard.csproj
@@ -22,6 +22,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <!-- Async Enumerable Compatibility -->
diff --git a/sdk/src/Services/MediaStoreData/Generated/AmazonMediaStoreDataConfig.cs b/sdk/src/Services/MediaStoreData/Generated/AmazonMediaStoreDataConfig.cs
index bd02b2d3cc2f..8c7db250f62a 100644
--- a/sdk/src/Services/MediaStoreData/Generated/AmazonMediaStoreDataConfig.cs
+++ b/sdk/src/Services/MediaStoreData/Generated/AmazonMediaStoreDataConfig.cs
@@ -34,7 +34,7 @@ namespace Amazon.MediaStoreData
     public partial class AmazonMediaStoreDataConfig : ClientConfig
     {
         private static readonly string UserAgentString =
-            InternalSDKUtils.BuildUserAgentString("MediaStore Data", "3.7.300.84");
+            InternalSDKUtils.BuildUserAgentString("MediaStore Data", "4.0.0.0");
 
         private static readonly AmazonMediaStoreDataEndpointResolver EndpointResolver =
             new AmazonMediaStoreDataEndpointResolver();
diff --git a/sdk/src/Services/MediaStoreData/Properties/AssemblyInfo.cs b/sdk/src/Services/MediaStoreData/Properties/AssemblyInfo.cs
index 6886b0560c6d..b377663ba741 100644
--- a/sdk/src/Services/MediaStoreData/Properties/AssemblyInfo.cs
+++ b/sdk/src/Services/MediaStoreData/Properties/AssemblyInfo.cs
@@ -41,5 +41,9 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.300.84")]
\ No newline at end of file
+#if BCL
+[assembly: AssemblyVersion("4.0")]
+#else
+[assembly: AssemblyVersion("4.0.0.0")]
+#endif
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/src/Services/MediaTailor/AWSSDK.MediaTailor.NetFramework.csproj b/sdk/src/Services/MediaTailor/AWSSDK.MediaTailor.NetFramework.csproj
index 02ffa7a447f9..c7e415096b1d 100644
--- a/sdk/src/Services/MediaTailor/AWSSDK.MediaTailor.NetFramework.csproj
+++ b/sdk/src/Services/MediaTailor/AWSSDK.MediaTailor.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);BCL;AWS_ASYNC_API;CODE_ANALYSIS</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(RuleSetFileForBuild)' == 'false' Or '$(RuleSetFileForBuild)' == '' ">
diff --git a/sdk/src/Services/MediaTailor/AWSSDK.MediaTailor.NetStandard.csproj b/sdk/src/Services/MediaTailor/AWSSDK.MediaTailor.NetStandard.csproj
index dfe75e34eec2..680de624113c 100644
--- a/sdk/src/Services/MediaTailor/AWSSDK.MediaTailor.NetStandard.csproj
+++ b/sdk/src/Services/MediaTailor/AWSSDK.MediaTailor.NetStandard.csproj
@@ -22,6 +22,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <!-- Async Enumerable Compatibility -->
diff --git a/sdk/src/Services/MediaTailor/Generated/AmazonMediaTailorConfig.cs b/sdk/src/Services/MediaTailor/Generated/AmazonMediaTailorConfig.cs
index e212e1cbe8b7..303743e001b1 100644
--- a/sdk/src/Services/MediaTailor/Generated/AmazonMediaTailorConfig.cs
+++ b/sdk/src/Services/MediaTailor/Generated/AmazonMediaTailorConfig.cs
@@ -34,7 +34,7 @@ namespace Amazon.MediaTailor
     public partial class AmazonMediaTailorConfig : ClientConfig
     {
         private static readonly string UserAgentString =
-            InternalSDKUtils.BuildUserAgentString("MediaTailor", "3.7.305.10");
+            InternalSDKUtils.BuildUserAgentString("MediaTailor", "4.0.0.0");
 
         private static readonly AmazonMediaTailorEndpointResolver EndpointResolver =
             new AmazonMediaTailorEndpointResolver();
diff --git a/sdk/src/Services/MediaTailor/Properties/AssemblyInfo.cs b/sdk/src/Services/MediaTailor/Properties/AssemblyInfo.cs
index 7455bce3fe6b..83128e25986a 100644
--- a/sdk/src/Services/MediaTailor/Properties/AssemblyInfo.cs
+++ b/sdk/src/Services/MediaTailor/Properties/AssemblyInfo.cs
@@ -41,5 +41,9 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.305.10")]
\ No newline at end of file
+#if BCL
+[assembly: AssemblyVersion("4.0")]
+#else
+[assembly: AssemblyVersion("4.0.0.0")]
+#endif
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/src/Services/MedicalImaging/AWSSDK.MedicalImaging.NetFramework.csproj b/sdk/src/Services/MedicalImaging/AWSSDK.MedicalImaging.NetFramework.csproj
index d317c0f135da..412fedb36113 100644
--- a/sdk/src/Services/MedicalImaging/AWSSDK.MedicalImaging.NetFramework.csproj
+++ b/sdk/src/Services/MedicalImaging/AWSSDK.MedicalImaging.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);BCL;AWS_ASYNC_API;CODE_ANALYSIS</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(RuleSetFileForBuild)' == 'false' Or '$(RuleSetFileForBuild)' == '' ">
diff --git a/sdk/src/Services/MedicalImaging/AWSSDK.MedicalImaging.NetStandard.csproj b/sdk/src/Services/MedicalImaging/AWSSDK.MedicalImaging.NetStandard.csproj
index aa6b2b125776..7f9a1fdd3a61 100644
--- a/sdk/src/Services/MedicalImaging/AWSSDK.MedicalImaging.NetStandard.csproj
+++ b/sdk/src/Services/MedicalImaging/AWSSDK.MedicalImaging.NetStandard.csproj
@@ -22,6 +22,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <!-- Async Enumerable Compatibility -->
diff --git a/sdk/src/Services/MedicalImaging/Generated/AmazonMedicalImagingConfig.cs b/sdk/src/Services/MedicalImaging/Generated/AmazonMedicalImagingConfig.cs
index fcb37db43ec5..b31e53d6d3be 100644
--- a/sdk/src/Services/MedicalImaging/Generated/AmazonMedicalImagingConfig.cs
+++ b/sdk/src/Services/MedicalImaging/Generated/AmazonMedicalImagingConfig.cs
@@ -34,7 +34,7 @@ namespace Amazon.MedicalImaging
     public partial class AmazonMedicalImagingConfig : ClientConfig
     {
         private static readonly string UserAgentString =
-            InternalSDKUtils.BuildUserAgentString("Medical Imaging", "3.7.301.16");
+            InternalSDKUtils.BuildUserAgentString("Medical Imaging", "4.0.0.0");
 
         private static readonly AmazonMedicalImagingEndpointResolver EndpointResolver =
             new AmazonMedicalImagingEndpointResolver();
diff --git a/sdk/src/Services/MedicalImaging/Properties/AssemblyInfo.cs b/sdk/src/Services/MedicalImaging/Properties/AssemblyInfo.cs
index e8c36a09f8cf..292276f97e9e 100644
--- a/sdk/src/Services/MedicalImaging/Properties/AssemblyInfo.cs
+++ b/sdk/src/Services/MedicalImaging/Properties/AssemblyInfo.cs
@@ -41,5 +41,9 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.301.16")]
\ No newline at end of file
+#if BCL
+[assembly: AssemblyVersion("4.0")]
+#else
+[assembly: AssemblyVersion("4.0.0.0")]
+#endif
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/src/Services/MemoryDB/AWSSDK.MemoryDB.NetFramework.csproj b/sdk/src/Services/MemoryDB/AWSSDK.MemoryDB.NetFramework.csproj
index 627cb80f83f5..55f0739639e1 100644
--- a/sdk/src/Services/MemoryDB/AWSSDK.MemoryDB.NetFramework.csproj
+++ b/sdk/src/Services/MemoryDB/AWSSDK.MemoryDB.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);BCL;AWS_ASYNC_API;CODE_ANALYSIS</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(RuleSetFileForBuild)' == 'false' Or '$(RuleSetFileForBuild)' == '' ">
diff --git a/sdk/src/Services/MemoryDB/AWSSDK.MemoryDB.NetStandard.csproj b/sdk/src/Services/MemoryDB/AWSSDK.MemoryDB.NetStandard.csproj
index e89270c0a3b7..acab9b0613c5 100644
--- a/sdk/src/Services/MemoryDB/AWSSDK.MemoryDB.NetStandard.csproj
+++ b/sdk/src/Services/MemoryDB/AWSSDK.MemoryDB.NetStandard.csproj
@@ -22,6 +22,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <!-- Async Enumerable Compatibility -->
diff --git a/sdk/src/Services/MemoryDB/Generated/AmazonMemoryDBConfig.cs b/sdk/src/Services/MemoryDB/Generated/AmazonMemoryDBConfig.cs
index fb3c7fd28b85..b31d53fd7d43 100644
--- a/sdk/src/Services/MemoryDB/Generated/AmazonMemoryDBConfig.cs
+++ b/sdk/src/Services/MemoryDB/Generated/AmazonMemoryDBConfig.cs
@@ -34,7 +34,7 @@ namespace Amazon.MemoryDB
     public partial class AmazonMemoryDBConfig : ClientConfig
     {
         private static readonly string UserAgentString =
-            InternalSDKUtils.BuildUserAgentString("MemoryDB", "3.7.300.84");
+            InternalSDKUtils.BuildUserAgentString("MemoryDB", "4.0.0.0");
 
         private static readonly AmazonMemoryDBEndpointResolver EndpointResolver =
             new AmazonMemoryDBEndpointResolver();
diff --git a/sdk/src/Services/MemoryDB/Properties/AssemblyInfo.cs b/sdk/src/Services/MemoryDB/Properties/AssemblyInfo.cs
index 5423d223c843..f0fd39f625bc 100644
--- a/sdk/src/Services/MemoryDB/Properties/AssemblyInfo.cs
+++ b/sdk/src/Services/MemoryDB/Properties/AssemblyInfo.cs
@@ -41,5 +41,9 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.300.84")]
\ No newline at end of file
+#if BCL
+[assembly: AssemblyVersion("4.0")]
+#else
+[assembly: AssemblyVersion("4.0.0.0")]
+#endif
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/src/Services/Mgn/AWSSDK.Mgn.NetFramework.csproj b/sdk/src/Services/Mgn/AWSSDK.Mgn.NetFramework.csproj
index f55c7e7f7eb3..c89fee642191 100644
--- a/sdk/src/Services/Mgn/AWSSDK.Mgn.NetFramework.csproj
+++ b/sdk/src/Services/Mgn/AWSSDK.Mgn.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);BCL;AWS_ASYNC_API;CODE_ANALYSIS</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(RuleSetFileForBuild)' == 'false' Or '$(RuleSetFileForBuild)' == '' ">
diff --git a/sdk/src/Services/Mgn/AWSSDK.Mgn.NetStandard.csproj b/sdk/src/Services/Mgn/AWSSDK.Mgn.NetStandard.csproj
index c65a94b8b950..2cee68d20a1b 100644
--- a/sdk/src/Services/Mgn/AWSSDK.Mgn.NetStandard.csproj
+++ b/sdk/src/Services/Mgn/AWSSDK.Mgn.NetStandard.csproj
@@ -22,6 +22,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <!-- Async Enumerable Compatibility -->
diff --git a/sdk/src/Services/Mgn/Generated/AmazonMgnConfig.cs b/sdk/src/Services/Mgn/Generated/AmazonMgnConfig.cs
index 72bcd06ede1f..55f2c363f2a5 100644
--- a/sdk/src/Services/Mgn/Generated/AmazonMgnConfig.cs
+++ b/sdk/src/Services/Mgn/Generated/AmazonMgnConfig.cs
@@ -34,7 +34,7 @@ namespace Amazon.Mgn
     public partial class AmazonMgnConfig : ClientConfig
     {
         private static readonly string UserAgentString =
-            InternalSDKUtils.BuildUserAgentString("mgn", "3.7.302.13");
+            InternalSDKUtils.BuildUserAgentString("mgn", "4.0.0.0");
 
         private static readonly AmazonMgnEndpointResolver EndpointResolver =
             new AmazonMgnEndpointResolver();
diff --git a/sdk/src/Services/Mgn/Properties/AssemblyInfo.cs b/sdk/src/Services/Mgn/Properties/AssemblyInfo.cs
index 26003f188728..54a1487a73c4 100644
--- a/sdk/src/Services/Mgn/Properties/AssemblyInfo.cs
+++ b/sdk/src/Services/Mgn/Properties/AssemblyInfo.cs
@@ -41,5 +41,9 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.302.13")]
\ No newline at end of file
+#if BCL
+[assembly: AssemblyVersion("4.0")]
+#else
+[assembly: AssemblyVersion("4.0.0.0")]
+#endif
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/src/Services/MigrationHub/AWSSDK.MigrationHub.NetFramework.csproj b/sdk/src/Services/MigrationHub/AWSSDK.MigrationHub.NetFramework.csproj
index 25c9c6034a1c..edd6735b3f30 100644
--- a/sdk/src/Services/MigrationHub/AWSSDK.MigrationHub.NetFramework.csproj
+++ b/sdk/src/Services/MigrationHub/AWSSDK.MigrationHub.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);BCL;AWS_ASYNC_API;CODE_ANALYSIS</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(RuleSetFileForBuild)' == 'false' Or '$(RuleSetFileForBuild)' == '' ">
diff --git a/sdk/src/Services/MigrationHub/AWSSDK.MigrationHub.NetStandard.csproj b/sdk/src/Services/MigrationHub/AWSSDK.MigrationHub.NetStandard.csproj
index ad90e959de1e..915f04f07f6e 100644
--- a/sdk/src/Services/MigrationHub/AWSSDK.MigrationHub.NetStandard.csproj
+++ b/sdk/src/Services/MigrationHub/AWSSDK.MigrationHub.NetStandard.csproj
@@ -22,6 +22,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <!-- Async Enumerable Compatibility -->
diff --git a/sdk/src/Services/MigrationHub/Generated/AmazonMigrationHubConfig.cs b/sdk/src/Services/MigrationHub/Generated/AmazonMigrationHubConfig.cs
index c2b3d769db65..865ce7855812 100644
--- a/sdk/src/Services/MigrationHub/Generated/AmazonMigrationHubConfig.cs
+++ b/sdk/src/Services/MigrationHub/Generated/AmazonMigrationHubConfig.cs
@@ -34,7 +34,7 @@ namespace Amazon.MigrationHub
     public partial class AmazonMigrationHubConfig : ClientConfig
     {
         private static readonly string UserAgentString =
-            InternalSDKUtils.BuildUserAgentString("Migration Hub", "3.7.300.84");
+            InternalSDKUtils.BuildUserAgentString("Migration Hub", "4.0.0.0");
 
         private static readonly AmazonMigrationHubEndpointResolver EndpointResolver =
             new AmazonMigrationHubEndpointResolver();
diff --git a/sdk/src/Services/MigrationHub/Properties/AssemblyInfo.cs b/sdk/src/Services/MigrationHub/Properties/AssemblyInfo.cs
index 6a5a79d98ff7..fcea286e07a3 100644
--- a/sdk/src/Services/MigrationHub/Properties/AssemblyInfo.cs
+++ b/sdk/src/Services/MigrationHub/Properties/AssemblyInfo.cs
@@ -41,5 +41,9 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.300.84")]
\ No newline at end of file
+#if BCL
+[assembly: AssemblyVersion("4.0")]
+#else
+[assembly: AssemblyVersion("4.0.0.0")]
+#endif
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/src/Services/MigrationHubConfig/AWSSDK.MigrationHubConfig.NetFramework.csproj b/sdk/src/Services/MigrationHubConfig/AWSSDK.MigrationHubConfig.NetFramework.csproj
index 126383f6334f..0d7284f16834 100644
--- a/sdk/src/Services/MigrationHubConfig/AWSSDK.MigrationHubConfig.NetFramework.csproj
+++ b/sdk/src/Services/MigrationHubConfig/AWSSDK.MigrationHubConfig.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);BCL;AWS_ASYNC_API;CODE_ANALYSIS</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(RuleSetFileForBuild)' == 'false' Or '$(RuleSetFileForBuild)' == '' ">
diff --git a/sdk/src/Services/MigrationHubConfig/AWSSDK.MigrationHubConfig.NetStandard.csproj b/sdk/src/Services/MigrationHubConfig/AWSSDK.MigrationHubConfig.NetStandard.csproj
index 6db48a363276..d8593638784c 100644
--- a/sdk/src/Services/MigrationHubConfig/AWSSDK.MigrationHubConfig.NetStandard.csproj
+++ b/sdk/src/Services/MigrationHubConfig/AWSSDK.MigrationHubConfig.NetStandard.csproj
@@ -22,6 +22,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <!-- Async Enumerable Compatibility -->
diff --git a/sdk/src/Services/MigrationHubConfig/Generated/AmazonMigrationHubConfigConfig.cs b/sdk/src/Services/MigrationHubConfig/Generated/AmazonMigrationHubConfigConfig.cs
index 3161124a3274..dccad28361f1 100644
--- a/sdk/src/Services/MigrationHubConfig/Generated/AmazonMigrationHubConfigConfig.cs
+++ b/sdk/src/Services/MigrationHubConfig/Generated/AmazonMigrationHubConfigConfig.cs
@@ -34,7 +34,7 @@ namespace Amazon.MigrationHubConfig
     public partial class AmazonMigrationHubConfigConfig : ClientConfig
     {
         private static readonly string UserAgentString =
-            InternalSDKUtils.BuildUserAgentString("MigrationHub Config", "3.7.300.84");
+            InternalSDKUtils.BuildUserAgentString("MigrationHub Config", "4.0.0.0");
 
         private static readonly AmazonMigrationHubConfigEndpointResolver EndpointResolver =
             new AmazonMigrationHubConfigEndpointResolver();
diff --git a/sdk/src/Services/MigrationHubConfig/Properties/AssemblyInfo.cs b/sdk/src/Services/MigrationHubConfig/Properties/AssemblyInfo.cs
index 4508181a7176..c38043f4c477 100644
--- a/sdk/src/Services/MigrationHubConfig/Properties/AssemblyInfo.cs
+++ b/sdk/src/Services/MigrationHubConfig/Properties/AssemblyInfo.cs
@@ -41,5 +41,9 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.300.84")]
\ No newline at end of file
+#if BCL
+[assembly: AssemblyVersion("4.0")]
+#else
+[assembly: AssemblyVersion("4.0.0.0")]
+#endif
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/src/Services/MigrationHubOrchestrator/AWSSDK.MigrationHubOrchestrator.NetFramework.csproj b/sdk/src/Services/MigrationHubOrchestrator/AWSSDK.MigrationHubOrchestrator.NetFramework.csproj
index 56b40e87f61a..a4a1ce47b3e0 100644
--- a/sdk/src/Services/MigrationHubOrchestrator/AWSSDK.MigrationHubOrchestrator.NetFramework.csproj
+++ b/sdk/src/Services/MigrationHubOrchestrator/AWSSDK.MigrationHubOrchestrator.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);BCL;AWS_ASYNC_API;CODE_ANALYSIS</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(RuleSetFileForBuild)' == 'false' Or '$(RuleSetFileForBuild)' == '' ">
diff --git a/sdk/src/Services/MigrationHubOrchestrator/AWSSDK.MigrationHubOrchestrator.NetStandard.csproj b/sdk/src/Services/MigrationHubOrchestrator/AWSSDK.MigrationHubOrchestrator.NetStandard.csproj
index 092eb0e37afa..652a7eb13888 100644
--- a/sdk/src/Services/MigrationHubOrchestrator/AWSSDK.MigrationHubOrchestrator.NetStandard.csproj
+++ b/sdk/src/Services/MigrationHubOrchestrator/AWSSDK.MigrationHubOrchestrator.NetStandard.csproj
@@ -22,6 +22,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <!-- Async Enumerable Compatibility -->
diff --git a/sdk/src/Services/MigrationHubOrchestrator/Generated/AmazonMigrationHubOrchestratorConfig.cs b/sdk/src/Services/MigrationHubOrchestrator/Generated/AmazonMigrationHubOrchestratorConfig.cs
index 5e80109b98a6..84565c8869bb 100644
--- a/sdk/src/Services/MigrationHubOrchestrator/Generated/AmazonMigrationHubOrchestratorConfig.cs
+++ b/sdk/src/Services/MigrationHubOrchestrator/Generated/AmazonMigrationHubOrchestratorConfig.cs
@@ -34,7 +34,7 @@ namespace Amazon.MigrationHubOrchestrator
     public partial class AmazonMigrationHubOrchestratorConfig : ClientConfig
     {
         private static readonly string UserAgentString =
-            InternalSDKUtils.BuildUserAgentString("MigrationHubOrchestrator", "3.7.301.30");
+            InternalSDKUtils.BuildUserAgentString("MigrationHubOrchestrator", "4.0.0.0");
 
         private static readonly AmazonMigrationHubOrchestratorEndpointResolver EndpointResolver =
             new AmazonMigrationHubOrchestratorEndpointResolver();
diff --git a/sdk/src/Services/MigrationHubOrchestrator/Properties/AssemblyInfo.cs b/sdk/src/Services/MigrationHubOrchestrator/Properties/AssemblyInfo.cs
index c44b64bffc81..12b01260ec06 100644
--- a/sdk/src/Services/MigrationHubOrchestrator/Properties/AssemblyInfo.cs
+++ b/sdk/src/Services/MigrationHubOrchestrator/Properties/AssemblyInfo.cs
@@ -41,5 +41,9 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.301.30")]
\ No newline at end of file
+#if BCL
+[assembly: AssemblyVersion("4.0")]
+#else
+[assembly: AssemblyVersion("4.0.0.0")]
+#endif
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/src/Services/MigrationHubRefactorSpaces/AWSSDK.MigrationHubRefactorSpaces.NetFramework.csproj b/sdk/src/Services/MigrationHubRefactorSpaces/AWSSDK.MigrationHubRefactorSpaces.NetFramework.csproj
index 941e4de00fc6..4f9c996363ce 100644
--- a/sdk/src/Services/MigrationHubRefactorSpaces/AWSSDK.MigrationHubRefactorSpaces.NetFramework.csproj
+++ b/sdk/src/Services/MigrationHubRefactorSpaces/AWSSDK.MigrationHubRefactorSpaces.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);BCL;AWS_ASYNC_API;CODE_ANALYSIS</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(RuleSetFileForBuild)' == 'false' Or '$(RuleSetFileForBuild)' == '' ">
diff --git a/sdk/src/Services/MigrationHubRefactorSpaces/AWSSDK.MigrationHubRefactorSpaces.NetStandard.csproj b/sdk/src/Services/MigrationHubRefactorSpaces/AWSSDK.MigrationHubRefactorSpaces.NetStandard.csproj
index e2866812be66..c22868e18a10 100644
--- a/sdk/src/Services/MigrationHubRefactorSpaces/AWSSDK.MigrationHubRefactorSpaces.NetStandard.csproj
+++ b/sdk/src/Services/MigrationHubRefactorSpaces/AWSSDK.MigrationHubRefactorSpaces.NetStandard.csproj
@@ -22,6 +22,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <!-- Async Enumerable Compatibility -->
diff --git a/sdk/src/Services/MigrationHubRefactorSpaces/Generated/AmazonMigrationHubRefactorSpacesConfig.cs b/sdk/src/Services/MigrationHubRefactorSpaces/Generated/AmazonMigrationHubRefactorSpacesConfig.cs
index e2f86cd946fc..906da1246f2a 100644
--- a/sdk/src/Services/MigrationHubRefactorSpaces/Generated/AmazonMigrationHubRefactorSpacesConfig.cs
+++ b/sdk/src/Services/MigrationHubRefactorSpaces/Generated/AmazonMigrationHubRefactorSpacesConfig.cs
@@ -34,7 +34,7 @@ namespace Amazon.MigrationHubRefactorSpaces
     public partial class AmazonMigrationHubRefactorSpacesConfig : ClientConfig
     {
         private static readonly string UserAgentString =
-            InternalSDKUtils.BuildUserAgentString("Migration Hub Refactor Spaces", "3.7.300.84");
+            InternalSDKUtils.BuildUserAgentString("Migration Hub Refactor Spaces", "4.0.0.0");
 
         private static readonly AmazonMigrationHubRefactorSpacesEndpointResolver EndpointResolver =
             new AmazonMigrationHubRefactorSpacesEndpointResolver();
diff --git a/sdk/src/Services/MigrationHubRefactorSpaces/Properties/AssemblyInfo.cs b/sdk/src/Services/MigrationHubRefactorSpaces/Properties/AssemblyInfo.cs
index d6a30d1bb315..93640d18293a 100644
--- a/sdk/src/Services/MigrationHubRefactorSpaces/Properties/AssemblyInfo.cs
+++ b/sdk/src/Services/MigrationHubRefactorSpaces/Properties/AssemblyInfo.cs
@@ -41,5 +41,9 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.300.84")]
\ No newline at end of file
+#if BCL
+[assembly: AssemblyVersion("4.0")]
+#else
+[assembly: AssemblyVersion("4.0.0.0")]
+#endif
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/src/Services/MigrationHubStrategyRecommendations/AWSSDK.MigrationHubStrategyRecommendations.NetFramework.csproj b/sdk/src/Services/MigrationHubStrategyRecommendations/AWSSDK.MigrationHubStrategyRecommendations.NetFramework.csproj
index 8a302784b5db..3e70ec0e3f61 100644
--- a/sdk/src/Services/MigrationHubStrategyRecommendations/AWSSDK.MigrationHubStrategyRecommendations.NetFramework.csproj
+++ b/sdk/src/Services/MigrationHubStrategyRecommendations/AWSSDK.MigrationHubStrategyRecommendations.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);BCL;AWS_ASYNC_API;CODE_ANALYSIS</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(RuleSetFileForBuild)' == 'false' Or '$(RuleSetFileForBuild)' == '' ">
diff --git a/sdk/src/Services/MigrationHubStrategyRecommendations/AWSSDK.MigrationHubStrategyRecommendations.NetStandard.csproj b/sdk/src/Services/MigrationHubStrategyRecommendations/AWSSDK.MigrationHubStrategyRecommendations.NetStandard.csproj
index 642735ab0733..e3e49b38b0c2 100644
--- a/sdk/src/Services/MigrationHubStrategyRecommendations/AWSSDK.MigrationHubStrategyRecommendations.NetStandard.csproj
+++ b/sdk/src/Services/MigrationHubStrategyRecommendations/AWSSDK.MigrationHubStrategyRecommendations.NetStandard.csproj
@@ -22,6 +22,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <!-- Async Enumerable Compatibility -->
diff --git a/sdk/src/Services/MigrationHubStrategyRecommendations/Generated/AmazonMigrationHubStrategyRecommendationsConfig.cs b/sdk/src/Services/MigrationHubStrategyRecommendations/Generated/AmazonMigrationHubStrategyRecommendationsConfig.cs
index 22ca1b656946..026c7edd19c7 100644
--- a/sdk/src/Services/MigrationHubStrategyRecommendations/Generated/AmazonMigrationHubStrategyRecommendationsConfig.cs
+++ b/sdk/src/Services/MigrationHubStrategyRecommendations/Generated/AmazonMigrationHubStrategyRecommendationsConfig.cs
@@ -34,7 +34,7 @@ namespace Amazon.MigrationHubStrategyRecommendations
     public partial class AmazonMigrationHubStrategyRecommendationsConfig : ClientConfig
     {
         private static readonly string UserAgentString =
-            InternalSDKUtils.BuildUserAgentString("MigrationHubStrategy", "3.7.300.84");
+            InternalSDKUtils.BuildUserAgentString("MigrationHubStrategy", "4.0.0.0");
 
         private static readonly AmazonMigrationHubStrategyRecommendationsEndpointResolver EndpointResolver =
             new AmazonMigrationHubStrategyRecommendationsEndpointResolver();
diff --git a/sdk/src/Services/MigrationHubStrategyRecommendations/Properties/AssemblyInfo.cs b/sdk/src/Services/MigrationHubStrategyRecommendations/Properties/AssemblyInfo.cs
index 6ae1116960bb..88baec4fc071 100644
--- a/sdk/src/Services/MigrationHubStrategyRecommendations/Properties/AssemblyInfo.cs
+++ b/sdk/src/Services/MigrationHubStrategyRecommendations/Properties/AssemblyInfo.cs
@@ -41,5 +41,9 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.300.84")]
\ No newline at end of file
+#if BCL
+[assembly: AssemblyVersion("4.0")]
+#else
+[assembly: AssemblyVersion("4.0.0.0")]
+#endif
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/src/Services/Mobile/AWSSDK.Mobile.NetFramework.csproj b/sdk/src/Services/Mobile/AWSSDK.Mobile.NetFramework.csproj
index 7147d3e9224a..6013cf6a06bf 100644
--- a/sdk/src/Services/Mobile/AWSSDK.Mobile.NetFramework.csproj
+++ b/sdk/src/Services/Mobile/AWSSDK.Mobile.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);BCL;AWS_ASYNC_API;CODE_ANALYSIS</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(RuleSetFileForBuild)' == 'false' Or '$(RuleSetFileForBuild)' == '' ">
diff --git a/sdk/src/Services/Mobile/AWSSDK.Mobile.NetStandard.csproj b/sdk/src/Services/Mobile/AWSSDK.Mobile.NetStandard.csproj
index 6555d807905f..261745738ecc 100644
--- a/sdk/src/Services/Mobile/AWSSDK.Mobile.NetStandard.csproj
+++ b/sdk/src/Services/Mobile/AWSSDK.Mobile.NetStandard.csproj
@@ -22,6 +22,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <!-- Async Enumerable Compatibility -->
diff --git a/sdk/src/Services/Mobile/Generated/AmazonMobileConfig.cs b/sdk/src/Services/Mobile/Generated/AmazonMobileConfig.cs
index cb429bad05d6..ea6ae32aac69 100644
--- a/sdk/src/Services/Mobile/Generated/AmazonMobileConfig.cs
+++ b/sdk/src/Services/Mobile/Generated/AmazonMobileConfig.cs
@@ -34,7 +34,7 @@ namespace Amazon.Mobile
     public partial class AmazonMobileConfig : ClientConfig
     {
         private static readonly string UserAgentString =
-            InternalSDKUtils.BuildUserAgentString("Mobile", "3.7.300.84");
+            InternalSDKUtils.BuildUserAgentString("Mobile", "4.0.0.0");
 
         private static readonly AmazonMobileEndpointResolver EndpointResolver =
             new AmazonMobileEndpointResolver();
diff --git a/sdk/src/Services/Mobile/Properties/AssemblyInfo.cs b/sdk/src/Services/Mobile/Properties/AssemblyInfo.cs
index b82630c3f880..77a006569f84 100644
--- a/sdk/src/Services/Mobile/Properties/AssemblyInfo.cs
+++ b/sdk/src/Services/Mobile/Properties/AssemblyInfo.cs
@@ -41,5 +41,9 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.300.84")]
\ No newline at end of file
+#if BCL
+[assembly: AssemblyVersion("4.0")]
+#else
+[assembly: AssemblyVersion("4.0.0.0")]
+#endif
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/src/Services/MobileAnalytics/AWSSDK.MobileAnalytics.NetFramework.csproj b/sdk/src/Services/MobileAnalytics/AWSSDK.MobileAnalytics.NetFramework.csproj
index 0072df66c614..d17fe305e358 100644
--- a/sdk/src/Services/MobileAnalytics/AWSSDK.MobileAnalytics.NetFramework.csproj
+++ b/sdk/src/Services/MobileAnalytics/AWSSDK.MobileAnalytics.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);BCL;AWS_ASYNC_API;CODE_ANALYSIS</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(RuleSetFileForBuild)' == 'false' Or '$(RuleSetFileForBuild)' == '' ">
diff --git a/sdk/src/Services/MobileAnalytics/Generated/AmazonMobileAnalyticsConfig.cs b/sdk/src/Services/MobileAnalytics/Generated/AmazonMobileAnalyticsConfig.cs
index 318b86245335..f5c28af019e7 100644
--- a/sdk/src/Services/MobileAnalytics/Generated/AmazonMobileAnalyticsConfig.cs
+++ b/sdk/src/Services/MobileAnalytics/Generated/AmazonMobileAnalyticsConfig.cs
@@ -34,7 +34,7 @@ namespace Amazon.MobileAnalytics
     public partial class AmazonMobileAnalyticsConfig : ClientConfig
     {
         private static readonly string UserAgentString =
-            InternalSDKUtils.BuildUserAgentString("Mobile Analytics", "3.7.300.84");
+            InternalSDKUtils.BuildUserAgentString("Mobile Analytics", "4.0.0.0");
 
         private static readonly AmazonMobileAnalyticsEndpointResolver EndpointResolver =
             new AmazonMobileAnalyticsEndpointResolver();
diff --git a/sdk/src/Services/MobileAnalytics/Properties/AssemblyInfo.cs b/sdk/src/Services/MobileAnalytics/Properties/AssemblyInfo.cs
index 90b2a365e304..b01c4fc80947 100644
--- a/sdk/src/Services/MobileAnalytics/Properties/AssemblyInfo.cs
+++ b/sdk/src/Services/MobileAnalytics/Properties/AssemblyInfo.cs
@@ -41,5 +41,9 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.300.84")]
\ No newline at end of file
+#if BCL
+[assembly: AssemblyVersion("4.0")]
+#else
+[assembly: AssemblyVersion("4.0.0.0")]
+#endif
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/src/Services/Neptune/AWSSDK.Neptune.NetFramework.csproj b/sdk/src/Services/Neptune/AWSSDK.Neptune.NetFramework.csproj
index da8ec9ef3ed8..949336139003 100644
--- a/sdk/src/Services/Neptune/AWSSDK.Neptune.NetFramework.csproj
+++ b/sdk/src/Services/Neptune/AWSSDK.Neptune.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);BCL;AWS_ASYNC_API;CODE_ANALYSIS</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(RuleSetFileForBuild)' == 'false' Or '$(RuleSetFileForBuild)' == '' ">
diff --git a/sdk/src/Services/Neptune/AWSSDK.Neptune.NetStandard.csproj b/sdk/src/Services/Neptune/AWSSDK.Neptune.NetStandard.csproj
index 1f30fd638c63..27d21bb9d4b6 100644
--- a/sdk/src/Services/Neptune/AWSSDK.Neptune.NetStandard.csproj
+++ b/sdk/src/Services/Neptune/AWSSDK.Neptune.NetStandard.csproj
@@ -22,6 +22,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <!-- Async Enumerable Compatibility -->
diff --git a/sdk/src/Services/Neptune/Generated/AmazonNeptuneConfig.cs b/sdk/src/Services/Neptune/Generated/AmazonNeptuneConfig.cs
index 432ded18e7f0..03341b7bc72f 100644
--- a/sdk/src/Services/Neptune/Generated/AmazonNeptuneConfig.cs
+++ b/sdk/src/Services/Neptune/Generated/AmazonNeptuneConfig.cs
@@ -34,7 +34,7 @@ namespace Amazon.Neptune
     public partial class AmazonNeptuneConfig : ClientConfig
     {
         private static readonly string UserAgentString =
-            InternalSDKUtils.BuildUserAgentString("Neptune", "3.7.301.68");
+            InternalSDKUtils.BuildUserAgentString("Neptune", "4.0.0.0");
 
         private static readonly AmazonNeptuneEndpointResolver EndpointResolver =
             new AmazonNeptuneEndpointResolver();
diff --git a/sdk/src/Services/Neptune/Properties/AssemblyInfo.cs b/sdk/src/Services/Neptune/Properties/AssemblyInfo.cs
index a9f19711d251..c5218759787f 100644
--- a/sdk/src/Services/Neptune/Properties/AssemblyInfo.cs
+++ b/sdk/src/Services/Neptune/Properties/AssemblyInfo.cs
@@ -41,5 +41,9 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.301.68")]
\ No newline at end of file
+#if BCL
+[assembly: AssemblyVersion("4.0")]
+#else
+[assembly: AssemblyVersion("4.0.0.0")]
+#endif
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/src/Services/NeptuneGraph/AWSSDK.NeptuneGraph.NetFramework.csproj b/sdk/src/Services/NeptuneGraph/AWSSDK.NeptuneGraph.NetFramework.csproj
index 1ce13148778f..f2f8bd65216c 100644
--- a/sdk/src/Services/NeptuneGraph/AWSSDK.NeptuneGraph.NetFramework.csproj
+++ b/sdk/src/Services/NeptuneGraph/AWSSDK.NeptuneGraph.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);BCL;AWS_ASYNC_API;CODE_ANALYSIS</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(RuleSetFileForBuild)' == 'false' Or '$(RuleSetFileForBuild)' == '' ">
diff --git a/sdk/src/Services/NeptuneGraph/AWSSDK.NeptuneGraph.NetStandard.csproj b/sdk/src/Services/NeptuneGraph/AWSSDK.NeptuneGraph.NetStandard.csproj
index c3023feb8f76..ee11580fc3d2 100644
--- a/sdk/src/Services/NeptuneGraph/AWSSDK.NeptuneGraph.NetStandard.csproj
+++ b/sdk/src/Services/NeptuneGraph/AWSSDK.NeptuneGraph.NetStandard.csproj
@@ -22,6 +22,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <!-- Async Enumerable Compatibility -->
diff --git a/sdk/src/Services/NeptuneGraph/Generated/AmazonNeptuneGraphConfig.cs b/sdk/src/Services/NeptuneGraph/Generated/AmazonNeptuneGraphConfig.cs
index 55fd5c51994c..25d79391f108 100644
--- a/sdk/src/Services/NeptuneGraph/Generated/AmazonNeptuneGraphConfig.cs
+++ b/sdk/src/Services/NeptuneGraph/Generated/AmazonNeptuneGraphConfig.cs
@@ -34,7 +34,7 @@ namespace Amazon.NeptuneGraph
     public partial class AmazonNeptuneGraphConfig : ClientConfig
     {
         private static readonly string UserAgentString =
-            InternalSDKUtils.BuildUserAgentString("Neptune Graph", "3.7.305.20");
+            InternalSDKUtils.BuildUserAgentString("Neptune Graph", "4.0.0.0");
 
         private static readonly AmazonNeptuneGraphEndpointResolver EndpointResolver =
             new AmazonNeptuneGraphEndpointResolver();
diff --git a/sdk/src/Services/NeptuneGraph/Properties/AssemblyInfo.cs b/sdk/src/Services/NeptuneGraph/Properties/AssemblyInfo.cs
index ba23804187fb..0496e9392334 100644
--- a/sdk/src/Services/NeptuneGraph/Properties/AssemblyInfo.cs
+++ b/sdk/src/Services/NeptuneGraph/Properties/AssemblyInfo.cs
@@ -41,5 +41,9 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.305.20")]
\ No newline at end of file
+#if BCL
+[assembly: AssemblyVersion("4.0")]
+#else
+[assembly: AssemblyVersion("4.0.0.0")]
+#endif
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/src/Services/Neptunedata/AWSSDK.Neptunedata.NetFramework.csproj b/sdk/src/Services/Neptunedata/AWSSDK.Neptunedata.NetFramework.csproj
index a6e647c82533..9f342ff312d8 100644
--- a/sdk/src/Services/Neptunedata/AWSSDK.Neptunedata.NetFramework.csproj
+++ b/sdk/src/Services/Neptunedata/AWSSDK.Neptunedata.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);BCL;AWS_ASYNC_API;CODE_ANALYSIS</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(RuleSetFileForBuild)' == 'false' Or '$(RuleSetFileForBuild)' == '' ">
diff --git a/sdk/src/Services/Neptunedata/AWSSDK.Neptunedata.NetStandard.csproj b/sdk/src/Services/Neptunedata/AWSSDK.Neptunedata.NetStandard.csproj
index b04f831be7cc..41fe8a37835b 100644
--- a/sdk/src/Services/Neptunedata/AWSSDK.Neptunedata.NetStandard.csproj
+++ b/sdk/src/Services/Neptunedata/AWSSDK.Neptunedata.NetStandard.csproj
@@ -22,6 +22,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <!-- Async Enumerable Compatibility -->
diff --git a/sdk/src/Services/Neptunedata/Generated/AmazonNeptunedataConfig.cs b/sdk/src/Services/Neptunedata/Generated/AmazonNeptunedataConfig.cs
index 2bec9f59e1a7..b822bb9ce9cd 100644
--- a/sdk/src/Services/Neptunedata/Generated/AmazonNeptunedataConfig.cs
+++ b/sdk/src/Services/Neptunedata/Generated/AmazonNeptunedataConfig.cs
@@ -34,7 +34,7 @@ namespace Amazon.Neptunedata
     public partial class AmazonNeptunedataConfig : ClientConfig
     {
         private static readonly string UserAgentString =
-            InternalSDKUtils.BuildUserAgentString("neptunedata", "3.7.300.84");
+            InternalSDKUtils.BuildUserAgentString("neptunedata", "4.0.0.0");
 
         private static readonly AmazonNeptunedataEndpointResolver EndpointResolver =
             new AmazonNeptunedataEndpointResolver();
diff --git a/sdk/src/Services/Neptunedata/Properties/AssemblyInfo.cs b/sdk/src/Services/Neptunedata/Properties/AssemblyInfo.cs
index 00f05ea3aa56..183a42abc382 100644
--- a/sdk/src/Services/Neptunedata/Properties/AssemblyInfo.cs
+++ b/sdk/src/Services/Neptunedata/Properties/AssemblyInfo.cs
@@ -41,5 +41,9 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.300.84")]
\ No newline at end of file
+#if BCL
+[assembly: AssemblyVersion("4.0")]
+#else
+[assembly: AssemblyVersion("4.0.0.0")]
+#endif
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/src/Services/NetworkFirewall/AWSSDK.NetworkFirewall.NetFramework.csproj b/sdk/src/Services/NetworkFirewall/AWSSDK.NetworkFirewall.NetFramework.csproj
index 941bb407167e..e23a6b5741ef 100644
--- a/sdk/src/Services/NetworkFirewall/AWSSDK.NetworkFirewall.NetFramework.csproj
+++ b/sdk/src/Services/NetworkFirewall/AWSSDK.NetworkFirewall.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);BCL;AWS_ASYNC_API;CODE_ANALYSIS</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(RuleSetFileForBuild)' == 'false' Or '$(RuleSetFileForBuild)' == '' ">
diff --git a/sdk/src/Services/NetworkFirewall/AWSSDK.NetworkFirewall.NetStandard.csproj b/sdk/src/Services/NetworkFirewall/AWSSDK.NetworkFirewall.NetStandard.csproj
index 56cb71c7b394..39d8164d0c17 100644
--- a/sdk/src/Services/NetworkFirewall/AWSSDK.NetworkFirewall.NetStandard.csproj
+++ b/sdk/src/Services/NetworkFirewall/AWSSDK.NetworkFirewall.NetStandard.csproj
@@ -22,6 +22,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <!-- Async Enumerable Compatibility -->
diff --git a/sdk/src/Services/NetworkFirewall/Generated/AmazonNetworkFirewallConfig.cs b/sdk/src/Services/NetworkFirewall/Generated/AmazonNetworkFirewallConfig.cs
index 7876c0d5ebd3..7ac2b8d6b022 100644
--- a/sdk/src/Services/NetworkFirewall/Generated/AmazonNetworkFirewallConfig.cs
+++ b/sdk/src/Services/NetworkFirewall/Generated/AmazonNetworkFirewallConfig.cs
@@ -34,7 +34,7 @@ namespace Amazon.NetworkFirewall
     public partial class AmazonNetworkFirewallConfig : ClientConfig
     {
         private static readonly string UserAgentString =
-            InternalSDKUtils.BuildUserAgentString("Network Firewall", "3.7.300.84");
+            InternalSDKUtils.BuildUserAgentString("Network Firewall", "4.0.0.0");
 
         private static readonly AmazonNetworkFirewallEndpointResolver EndpointResolver =
             new AmazonNetworkFirewallEndpointResolver();
diff --git a/sdk/src/Services/NetworkFirewall/Properties/AssemblyInfo.cs b/sdk/src/Services/NetworkFirewall/Properties/AssemblyInfo.cs
index cc10f34396c7..d730681c54ca 100644
--- a/sdk/src/Services/NetworkFirewall/Properties/AssemblyInfo.cs
+++ b/sdk/src/Services/NetworkFirewall/Properties/AssemblyInfo.cs
@@ -41,5 +41,9 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.300.84")]
\ No newline at end of file
+#if BCL
+[assembly: AssemblyVersion("4.0")]
+#else
+[assembly: AssemblyVersion("4.0.0.0")]
+#endif
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/src/Services/NetworkManager/AWSSDK.NetworkManager.NetFramework.csproj b/sdk/src/Services/NetworkManager/AWSSDK.NetworkManager.NetFramework.csproj
index 2a854ea794fb..3991c48ba214 100644
--- a/sdk/src/Services/NetworkManager/AWSSDK.NetworkManager.NetFramework.csproj
+++ b/sdk/src/Services/NetworkManager/AWSSDK.NetworkManager.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);BCL;AWS_ASYNC_API;CODE_ANALYSIS</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(RuleSetFileForBuild)' == 'false' Or '$(RuleSetFileForBuild)' == '' ">
diff --git a/sdk/src/Services/NetworkManager/AWSSDK.NetworkManager.NetStandard.csproj b/sdk/src/Services/NetworkManager/AWSSDK.NetworkManager.NetStandard.csproj
index 820568592dc2..a79ee133a03b 100644
--- a/sdk/src/Services/NetworkManager/AWSSDK.NetworkManager.NetStandard.csproj
+++ b/sdk/src/Services/NetworkManager/AWSSDK.NetworkManager.NetStandard.csproj
@@ -22,6 +22,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <!-- Async Enumerable Compatibility -->
diff --git a/sdk/src/Services/NetworkManager/Generated/AmazonNetworkManagerConfig.cs b/sdk/src/Services/NetworkManager/Generated/AmazonNetworkManagerConfig.cs
index 7d54cbfc4947..827fe5c79baf 100644
--- a/sdk/src/Services/NetworkManager/Generated/AmazonNetworkManagerConfig.cs
+++ b/sdk/src/Services/NetworkManager/Generated/AmazonNetworkManagerConfig.cs
@@ -34,7 +34,7 @@ namespace Amazon.NetworkManager
     public partial class AmazonNetworkManagerConfig : ClientConfig
     {
         private static readonly string UserAgentString =
-            InternalSDKUtils.BuildUserAgentString("NetworkManager", "3.7.300.84");
+            InternalSDKUtils.BuildUserAgentString("NetworkManager", "4.0.0.0");
 
         private static readonly AmazonNetworkManagerEndpointResolver EndpointResolver =
             new AmazonNetworkManagerEndpointResolver();
diff --git a/sdk/src/Services/NetworkManager/Properties/AssemblyInfo.cs b/sdk/src/Services/NetworkManager/Properties/AssemblyInfo.cs
index cd1428393749..4d6ced2c9e67 100644
--- a/sdk/src/Services/NetworkManager/Properties/AssemblyInfo.cs
+++ b/sdk/src/Services/NetworkManager/Properties/AssemblyInfo.cs
@@ -41,5 +41,9 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.300.84")]
\ No newline at end of file
+#if BCL
+[assembly: AssemblyVersion("4.0")]
+#else
+[assembly: AssemblyVersion("4.0.0.0")]
+#endif
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/src/Services/NetworkMonitor/AWSSDK.NetworkMonitor.NetFramework.csproj b/sdk/src/Services/NetworkMonitor/AWSSDK.NetworkMonitor.NetFramework.csproj
index 364cd071115b..87178c725a7b 100644
--- a/sdk/src/Services/NetworkMonitor/AWSSDK.NetworkMonitor.NetFramework.csproj
+++ b/sdk/src/Services/NetworkMonitor/AWSSDK.NetworkMonitor.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);BCL;AWS_ASYNC_API;CODE_ANALYSIS</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(RuleSetFileForBuild)' == 'false' Or '$(RuleSetFileForBuild)' == '' ">
diff --git a/sdk/src/Services/NetworkMonitor/AWSSDK.NetworkMonitor.NetStandard.csproj b/sdk/src/Services/NetworkMonitor/AWSSDK.NetworkMonitor.NetStandard.csproj
index a255247df198..4b657a3fd5db 100644
--- a/sdk/src/Services/NetworkMonitor/AWSSDK.NetworkMonitor.NetStandard.csproj
+++ b/sdk/src/Services/NetworkMonitor/AWSSDK.NetworkMonitor.NetStandard.csproj
@@ -22,6 +22,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <!-- Async Enumerable Compatibility -->
diff --git a/sdk/src/Services/NetworkMonitor/Generated/AmazonNetworkMonitorConfig.cs b/sdk/src/Services/NetworkMonitor/Generated/AmazonNetworkMonitorConfig.cs
index ee88db132cd0..8e318d71b184 100644
--- a/sdk/src/Services/NetworkMonitor/Generated/AmazonNetworkMonitorConfig.cs
+++ b/sdk/src/Services/NetworkMonitor/Generated/AmazonNetworkMonitorConfig.cs
@@ -34,7 +34,7 @@ namespace Amazon.NetworkMonitor
     public partial class AmazonNetworkMonitorConfig : ClientConfig
     {
         private static readonly string UserAgentString =
-            InternalSDKUtils.BuildUserAgentString("NetworkMonitor", "3.7.301.13");
+            InternalSDKUtils.BuildUserAgentString("NetworkMonitor", "4.0.0.0");
 
         private static readonly AmazonNetworkMonitorEndpointResolver EndpointResolver =
             new AmazonNetworkMonitorEndpointResolver();
diff --git a/sdk/src/Services/NetworkMonitor/Properties/AssemblyInfo.cs b/sdk/src/Services/NetworkMonitor/Properties/AssemblyInfo.cs
index 38afae57ea61..6a6ede1266fb 100644
--- a/sdk/src/Services/NetworkMonitor/Properties/AssemblyInfo.cs
+++ b/sdk/src/Services/NetworkMonitor/Properties/AssemblyInfo.cs
@@ -41,5 +41,9 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.301.13")]
\ No newline at end of file
+#if BCL
+[assembly: AssemblyVersion("4.0")]
+#else
+[assembly: AssemblyVersion("4.0.0.0")]
+#endif
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/src/Services/NimbleStudio/AWSSDK.NimbleStudio.NetFramework.csproj b/sdk/src/Services/NimbleStudio/AWSSDK.NimbleStudio.NetFramework.csproj
index 8fc42bd8b6c9..d5b8c59e7caf 100644
--- a/sdk/src/Services/NimbleStudio/AWSSDK.NimbleStudio.NetFramework.csproj
+++ b/sdk/src/Services/NimbleStudio/AWSSDK.NimbleStudio.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);BCL;AWS_ASYNC_API;CODE_ANALYSIS</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(RuleSetFileForBuild)' == 'false' Or '$(RuleSetFileForBuild)' == '' ">
diff --git a/sdk/src/Services/NimbleStudio/AWSSDK.NimbleStudio.NetStandard.csproj b/sdk/src/Services/NimbleStudio/AWSSDK.NimbleStudio.NetStandard.csproj
index 2570a64cd9c1..ef39952a8061 100644
--- a/sdk/src/Services/NimbleStudio/AWSSDK.NimbleStudio.NetStandard.csproj
+++ b/sdk/src/Services/NimbleStudio/AWSSDK.NimbleStudio.NetStandard.csproj
@@ -22,6 +22,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <!-- Async Enumerable Compatibility -->
diff --git a/sdk/src/Services/NimbleStudio/Generated/AmazonNimbleStudioConfig.cs b/sdk/src/Services/NimbleStudio/Generated/AmazonNimbleStudioConfig.cs
index 60b0eb071f3a..52a9ef8d1066 100644
--- a/sdk/src/Services/NimbleStudio/Generated/AmazonNimbleStudioConfig.cs
+++ b/sdk/src/Services/NimbleStudio/Generated/AmazonNimbleStudioConfig.cs
@@ -34,7 +34,7 @@ namespace Amazon.NimbleStudio
     public partial class AmazonNimbleStudioConfig : ClientConfig
     {
         private static readonly string UserAgentString =
-            InternalSDKUtils.BuildUserAgentString("nimble", "3.7.300.84");
+            InternalSDKUtils.BuildUserAgentString("nimble", "4.0.0.0");
 
         private static readonly AmazonNimbleStudioEndpointResolver EndpointResolver =
             new AmazonNimbleStudioEndpointResolver();
diff --git a/sdk/src/Services/NimbleStudio/Properties/AssemblyInfo.cs b/sdk/src/Services/NimbleStudio/Properties/AssemblyInfo.cs
index 9c3946fd1b17..a9e1edea66fa 100644
--- a/sdk/src/Services/NimbleStudio/Properties/AssemblyInfo.cs
+++ b/sdk/src/Services/NimbleStudio/Properties/AssemblyInfo.cs
@@ -41,5 +41,9 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.300.84")]
\ No newline at end of file
+#if BCL
+[assembly: AssemblyVersion("4.0")]
+#else
+[assembly: AssemblyVersion("4.0.0.0")]
+#endif
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/src/Services/OAM/AWSSDK.OAM.NetFramework.csproj b/sdk/src/Services/OAM/AWSSDK.OAM.NetFramework.csproj
index 435f8d964455..839b4376a433 100644
--- a/sdk/src/Services/OAM/AWSSDK.OAM.NetFramework.csproj
+++ b/sdk/src/Services/OAM/AWSSDK.OAM.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);BCL;AWS_ASYNC_API;CODE_ANALYSIS</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(RuleSetFileForBuild)' == 'false' Or '$(RuleSetFileForBuild)' == '' ">
diff --git a/sdk/src/Services/OAM/AWSSDK.OAM.NetStandard.csproj b/sdk/src/Services/OAM/AWSSDK.OAM.NetStandard.csproj
index 10be260fa3ac..4948efe01b43 100644
--- a/sdk/src/Services/OAM/AWSSDK.OAM.NetStandard.csproj
+++ b/sdk/src/Services/OAM/AWSSDK.OAM.NetStandard.csproj
@@ -22,6 +22,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <!-- Async Enumerable Compatibility -->
diff --git a/sdk/src/Services/OAM/Generated/AmazonOAMConfig.cs b/sdk/src/Services/OAM/Generated/AmazonOAMConfig.cs
index 83a1afffe834..3ded1f8a1950 100644
--- a/sdk/src/Services/OAM/Generated/AmazonOAMConfig.cs
+++ b/sdk/src/Services/OAM/Generated/AmazonOAMConfig.cs
@@ -34,7 +34,7 @@ namespace Amazon.OAM
     public partial class AmazonOAMConfig : ClientConfig
     {
         private static readonly string UserAgentString =
-            InternalSDKUtils.BuildUserAgentString("OAM", "3.7.302.1");
+            InternalSDKUtils.BuildUserAgentString("OAM", "4.0.0.0");
 
         private static readonly AmazonOAMEndpointResolver EndpointResolver =
             new AmazonOAMEndpointResolver();
diff --git a/sdk/src/Services/OAM/Properties/AssemblyInfo.cs b/sdk/src/Services/OAM/Properties/AssemblyInfo.cs
index ca22f530beca..7079ca4f2360 100644
--- a/sdk/src/Services/OAM/Properties/AssemblyInfo.cs
+++ b/sdk/src/Services/OAM/Properties/AssemblyInfo.cs
@@ -41,5 +41,9 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.302.1")]
\ No newline at end of file
+#if BCL
+[assembly: AssemblyVersion("4.0")]
+#else
+[assembly: AssemblyVersion("4.0.0.0")]
+#endif
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/src/Services/OSIS/AWSSDK.OSIS.NetFramework.csproj b/sdk/src/Services/OSIS/AWSSDK.OSIS.NetFramework.csproj
index d2ba4eef3656..583f8f82cc9f 100644
--- a/sdk/src/Services/OSIS/AWSSDK.OSIS.NetFramework.csproj
+++ b/sdk/src/Services/OSIS/AWSSDK.OSIS.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);BCL;AWS_ASYNC_API;CODE_ANALYSIS</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(RuleSetFileForBuild)' == 'false' Or '$(RuleSetFileForBuild)' == '' ">
diff --git a/sdk/src/Services/OSIS/AWSSDK.OSIS.NetStandard.csproj b/sdk/src/Services/OSIS/AWSSDK.OSIS.NetStandard.csproj
index 27088976fe38..dbf04e2ffa60 100644
--- a/sdk/src/Services/OSIS/AWSSDK.OSIS.NetStandard.csproj
+++ b/sdk/src/Services/OSIS/AWSSDK.OSIS.NetStandard.csproj
@@ -22,6 +22,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <!-- Async Enumerable Compatibility -->
diff --git a/sdk/src/Services/OSIS/Generated/AmazonOSISConfig.cs b/sdk/src/Services/OSIS/Generated/AmazonOSISConfig.cs
index 1d1b19ed02cc..bdb0d1aa5675 100644
--- a/sdk/src/Services/OSIS/Generated/AmazonOSISConfig.cs
+++ b/sdk/src/Services/OSIS/Generated/AmazonOSISConfig.cs
@@ -34,7 +34,7 @@ namespace Amazon.OSIS
     public partial class AmazonOSISConfig : ClientConfig
     {
         private static readonly string UserAgentString =
-            InternalSDKUtils.BuildUserAgentString("OSIS", "3.7.301.79");
+            InternalSDKUtils.BuildUserAgentString("OSIS", "4.0.0.0");
 
         private static readonly AmazonOSISEndpointResolver EndpointResolver =
             new AmazonOSISEndpointResolver();
diff --git a/sdk/src/Services/OSIS/Properties/AssemblyInfo.cs b/sdk/src/Services/OSIS/Properties/AssemblyInfo.cs
index 61562d5b9da4..6fe45e762e19 100644
--- a/sdk/src/Services/OSIS/Properties/AssemblyInfo.cs
+++ b/sdk/src/Services/OSIS/Properties/AssemblyInfo.cs
@@ -41,5 +41,9 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.301.79")]
\ No newline at end of file
+#if BCL
+[assembly: AssemblyVersion("4.0")]
+#else
+[assembly: AssemblyVersion("4.0.0.0")]
+#endif
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/src/Services/Omics/AWSSDK.Omics.NetFramework.csproj b/sdk/src/Services/Omics/AWSSDK.Omics.NetFramework.csproj
index 45e16d3ccea0..89b89ec19f39 100644
--- a/sdk/src/Services/Omics/AWSSDK.Omics.NetFramework.csproj
+++ b/sdk/src/Services/Omics/AWSSDK.Omics.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);BCL;AWS_ASYNC_API;CODE_ANALYSIS</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(RuleSetFileForBuild)' == 'false' Or '$(RuleSetFileForBuild)' == '' ">
diff --git a/sdk/src/Services/Omics/AWSSDK.Omics.NetStandard.csproj b/sdk/src/Services/Omics/AWSSDK.Omics.NetStandard.csproj
index 3b48a41623f9..b8b8290678b8 100644
--- a/sdk/src/Services/Omics/AWSSDK.Omics.NetStandard.csproj
+++ b/sdk/src/Services/Omics/AWSSDK.Omics.NetStandard.csproj
@@ -22,6 +22,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <!-- Async Enumerable Compatibility -->
diff --git a/sdk/src/Services/Omics/Generated/AmazonOmicsConfig.cs b/sdk/src/Services/Omics/Generated/AmazonOmicsConfig.cs
index a421791ca0d2..22adc0a4e2bd 100644
--- a/sdk/src/Services/Omics/Generated/AmazonOmicsConfig.cs
+++ b/sdk/src/Services/Omics/Generated/AmazonOmicsConfig.cs
@@ -34,7 +34,7 @@ namespace Amazon.Omics
     public partial class AmazonOmicsConfig : ClientConfig
     {
         private static readonly string UserAgentString =
-            InternalSDKUtils.BuildUserAgentString("Omics", "3.7.302.0");
+            InternalSDKUtils.BuildUserAgentString("Omics", "4.0.0.0");
 
         private static readonly AmazonOmicsEndpointResolver EndpointResolver =
             new AmazonOmicsEndpointResolver();
diff --git a/sdk/src/Services/Omics/Properties/AssemblyInfo.cs b/sdk/src/Services/Omics/Properties/AssemblyInfo.cs
index c861c500dd90..4fe4f26f7d24 100644
--- a/sdk/src/Services/Omics/Properties/AssemblyInfo.cs
+++ b/sdk/src/Services/Omics/Properties/AssemblyInfo.cs
@@ -41,5 +41,9 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.302.0")]
\ No newline at end of file
+#if BCL
+[assembly: AssemblyVersion("4.0")]
+#else
+[assembly: AssemblyVersion("4.0.0.0")]
+#endif
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/src/Services/OpenSearchServerless/AWSSDK.OpenSearchServerless.NetFramework.csproj b/sdk/src/Services/OpenSearchServerless/AWSSDK.OpenSearchServerless.NetFramework.csproj
index e3891735c11e..84c52e0289c8 100644
--- a/sdk/src/Services/OpenSearchServerless/AWSSDK.OpenSearchServerless.NetFramework.csproj
+++ b/sdk/src/Services/OpenSearchServerless/AWSSDK.OpenSearchServerless.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);BCL;AWS_ASYNC_API;CODE_ANALYSIS</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(RuleSetFileForBuild)' == 'false' Or '$(RuleSetFileForBuild)' == '' ">
diff --git a/sdk/src/Services/OpenSearchServerless/AWSSDK.OpenSearchServerless.NetStandard.csproj b/sdk/src/Services/OpenSearchServerless/AWSSDK.OpenSearchServerless.NetStandard.csproj
index 1a863a98ac40..e56d4a5e3633 100644
--- a/sdk/src/Services/OpenSearchServerless/AWSSDK.OpenSearchServerless.NetStandard.csproj
+++ b/sdk/src/Services/OpenSearchServerless/AWSSDK.OpenSearchServerless.NetStandard.csproj
@@ -22,6 +22,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <!-- Async Enumerable Compatibility -->
diff --git a/sdk/src/Services/OpenSearchServerless/Generated/AmazonOpenSearchServerlessConfig.cs b/sdk/src/Services/OpenSearchServerless/Generated/AmazonOpenSearchServerlessConfig.cs
index ff31b17988cc..7badded0aeb7 100644
--- a/sdk/src/Services/OpenSearchServerless/Generated/AmazonOpenSearchServerlessConfig.cs
+++ b/sdk/src/Services/OpenSearchServerless/Generated/AmazonOpenSearchServerlessConfig.cs
@@ -34,7 +34,7 @@ namespace Amazon.OpenSearchServerless
     public partial class AmazonOpenSearchServerlessConfig : ClientConfig
     {
         private static readonly string UserAgentString =
-            InternalSDKUtils.BuildUserAgentString("OpenSearchServerless", "3.7.301.73");
+            InternalSDKUtils.BuildUserAgentString("OpenSearchServerless", "4.0.0.0");
 
         private static readonly AmazonOpenSearchServerlessEndpointResolver EndpointResolver =
             new AmazonOpenSearchServerlessEndpointResolver();
diff --git a/sdk/src/Services/OpenSearchServerless/Properties/AssemblyInfo.cs b/sdk/src/Services/OpenSearchServerless/Properties/AssemblyInfo.cs
index 13176d7e4e85..99f43cbae69f 100644
--- a/sdk/src/Services/OpenSearchServerless/Properties/AssemblyInfo.cs
+++ b/sdk/src/Services/OpenSearchServerless/Properties/AssemblyInfo.cs
@@ -41,5 +41,9 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.301.73")]
\ No newline at end of file
+#if BCL
+[assembly: AssemblyVersion("4.0")]
+#else
+[assembly: AssemblyVersion("4.0.0.0")]
+#endif
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/src/Services/OpenSearchService/AWSSDK.OpenSearchService.NetFramework.csproj b/sdk/src/Services/OpenSearchService/AWSSDK.OpenSearchService.NetFramework.csproj
index eb31d8f56756..17a071bbb090 100644
--- a/sdk/src/Services/OpenSearchService/AWSSDK.OpenSearchService.NetFramework.csproj
+++ b/sdk/src/Services/OpenSearchService/AWSSDK.OpenSearchService.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);BCL;AWS_ASYNC_API;CODE_ANALYSIS</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(RuleSetFileForBuild)' == 'false' Or '$(RuleSetFileForBuild)' == '' ">
diff --git a/sdk/src/Services/OpenSearchService/AWSSDK.OpenSearchService.NetStandard.csproj b/sdk/src/Services/OpenSearchService/AWSSDK.OpenSearchService.NetStandard.csproj
index f066ea44f9d5..8506d1acd7f4 100644
--- a/sdk/src/Services/OpenSearchService/AWSSDK.OpenSearchService.NetStandard.csproj
+++ b/sdk/src/Services/OpenSearchService/AWSSDK.OpenSearchService.NetStandard.csproj
@@ -22,6 +22,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <!-- Async Enumerable Compatibility -->
diff --git a/sdk/src/Services/OpenSearchService/Generated/AmazonOpenSearchServiceConfig.cs b/sdk/src/Services/OpenSearchService/Generated/AmazonOpenSearchServiceConfig.cs
index 84a6599db459..6627502e6c35 100644
--- a/sdk/src/Services/OpenSearchService/Generated/AmazonOpenSearchServiceConfig.cs
+++ b/sdk/src/Services/OpenSearchService/Generated/AmazonOpenSearchServiceConfig.cs
@@ -34,7 +34,7 @@ namespace Amazon.OpenSearchService
     public partial class AmazonOpenSearchServiceConfig : ClientConfig
     {
         private static readonly string UserAgentString =
-            InternalSDKUtils.BuildUserAgentString("OpenSearch", "3.7.306.0");
+            InternalSDKUtils.BuildUserAgentString("OpenSearch", "4.0.0.0");
 
         private static readonly AmazonOpenSearchServiceEndpointResolver EndpointResolver =
             new AmazonOpenSearchServiceEndpointResolver();
diff --git a/sdk/src/Services/OpenSearchService/Properties/AssemblyInfo.cs b/sdk/src/Services/OpenSearchService/Properties/AssemblyInfo.cs
index 907a42756e03..e8b7a2f4b871 100644
--- a/sdk/src/Services/OpenSearchService/Properties/AssemblyInfo.cs
+++ b/sdk/src/Services/OpenSearchService/Properties/AssemblyInfo.cs
@@ -41,5 +41,9 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.306.0")]
\ No newline at end of file
+#if BCL
+[assembly: AssemblyVersion("4.0")]
+#else
+[assembly: AssemblyVersion("4.0.0.0")]
+#endif
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/src/Services/OpsWorks/AWSSDK.OpsWorks.NetFramework.csproj b/sdk/src/Services/OpsWorks/AWSSDK.OpsWorks.NetFramework.csproj
index ddff57234b35..cddab6541d4d 100644
--- a/sdk/src/Services/OpsWorks/AWSSDK.OpsWorks.NetFramework.csproj
+++ b/sdk/src/Services/OpsWorks/AWSSDK.OpsWorks.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);BCL;AWS_ASYNC_API;CODE_ANALYSIS</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(RuleSetFileForBuild)' == 'false' Or '$(RuleSetFileForBuild)' == '' ">
diff --git a/sdk/src/Services/OpsWorks/AWSSDK.OpsWorks.NetStandard.csproj b/sdk/src/Services/OpsWorks/AWSSDK.OpsWorks.NetStandard.csproj
index f460852cce1d..66e197d4a0fb 100644
--- a/sdk/src/Services/OpsWorks/AWSSDK.OpsWorks.NetStandard.csproj
+++ b/sdk/src/Services/OpsWorks/AWSSDK.OpsWorks.NetStandard.csproj
@@ -22,6 +22,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <!-- Async Enumerable Compatibility -->
diff --git a/sdk/src/Services/OpsWorks/Generated/AmazonOpsWorksConfig.cs b/sdk/src/Services/OpsWorks/Generated/AmazonOpsWorksConfig.cs
index f50042a32d1a..c4462f8b37dc 100644
--- a/sdk/src/Services/OpsWorks/Generated/AmazonOpsWorksConfig.cs
+++ b/sdk/src/Services/OpsWorks/Generated/AmazonOpsWorksConfig.cs
@@ -34,7 +34,7 @@ namespace Amazon.OpsWorks
     public partial class AmazonOpsWorksConfig : ClientConfig
     {
         private static readonly string UserAgentString =
-            InternalSDKUtils.BuildUserAgentString("OpsWorks", "3.7.300.84");
+            InternalSDKUtils.BuildUserAgentString("OpsWorks", "4.0.0.0");
 
         private static readonly AmazonOpsWorksEndpointResolver EndpointResolver =
             new AmazonOpsWorksEndpointResolver();
diff --git a/sdk/src/Services/OpsWorks/Properties/AssemblyInfo.cs b/sdk/src/Services/OpsWorks/Properties/AssemblyInfo.cs
index 0de50cf8ca83..1ac4523936cc 100644
--- a/sdk/src/Services/OpsWorks/Properties/AssemblyInfo.cs
+++ b/sdk/src/Services/OpsWorks/Properties/AssemblyInfo.cs
@@ -41,5 +41,9 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.300.84")]
\ No newline at end of file
+#if BCL
+[assembly: AssemblyVersion("4.0")]
+#else
+[assembly: AssemblyVersion("4.0.0.0")]
+#endif
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/src/Services/OpsWorksCM/AWSSDK.OpsWorksCM.NetFramework.csproj b/sdk/src/Services/OpsWorksCM/AWSSDK.OpsWorksCM.NetFramework.csproj
index 9d65c3c195f0..f630aeb55008 100644
--- a/sdk/src/Services/OpsWorksCM/AWSSDK.OpsWorksCM.NetFramework.csproj
+++ b/sdk/src/Services/OpsWorksCM/AWSSDK.OpsWorksCM.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);BCL;AWS_ASYNC_API;CODE_ANALYSIS</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(RuleSetFileForBuild)' == 'false' Or '$(RuleSetFileForBuild)' == '' ">
diff --git a/sdk/src/Services/OpsWorksCM/AWSSDK.OpsWorksCM.NetStandard.csproj b/sdk/src/Services/OpsWorksCM/AWSSDK.OpsWorksCM.NetStandard.csproj
index 0de713e0f3e1..f6e5e0052865 100644
--- a/sdk/src/Services/OpsWorksCM/AWSSDK.OpsWorksCM.NetStandard.csproj
+++ b/sdk/src/Services/OpsWorksCM/AWSSDK.OpsWorksCM.NetStandard.csproj
@@ -22,6 +22,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <!-- Async Enumerable Compatibility -->
diff --git a/sdk/src/Services/OpsWorksCM/Generated/AmazonOpsWorksCMConfig.cs b/sdk/src/Services/OpsWorksCM/Generated/AmazonOpsWorksCMConfig.cs
index 3218eecea02e..5b7a4d818ab3 100644
--- a/sdk/src/Services/OpsWorksCM/Generated/AmazonOpsWorksCMConfig.cs
+++ b/sdk/src/Services/OpsWorksCM/Generated/AmazonOpsWorksCMConfig.cs
@@ -34,7 +34,7 @@ namespace Amazon.OpsWorksCM
     public partial class AmazonOpsWorksCMConfig : ClientConfig
     {
         private static readonly string UserAgentString =
-            InternalSDKUtils.BuildUserAgentString("OpsWorksCM", "3.7.300.84");
+            InternalSDKUtils.BuildUserAgentString("OpsWorksCM", "4.0.0.0");
 
         private static readonly AmazonOpsWorksCMEndpointResolver EndpointResolver =
             new AmazonOpsWorksCMEndpointResolver();
diff --git a/sdk/src/Services/OpsWorksCM/Properties/AssemblyInfo.cs b/sdk/src/Services/OpsWorksCM/Properties/AssemblyInfo.cs
index e422fe96cd5d..da6079ca93df 100644
--- a/sdk/src/Services/OpsWorksCM/Properties/AssemblyInfo.cs
+++ b/sdk/src/Services/OpsWorksCM/Properties/AssemblyInfo.cs
@@ -41,5 +41,9 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.300.84")]
\ No newline at end of file
+#if BCL
+[assembly: AssemblyVersion("4.0")]
+#else
+[assembly: AssemblyVersion("4.0.0.0")]
+#endif
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/src/Services/Organizations/AWSSDK.Organizations.NetFramework.csproj b/sdk/src/Services/Organizations/AWSSDK.Organizations.NetFramework.csproj
index 57dd29053793..ca9d6a2095dc 100644
--- a/sdk/src/Services/Organizations/AWSSDK.Organizations.NetFramework.csproj
+++ b/sdk/src/Services/Organizations/AWSSDK.Organizations.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);BCL;AWS_ASYNC_API;CODE_ANALYSIS</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(RuleSetFileForBuild)' == 'false' Or '$(RuleSetFileForBuild)' == '' ">
diff --git a/sdk/src/Services/Organizations/AWSSDK.Organizations.NetStandard.csproj b/sdk/src/Services/Organizations/AWSSDK.Organizations.NetStandard.csproj
index a1418f6f7320..491d7d581c01 100644
--- a/sdk/src/Services/Organizations/AWSSDK.Organizations.NetStandard.csproj
+++ b/sdk/src/Services/Organizations/AWSSDK.Organizations.NetStandard.csproj
@@ -22,6 +22,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <!-- Async Enumerable Compatibility -->
diff --git a/sdk/src/Services/Organizations/Generated/AmazonOrganizationsConfig.cs b/sdk/src/Services/Organizations/Generated/AmazonOrganizationsConfig.cs
index 53faa7ce50bb..581b2857d13d 100644
--- a/sdk/src/Services/Organizations/Generated/AmazonOrganizationsConfig.cs
+++ b/sdk/src/Services/Organizations/Generated/AmazonOrganizationsConfig.cs
@@ -34,7 +34,7 @@ namespace Amazon.Organizations
     public partial class AmazonOrganizationsConfig : ClientConfig
     {
         private static readonly string UserAgentString =
-            InternalSDKUtils.BuildUserAgentString("Organizations", "3.7.302.30");
+            InternalSDKUtils.BuildUserAgentString("Organizations", "4.0.0.0");
 
         private static readonly AmazonOrganizationsEndpointResolver EndpointResolver =
             new AmazonOrganizationsEndpointResolver();
diff --git a/sdk/src/Services/Organizations/Properties/AssemblyInfo.cs b/sdk/src/Services/Organizations/Properties/AssemblyInfo.cs
index e54f845a4624..7706e3acc16b 100644
--- a/sdk/src/Services/Organizations/Properties/AssemblyInfo.cs
+++ b/sdk/src/Services/Organizations/Properties/AssemblyInfo.cs
@@ -41,5 +41,9 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.302.30")]
\ No newline at end of file
+#if BCL
+[assembly: AssemblyVersion("4.0")]
+#else
+[assembly: AssemblyVersion("4.0.0.0")]
+#endif
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/src/Services/Outposts/AWSSDK.Outposts.NetFramework.csproj b/sdk/src/Services/Outposts/AWSSDK.Outposts.NetFramework.csproj
index 1decf0f2281c..50be4703662a 100644
--- a/sdk/src/Services/Outposts/AWSSDK.Outposts.NetFramework.csproj
+++ b/sdk/src/Services/Outposts/AWSSDK.Outposts.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);BCL;AWS_ASYNC_API;CODE_ANALYSIS</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(RuleSetFileForBuild)' == 'false' Or '$(RuleSetFileForBuild)' == '' ">
diff --git a/sdk/src/Services/Outposts/AWSSDK.Outposts.NetStandard.csproj b/sdk/src/Services/Outposts/AWSSDK.Outposts.NetStandard.csproj
index fa3a5d7d3e45..ca9e0839e35a 100644
--- a/sdk/src/Services/Outposts/AWSSDK.Outposts.NetStandard.csproj
+++ b/sdk/src/Services/Outposts/AWSSDK.Outposts.NetStandard.csproj
@@ -22,6 +22,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <!-- Async Enumerable Compatibility -->
diff --git a/sdk/src/Services/Outposts/Generated/AmazonOutpostsConfig.cs b/sdk/src/Services/Outposts/Generated/AmazonOutpostsConfig.cs
index 198665361f54..bad6f8278ab7 100644
--- a/sdk/src/Services/Outposts/Generated/AmazonOutpostsConfig.cs
+++ b/sdk/src/Services/Outposts/Generated/AmazonOutpostsConfig.cs
@@ -34,7 +34,7 @@ namespace Amazon.Outposts
     public partial class AmazonOutpostsConfig : ClientConfig
     {
         private static readonly string UserAgentString =
-            InternalSDKUtils.BuildUserAgentString("Outposts", "3.7.303.9");
+            InternalSDKUtils.BuildUserAgentString("Outposts", "4.0.0.0");
 
         private static readonly AmazonOutpostsEndpointResolver EndpointResolver =
             new AmazonOutpostsEndpointResolver();
diff --git a/sdk/src/Services/Outposts/Properties/AssemblyInfo.cs b/sdk/src/Services/Outposts/Properties/AssemblyInfo.cs
index 7b469dd6aa63..9b8ad2a602df 100644
--- a/sdk/src/Services/Outposts/Properties/AssemblyInfo.cs
+++ b/sdk/src/Services/Outposts/Properties/AssemblyInfo.cs
@@ -41,5 +41,9 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.303.9")]
\ No newline at end of file
+#if BCL
+[assembly: AssemblyVersion("4.0")]
+#else
+[assembly: AssemblyVersion("4.0.0.0")]
+#endif
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/src/Services/PI/AWSSDK.PI.NetFramework.csproj b/sdk/src/Services/PI/AWSSDK.PI.NetFramework.csproj
index 58d778222d0f..124425e1c35c 100644
--- a/sdk/src/Services/PI/AWSSDK.PI.NetFramework.csproj
+++ b/sdk/src/Services/PI/AWSSDK.PI.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);BCL;AWS_ASYNC_API;CODE_ANALYSIS</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(RuleSetFileForBuild)' == 'false' Or '$(RuleSetFileForBuild)' == '' ">
diff --git a/sdk/src/Services/PI/AWSSDK.PI.NetStandard.csproj b/sdk/src/Services/PI/AWSSDK.PI.NetStandard.csproj
index 39f7cf0a4a81..7c068e99ce06 100644
--- a/sdk/src/Services/PI/AWSSDK.PI.NetStandard.csproj
+++ b/sdk/src/Services/PI/AWSSDK.PI.NetStandard.csproj
@@ -22,6 +22,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <!-- Async Enumerable Compatibility -->
diff --git a/sdk/src/Services/PI/Generated/AmazonPIConfig.cs b/sdk/src/Services/PI/Generated/AmazonPIConfig.cs
index ed84cb4dc28f..cf8d338bdd99 100644
--- a/sdk/src/Services/PI/Generated/AmazonPIConfig.cs
+++ b/sdk/src/Services/PI/Generated/AmazonPIConfig.cs
@@ -34,7 +34,7 @@ namespace Amazon.PI
     public partial class AmazonPIConfig : ClientConfig
     {
         private static readonly string UserAgentString =
-            InternalSDKUtils.BuildUserAgentString("PI", "3.7.300.84");
+            InternalSDKUtils.BuildUserAgentString("PI", "4.0.0.0");
 
         private static readonly AmazonPIEndpointResolver EndpointResolver =
             new AmazonPIEndpointResolver();
diff --git a/sdk/src/Services/PI/Properties/AssemblyInfo.cs b/sdk/src/Services/PI/Properties/AssemblyInfo.cs
index b40b719e20f6..0f64c24f152f 100644
--- a/sdk/src/Services/PI/Properties/AssemblyInfo.cs
+++ b/sdk/src/Services/PI/Properties/AssemblyInfo.cs
@@ -41,5 +41,9 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.300.84")]
\ No newline at end of file
+#if BCL
+[assembly: AssemblyVersion("4.0")]
+#else
+[assembly: AssemblyVersion("4.0.0.0")]
+#endif
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/src/Services/Panorama/AWSSDK.Panorama.NetFramework.csproj b/sdk/src/Services/Panorama/AWSSDK.Panorama.NetFramework.csproj
index 77ba2a3a8d29..7229171528bb 100644
--- a/sdk/src/Services/Panorama/AWSSDK.Panorama.NetFramework.csproj
+++ b/sdk/src/Services/Panorama/AWSSDK.Panorama.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);BCL;AWS_ASYNC_API;CODE_ANALYSIS</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(RuleSetFileForBuild)' == 'false' Or '$(RuleSetFileForBuild)' == '' ">
diff --git a/sdk/src/Services/Panorama/AWSSDK.Panorama.NetStandard.csproj b/sdk/src/Services/Panorama/AWSSDK.Panorama.NetStandard.csproj
index 384082da9280..c1943b986a0c 100644
--- a/sdk/src/Services/Panorama/AWSSDK.Panorama.NetStandard.csproj
+++ b/sdk/src/Services/Panorama/AWSSDK.Panorama.NetStandard.csproj
@@ -22,6 +22,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <!-- Async Enumerable Compatibility -->
diff --git a/sdk/src/Services/Panorama/Generated/AmazonPanoramaConfig.cs b/sdk/src/Services/Panorama/Generated/AmazonPanoramaConfig.cs
index 1fe01dd3d0d5..e2227cb67886 100644
--- a/sdk/src/Services/Panorama/Generated/AmazonPanoramaConfig.cs
+++ b/sdk/src/Services/Panorama/Generated/AmazonPanoramaConfig.cs
@@ -34,7 +34,7 @@ namespace Amazon.Panorama
     public partial class AmazonPanoramaConfig : ClientConfig
     {
         private static readonly string UserAgentString =
-            InternalSDKUtils.BuildUserAgentString("Panorama", "3.7.300.84");
+            InternalSDKUtils.BuildUserAgentString("Panorama", "4.0.0.0");
 
         private static readonly AmazonPanoramaEndpointResolver EndpointResolver =
             new AmazonPanoramaEndpointResolver();
diff --git a/sdk/src/Services/Panorama/Properties/AssemblyInfo.cs b/sdk/src/Services/Panorama/Properties/AssemblyInfo.cs
index 2487f32d1c6f..a2c4746ba096 100644
--- a/sdk/src/Services/Panorama/Properties/AssemblyInfo.cs
+++ b/sdk/src/Services/Panorama/Properties/AssemblyInfo.cs
@@ -41,5 +41,9 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.300.84")]
\ No newline at end of file
+#if BCL
+[assembly: AssemblyVersion("4.0")]
+#else
+[assembly: AssemblyVersion("4.0.0.0")]
+#endif
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/src/Services/PaymentCryptography/AWSSDK.PaymentCryptography.NetFramework.csproj b/sdk/src/Services/PaymentCryptography/AWSSDK.PaymentCryptography.NetFramework.csproj
index 3f1abfc5f423..c06cbdd451a3 100644
--- a/sdk/src/Services/PaymentCryptography/AWSSDK.PaymentCryptography.NetFramework.csproj
+++ b/sdk/src/Services/PaymentCryptography/AWSSDK.PaymentCryptography.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);BCL;AWS_ASYNC_API;CODE_ANALYSIS</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(RuleSetFileForBuild)' == 'false' Or '$(RuleSetFileForBuild)' == '' ">
diff --git a/sdk/src/Services/PaymentCryptography/AWSSDK.PaymentCryptography.NetStandard.csproj b/sdk/src/Services/PaymentCryptography/AWSSDK.PaymentCryptography.NetStandard.csproj
index 45801add6c6b..542aa19795c4 100644
--- a/sdk/src/Services/PaymentCryptography/AWSSDK.PaymentCryptography.NetStandard.csproj
+++ b/sdk/src/Services/PaymentCryptography/AWSSDK.PaymentCryptography.NetStandard.csproj
@@ -22,6 +22,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <!-- Async Enumerable Compatibility -->
diff --git a/sdk/src/Services/PaymentCryptography/Generated/AmazonPaymentCryptographyConfig.cs b/sdk/src/Services/PaymentCryptography/Generated/AmazonPaymentCryptographyConfig.cs
index 3099db5cc1b3..d56621b8c37f 100644
--- a/sdk/src/Services/PaymentCryptography/Generated/AmazonPaymentCryptographyConfig.cs
+++ b/sdk/src/Services/PaymentCryptography/Generated/AmazonPaymentCryptographyConfig.cs
@@ -34,7 +34,7 @@ namespace Amazon.PaymentCryptography
     public partial class AmazonPaymentCryptographyConfig : ClientConfig
     {
         private static readonly string UserAgentString =
-            InternalSDKUtils.BuildUserAgentString("Payment Cryptography", "3.7.303.5");
+            InternalSDKUtils.BuildUserAgentString("Payment Cryptography", "4.0.0.0");
 
         private static readonly AmazonPaymentCryptographyEndpointResolver EndpointResolver =
             new AmazonPaymentCryptographyEndpointResolver();
diff --git a/sdk/src/Services/PaymentCryptography/Properties/AssemblyInfo.cs b/sdk/src/Services/PaymentCryptography/Properties/AssemblyInfo.cs
index 9814ee382bd2..de1470e885f9 100644
--- a/sdk/src/Services/PaymentCryptography/Properties/AssemblyInfo.cs
+++ b/sdk/src/Services/PaymentCryptography/Properties/AssemblyInfo.cs
@@ -41,5 +41,9 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.303.5")]
\ No newline at end of file
+#if BCL
+[assembly: AssemblyVersion("4.0")]
+#else
+[assembly: AssemblyVersion("4.0.0.0")]
+#endif
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/src/Services/PaymentCryptographyData/AWSSDK.PaymentCryptographyData.NetFramework.csproj b/sdk/src/Services/PaymentCryptographyData/AWSSDK.PaymentCryptographyData.NetFramework.csproj
index 2b599d095f6c..5d3ec7eee8fe 100644
--- a/sdk/src/Services/PaymentCryptographyData/AWSSDK.PaymentCryptographyData.NetFramework.csproj
+++ b/sdk/src/Services/PaymentCryptographyData/AWSSDK.PaymentCryptographyData.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);BCL;AWS_ASYNC_API;CODE_ANALYSIS</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(RuleSetFileForBuild)' == 'false' Or '$(RuleSetFileForBuild)' == '' ">
diff --git a/sdk/src/Services/PaymentCryptographyData/AWSSDK.PaymentCryptographyData.NetStandard.csproj b/sdk/src/Services/PaymentCryptographyData/AWSSDK.PaymentCryptographyData.NetStandard.csproj
index 81464d4bb9d0..5a8fdce51177 100644
--- a/sdk/src/Services/PaymentCryptographyData/AWSSDK.PaymentCryptographyData.NetStandard.csproj
+++ b/sdk/src/Services/PaymentCryptographyData/AWSSDK.PaymentCryptographyData.NetStandard.csproj
@@ -22,6 +22,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <!-- Async Enumerable Compatibility -->
diff --git a/sdk/src/Services/PaymentCryptographyData/Generated/AmazonPaymentCryptographyDataConfig.cs b/sdk/src/Services/PaymentCryptographyData/Generated/AmazonPaymentCryptographyDataConfig.cs
index 2a98f820bbb0..d1b33295ad3c 100644
--- a/sdk/src/Services/PaymentCryptographyData/Generated/AmazonPaymentCryptographyDataConfig.cs
+++ b/sdk/src/Services/PaymentCryptographyData/Generated/AmazonPaymentCryptographyDataConfig.cs
@@ -34,7 +34,7 @@ namespace Amazon.PaymentCryptographyData
     public partial class AmazonPaymentCryptographyDataConfig : ClientConfig
     {
         private static readonly string UserAgentString =
-            InternalSDKUtils.BuildUserAgentString("Payment Cryptography Data", "3.7.301.30");
+            InternalSDKUtils.BuildUserAgentString("Payment Cryptography Data", "4.0.0.0");
 
         private static readonly AmazonPaymentCryptographyDataEndpointResolver EndpointResolver =
             new AmazonPaymentCryptographyDataEndpointResolver();
diff --git a/sdk/src/Services/PaymentCryptographyData/Properties/AssemblyInfo.cs b/sdk/src/Services/PaymentCryptographyData/Properties/AssemblyInfo.cs
index 3b7a18c34346..0eacb3670a45 100644
--- a/sdk/src/Services/PaymentCryptographyData/Properties/AssemblyInfo.cs
+++ b/sdk/src/Services/PaymentCryptographyData/Properties/AssemblyInfo.cs
@@ -41,5 +41,9 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.301.30")]
\ No newline at end of file
+#if BCL
+[assembly: AssemblyVersion("4.0")]
+#else
+[assembly: AssemblyVersion("4.0.0.0")]
+#endif
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/src/Services/PcaConnectorAd/AWSSDK.PcaConnectorAd.NetFramework.csproj b/sdk/src/Services/PcaConnectorAd/AWSSDK.PcaConnectorAd.NetFramework.csproj
index f90b194beafd..449d58e9dd78 100644
--- a/sdk/src/Services/PcaConnectorAd/AWSSDK.PcaConnectorAd.NetFramework.csproj
+++ b/sdk/src/Services/PcaConnectorAd/AWSSDK.PcaConnectorAd.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);BCL;AWS_ASYNC_API;CODE_ANALYSIS</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(RuleSetFileForBuild)' == 'false' Or '$(RuleSetFileForBuild)' == '' ">
diff --git a/sdk/src/Services/PcaConnectorAd/AWSSDK.PcaConnectorAd.NetStandard.csproj b/sdk/src/Services/PcaConnectorAd/AWSSDK.PcaConnectorAd.NetStandard.csproj
index e94bc8b74bc8..5d7999a24fd2 100644
--- a/sdk/src/Services/PcaConnectorAd/AWSSDK.PcaConnectorAd.NetStandard.csproj
+++ b/sdk/src/Services/PcaConnectorAd/AWSSDK.PcaConnectorAd.NetStandard.csproj
@@ -22,6 +22,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <!-- Async Enumerable Compatibility -->
diff --git a/sdk/src/Services/PcaConnectorAd/Generated/AmazonPcaConnectorAdConfig.cs b/sdk/src/Services/PcaConnectorAd/Generated/AmazonPcaConnectorAdConfig.cs
index 6f212d8ff2dd..fd734e13a25d 100644
--- a/sdk/src/Services/PcaConnectorAd/Generated/AmazonPcaConnectorAdConfig.cs
+++ b/sdk/src/Services/PcaConnectorAd/Generated/AmazonPcaConnectorAdConfig.cs
@@ -34,7 +34,7 @@ namespace Amazon.PcaConnectorAd
     public partial class AmazonPcaConnectorAdConfig : ClientConfig
     {
         private static readonly string UserAgentString =
-            InternalSDKUtils.BuildUserAgentString("Pca Connector Ad", "3.7.300.84");
+            InternalSDKUtils.BuildUserAgentString("Pca Connector Ad", "4.0.0.0");
 
         private static readonly AmazonPcaConnectorAdEndpointResolver EndpointResolver =
             new AmazonPcaConnectorAdEndpointResolver();
diff --git a/sdk/src/Services/PcaConnectorAd/Properties/AssemblyInfo.cs b/sdk/src/Services/PcaConnectorAd/Properties/AssemblyInfo.cs
index 0562a0b6068b..cb5ee05f7b55 100644
--- a/sdk/src/Services/PcaConnectorAd/Properties/AssemblyInfo.cs
+++ b/sdk/src/Services/PcaConnectorAd/Properties/AssemblyInfo.cs
@@ -41,5 +41,9 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.300.84")]
\ No newline at end of file
+#if BCL
+[assembly: AssemblyVersion("4.0")]
+#else
+[assembly: AssemblyVersion("4.0.0.0")]
+#endif
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/src/Services/Personalize/AWSSDK.Personalize.NetFramework.csproj b/sdk/src/Services/Personalize/AWSSDK.Personalize.NetFramework.csproj
index 9160539d568d..4f8bc2d215b9 100644
--- a/sdk/src/Services/Personalize/AWSSDK.Personalize.NetFramework.csproj
+++ b/sdk/src/Services/Personalize/AWSSDK.Personalize.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);BCL;AWS_ASYNC_API;CODE_ANALYSIS</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(RuleSetFileForBuild)' == 'false' Or '$(RuleSetFileForBuild)' == '' ">
diff --git a/sdk/src/Services/Personalize/AWSSDK.Personalize.NetStandard.csproj b/sdk/src/Services/Personalize/AWSSDK.Personalize.NetStandard.csproj
index f56c0acb2936..8c28d71f9738 100644
--- a/sdk/src/Services/Personalize/AWSSDK.Personalize.NetStandard.csproj
+++ b/sdk/src/Services/Personalize/AWSSDK.Personalize.NetStandard.csproj
@@ -22,6 +22,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <!-- Async Enumerable Compatibility -->
diff --git a/sdk/src/Services/Personalize/Generated/AmazonPersonalizeConfig.cs b/sdk/src/Services/Personalize/Generated/AmazonPersonalizeConfig.cs
index 66a9dacd4abc..d0d7c088236c 100644
--- a/sdk/src/Services/Personalize/Generated/AmazonPersonalizeConfig.cs
+++ b/sdk/src/Services/Personalize/Generated/AmazonPersonalizeConfig.cs
@@ -34,7 +34,7 @@ namespace Amazon.Personalize
     public partial class AmazonPersonalizeConfig : ClientConfig
     {
         private static readonly string UserAgentString =
-            InternalSDKUtils.BuildUserAgentString("Personalize", "3.7.302.6");
+            InternalSDKUtils.BuildUserAgentString("Personalize", "4.0.0.0");
 
         private static readonly AmazonPersonalizeEndpointResolver EndpointResolver =
             new AmazonPersonalizeEndpointResolver();
diff --git a/sdk/src/Services/Personalize/Properties/AssemblyInfo.cs b/sdk/src/Services/Personalize/Properties/AssemblyInfo.cs
index 0161d5fc29bf..0c759480ceae 100644
--- a/sdk/src/Services/Personalize/Properties/AssemblyInfo.cs
+++ b/sdk/src/Services/Personalize/Properties/AssemblyInfo.cs
@@ -41,5 +41,9 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.302.6")]
\ No newline at end of file
+#if BCL
+[assembly: AssemblyVersion("4.0")]
+#else
+[assembly: AssemblyVersion("4.0.0.0")]
+#endif
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/src/Services/PersonalizeEvents/AWSSDK.PersonalizeEvents.NetFramework.csproj b/sdk/src/Services/PersonalizeEvents/AWSSDK.PersonalizeEvents.NetFramework.csproj
index 946a694e4fb4..7006235ee810 100644
--- a/sdk/src/Services/PersonalizeEvents/AWSSDK.PersonalizeEvents.NetFramework.csproj
+++ b/sdk/src/Services/PersonalizeEvents/AWSSDK.PersonalizeEvents.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);BCL;AWS_ASYNC_API;CODE_ANALYSIS</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(RuleSetFileForBuild)' == 'false' Or '$(RuleSetFileForBuild)' == '' ">
diff --git a/sdk/src/Services/PersonalizeEvents/AWSSDK.PersonalizeEvents.NetStandard.csproj b/sdk/src/Services/PersonalizeEvents/AWSSDK.PersonalizeEvents.NetStandard.csproj
index 0e320ef68bcb..abbfa8d05392 100644
--- a/sdk/src/Services/PersonalizeEvents/AWSSDK.PersonalizeEvents.NetStandard.csproj
+++ b/sdk/src/Services/PersonalizeEvents/AWSSDK.PersonalizeEvents.NetStandard.csproj
@@ -22,6 +22,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <!-- Async Enumerable Compatibility -->
diff --git a/sdk/src/Services/PersonalizeEvents/Generated/AmazonPersonalizeEventsConfig.cs b/sdk/src/Services/PersonalizeEvents/Generated/AmazonPersonalizeEventsConfig.cs
index 909b53ca642d..7e1f5f8e1b60 100644
--- a/sdk/src/Services/PersonalizeEvents/Generated/AmazonPersonalizeEventsConfig.cs
+++ b/sdk/src/Services/PersonalizeEvents/Generated/AmazonPersonalizeEventsConfig.cs
@@ -34,7 +34,7 @@ namespace Amazon.PersonalizeEvents
     public partial class AmazonPersonalizeEventsConfig : ClientConfig
     {
         private static readonly string UserAgentString =
-            InternalSDKUtils.BuildUserAgentString("Personalize Events", "3.7.301.76");
+            InternalSDKUtils.BuildUserAgentString("Personalize Events", "4.0.0.0");
 
         private static readonly AmazonPersonalizeEventsEndpointResolver EndpointResolver =
             new AmazonPersonalizeEventsEndpointResolver();
diff --git a/sdk/src/Services/PersonalizeEvents/Properties/AssemblyInfo.cs b/sdk/src/Services/PersonalizeEvents/Properties/AssemblyInfo.cs
index 8453f88c4dd0..fa56e056213e 100644
--- a/sdk/src/Services/PersonalizeEvents/Properties/AssemblyInfo.cs
+++ b/sdk/src/Services/PersonalizeEvents/Properties/AssemblyInfo.cs
@@ -41,5 +41,9 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.301.76")]
\ No newline at end of file
+#if BCL
+[assembly: AssemblyVersion("4.0")]
+#else
+[assembly: AssemblyVersion("4.0.0.0")]
+#endif
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/src/Services/PersonalizeRuntime/AWSSDK.PersonalizeRuntime.NetFramework.csproj b/sdk/src/Services/PersonalizeRuntime/AWSSDK.PersonalizeRuntime.NetFramework.csproj
index f69dcd3094bc..858fc00d4eb9 100644
--- a/sdk/src/Services/PersonalizeRuntime/AWSSDK.PersonalizeRuntime.NetFramework.csproj
+++ b/sdk/src/Services/PersonalizeRuntime/AWSSDK.PersonalizeRuntime.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);BCL;AWS_ASYNC_API;CODE_ANALYSIS</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(RuleSetFileForBuild)' == 'false' Or '$(RuleSetFileForBuild)' == '' ">
diff --git a/sdk/src/Services/PersonalizeRuntime/AWSSDK.PersonalizeRuntime.NetStandard.csproj b/sdk/src/Services/PersonalizeRuntime/AWSSDK.PersonalizeRuntime.NetStandard.csproj
index 56c6cbf7c568..d61fb0adae9b 100644
--- a/sdk/src/Services/PersonalizeRuntime/AWSSDK.PersonalizeRuntime.NetStandard.csproj
+++ b/sdk/src/Services/PersonalizeRuntime/AWSSDK.PersonalizeRuntime.NetStandard.csproj
@@ -22,6 +22,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <!-- Async Enumerable Compatibility -->
diff --git a/sdk/src/Services/PersonalizeRuntime/Generated/AmazonPersonalizeRuntimeConfig.cs b/sdk/src/Services/PersonalizeRuntime/Generated/AmazonPersonalizeRuntimeConfig.cs
index d7f4e9f8f4da..ba092d2a4d18 100644
--- a/sdk/src/Services/PersonalizeRuntime/Generated/AmazonPersonalizeRuntimeConfig.cs
+++ b/sdk/src/Services/PersonalizeRuntime/Generated/AmazonPersonalizeRuntimeConfig.cs
@@ -34,7 +34,7 @@ namespace Amazon.PersonalizeRuntime
     public partial class AmazonPersonalizeRuntimeConfig : ClientConfig
     {
         private static readonly string UserAgentString =
-            InternalSDKUtils.BuildUserAgentString("Personalize Runtime", "3.7.301.76");
+            InternalSDKUtils.BuildUserAgentString("Personalize Runtime", "4.0.0.0");
 
         private static readonly AmazonPersonalizeRuntimeEndpointResolver EndpointResolver =
             new AmazonPersonalizeRuntimeEndpointResolver();
diff --git a/sdk/src/Services/PersonalizeRuntime/Properties/AssemblyInfo.cs b/sdk/src/Services/PersonalizeRuntime/Properties/AssemblyInfo.cs
index fce446153c58..30f6f3fc72fe 100644
--- a/sdk/src/Services/PersonalizeRuntime/Properties/AssemblyInfo.cs
+++ b/sdk/src/Services/PersonalizeRuntime/Properties/AssemblyInfo.cs
@@ -41,5 +41,9 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.301.76")]
\ No newline at end of file
+#if BCL
+[assembly: AssemblyVersion("4.0")]
+#else
+[assembly: AssemblyVersion("4.0.0.0")]
+#endif
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/src/Services/Pinpoint/AWSSDK.Pinpoint.NetFramework.csproj b/sdk/src/Services/Pinpoint/AWSSDK.Pinpoint.NetFramework.csproj
index 90b7a54be075..a839af40f58b 100644
--- a/sdk/src/Services/Pinpoint/AWSSDK.Pinpoint.NetFramework.csproj
+++ b/sdk/src/Services/Pinpoint/AWSSDK.Pinpoint.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);BCL;AWS_ASYNC_API;CODE_ANALYSIS</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(RuleSetFileForBuild)' == 'false' Or '$(RuleSetFileForBuild)' == '' ">
diff --git a/sdk/src/Services/Pinpoint/AWSSDK.Pinpoint.NetStandard.csproj b/sdk/src/Services/Pinpoint/AWSSDK.Pinpoint.NetStandard.csproj
index ee9b4be624f6..2d3eef56d5e7 100644
--- a/sdk/src/Services/Pinpoint/AWSSDK.Pinpoint.NetStandard.csproj
+++ b/sdk/src/Services/Pinpoint/AWSSDK.Pinpoint.NetStandard.csproj
@@ -22,6 +22,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <!-- Async Enumerable Compatibility -->
diff --git a/sdk/src/Services/Pinpoint/Generated/AmazonPinpointConfig.cs b/sdk/src/Services/Pinpoint/Generated/AmazonPinpointConfig.cs
index ab91c17a2b2e..dca58267f759 100644
--- a/sdk/src/Services/Pinpoint/Generated/AmazonPinpointConfig.cs
+++ b/sdk/src/Services/Pinpoint/Generated/AmazonPinpointConfig.cs
@@ -34,7 +34,7 @@ namespace Amazon.Pinpoint
     public partial class AmazonPinpointConfig : ClientConfig
     {
         private static readonly string UserAgentString =
-            InternalSDKUtils.BuildUserAgentString("Pinpoint", "3.7.301.12");
+            InternalSDKUtils.BuildUserAgentString("Pinpoint", "4.0.0.0");
 
         private static readonly AmazonPinpointEndpointResolver EndpointResolver =
             new AmazonPinpointEndpointResolver();
diff --git a/sdk/src/Services/Pinpoint/Properties/AssemblyInfo.cs b/sdk/src/Services/Pinpoint/Properties/AssemblyInfo.cs
index 34986a48d1a2..a6a24569ea94 100644
--- a/sdk/src/Services/Pinpoint/Properties/AssemblyInfo.cs
+++ b/sdk/src/Services/Pinpoint/Properties/AssemblyInfo.cs
@@ -41,5 +41,9 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.301.12")]
\ No newline at end of file
+#if BCL
+[assembly: AssemblyVersion("4.0")]
+#else
+[assembly: AssemblyVersion("4.0.0.0")]
+#endif
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/src/Services/PinpointEmail/AWSSDK.PinpointEmail.NetFramework.csproj b/sdk/src/Services/PinpointEmail/AWSSDK.PinpointEmail.NetFramework.csproj
index 950d31acc737..cd3d3aedfbff 100644
--- a/sdk/src/Services/PinpointEmail/AWSSDK.PinpointEmail.NetFramework.csproj
+++ b/sdk/src/Services/PinpointEmail/AWSSDK.PinpointEmail.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);BCL;AWS_ASYNC_API;CODE_ANALYSIS</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(RuleSetFileForBuild)' == 'false' Or '$(RuleSetFileForBuild)' == '' ">
diff --git a/sdk/src/Services/PinpointEmail/AWSSDK.PinpointEmail.NetStandard.csproj b/sdk/src/Services/PinpointEmail/AWSSDK.PinpointEmail.NetStandard.csproj
index fd5b529ee587..12d35c5f8f6b 100644
--- a/sdk/src/Services/PinpointEmail/AWSSDK.PinpointEmail.NetStandard.csproj
+++ b/sdk/src/Services/PinpointEmail/AWSSDK.PinpointEmail.NetStandard.csproj
@@ -22,6 +22,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <!-- Async Enumerable Compatibility -->
diff --git a/sdk/src/Services/PinpointEmail/Generated/AmazonPinpointEmailConfig.cs b/sdk/src/Services/PinpointEmail/Generated/AmazonPinpointEmailConfig.cs
index 4a10322e945a..66dfda3f7197 100644
--- a/sdk/src/Services/PinpointEmail/Generated/AmazonPinpointEmailConfig.cs
+++ b/sdk/src/Services/PinpointEmail/Generated/AmazonPinpointEmailConfig.cs
@@ -34,7 +34,7 @@ namespace Amazon.PinpointEmail
     public partial class AmazonPinpointEmailConfig : ClientConfig
     {
         private static readonly string UserAgentString =
-            InternalSDKUtils.BuildUserAgentString("Pinpoint Email", "3.7.300.84");
+            InternalSDKUtils.BuildUserAgentString("Pinpoint Email", "4.0.0.0");
 
         private static readonly AmazonPinpointEmailEndpointResolver EndpointResolver =
             new AmazonPinpointEmailEndpointResolver();
diff --git a/sdk/src/Services/PinpointEmail/Properties/AssemblyInfo.cs b/sdk/src/Services/PinpointEmail/Properties/AssemblyInfo.cs
index 2f21065011f8..1eeaab6b17bd 100644
--- a/sdk/src/Services/PinpointEmail/Properties/AssemblyInfo.cs
+++ b/sdk/src/Services/PinpointEmail/Properties/AssemblyInfo.cs
@@ -41,5 +41,9 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.300.84")]
\ No newline at end of file
+#if BCL
+[assembly: AssemblyVersion("4.0")]
+#else
+[assembly: AssemblyVersion("4.0.0.0")]
+#endif
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/src/Services/PinpointSMSVoice/AWSSDK.PinpointSMSVoice.NetFramework.csproj b/sdk/src/Services/PinpointSMSVoice/AWSSDK.PinpointSMSVoice.NetFramework.csproj
index dc92491c884c..de276bb7aea1 100644
--- a/sdk/src/Services/PinpointSMSVoice/AWSSDK.PinpointSMSVoice.NetFramework.csproj
+++ b/sdk/src/Services/PinpointSMSVoice/AWSSDK.PinpointSMSVoice.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);BCL;AWS_ASYNC_API;CODE_ANALYSIS</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(RuleSetFileForBuild)' == 'false' Or '$(RuleSetFileForBuild)' == '' ">
diff --git a/sdk/src/Services/PinpointSMSVoice/AWSSDK.PinpointSMSVoice.NetStandard.csproj b/sdk/src/Services/PinpointSMSVoice/AWSSDK.PinpointSMSVoice.NetStandard.csproj
index dbc321bd63c7..599b8a0da000 100644
--- a/sdk/src/Services/PinpointSMSVoice/AWSSDK.PinpointSMSVoice.NetStandard.csproj
+++ b/sdk/src/Services/PinpointSMSVoice/AWSSDK.PinpointSMSVoice.NetStandard.csproj
@@ -22,6 +22,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <!-- Async Enumerable Compatibility -->
diff --git a/sdk/src/Services/PinpointSMSVoice/Generated/AmazonPinpointSMSVoiceConfig.cs b/sdk/src/Services/PinpointSMSVoice/Generated/AmazonPinpointSMSVoiceConfig.cs
index dae0495b9883..7f446219c325 100644
--- a/sdk/src/Services/PinpointSMSVoice/Generated/AmazonPinpointSMSVoiceConfig.cs
+++ b/sdk/src/Services/PinpointSMSVoice/Generated/AmazonPinpointSMSVoiceConfig.cs
@@ -34,7 +34,7 @@ namespace Amazon.PinpointSMSVoice
     public partial class AmazonPinpointSMSVoiceConfig : ClientConfig
     {
         private static readonly string UserAgentString =
-            InternalSDKUtils.BuildUserAgentString("Pinpoint SMS Voice", "3.7.300.84");
+            InternalSDKUtils.BuildUserAgentString("Pinpoint SMS Voice", "4.0.0.0");
 
         private static readonly AmazonPinpointSMSVoiceEndpointResolver EndpointResolver =
             new AmazonPinpointSMSVoiceEndpointResolver();
diff --git a/sdk/src/Services/PinpointSMSVoice/Properties/AssemblyInfo.cs b/sdk/src/Services/PinpointSMSVoice/Properties/AssemblyInfo.cs
index 8eec6787a3cd..050f51ccd831 100644
--- a/sdk/src/Services/PinpointSMSVoice/Properties/AssemblyInfo.cs
+++ b/sdk/src/Services/PinpointSMSVoice/Properties/AssemblyInfo.cs
@@ -41,5 +41,9 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.300.84")]
\ No newline at end of file
+#if BCL
+[assembly: AssemblyVersion("4.0")]
+#else
+[assembly: AssemblyVersion("4.0.0.0")]
+#endif
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/src/Services/PinpointSMSVoiceV2/AWSSDK.PinpointSMSVoiceV2.NetFramework.csproj b/sdk/src/Services/PinpointSMSVoiceV2/AWSSDK.PinpointSMSVoiceV2.NetFramework.csproj
index f4062ddf48a0..57151102b457 100644
--- a/sdk/src/Services/PinpointSMSVoiceV2/AWSSDK.PinpointSMSVoiceV2.NetFramework.csproj
+++ b/sdk/src/Services/PinpointSMSVoiceV2/AWSSDK.PinpointSMSVoiceV2.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);BCL;AWS_ASYNC_API;CODE_ANALYSIS</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(RuleSetFileForBuild)' == 'false' Or '$(RuleSetFileForBuild)' == '' ">
diff --git a/sdk/src/Services/PinpointSMSVoiceV2/AWSSDK.PinpointSMSVoiceV2.NetStandard.csproj b/sdk/src/Services/PinpointSMSVoiceV2/AWSSDK.PinpointSMSVoiceV2.NetStandard.csproj
index f90cdc9d7159..b4a23bcaaa68 100644
--- a/sdk/src/Services/PinpointSMSVoiceV2/AWSSDK.PinpointSMSVoiceV2.NetStandard.csproj
+++ b/sdk/src/Services/PinpointSMSVoiceV2/AWSSDK.PinpointSMSVoiceV2.NetStandard.csproj
@@ -22,6 +22,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <!-- Async Enumerable Compatibility -->
diff --git a/sdk/src/Services/PinpointSMSVoiceV2/Generated/AmazonPinpointSMSVoiceV2Config.cs b/sdk/src/Services/PinpointSMSVoiceV2/Generated/AmazonPinpointSMSVoiceV2Config.cs
index 89f43f1510dd..96dc7ef3f942 100644
--- a/sdk/src/Services/PinpointSMSVoiceV2/Generated/AmazonPinpointSMSVoiceV2Config.cs
+++ b/sdk/src/Services/PinpointSMSVoiceV2/Generated/AmazonPinpointSMSVoiceV2Config.cs
@@ -34,7 +34,7 @@ namespace Amazon.PinpointSMSVoiceV2
     public partial class AmazonPinpointSMSVoiceV2Config : ClientConfig
     {
         private static readonly string UserAgentString =
-            InternalSDKUtils.BuildUserAgentString("Pinpoint SMS Voice V2", "3.7.302.0");
+            InternalSDKUtils.BuildUserAgentString("Pinpoint SMS Voice V2", "4.0.0.0");
 
         private static readonly AmazonPinpointSMSVoiceV2EndpointResolver EndpointResolver =
             new AmazonPinpointSMSVoiceV2EndpointResolver();
diff --git a/sdk/src/Services/PinpointSMSVoiceV2/Properties/AssemblyInfo.cs b/sdk/src/Services/PinpointSMSVoiceV2/Properties/AssemblyInfo.cs
index 33dabcfc2b52..24d8e738ce47 100644
--- a/sdk/src/Services/PinpointSMSVoiceV2/Properties/AssemblyInfo.cs
+++ b/sdk/src/Services/PinpointSMSVoiceV2/Properties/AssemblyInfo.cs
@@ -41,5 +41,9 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.302.0")]
\ No newline at end of file
+#if BCL
+[assembly: AssemblyVersion("4.0")]
+#else
+[assembly: AssemblyVersion("4.0.0.0")]
+#endif
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/src/Services/Pipes/AWSSDK.Pipes.NetFramework.csproj b/sdk/src/Services/Pipes/AWSSDK.Pipes.NetFramework.csproj
index 64df3ae2831c..a6cc61eed3c4 100644
--- a/sdk/src/Services/Pipes/AWSSDK.Pipes.NetFramework.csproj
+++ b/sdk/src/Services/Pipes/AWSSDK.Pipes.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);BCL;AWS_ASYNC_API;CODE_ANALYSIS</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(RuleSetFileForBuild)' == 'false' Or '$(RuleSetFileForBuild)' == '' ">
diff --git a/sdk/src/Services/Pipes/AWSSDK.Pipes.NetStandard.csproj b/sdk/src/Services/Pipes/AWSSDK.Pipes.NetStandard.csproj
index aa741d1e534a..de01b27c5e68 100644
--- a/sdk/src/Services/Pipes/AWSSDK.Pipes.NetStandard.csproj
+++ b/sdk/src/Services/Pipes/AWSSDK.Pipes.NetStandard.csproj
@@ -22,6 +22,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <!-- Async Enumerable Compatibility -->
diff --git a/sdk/src/Services/Pipes/Generated/AmazonPipesConfig.cs b/sdk/src/Services/Pipes/Generated/AmazonPipesConfig.cs
index 0ad37978fae7..a59aba811b32 100644
--- a/sdk/src/Services/Pipes/Generated/AmazonPipesConfig.cs
+++ b/sdk/src/Services/Pipes/Generated/AmazonPipesConfig.cs
@@ -34,7 +34,7 @@ namespace Amazon.Pipes
     public partial class AmazonPipesConfig : ClientConfig
     {
         private static readonly string UserAgentString =
-            InternalSDKUtils.BuildUserAgentString("Pipes", "3.7.303.10");
+            InternalSDKUtils.BuildUserAgentString("Pipes", "4.0.0.0");
 
         private static readonly AmazonPipesEndpointResolver EndpointResolver =
             new AmazonPipesEndpointResolver();
diff --git a/sdk/src/Services/Pipes/Properties/AssemblyInfo.cs b/sdk/src/Services/Pipes/Properties/AssemblyInfo.cs
index a141117bd4ba..6441502f04d5 100644
--- a/sdk/src/Services/Pipes/Properties/AssemblyInfo.cs
+++ b/sdk/src/Services/Pipes/Properties/AssemblyInfo.cs
@@ -41,5 +41,9 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.303.10")]
\ No newline at end of file
+#if BCL
+[assembly: AssemblyVersion("4.0")]
+#else
+[assembly: AssemblyVersion("4.0.0.0")]
+#endif
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/src/Services/Polly/AWSSDK.Polly.NetFramework.csproj b/sdk/src/Services/Polly/AWSSDK.Polly.NetFramework.csproj
index f9ec7f8744f6..6cb4ac4df18b 100644
--- a/sdk/src/Services/Polly/AWSSDK.Polly.NetFramework.csproj
+++ b/sdk/src/Services/Polly/AWSSDK.Polly.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);BCL;AWS_ASYNC_API;CODE_ANALYSIS</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(RuleSetFileForBuild)' == 'false' Or '$(RuleSetFileForBuild)' == '' ">
diff --git a/sdk/src/Services/Polly/AWSSDK.Polly.NetStandard.csproj b/sdk/src/Services/Polly/AWSSDK.Polly.NetStandard.csproj
index 1c45d60cca0e..4e6a00ff42eb 100644
--- a/sdk/src/Services/Polly/AWSSDK.Polly.NetStandard.csproj
+++ b/sdk/src/Services/Polly/AWSSDK.Polly.NetStandard.csproj
@@ -22,6 +22,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <!-- Async Enumerable Compatibility -->
diff --git a/sdk/src/Services/Polly/Generated/AmazonPollyConfig.cs b/sdk/src/Services/Polly/Generated/AmazonPollyConfig.cs
index 86604a422938..f3efd7e6ac5a 100644
--- a/sdk/src/Services/Polly/Generated/AmazonPollyConfig.cs
+++ b/sdk/src/Services/Polly/Generated/AmazonPollyConfig.cs
@@ -34,7 +34,7 @@ namespace Amazon.Polly
     public partial class AmazonPollyConfig : ClientConfig
     {
         private static readonly string UserAgentString =
-            InternalSDKUtils.BuildUserAgentString("Polly", "3.7.302.33");
+            InternalSDKUtils.BuildUserAgentString("Polly", "4.0.0.0");
 
         private static readonly AmazonPollyEndpointResolver EndpointResolver =
             new AmazonPollyEndpointResolver();
diff --git a/sdk/src/Services/Polly/Properties/AssemblyInfo.cs b/sdk/src/Services/Polly/Properties/AssemblyInfo.cs
index 687cefc4c273..521e56bbb661 100644
--- a/sdk/src/Services/Polly/Properties/AssemblyInfo.cs
+++ b/sdk/src/Services/Polly/Properties/AssemblyInfo.cs
@@ -41,5 +41,9 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.302.33")]
\ No newline at end of file
+#if BCL
+[assembly: AssemblyVersion("4.0")]
+#else
+[assembly: AssemblyVersion("4.0.0.0")]
+#endif
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/src/Services/Pricing/AWSSDK.Pricing.NetFramework.csproj b/sdk/src/Services/Pricing/AWSSDK.Pricing.NetFramework.csproj
index c72868e4c8df..d5f9ce81977e 100644
--- a/sdk/src/Services/Pricing/AWSSDK.Pricing.NetFramework.csproj
+++ b/sdk/src/Services/Pricing/AWSSDK.Pricing.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);BCL;AWS_ASYNC_API;CODE_ANALYSIS</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(RuleSetFileForBuild)' == 'false' Or '$(RuleSetFileForBuild)' == '' ">
diff --git a/sdk/src/Services/Pricing/AWSSDK.Pricing.NetStandard.csproj b/sdk/src/Services/Pricing/AWSSDK.Pricing.NetStandard.csproj
index 268430bd794b..c952933e45a4 100644
--- a/sdk/src/Services/Pricing/AWSSDK.Pricing.NetStandard.csproj
+++ b/sdk/src/Services/Pricing/AWSSDK.Pricing.NetStandard.csproj
@@ -22,6 +22,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <!-- Async Enumerable Compatibility -->
diff --git a/sdk/src/Services/Pricing/Generated/AmazonPricingConfig.cs b/sdk/src/Services/Pricing/Generated/AmazonPricingConfig.cs
index b0b12bc34c8a..80dc015afb70 100644
--- a/sdk/src/Services/Pricing/Generated/AmazonPricingConfig.cs
+++ b/sdk/src/Services/Pricing/Generated/AmazonPricingConfig.cs
@@ -34,7 +34,7 @@ namespace Amazon.Pricing
     public partial class AmazonPricingConfig : ClientConfig
     {
         private static readonly string UserAgentString =
-            InternalSDKUtils.BuildUserAgentString("Pricing", "3.7.302.24");
+            InternalSDKUtils.BuildUserAgentString("Pricing", "4.0.0.0");
 
         private static readonly AmazonPricingEndpointResolver EndpointResolver =
             new AmazonPricingEndpointResolver();
diff --git a/sdk/src/Services/Pricing/Properties/AssemblyInfo.cs b/sdk/src/Services/Pricing/Properties/AssemblyInfo.cs
index 95b41a98bd52..5d5c3afbc80b 100644
--- a/sdk/src/Services/Pricing/Properties/AssemblyInfo.cs
+++ b/sdk/src/Services/Pricing/Properties/AssemblyInfo.cs
@@ -41,5 +41,9 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.302.24")]
\ No newline at end of file
+#if BCL
+[assembly: AssemblyVersion("4.0")]
+#else
+[assembly: AssemblyVersion("4.0.0.0")]
+#endif
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/src/Services/Private5G/AWSSDK.Private5G.NetFramework.csproj b/sdk/src/Services/Private5G/AWSSDK.Private5G.NetFramework.csproj
index e8345cead2e2..ed39080b1bbc 100644
--- a/sdk/src/Services/Private5G/AWSSDK.Private5G.NetFramework.csproj
+++ b/sdk/src/Services/Private5G/AWSSDK.Private5G.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);BCL;AWS_ASYNC_API;CODE_ANALYSIS</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(RuleSetFileForBuild)' == 'false' Or '$(RuleSetFileForBuild)' == '' ">
diff --git a/sdk/src/Services/Private5G/AWSSDK.Private5G.NetStandard.csproj b/sdk/src/Services/Private5G/AWSSDK.Private5G.NetStandard.csproj
index cb8394ff5417..ef55d7a6140c 100644
--- a/sdk/src/Services/Private5G/AWSSDK.Private5G.NetStandard.csproj
+++ b/sdk/src/Services/Private5G/AWSSDK.Private5G.NetStandard.csproj
@@ -22,6 +22,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <!-- Async Enumerable Compatibility -->
diff --git a/sdk/src/Services/Private5G/Generated/AmazonPrivate5GConfig.cs b/sdk/src/Services/Private5G/Generated/AmazonPrivate5GConfig.cs
index 6cb0b3a8798e..8a61b9577790 100644
--- a/sdk/src/Services/Private5G/Generated/AmazonPrivate5GConfig.cs
+++ b/sdk/src/Services/Private5G/Generated/AmazonPrivate5GConfig.cs
@@ -34,7 +34,7 @@ namespace Amazon.Private5G
     public partial class AmazonPrivate5GConfig : ClientConfig
     {
         private static readonly string UserAgentString =
-            InternalSDKUtils.BuildUserAgentString("PrivateNetworks", "3.7.300.84");
+            InternalSDKUtils.BuildUserAgentString("PrivateNetworks", "4.0.0.0");
 
         private static readonly AmazonPrivate5GEndpointResolver EndpointResolver =
             new AmazonPrivate5GEndpointResolver();
diff --git a/sdk/src/Services/Private5G/Properties/AssemblyInfo.cs b/sdk/src/Services/Private5G/Properties/AssemblyInfo.cs
index d57ce1027b24..5c6569c8e338 100644
--- a/sdk/src/Services/Private5G/Properties/AssemblyInfo.cs
+++ b/sdk/src/Services/Private5G/Properties/AssemblyInfo.cs
@@ -41,5 +41,9 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.300.84")]
\ No newline at end of file
+#if BCL
+[assembly: AssemblyVersion("4.0")]
+#else
+[assembly: AssemblyVersion("4.0.0.0")]
+#endif
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/src/Services/PrometheusService/AWSSDK.PrometheusService.NetFramework.csproj b/sdk/src/Services/PrometheusService/AWSSDK.PrometheusService.NetFramework.csproj
index 7dd9fbff569d..0250f0758624 100644
--- a/sdk/src/Services/PrometheusService/AWSSDK.PrometheusService.NetFramework.csproj
+++ b/sdk/src/Services/PrometheusService/AWSSDK.PrometheusService.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);BCL;AWS_ASYNC_API;CODE_ANALYSIS</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(RuleSetFileForBuild)' == 'false' Or '$(RuleSetFileForBuild)' == '' ">
diff --git a/sdk/src/Services/PrometheusService/AWSSDK.PrometheusService.NetStandard.csproj b/sdk/src/Services/PrometheusService/AWSSDK.PrometheusService.NetStandard.csproj
index dddbf5551b8a..e180d0d98397 100644
--- a/sdk/src/Services/PrometheusService/AWSSDK.PrometheusService.NetStandard.csproj
+++ b/sdk/src/Services/PrometheusService/AWSSDK.PrometheusService.NetStandard.csproj
@@ -22,6 +22,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <!-- Async Enumerable Compatibility -->
diff --git a/sdk/src/Services/PrometheusService/Generated/AmazonPrometheusServiceConfig.cs b/sdk/src/Services/PrometheusService/Generated/AmazonPrometheusServiceConfig.cs
index 2e6a67198188..dc061de8a426 100644
--- a/sdk/src/Services/PrometheusService/Generated/AmazonPrometheusServiceConfig.cs
+++ b/sdk/src/Services/PrometheusService/Generated/AmazonPrometheusServiceConfig.cs
@@ -34,7 +34,7 @@ namespace Amazon.PrometheusService
     public partial class AmazonPrometheusServiceConfig : ClientConfig
     {
         private static readonly string UserAgentString =
-            InternalSDKUtils.BuildUserAgentString("amp", "3.7.302.60");
+            InternalSDKUtils.BuildUserAgentString("amp", "4.0.0.0");
 
         private static readonly AmazonPrometheusServiceEndpointResolver EndpointResolver =
             new AmazonPrometheusServiceEndpointResolver();
diff --git a/sdk/src/Services/PrometheusService/Properties/AssemblyInfo.cs b/sdk/src/Services/PrometheusService/Properties/AssemblyInfo.cs
index 52f22e643460..d1809c0cdcd8 100644
--- a/sdk/src/Services/PrometheusService/Properties/AssemblyInfo.cs
+++ b/sdk/src/Services/PrometheusService/Properties/AssemblyInfo.cs
@@ -41,5 +41,9 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.302.60")]
\ No newline at end of file
+#if BCL
+[assembly: AssemblyVersion("4.0")]
+#else
+[assembly: AssemblyVersion("4.0.0.0")]
+#endif
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/src/Services/Proton/AWSSDK.Proton.NetFramework.csproj b/sdk/src/Services/Proton/AWSSDK.Proton.NetFramework.csproj
index fb6252522ee8..28b680702650 100644
--- a/sdk/src/Services/Proton/AWSSDK.Proton.NetFramework.csproj
+++ b/sdk/src/Services/Proton/AWSSDK.Proton.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);BCL;AWS_ASYNC_API;CODE_ANALYSIS</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(RuleSetFileForBuild)' == 'false' Or '$(RuleSetFileForBuild)' == '' ">
diff --git a/sdk/src/Services/Proton/AWSSDK.Proton.NetStandard.csproj b/sdk/src/Services/Proton/AWSSDK.Proton.NetStandard.csproj
index 3b52ac72abb8..263ce4aeb3f6 100644
--- a/sdk/src/Services/Proton/AWSSDK.Proton.NetStandard.csproj
+++ b/sdk/src/Services/Proton/AWSSDK.Proton.NetStandard.csproj
@@ -22,6 +22,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <!-- Async Enumerable Compatibility -->
diff --git a/sdk/src/Services/Proton/Generated/AmazonProtonConfig.cs b/sdk/src/Services/Proton/Generated/AmazonProtonConfig.cs
index 485de0e70ac7..df1cea33cffd 100644
--- a/sdk/src/Services/Proton/Generated/AmazonProtonConfig.cs
+++ b/sdk/src/Services/Proton/Generated/AmazonProtonConfig.cs
@@ -34,7 +34,7 @@ namespace Amazon.Proton
     public partial class AmazonProtonConfig : ClientConfig
     {
         private static readonly string UserAgentString =
-            InternalSDKUtils.BuildUserAgentString("Proton", "3.7.300.84");
+            InternalSDKUtils.BuildUserAgentString("Proton", "4.0.0.0");
 
         private static readonly AmazonProtonEndpointResolver EndpointResolver =
             new AmazonProtonEndpointResolver();
diff --git a/sdk/src/Services/Proton/Properties/AssemblyInfo.cs b/sdk/src/Services/Proton/Properties/AssemblyInfo.cs
index 2b6b206776f8..2e8a8503ed56 100644
--- a/sdk/src/Services/Proton/Properties/AssemblyInfo.cs
+++ b/sdk/src/Services/Proton/Properties/AssemblyInfo.cs
@@ -41,5 +41,9 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.300.84")]
\ No newline at end of file
+#if BCL
+[assembly: AssemblyVersion("4.0")]
+#else
+[assembly: AssemblyVersion("4.0.0.0")]
+#endif
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/src/Services/QBusiness/AWSSDK.QBusiness.NetFramework.csproj b/sdk/src/Services/QBusiness/AWSSDK.QBusiness.NetFramework.csproj
index 8d81dab7da55..9886e163d8b9 100644
--- a/sdk/src/Services/QBusiness/AWSSDK.QBusiness.NetFramework.csproj
+++ b/sdk/src/Services/QBusiness/AWSSDK.QBusiness.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);BCL;AWS_ASYNC_API;CODE_ANALYSIS</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(RuleSetFileForBuild)' == 'false' Or '$(RuleSetFileForBuild)' == '' ">
diff --git a/sdk/src/Services/QBusiness/AWSSDK.QBusiness.NetStandard.csproj b/sdk/src/Services/QBusiness/AWSSDK.QBusiness.NetStandard.csproj
index be20b3dc9ba2..3bfff9ed898b 100644
--- a/sdk/src/Services/QBusiness/AWSSDK.QBusiness.NetStandard.csproj
+++ b/sdk/src/Services/QBusiness/AWSSDK.QBusiness.NetStandard.csproj
@@ -22,6 +22,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <!-- Async Enumerable Compatibility -->
diff --git a/sdk/src/Services/QBusiness/Generated/AmazonQBusinessConfig.cs b/sdk/src/Services/QBusiness/Generated/AmazonQBusinessConfig.cs
index 0037d8fe8bd0..a8be5ea08ed8 100644
--- a/sdk/src/Services/QBusiness/Generated/AmazonQBusinessConfig.cs
+++ b/sdk/src/Services/QBusiness/Generated/AmazonQBusinessConfig.cs
@@ -34,7 +34,7 @@ namespace Amazon.QBusiness
     public partial class AmazonQBusinessConfig : ClientConfig
     {
         private static readonly string UserAgentString =
-            InternalSDKUtils.BuildUserAgentString("QBusiness", "3.7.303.0");
+            InternalSDKUtils.BuildUserAgentString("QBusiness", "4.0.0.0");
 
         private static readonly AmazonQBusinessEndpointResolver EndpointResolver =
             new AmazonQBusinessEndpointResolver();
diff --git a/sdk/src/Services/QBusiness/Properties/AssemblyInfo.cs b/sdk/src/Services/QBusiness/Properties/AssemblyInfo.cs
index 0ba57f9142fb..be3de986ccb9 100644
--- a/sdk/src/Services/QBusiness/Properties/AssemblyInfo.cs
+++ b/sdk/src/Services/QBusiness/Properties/AssemblyInfo.cs
@@ -41,5 +41,9 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.303.0")]
\ No newline at end of file
+#if BCL
+[assembly: AssemblyVersion("4.0")]
+#else
+[assembly: AssemblyVersion("4.0.0.0")]
+#endif
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/src/Services/QConnect/AWSSDK.QConnect.NetFramework.csproj b/sdk/src/Services/QConnect/AWSSDK.QConnect.NetFramework.csproj
index 49f260052d0f..7ff5a68024e6 100644
--- a/sdk/src/Services/QConnect/AWSSDK.QConnect.NetFramework.csproj
+++ b/sdk/src/Services/QConnect/AWSSDK.QConnect.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);BCL;AWS_ASYNC_API;CODE_ANALYSIS</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(RuleSetFileForBuild)' == 'false' Or '$(RuleSetFileForBuild)' == '' ">
diff --git a/sdk/src/Services/QConnect/AWSSDK.QConnect.NetStandard.csproj b/sdk/src/Services/QConnect/AWSSDK.QConnect.NetStandard.csproj
index 86bbe24c9e59..5ab4f0843315 100644
--- a/sdk/src/Services/QConnect/AWSSDK.QConnect.NetStandard.csproj
+++ b/sdk/src/Services/QConnect/AWSSDK.QConnect.NetStandard.csproj
@@ -22,6 +22,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <!-- Async Enumerable Compatibility -->
diff --git a/sdk/src/Services/QConnect/Generated/AmazonQConnectConfig.cs b/sdk/src/Services/QConnect/Generated/AmazonQConnectConfig.cs
index ba6efa606165..4af2a103c06a 100644
--- a/sdk/src/Services/QConnect/Generated/AmazonQConnectConfig.cs
+++ b/sdk/src/Services/QConnect/Generated/AmazonQConnectConfig.cs
@@ -34,7 +34,7 @@ namespace Amazon.QConnect
     public partial class AmazonQConnectConfig : ClientConfig
     {
         private static readonly string UserAgentString =
-            InternalSDKUtils.BuildUserAgentString("QConnect", "3.7.304.11");
+            InternalSDKUtils.BuildUserAgentString("QConnect", "4.0.0.0");
 
         private static readonly AmazonQConnectEndpointResolver EndpointResolver =
             new AmazonQConnectEndpointResolver();
diff --git a/sdk/src/Services/QConnect/Properties/AssemblyInfo.cs b/sdk/src/Services/QConnect/Properties/AssemblyInfo.cs
index ccac3b7edb9f..30c17a5959c4 100644
--- a/sdk/src/Services/QConnect/Properties/AssemblyInfo.cs
+++ b/sdk/src/Services/QConnect/Properties/AssemblyInfo.cs
@@ -41,5 +41,9 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.304.11")]
\ No newline at end of file
+#if BCL
+[assembly: AssemblyVersion("4.0")]
+#else
+[assembly: AssemblyVersion("4.0.0.0")]
+#endif
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/src/Services/QLDB/AWSSDK.QLDB.NetFramework.csproj b/sdk/src/Services/QLDB/AWSSDK.QLDB.NetFramework.csproj
index 0b6123dcfe5a..16a7135a86f4 100644
--- a/sdk/src/Services/QLDB/AWSSDK.QLDB.NetFramework.csproj
+++ b/sdk/src/Services/QLDB/AWSSDK.QLDB.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);BCL;AWS_ASYNC_API;CODE_ANALYSIS</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(RuleSetFileForBuild)' == 'false' Or '$(RuleSetFileForBuild)' == '' ">
diff --git a/sdk/src/Services/QLDB/AWSSDK.QLDB.NetStandard.csproj b/sdk/src/Services/QLDB/AWSSDK.QLDB.NetStandard.csproj
index 5b5ff3835d80..4aecd01b9f7e 100644
--- a/sdk/src/Services/QLDB/AWSSDK.QLDB.NetStandard.csproj
+++ b/sdk/src/Services/QLDB/AWSSDK.QLDB.NetStandard.csproj
@@ -22,6 +22,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <!-- Async Enumerable Compatibility -->
diff --git a/sdk/src/Services/QLDB/Generated/AmazonQLDBConfig.cs b/sdk/src/Services/QLDB/Generated/AmazonQLDBConfig.cs
index e5662e6fedb6..043e048fa71c 100644
--- a/sdk/src/Services/QLDB/Generated/AmazonQLDBConfig.cs
+++ b/sdk/src/Services/QLDB/Generated/AmazonQLDBConfig.cs
@@ -34,7 +34,7 @@ namespace Amazon.QLDB
     public partial class AmazonQLDBConfig : ClientConfig
     {
         private static readonly string UserAgentString =
-            InternalSDKUtils.BuildUserAgentString("QLDB", "3.7.300.85");
+            InternalSDKUtils.BuildUserAgentString("QLDB", "4.0.0.0");
 
         private static readonly AmazonQLDBEndpointResolver EndpointResolver =
             new AmazonQLDBEndpointResolver();
diff --git a/sdk/src/Services/QLDB/Properties/AssemblyInfo.cs b/sdk/src/Services/QLDB/Properties/AssemblyInfo.cs
index e749ddc51a71..b6497a07422d 100644
--- a/sdk/src/Services/QLDB/Properties/AssemblyInfo.cs
+++ b/sdk/src/Services/QLDB/Properties/AssemblyInfo.cs
@@ -41,5 +41,9 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.300.85")]
\ No newline at end of file
+#if BCL
+[assembly: AssemblyVersion("4.0")]
+#else
+[assembly: AssemblyVersion("4.0.0.0")]
+#endif
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/src/Services/QLDBSession/AWSSDK.QLDBSession.NetFramework.csproj b/sdk/src/Services/QLDBSession/AWSSDK.QLDBSession.NetFramework.csproj
index 8e012df38601..f2f9005b1382 100644
--- a/sdk/src/Services/QLDBSession/AWSSDK.QLDBSession.NetFramework.csproj
+++ b/sdk/src/Services/QLDBSession/AWSSDK.QLDBSession.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);BCL;AWS_ASYNC_API;CODE_ANALYSIS</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(RuleSetFileForBuild)' == 'false' Or '$(RuleSetFileForBuild)' == '' ">
diff --git a/sdk/src/Services/QLDBSession/AWSSDK.QLDBSession.NetStandard.csproj b/sdk/src/Services/QLDBSession/AWSSDK.QLDBSession.NetStandard.csproj
index d06bd9eebe00..2660adf310c0 100644
--- a/sdk/src/Services/QLDBSession/AWSSDK.QLDBSession.NetStandard.csproj
+++ b/sdk/src/Services/QLDBSession/AWSSDK.QLDBSession.NetStandard.csproj
@@ -22,6 +22,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <!-- Async Enumerable Compatibility -->
diff --git a/sdk/src/Services/QLDBSession/Generated/AmazonQLDBSessionConfig.cs b/sdk/src/Services/QLDBSession/Generated/AmazonQLDBSessionConfig.cs
index 7ac36a8289e6..841c148bc0ab 100644
--- a/sdk/src/Services/QLDBSession/Generated/AmazonQLDBSessionConfig.cs
+++ b/sdk/src/Services/QLDBSession/Generated/AmazonQLDBSessionConfig.cs
@@ -34,7 +34,7 @@ namespace Amazon.QLDBSession
     public partial class AmazonQLDBSessionConfig : ClientConfig
     {
         private static readonly string UserAgentString =
-            InternalSDKUtils.BuildUserAgentString("QLDB Session", "3.7.300.84");
+            InternalSDKUtils.BuildUserAgentString("QLDB Session", "4.0.0.0");
 
         private static readonly AmazonQLDBSessionEndpointResolver EndpointResolver =
             new AmazonQLDBSessionEndpointResolver();
diff --git a/sdk/src/Services/QLDBSession/Properties/AssemblyInfo.cs b/sdk/src/Services/QLDBSession/Properties/AssemblyInfo.cs
index 4b1042fbdf7d..cf243dd0dd90 100644
--- a/sdk/src/Services/QLDBSession/Properties/AssemblyInfo.cs
+++ b/sdk/src/Services/QLDBSession/Properties/AssemblyInfo.cs
@@ -41,5 +41,9 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.300.84")]
\ No newline at end of file
+#if BCL
+[assembly: AssemblyVersion("4.0")]
+#else
+[assembly: AssemblyVersion("4.0.0.0")]
+#endif
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/src/Services/QuickSight/AWSSDK.QuickSight.NetFramework.csproj b/sdk/src/Services/QuickSight/AWSSDK.QuickSight.NetFramework.csproj
index 3a01a1a4a649..eda22d32eed5 100644
--- a/sdk/src/Services/QuickSight/AWSSDK.QuickSight.NetFramework.csproj
+++ b/sdk/src/Services/QuickSight/AWSSDK.QuickSight.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);BCL;AWS_ASYNC_API;CODE_ANALYSIS</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(RuleSetFileForBuild)' == 'false' Or '$(RuleSetFileForBuild)' == '' ">
diff --git a/sdk/src/Services/QuickSight/AWSSDK.QuickSight.NetStandard.csproj b/sdk/src/Services/QuickSight/AWSSDK.QuickSight.NetStandard.csproj
index 53ee300f947d..c704245dcd46 100644
--- a/sdk/src/Services/QuickSight/AWSSDK.QuickSight.NetStandard.csproj
+++ b/sdk/src/Services/QuickSight/AWSSDK.QuickSight.NetStandard.csproj
@@ -22,6 +22,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <!-- Async Enumerable Compatibility -->
diff --git a/sdk/src/Services/QuickSight/Generated/AmazonQuickSightConfig.cs b/sdk/src/Services/QuickSight/Generated/AmazonQuickSightConfig.cs
index f3094ca4cc59..4801f90db70a 100644
--- a/sdk/src/Services/QuickSight/Generated/AmazonQuickSightConfig.cs
+++ b/sdk/src/Services/QuickSight/Generated/AmazonQuickSightConfig.cs
@@ -34,7 +34,7 @@ namespace Amazon.QuickSight
     public partial class AmazonQuickSightConfig : ClientConfig
     {
         private static readonly string UserAgentString =
-            InternalSDKUtils.BuildUserAgentString("QuickSight", "3.7.310.0");
+            InternalSDKUtils.BuildUserAgentString("QuickSight", "4.0.0.0");
 
         private static readonly AmazonQuickSightEndpointResolver EndpointResolver =
             new AmazonQuickSightEndpointResolver();
diff --git a/sdk/src/Services/QuickSight/Properties/AssemblyInfo.cs b/sdk/src/Services/QuickSight/Properties/AssemblyInfo.cs
index dfbd11cde584..d2fbf58701de 100644
--- a/sdk/src/Services/QuickSight/Properties/AssemblyInfo.cs
+++ b/sdk/src/Services/QuickSight/Properties/AssemblyInfo.cs
@@ -41,5 +41,9 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.310.0")]
\ No newline at end of file
+#if BCL
+[assembly: AssemblyVersion("4.0")]
+#else
+[assembly: AssemblyVersion("4.0.0.0")]
+#endif
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/src/Services/RAM/AWSSDK.RAM.NetFramework.csproj b/sdk/src/Services/RAM/AWSSDK.RAM.NetFramework.csproj
index de43e36d2952..5c860625f58b 100644
--- a/sdk/src/Services/RAM/AWSSDK.RAM.NetFramework.csproj
+++ b/sdk/src/Services/RAM/AWSSDK.RAM.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);BCL;AWS_ASYNC_API;CODE_ANALYSIS</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(RuleSetFileForBuild)' == 'false' Or '$(RuleSetFileForBuild)' == '' ">
diff --git a/sdk/src/Services/RAM/AWSSDK.RAM.NetStandard.csproj b/sdk/src/Services/RAM/AWSSDK.RAM.NetStandard.csproj
index 25c256616f76..c5fe1bf7dd9e 100644
--- a/sdk/src/Services/RAM/AWSSDK.RAM.NetStandard.csproj
+++ b/sdk/src/Services/RAM/AWSSDK.RAM.NetStandard.csproj
@@ -22,6 +22,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <!-- Async Enumerable Compatibility -->
diff --git a/sdk/src/Services/RAM/Generated/AmazonRAMConfig.cs b/sdk/src/Services/RAM/Generated/AmazonRAMConfig.cs
index 3dac9178c3e9..11910856a787 100644
--- a/sdk/src/Services/RAM/Generated/AmazonRAMConfig.cs
+++ b/sdk/src/Services/RAM/Generated/AmazonRAMConfig.cs
@@ -34,7 +34,7 @@ namespace Amazon.RAM
     public partial class AmazonRAMConfig : ClientConfig
     {
         private static readonly string UserAgentString =
-            InternalSDKUtils.BuildUserAgentString("RAM", "3.7.300.84");
+            InternalSDKUtils.BuildUserAgentString("RAM", "4.0.0.0");
 
         private static readonly AmazonRAMEndpointResolver EndpointResolver =
             new AmazonRAMEndpointResolver();
diff --git a/sdk/src/Services/RAM/Properties/AssemblyInfo.cs b/sdk/src/Services/RAM/Properties/AssemblyInfo.cs
index 9d851f454936..8c961719f002 100644
--- a/sdk/src/Services/RAM/Properties/AssemblyInfo.cs
+++ b/sdk/src/Services/RAM/Properties/AssemblyInfo.cs
@@ -41,5 +41,9 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.300.84")]
\ No newline at end of file
+#if BCL
+[assembly: AssemblyVersion("4.0")]
+#else
+[assembly: AssemblyVersion("4.0.0.0")]
+#endif
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/src/Services/RDS/AWSSDK.RDS.NetFramework.csproj b/sdk/src/Services/RDS/AWSSDK.RDS.NetFramework.csproj
index a2ba2b053234..880936127843 100644
--- a/sdk/src/Services/RDS/AWSSDK.RDS.NetFramework.csproj
+++ b/sdk/src/Services/RDS/AWSSDK.RDS.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);BCL;AWS_ASYNC_API;CODE_ANALYSIS</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(RuleSetFileForBuild)' == 'false' Or '$(RuleSetFileForBuild)' == '' ">
diff --git a/sdk/src/Services/RDS/AWSSDK.RDS.NetStandard.csproj b/sdk/src/Services/RDS/AWSSDK.RDS.NetStandard.csproj
index 45c8e67a687a..d4da32e89bdc 100644
--- a/sdk/src/Services/RDS/AWSSDK.RDS.NetStandard.csproj
+++ b/sdk/src/Services/RDS/AWSSDK.RDS.NetStandard.csproj
@@ -22,6 +22,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <!-- Async Enumerable Compatibility -->
diff --git a/sdk/src/Services/RDS/Generated/AmazonRDSConfig.cs b/sdk/src/Services/RDS/Generated/AmazonRDSConfig.cs
index 84d51f6cf4df..e239bb276b02 100644
--- a/sdk/src/Services/RDS/Generated/AmazonRDSConfig.cs
+++ b/sdk/src/Services/RDS/Generated/AmazonRDSConfig.cs
@@ -34,7 +34,7 @@ namespace Amazon.RDS
     public partial class AmazonRDSConfig : ClientConfig
     {
         private static readonly string UserAgentString =
-            InternalSDKUtils.BuildUserAgentString("RDS", "3.7.312.1");
+            InternalSDKUtils.BuildUserAgentString("RDS", "4.0.0.0");
 
         private static readonly AmazonRDSEndpointResolver EndpointResolver =
             new AmazonRDSEndpointResolver();
diff --git a/sdk/src/Services/RDS/Properties/AssemblyInfo.cs b/sdk/src/Services/RDS/Properties/AssemblyInfo.cs
index 9c82f0f518dd..81a8a0623c7c 100644
--- a/sdk/src/Services/RDS/Properties/AssemblyInfo.cs
+++ b/sdk/src/Services/RDS/Properties/AssemblyInfo.cs
@@ -41,5 +41,9 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.312.1")]
\ No newline at end of file
+#if BCL
+[assembly: AssemblyVersion("4.0")]
+#else
+[assembly: AssemblyVersion("4.0.0.0")]
+#endif
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/src/Services/RDSDataService/AWSSDK.RDSDataService.NetFramework.csproj b/sdk/src/Services/RDSDataService/AWSSDK.RDSDataService.NetFramework.csproj
index a7d3b055a585..d845bfcd322a 100644
--- a/sdk/src/Services/RDSDataService/AWSSDK.RDSDataService.NetFramework.csproj
+++ b/sdk/src/Services/RDSDataService/AWSSDK.RDSDataService.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);BCL;AWS_ASYNC_API;CODE_ANALYSIS</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(RuleSetFileForBuild)' == 'false' Or '$(RuleSetFileForBuild)' == '' ">
diff --git a/sdk/src/Services/RDSDataService/AWSSDK.RDSDataService.NetStandard.csproj b/sdk/src/Services/RDSDataService/AWSSDK.RDSDataService.NetStandard.csproj
index d0de8ddb1c83..c455d5a5b075 100644
--- a/sdk/src/Services/RDSDataService/AWSSDK.RDSDataService.NetStandard.csproj
+++ b/sdk/src/Services/RDSDataService/AWSSDK.RDSDataService.NetStandard.csproj
@@ -22,6 +22,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <!-- Async Enumerable Compatibility -->
diff --git a/sdk/src/Services/RDSDataService/Generated/AmazonRDSDataServiceConfig.cs b/sdk/src/Services/RDSDataService/Generated/AmazonRDSDataServiceConfig.cs
index 41672a0769e9..d8f573634b9b 100644
--- a/sdk/src/Services/RDSDataService/Generated/AmazonRDSDataServiceConfig.cs
+++ b/sdk/src/Services/RDSDataService/Generated/AmazonRDSDataServiceConfig.cs
@@ -34,7 +34,7 @@ namespace Amazon.RDSDataService
     public partial class AmazonRDSDataServiceConfig : ClientConfig
     {
         private static readonly string UserAgentString =
-            InternalSDKUtils.BuildUserAgentString("RDS Data", "3.7.301.60");
+            InternalSDKUtils.BuildUserAgentString("RDS Data", "4.0.0.0");
 
         private static readonly AmazonRDSDataServiceEndpointResolver EndpointResolver =
             new AmazonRDSDataServiceEndpointResolver();
diff --git a/sdk/src/Services/RDSDataService/Properties/AssemblyInfo.cs b/sdk/src/Services/RDSDataService/Properties/AssemblyInfo.cs
index b59893fe3fdb..71900ccf44fe 100644
--- a/sdk/src/Services/RDSDataService/Properties/AssemblyInfo.cs
+++ b/sdk/src/Services/RDSDataService/Properties/AssemblyInfo.cs
@@ -41,5 +41,9 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.301.60")]
\ No newline at end of file
+#if BCL
+[assembly: AssemblyVersion("4.0")]
+#else
+[assembly: AssemblyVersion("4.0.0.0")]
+#endif
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/src/Services/RecycleBin/AWSSDK.RecycleBin.NetFramework.csproj b/sdk/src/Services/RecycleBin/AWSSDK.RecycleBin.NetFramework.csproj
index 1195cd0d1f4e..3ac223f43006 100644
--- a/sdk/src/Services/RecycleBin/AWSSDK.RecycleBin.NetFramework.csproj
+++ b/sdk/src/Services/RecycleBin/AWSSDK.RecycleBin.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);BCL;AWS_ASYNC_API;CODE_ANALYSIS</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(RuleSetFileForBuild)' == 'false' Or '$(RuleSetFileForBuild)' == '' ">
diff --git a/sdk/src/Services/RecycleBin/AWSSDK.RecycleBin.NetStandard.csproj b/sdk/src/Services/RecycleBin/AWSSDK.RecycleBin.NetStandard.csproj
index 33510660583a..6691378f50d7 100644
--- a/sdk/src/Services/RecycleBin/AWSSDK.RecycleBin.NetStandard.csproj
+++ b/sdk/src/Services/RecycleBin/AWSSDK.RecycleBin.NetStandard.csproj
@@ -22,6 +22,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <!-- Async Enumerable Compatibility -->
diff --git a/sdk/src/Services/RecycleBin/Generated/AmazonRecycleBinConfig.cs b/sdk/src/Services/RecycleBin/Generated/AmazonRecycleBinConfig.cs
index 9afdabc1f84b..c3d2a40fae6a 100644
--- a/sdk/src/Services/RecycleBin/Generated/AmazonRecycleBinConfig.cs
+++ b/sdk/src/Services/RecycleBin/Generated/AmazonRecycleBinConfig.cs
@@ -34,7 +34,7 @@ namespace Amazon.RecycleBin
     public partial class AmazonRecycleBinConfig : ClientConfig
     {
         private static readonly string UserAgentString =
-            InternalSDKUtils.BuildUserAgentString("rbin", "3.7.301.72");
+            InternalSDKUtils.BuildUserAgentString("rbin", "4.0.0.0");
 
         private static readonly AmazonRecycleBinEndpointResolver EndpointResolver =
             new AmazonRecycleBinEndpointResolver();
diff --git a/sdk/src/Services/RecycleBin/Properties/AssemblyInfo.cs b/sdk/src/Services/RecycleBin/Properties/AssemblyInfo.cs
index 3a91e803d284..e0fa1471bfaf 100644
--- a/sdk/src/Services/RecycleBin/Properties/AssemblyInfo.cs
+++ b/sdk/src/Services/RecycleBin/Properties/AssemblyInfo.cs
@@ -41,5 +41,9 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.301.72")]
\ No newline at end of file
+#if BCL
+[assembly: AssemblyVersion("4.0")]
+#else
+[assembly: AssemblyVersion("4.0.0.0")]
+#endif
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/src/Services/Redshift/AWSSDK.Redshift.NetFramework.csproj b/sdk/src/Services/Redshift/AWSSDK.Redshift.NetFramework.csproj
index 8c5edb096314..6863fef14b79 100644
--- a/sdk/src/Services/Redshift/AWSSDK.Redshift.NetFramework.csproj
+++ b/sdk/src/Services/Redshift/AWSSDK.Redshift.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);BCL;AWS_ASYNC_API;CODE_ANALYSIS</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(RuleSetFileForBuild)' == 'false' Or '$(RuleSetFileForBuild)' == '' ">
diff --git a/sdk/src/Services/Redshift/AWSSDK.Redshift.NetStandard.csproj b/sdk/src/Services/Redshift/AWSSDK.Redshift.NetStandard.csproj
index 148d8707a746..c09eeb9d11b8 100644
--- a/sdk/src/Services/Redshift/AWSSDK.Redshift.NetStandard.csproj
+++ b/sdk/src/Services/Redshift/AWSSDK.Redshift.NetStandard.csproj
@@ -22,6 +22,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <!-- Async Enumerable Compatibility -->
diff --git a/sdk/src/Services/Redshift/Generated/AmazonRedshiftConfig.cs b/sdk/src/Services/Redshift/Generated/AmazonRedshiftConfig.cs
index ad31e1fc0653..30c83168bce2 100644
--- a/sdk/src/Services/Redshift/Generated/AmazonRedshiftConfig.cs
+++ b/sdk/src/Services/Redshift/Generated/AmazonRedshiftConfig.cs
@@ -34,7 +34,7 @@ namespace Amazon.Redshift
     public partial class AmazonRedshiftConfig : ClientConfig
     {
         private static readonly string UserAgentString =
-            InternalSDKUtils.BuildUserAgentString("Redshift", "3.7.305.10");
+            InternalSDKUtils.BuildUserAgentString("Redshift", "4.0.0.0");
 
         private static readonly AmazonRedshiftEndpointResolver EndpointResolver =
             new AmazonRedshiftEndpointResolver();
diff --git a/sdk/src/Services/Redshift/Properties/AssemblyInfo.cs b/sdk/src/Services/Redshift/Properties/AssemblyInfo.cs
index 0976cd25593f..734717bb6a2b 100644
--- a/sdk/src/Services/Redshift/Properties/AssemblyInfo.cs
+++ b/sdk/src/Services/Redshift/Properties/AssemblyInfo.cs
@@ -41,5 +41,9 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.305.10")]
\ No newline at end of file
+#if BCL
+[assembly: AssemblyVersion("4.0")]
+#else
+[assembly: AssemblyVersion("4.0.0.0")]
+#endif
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/src/Services/RedshiftDataAPIService/AWSSDK.RedshiftDataAPIService.NetFramework.csproj b/sdk/src/Services/RedshiftDataAPIService/AWSSDK.RedshiftDataAPIService.NetFramework.csproj
index 52736cc83a0c..370ef0174031 100644
--- a/sdk/src/Services/RedshiftDataAPIService/AWSSDK.RedshiftDataAPIService.NetFramework.csproj
+++ b/sdk/src/Services/RedshiftDataAPIService/AWSSDK.RedshiftDataAPIService.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);BCL;AWS_ASYNC_API;CODE_ANALYSIS</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(RuleSetFileForBuild)' == 'false' Or '$(RuleSetFileForBuild)' == '' ">
diff --git a/sdk/src/Services/RedshiftDataAPIService/AWSSDK.RedshiftDataAPIService.NetStandard.csproj b/sdk/src/Services/RedshiftDataAPIService/AWSSDK.RedshiftDataAPIService.NetStandard.csproj
index 3d799fa557c6..d44a4618e4ec 100644
--- a/sdk/src/Services/RedshiftDataAPIService/AWSSDK.RedshiftDataAPIService.NetStandard.csproj
+++ b/sdk/src/Services/RedshiftDataAPIService/AWSSDK.RedshiftDataAPIService.NetStandard.csproj
@@ -22,6 +22,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <!-- Async Enumerable Compatibility -->
diff --git a/sdk/src/Services/RedshiftDataAPIService/Generated/AmazonRedshiftDataAPIServiceConfig.cs b/sdk/src/Services/RedshiftDataAPIService/Generated/AmazonRedshiftDataAPIServiceConfig.cs
index 7e45a45207e2..e679684cc994 100644
--- a/sdk/src/Services/RedshiftDataAPIService/Generated/AmazonRedshiftDataAPIServiceConfig.cs
+++ b/sdk/src/Services/RedshiftDataAPIService/Generated/AmazonRedshiftDataAPIServiceConfig.cs
@@ -34,7 +34,7 @@ namespace Amazon.RedshiftDataAPIService
     public partial class AmazonRedshiftDataAPIServiceConfig : ClientConfig
     {
         private static readonly string UserAgentString =
-            InternalSDKUtils.BuildUserAgentString("Redshift Data", "3.7.300.84");
+            InternalSDKUtils.BuildUserAgentString("Redshift Data", "4.0.0.0");
 
         private static readonly AmazonRedshiftDataAPIServiceEndpointResolver EndpointResolver =
             new AmazonRedshiftDataAPIServiceEndpointResolver();
diff --git a/sdk/src/Services/RedshiftDataAPIService/Properties/AssemblyInfo.cs b/sdk/src/Services/RedshiftDataAPIService/Properties/AssemblyInfo.cs
index abf34fe1fead..61524a6dd343 100644
--- a/sdk/src/Services/RedshiftDataAPIService/Properties/AssemblyInfo.cs
+++ b/sdk/src/Services/RedshiftDataAPIService/Properties/AssemblyInfo.cs
@@ -41,5 +41,9 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.300.84")]
\ No newline at end of file
+#if BCL
+[assembly: AssemblyVersion("4.0")]
+#else
+[assembly: AssemblyVersion("4.0.0.0")]
+#endif
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/src/Services/RedshiftServerless/AWSSDK.RedshiftServerless.NetFramework.csproj b/sdk/src/Services/RedshiftServerless/AWSSDK.RedshiftServerless.NetFramework.csproj
index 7dcbbbcdc178..a35c6f2a3eb5 100644
--- a/sdk/src/Services/RedshiftServerless/AWSSDK.RedshiftServerless.NetFramework.csproj
+++ b/sdk/src/Services/RedshiftServerless/AWSSDK.RedshiftServerless.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);BCL;AWS_ASYNC_API;CODE_ANALYSIS</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(RuleSetFileForBuild)' == 'false' Or '$(RuleSetFileForBuild)' == '' ">
diff --git a/sdk/src/Services/RedshiftServerless/AWSSDK.RedshiftServerless.NetStandard.csproj b/sdk/src/Services/RedshiftServerless/AWSSDK.RedshiftServerless.NetStandard.csproj
index 18d3cd55d9bd..9685fbf58c9b 100644
--- a/sdk/src/Services/RedshiftServerless/AWSSDK.RedshiftServerless.NetStandard.csproj
+++ b/sdk/src/Services/RedshiftServerless/AWSSDK.RedshiftServerless.NetStandard.csproj
@@ -22,6 +22,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <!-- Async Enumerable Compatibility -->
diff --git a/sdk/src/Services/RedshiftServerless/Generated/AmazonRedshiftServerlessConfig.cs b/sdk/src/Services/RedshiftServerless/Generated/AmazonRedshiftServerlessConfig.cs
index 9cff62756416..76235d65744a 100644
--- a/sdk/src/Services/RedshiftServerless/Generated/AmazonRedshiftServerlessConfig.cs
+++ b/sdk/src/Services/RedshiftServerless/Generated/AmazonRedshiftServerlessConfig.cs
@@ -34,7 +34,7 @@ namespace Amazon.RedshiftServerless
     public partial class AmazonRedshiftServerlessConfig : ClientConfig
     {
         private static readonly string UserAgentString =
-            InternalSDKUtils.BuildUserAgentString("Redshift Serverless", "3.7.302.72");
+            InternalSDKUtils.BuildUserAgentString("Redshift Serverless", "4.0.0.0");
 
         private static readonly AmazonRedshiftServerlessEndpointResolver EndpointResolver =
             new AmazonRedshiftServerlessEndpointResolver();
diff --git a/sdk/src/Services/RedshiftServerless/Properties/AssemblyInfo.cs b/sdk/src/Services/RedshiftServerless/Properties/AssemblyInfo.cs
index 4ed751fbc0b3..47f710e6ab08 100644
--- a/sdk/src/Services/RedshiftServerless/Properties/AssemblyInfo.cs
+++ b/sdk/src/Services/RedshiftServerless/Properties/AssemblyInfo.cs
@@ -41,5 +41,9 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.302.72")]
\ No newline at end of file
+#if BCL
+[assembly: AssemblyVersion("4.0")]
+#else
+[assembly: AssemblyVersion("4.0.0.0")]
+#endif
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/src/Services/Rekognition/AWSSDK.Rekognition.NetFramework.csproj b/sdk/src/Services/Rekognition/AWSSDK.Rekognition.NetFramework.csproj
index 93adac8a16b3..b28127a68ec9 100644
--- a/sdk/src/Services/Rekognition/AWSSDK.Rekognition.NetFramework.csproj
+++ b/sdk/src/Services/Rekognition/AWSSDK.Rekognition.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);BCL;AWS_ASYNC_API;CODE_ANALYSIS</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(RuleSetFileForBuild)' == 'false' Or '$(RuleSetFileForBuild)' == '' ">
diff --git a/sdk/src/Services/Rekognition/AWSSDK.Rekognition.NetStandard.csproj b/sdk/src/Services/Rekognition/AWSSDK.Rekognition.NetStandard.csproj
index bb9d6888f83d..312fc5866d22 100644
--- a/sdk/src/Services/Rekognition/AWSSDK.Rekognition.NetStandard.csproj
+++ b/sdk/src/Services/Rekognition/AWSSDK.Rekognition.NetStandard.csproj
@@ -22,6 +22,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <!-- Async Enumerable Compatibility -->
diff --git a/sdk/src/Services/Rekognition/Generated/AmazonRekognitionConfig.cs b/sdk/src/Services/Rekognition/Generated/AmazonRekognitionConfig.cs
index d644c9a61253..ffaa2c17b2c1 100644
--- a/sdk/src/Services/Rekognition/Generated/AmazonRekognitionConfig.cs
+++ b/sdk/src/Services/Rekognition/Generated/AmazonRekognitionConfig.cs
@@ -34,7 +34,7 @@ namespace Amazon.Rekognition
     public partial class AmazonRekognitionConfig : ClientConfig
     {
         private static readonly string UserAgentString =
-            InternalSDKUtils.BuildUserAgentString("Rekognition", "3.7.302.11");
+            InternalSDKUtils.BuildUserAgentString("Rekognition", "4.0.0.0");
 
         private static readonly AmazonRekognitionEndpointResolver EndpointResolver =
             new AmazonRekognitionEndpointResolver();
diff --git a/sdk/src/Services/Rekognition/Properties/AssemblyInfo.cs b/sdk/src/Services/Rekognition/Properties/AssemblyInfo.cs
index 3288b8846607..a782ba84a78c 100644
--- a/sdk/src/Services/Rekognition/Properties/AssemblyInfo.cs
+++ b/sdk/src/Services/Rekognition/Properties/AssemblyInfo.cs
@@ -41,5 +41,9 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.302.11")]
\ No newline at end of file
+#if BCL
+[assembly: AssemblyVersion("4.0")]
+#else
+[assembly: AssemblyVersion("4.0.0.0")]
+#endif
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/src/Services/Repostspace/AWSSDK.Repostspace.NetFramework.csproj b/sdk/src/Services/Repostspace/AWSSDK.Repostspace.NetFramework.csproj
index dded07f7ca08..75c1f7d0cedc 100644
--- a/sdk/src/Services/Repostspace/AWSSDK.Repostspace.NetFramework.csproj
+++ b/sdk/src/Services/Repostspace/AWSSDK.Repostspace.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);BCL;AWS_ASYNC_API;CODE_ANALYSIS</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(RuleSetFileForBuild)' == 'false' Or '$(RuleSetFileForBuild)' == '' ">
diff --git a/sdk/src/Services/Repostspace/AWSSDK.Repostspace.NetStandard.csproj b/sdk/src/Services/Repostspace/AWSSDK.Repostspace.NetStandard.csproj
index 077ba318e16c..9f76acbd6349 100644
--- a/sdk/src/Services/Repostspace/AWSSDK.Repostspace.NetStandard.csproj
+++ b/sdk/src/Services/Repostspace/AWSSDK.Repostspace.NetStandard.csproj
@@ -22,6 +22,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <!-- Async Enumerable Compatibility -->
diff --git a/sdk/src/Services/Repostspace/Generated/AmazonRepostspaceConfig.cs b/sdk/src/Services/Repostspace/Generated/AmazonRepostspaceConfig.cs
index e5077b0770c2..e75d810f3ea6 100644
--- a/sdk/src/Services/Repostspace/Generated/AmazonRepostspaceConfig.cs
+++ b/sdk/src/Services/Repostspace/Generated/AmazonRepostspaceConfig.cs
@@ -34,7 +34,7 @@ namespace Amazon.Repostspace
     public partial class AmazonRepostspaceConfig : ClientConfig
     {
         private static readonly string UserAgentString =
-            InternalSDKUtils.BuildUserAgentString("repostspace", "3.7.300.76");
+            InternalSDKUtils.BuildUserAgentString("repostspace", "4.0.0.0");
 
         private static readonly AmazonRepostspaceEndpointResolver EndpointResolver =
             new AmazonRepostspaceEndpointResolver();
diff --git a/sdk/src/Services/Repostspace/Properties/AssemblyInfo.cs b/sdk/src/Services/Repostspace/Properties/AssemblyInfo.cs
index 5b22fabf0b19..746c61b3166f 100644
--- a/sdk/src/Services/Repostspace/Properties/AssemblyInfo.cs
+++ b/sdk/src/Services/Repostspace/Properties/AssemblyInfo.cs
@@ -41,5 +41,9 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.300.76")]
\ No newline at end of file
+#if BCL
+[assembly: AssemblyVersion("4.0")]
+#else
+[assembly: AssemblyVersion("4.0.0.0")]
+#endif
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/src/Services/ResilienceHub/AWSSDK.ResilienceHub.NetFramework.csproj b/sdk/src/Services/ResilienceHub/AWSSDK.ResilienceHub.NetFramework.csproj
index 8270b6067188..d08f05cb8923 100644
--- a/sdk/src/Services/ResilienceHub/AWSSDK.ResilienceHub.NetFramework.csproj
+++ b/sdk/src/Services/ResilienceHub/AWSSDK.ResilienceHub.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);BCL;AWS_ASYNC_API;CODE_ANALYSIS</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(RuleSetFileForBuild)' == 'false' Or '$(RuleSetFileForBuild)' == '' ">
diff --git a/sdk/src/Services/ResilienceHub/AWSSDK.ResilienceHub.NetStandard.csproj b/sdk/src/Services/ResilienceHub/AWSSDK.ResilienceHub.NetStandard.csproj
index c51bf9014b75..336eb5454ef0 100644
--- a/sdk/src/Services/ResilienceHub/AWSSDK.ResilienceHub.NetStandard.csproj
+++ b/sdk/src/Services/ResilienceHub/AWSSDK.ResilienceHub.NetStandard.csproj
@@ -22,6 +22,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <!-- Async Enumerable Compatibility -->
diff --git a/sdk/src/Services/ResilienceHub/Generated/AmazonResilienceHubConfig.cs b/sdk/src/Services/ResilienceHub/Generated/AmazonResilienceHubConfig.cs
index ce186d52efd6..f6f0330a8daf 100644
--- a/sdk/src/Services/ResilienceHub/Generated/AmazonResilienceHubConfig.cs
+++ b/sdk/src/Services/ResilienceHub/Generated/AmazonResilienceHubConfig.cs
@@ -34,7 +34,7 @@ namespace Amazon.ResilienceHub
     public partial class AmazonResilienceHubConfig : ClientConfig
     {
         private static readonly string UserAgentString =
-            InternalSDKUtils.BuildUserAgentString("resiliencehub", "3.7.300.84");
+            InternalSDKUtils.BuildUserAgentString("resiliencehub", "4.0.0.0");
 
         private static readonly AmazonResilienceHubEndpointResolver EndpointResolver =
             new AmazonResilienceHubEndpointResolver();
diff --git a/sdk/src/Services/ResilienceHub/Properties/AssemblyInfo.cs b/sdk/src/Services/ResilienceHub/Properties/AssemblyInfo.cs
index 4bf555d6d7c3..198af926fcb3 100644
--- a/sdk/src/Services/ResilienceHub/Properties/AssemblyInfo.cs
+++ b/sdk/src/Services/ResilienceHub/Properties/AssemblyInfo.cs
@@ -41,5 +41,9 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.300.84")]
\ No newline at end of file
+#if BCL
+[assembly: AssemblyVersion("4.0")]
+#else
+[assembly: AssemblyVersion("4.0.0.0")]
+#endif
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/src/Services/ResourceExplorer2/AWSSDK.ResourceExplorer2.NetFramework.csproj b/sdk/src/Services/ResourceExplorer2/AWSSDK.ResourceExplorer2.NetFramework.csproj
index 86fceb8c3b20..821df352d79e 100644
--- a/sdk/src/Services/ResourceExplorer2/AWSSDK.ResourceExplorer2.NetFramework.csproj
+++ b/sdk/src/Services/ResourceExplorer2/AWSSDK.ResourceExplorer2.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);BCL;AWS_ASYNC_API;CODE_ANALYSIS</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(RuleSetFileForBuild)' == 'false' Or '$(RuleSetFileForBuild)' == '' ">
diff --git a/sdk/src/Services/ResourceExplorer2/AWSSDK.ResourceExplorer2.NetStandard.csproj b/sdk/src/Services/ResourceExplorer2/AWSSDK.ResourceExplorer2.NetStandard.csproj
index f6160193d7d9..cf65dfbf23c9 100644
--- a/sdk/src/Services/ResourceExplorer2/AWSSDK.ResourceExplorer2.NetStandard.csproj
+++ b/sdk/src/Services/ResourceExplorer2/AWSSDK.ResourceExplorer2.NetStandard.csproj
@@ -22,6 +22,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <!-- Async Enumerable Compatibility -->
diff --git a/sdk/src/Services/ResourceExplorer2/Generated/AmazonResourceExplorer2Config.cs b/sdk/src/Services/ResourceExplorer2/Generated/AmazonResourceExplorer2Config.cs
index 12e5ddda3ed8..967ef567d7bc 100644
--- a/sdk/src/Services/ResourceExplorer2/Generated/AmazonResourceExplorer2Config.cs
+++ b/sdk/src/Services/ResourceExplorer2/Generated/AmazonResourceExplorer2Config.cs
@@ -34,7 +34,7 @@ namespace Amazon.ResourceExplorer2
     public partial class AmazonResourceExplorer2Config : ClientConfig
     {
         private static readonly string UserAgentString =
-            InternalSDKUtils.BuildUserAgentString("Resource Explorer 2", "3.7.302.35");
+            InternalSDKUtils.BuildUserAgentString("Resource Explorer 2", "4.0.0.0");
 
         private static readonly AmazonResourceExplorer2EndpointResolver EndpointResolver =
             new AmazonResourceExplorer2EndpointResolver();
diff --git a/sdk/src/Services/ResourceExplorer2/Properties/AssemblyInfo.cs b/sdk/src/Services/ResourceExplorer2/Properties/AssemblyInfo.cs
index d99b8399c3d8..35a09f51fa2d 100644
--- a/sdk/src/Services/ResourceExplorer2/Properties/AssemblyInfo.cs
+++ b/sdk/src/Services/ResourceExplorer2/Properties/AssemblyInfo.cs
@@ -41,5 +41,9 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.302.35")]
\ No newline at end of file
+#if BCL
+[assembly: AssemblyVersion("4.0")]
+#else
+[assembly: AssemblyVersion("4.0.0.0")]
+#endif
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/src/Services/ResourceGroups/AWSSDK.ResourceGroups.NetFramework.csproj b/sdk/src/Services/ResourceGroups/AWSSDK.ResourceGroups.NetFramework.csproj
index a468bceafb69..04c11d12f285 100644
--- a/sdk/src/Services/ResourceGroups/AWSSDK.ResourceGroups.NetFramework.csproj
+++ b/sdk/src/Services/ResourceGroups/AWSSDK.ResourceGroups.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);BCL;AWS_ASYNC_API;CODE_ANALYSIS</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(RuleSetFileForBuild)' == 'false' Or '$(RuleSetFileForBuild)' == '' ">
diff --git a/sdk/src/Services/ResourceGroups/AWSSDK.ResourceGroups.NetStandard.csproj b/sdk/src/Services/ResourceGroups/AWSSDK.ResourceGroups.NetStandard.csproj
index 7845fde35bf0..4baa4d038d6a 100644
--- a/sdk/src/Services/ResourceGroups/AWSSDK.ResourceGroups.NetStandard.csproj
+++ b/sdk/src/Services/ResourceGroups/AWSSDK.ResourceGroups.NetStandard.csproj
@@ -22,6 +22,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <!-- Async Enumerable Compatibility -->
diff --git a/sdk/src/Services/ResourceGroups/Generated/AmazonResourceGroupsConfig.cs b/sdk/src/Services/ResourceGroups/Generated/AmazonResourceGroupsConfig.cs
index dd5e462d2410..5ed33926084b 100644
--- a/sdk/src/Services/ResourceGroups/Generated/AmazonResourceGroupsConfig.cs
+++ b/sdk/src/Services/ResourceGroups/Generated/AmazonResourceGroupsConfig.cs
@@ -34,7 +34,7 @@ namespace Amazon.ResourceGroups
     public partial class AmazonResourceGroupsConfig : ClientConfig
     {
         private static readonly string UserAgentString =
-            InternalSDKUtils.BuildUserAgentString("Resource Groups", "3.7.301.14");
+            InternalSDKUtils.BuildUserAgentString("Resource Groups", "4.0.0.0");
 
         private static readonly AmazonResourceGroupsEndpointResolver EndpointResolver =
             new AmazonResourceGroupsEndpointResolver();
diff --git a/sdk/src/Services/ResourceGroups/Properties/AssemblyInfo.cs b/sdk/src/Services/ResourceGroups/Properties/AssemblyInfo.cs
index 8f7e18bc7cf2..7c48988ee493 100644
--- a/sdk/src/Services/ResourceGroups/Properties/AssemblyInfo.cs
+++ b/sdk/src/Services/ResourceGroups/Properties/AssemblyInfo.cs
@@ -41,5 +41,9 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.301.14")]
\ No newline at end of file
+#if BCL
+[assembly: AssemblyVersion("4.0")]
+#else
+[assembly: AssemblyVersion("4.0.0.0")]
+#endif
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/src/Services/ResourceGroupsTaggingAPI/AWSSDK.ResourceGroupsTaggingAPI.NetFramework.csproj b/sdk/src/Services/ResourceGroupsTaggingAPI/AWSSDK.ResourceGroupsTaggingAPI.NetFramework.csproj
index 345ab7c62ec7..4f95e8d2729a 100644
--- a/sdk/src/Services/ResourceGroupsTaggingAPI/AWSSDK.ResourceGroupsTaggingAPI.NetFramework.csproj
+++ b/sdk/src/Services/ResourceGroupsTaggingAPI/AWSSDK.ResourceGroupsTaggingAPI.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);BCL;AWS_ASYNC_API;CODE_ANALYSIS</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(RuleSetFileForBuild)' == 'false' Or '$(RuleSetFileForBuild)' == '' ">
diff --git a/sdk/src/Services/ResourceGroupsTaggingAPI/AWSSDK.ResourceGroupsTaggingAPI.NetStandard.csproj b/sdk/src/Services/ResourceGroupsTaggingAPI/AWSSDK.ResourceGroupsTaggingAPI.NetStandard.csproj
index 52fe6e982f62..07a172abf914 100644
--- a/sdk/src/Services/ResourceGroupsTaggingAPI/AWSSDK.ResourceGroupsTaggingAPI.NetStandard.csproj
+++ b/sdk/src/Services/ResourceGroupsTaggingAPI/AWSSDK.ResourceGroupsTaggingAPI.NetStandard.csproj
@@ -22,6 +22,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <!-- Async Enumerable Compatibility -->
diff --git a/sdk/src/Services/ResourceGroupsTaggingAPI/Generated/AmazonResourceGroupsTaggingAPIConfig.cs b/sdk/src/Services/ResourceGroupsTaggingAPI/Generated/AmazonResourceGroupsTaggingAPIConfig.cs
index 442d01516e13..1efe2384bd55 100644
--- a/sdk/src/Services/ResourceGroupsTaggingAPI/Generated/AmazonResourceGroupsTaggingAPIConfig.cs
+++ b/sdk/src/Services/ResourceGroupsTaggingAPI/Generated/AmazonResourceGroupsTaggingAPIConfig.cs
@@ -34,7 +34,7 @@ namespace Amazon.ResourceGroupsTaggingAPI
     public partial class AmazonResourceGroupsTaggingAPIConfig : ClientConfig
     {
         private static readonly string UserAgentString =
-            InternalSDKUtils.BuildUserAgentString("Resource Groups Tagging API", "3.7.300.84");
+            InternalSDKUtils.BuildUserAgentString("Resource Groups Tagging API", "4.0.0.0");
 
         private static readonly AmazonResourceGroupsTaggingAPIEndpointResolver EndpointResolver =
             new AmazonResourceGroupsTaggingAPIEndpointResolver();
diff --git a/sdk/src/Services/ResourceGroupsTaggingAPI/Properties/AssemblyInfo.cs b/sdk/src/Services/ResourceGroupsTaggingAPI/Properties/AssemblyInfo.cs
index a9c920bc70f4..e6ed4acc58ab 100644
--- a/sdk/src/Services/ResourceGroupsTaggingAPI/Properties/AssemblyInfo.cs
+++ b/sdk/src/Services/ResourceGroupsTaggingAPI/Properties/AssemblyInfo.cs
@@ -41,5 +41,9 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.300.84")]
\ No newline at end of file
+#if BCL
+[assembly: AssemblyVersion("4.0")]
+#else
+[assembly: AssemblyVersion("4.0.0.0")]
+#endif
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/src/Services/RoboMaker/AWSSDK.RoboMaker.NetFramework.csproj b/sdk/src/Services/RoboMaker/AWSSDK.RoboMaker.NetFramework.csproj
index cb563437952c..dca1b9ca29a9 100644
--- a/sdk/src/Services/RoboMaker/AWSSDK.RoboMaker.NetFramework.csproj
+++ b/sdk/src/Services/RoboMaker/AWSSDK.RoboMaker.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);BCL;AWS_ASYNC_API;CODE_ANALYSIS</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(RuleSetFileForBuild)' == 'false' Or '$(RuleSetFileForBuild)' == '' ">
diff --git a/sdk/src/Services/RoboMaker/AWSSDK.RoboMaker.NetStandard.csproj b/sdk/src/Services/RoboMaker/AWSSDK.RoboMaker.NetStandard.csproj
index 03778f0790e8..0922bd4743fd 100644
--- a/sdk/src/Services/RoboMaker/AWSSDK.RoboMaker.NetStandard.csproj
+++ b/sdk/src/Services/RoboMaker/AWSSDK.RoboMaker.NetStandard.csproj
@@ -22,6 +22,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <!-- Async Enumerable Compatibility -->
diff --git a/sdk/src/Services/RoboMaker/Generated/AmazonRoboMakerConfig.cs b/sdk/src/Services/RoboMaker/Generated/AmazonRoboMakerConfig.cs
index 1a6392716bbf..30ebe5ecbc9a 100644
--- a/sdk/src/Services/RoboMaker/Generated/AmazonRoboMakerConfig.cs
+++ b/sdk/src/Services/RoboMaker/Generated/AmazonRoboMakerConfig.cs
@@ -34,7 +34,7 @@ namespace Amazon.RoboMaker
     public partial class AmazonRoboMakerConfig : ClientConfig
     {
         private static readonly string UserAgentString =
-            InternalSDKUtils.BuildUserAgentString("RoboMaker", "3.7.300.84");
+            InternalSDKUtils.BuildUserAgentString("RoboMaker", "4.0.0.0");
 
         private static readonly AmazonRoboMakerEndpointResolver EndpointResolver =
             new AmazonRoboMakerEndpointResolver();
diff --git a/sdk/src/Services/RoboMaker/Properties/AssemblyInfo.cs b/sdk/src/Services/RoboMaker/Properties/AssemblyInfo.cs
index c398fe8a6a91..8863ec580da4 100644
--- a/sdk/src/Services/RoboMaker/Properties/AssemblyInfo.cs
+++ b/sdk/src/Services/RoboMaker/Properties/AssemblyInfo.cs
@@ -41,5 +41,9 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.300.84")]
\ No newline at end of file
+#if BCL
+[assembly: AssemblyVersion("4.0")]
+#else
+[assembly: AssemblyVersion("4.0.0.0")]
+#endif
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/src/Services/Route53/AWSSDK.Route53.NetFramework.csproj b/sdk/src/Services/Route53/AWSSDK.Route53.NetFramework.csproj
index e041309c07bd..8a9d10651943 100644
--- a/sdk/src/Services/Route53/AWSSDK.Route53.NetFramework.csproj
+++ b/sdk/src/Services/Route53/AWSSDK.Route53.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);BCL;AWS_ASYNC_API;CODE_ANALYSIS</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(RuleSetFileForBuild)' == 'false' Or '$(RuleSetFileForBuild)' == '' ">
diff --git a/sdk/src/Services/Route53/AWSSDK.Route53.NetStandard.csproj b/sdk/src/Services/Route53/AWSSDK.Route53.NetStandard.csproj
index 355ceff7629f..f9f7d0bceed7 100644
--- a/sdk/src/Services/Route53/AWSSDK.Route53.NetStandard.csproj
+++ b/sdk/src/Services/Route53/AWSSDK.Route53.NetStandard.csproj
@@ -22,6 +22,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <!-- Async Enumerable Compatibility -->
diff --git a/sdk/src/Services/Route53/Generated/AmazonRoute53Config.cs b/sdk/src/Services/Route53/Generated/AmazonRoute53Config.cs
index b387c11bafec..579f398f7341 100644
--- a/sdk/src/Services/Route53/Generated/AmazonRoute53Config.cs
+++ b/sdk/src/Services/Route53/Generated/AmazonRoute53Config.cs
@@ -34,7 +34,7 @@ namespace Amazon.Route53
     public partial class AmazonRoute53Config : ClientConfig
     {
         private static readonly string UserAgentString =
-            InternalSDKUtils.BuildUserAgentString("Route 53", "3.7.302.51");
+            InternalSDKUtils.BuildUserAgentString("Route 53", "4.0.0.0");
 
         private static readonly AmazonRoute53EndpointResolver EndpointResolver =
             new AmazonRoute53EndpointResolver();
diff --git a/sdk/src/Services/Route53/Properties/AssemblyInfo.cs b/sdk/src/Services/Route53/Properties/AssemblyInfo.cs
index 6ea760ab6753..9bd94592cc19 100644
--- a/sdk/src/Services/Route53/Properties/AssemblyInfo.cs
+++ b/sdk/src/Services/Route53/Properties/AssemblyInfo.cs
@@ -41,5 +41,9 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.302.51")]
\ No newline at end of file
+#if BCL
+[assembly: AssemblyVersion("4.0")]
+#else
+[assembly: AssemblyVersion("4.0.0.0")]
+#endif
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/src/Services/Route53Domains/AWSSDK.Route53Domains.NetFramework.csproj b/sdk/src/Services/Route53Domains/AWSSDK.Route53Domains.NetFramework.csproj
index 2901d330e9d8..50d228a073e9 100644
--- a/sdk/src/Services/Route53Domains/AWSSDK.Route53Domains.NetFramework.csproj
+++ b/sdk/src/Services/Route53Domains/AWSSDK.Route53Domains.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);BCL;AWS_ASYNC_API;CODE_ANALYSIS</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(RuleSetFileForBuild)' == 'false' Or '$(RuleSetFileForBuild)' == '' ">
diff --git a/sdk/src/Services/Route53Domains/AWSSDK.Route53Domains.NetStandard.csproj b/sdk/src/Services/Route53Domains/AWSSDK.Route53Domains.NetStandard.csproj
index 08059c81c8b2..593858d7718f 100644
--- a/sdk/src/Services/Route53Domains/AWSSDK.Route53Domains.NetStandard.csproj
+++ b/sdk/src/Services/Route53Domains/AWSSDK.Route53Domains.NetStandard.csproj
@@ -22,6 +22,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <!-- Async Enumerable Compatibility -->
diff --git a/sdk/src/Services/Route53Domains/Generated/AmazonRoute53DomainsConfig.cs b/sdk/src/Services/Route53Domains/Generated/AmazonRoute53DomainsConfig.cs
index c0b17cb193ce..0b766ab606f0 100644
--- a/sdk/src/Services/Route53Domains/Generated/AmazonRoute53DomainsConfig.cs
+++ b/sdk/src/Services/Route53Domains/Generated/AmazonRoute53DomainsConfig.cs
@@ -34,7 +34,7 @@ namespace Amazon.Route53Domains
     public partial class AmazonRoute53DomainsConfig : ClientConfig
     {
         private static readonly string UserAgentString =
-            InternalSDKUtils.BuildUserAgentString("Route 53 Domains", "3.7.301.36");
+            InternalSDKUtils.BuildUserAgentString("Route 53 Domains", "4.0.0.0");
 
         private static readonly AmazonRoute53DomainsEndpointResolver EndpointResolver =
             new AmazonRoute53DomainsEndpointResolver();
diff --git a/sdk/src/Services/Route53Domains/Properties/AssemblyInfo.cs b/sdk/src/Services/Route53Domains/Properties/AssemblyInfo.cs
index 74e0f740f959..8b5f45176020 100644
--- a/sdk/src/Services/Route53Domains/Properties/AssemblyInfo.cs
+++ b/sdk/src/Services/Route53Domains/Properties/AssemblyInfo.cs
@@ -41,5 +41,9 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.301.36")]
\ No newline at end of file
+#if BCL
+[assembly: AssemblyVersion("4.0")]
+#else
+[assembly: AssemblyVersion("4.0.0.0")]
+#endif
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/src/Services/Route53Profiles/AWSSDK.Route53Profiles.NetFramework.csproj b/sdk/src/Services/Route53Profiles/AWSSDK.Route53Profiles.NetFramework.csproj
index 8180d5b1bcc2..aa63cc5b2183 100644
--- a/sdk/src/Services/Route53Profiles/AWSSDK.Route53Profiles.NetFramework.csproj
+++ b/sdk/src/Services/Route53Profiles/AWSSDK.Route53Profiles.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);BCL;AWS_ASYNC_API;CODE_ANALYSIS</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(RuleSetFileForBuild)' == 'false' Or '$(RuleSetFileForBuild)' == '' ">
diff --git a/sdk/src/Services/Route53Profiles/AWSSDK.Route53Profiles.NetStandard.csproj b/sdk/src/Services/Route53Profiles/AWSSDK.Route53Profiles.NetStandard.csproj
index 99682fabf128..b16ecea83499 100644
--- a/sdk/src/Services/Route53Profiles/AWSSDK.Route53Profiles.NetStandard.csproj
+++ b/sdk/src/Services/Route53Profiles/AWSSDK.Route53Profiles.NetStandard.csproj
@@ -22,6 +22,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <!-- Async Enumerable Compatibility -->
diff --git a/sdk/src/Services/Route53Profiles/Generated/AmazonRoute53ProfilesConfig.cs b/sdk/src/Services/Route53Profiles/Generated/AmazonRoute53ProfilesConfig.cs
index ed271b5a3487..bb4cdf92aade 100644
--- a/sdk/src/Services/Route53Profiles/Generated/AmazonRoute53ProfilesConfig.cs
+++ b/sdk/src/Services/Route53Profiles/Generated/AmazonRoute53ProfilesConfig.cs
@@ -34,7 +34,7 @@ namespace Amazon.Route53Profiles
     public partial class AmazonRoute53ProfilesConfig : ClientConfig
     {
         private static readonly string UserAgentString =
-            InternalSDKUtils.BuildUserAgentString("Route53Profiles", "3.7.300.5");
+            InternalSDKUtils.BuildUserAgentString("Route53Profiles", "4.0.0.0");
 
         private static readonly AmazonRoute53ProfilesEndpointResolver EndpointResolver =
             new AmazonRoute53ProfilesEndpointResolver();
diff --git a/sdk/src/Services/Route53Profiles/Properties/AssemblyInfo.cs b/sdk/src/Services/Route53Profiles/Properties/AssemblyInfo.cs
index 41e11cafe00c..28f62b718456 100644
--- a/sdk/src/Services/Route53Profiles/Properties/AssemblyInfo.cs
+++ b/sdk/src/Services/Route53Profiles/Properties/AssemblyInfo.cs
@@ -41,5 +41,9 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.300.5")]
\ No newline at end of file
+#if BCL
+[assembly: AssemblyVersion("4.0")]
+#else
+[assembly: AssemblyVersion("4.0.0.0")]
+#endif
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/src/Services/Route53RecoveryCluster/AWSSDK.Route53RecoveryCluster.NetFramework.csproj b/sdk/src/Services/Route53RecoveryCluster/AWSSDK.Route53RecoveryCluster.NetFramework.csproj
index de788f341245..939a1ee31477 100644
--- a/sdk/src/Services/Route53RecoveryCluster/AWSSDK.Route53RecoveryCluster.NetFramework.csproj
+++ b/sdk/src/Services/Route53RecoveryCluster/AWSSDK.Route53RecoveryCluster.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);BCL;AWS_ASYNC_API;CODE_ANALYSIS</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(RuleSetFileForBuild)' == 'false' Or '$(RuleSetFileForBuild)' == '' ">
diff --git a/sdk/src/Services/Route53RecoveryCluster/AWSSDK.Route53RecoveryCluster.NetStandard.csproj b/sdk/src/Services/Route53RecoveryCluster/AWSSDK.Route53RecoveryCluster.NetStandard.csproj
index 13e0e01f5276..ae374f29421f 100644
--- a/sdk/src/Services/Route53RecoveryCluster/AWSSDK.Route53RecoveryCluster.NetStandard.csproj
+++ b/sdk/src/Services/Route53RecoveryCluster/AWSSDK.Route53RecoveryCluster.NetStandard.csproj
@@ -22,6 +22,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <!-- Async Enumerable Compatibility -->
diff --git a/sdk/src/Services/Route53RecoveryCluster/Generated/AmazonRoute53RecoveryClusterConfig.cs b/sdk/src/Services/Route53RecoveryCluster/Generated/AmazonRoute53RecoveryClusterConfig.cs
index e9cb505f75b5..8dc2bef1827c 100644
--- a/sdk/src/Services/Route53RecoveryCluster/Generated/AmazonRoute53RecoveryClusterConfig.cs
+++ b/sdk/src/Services/Route53RecoveryCluster/Generated/AmazonRoute53RecoveryClusterConfig.cs
@@ -34,7 +34,7 @@ namespace Amazon.Route53RecoveryCluster
     public partial class AmazonRoute53RecoveryClusterConfig : ClientConfig
     {
         private static readonly string UserAgentString =
-            InternalSDKUtils.BuildUserAgentString("Route53 Recovery Cluster", "3.7.300.84");
+            InternalSDKUtils.BuildUserAgentString("Route53 Recovery Cluster", "4.0.0.0");
 
         private static readonly AmazonRoute53RecoveryClusterEndpointResolver EndpointResolver =
             new AmazonRoute53RecoveryClusterEndpointResolver();
diff --git a/sdk/src/Services/Route53RecoveryCluster/Properties/AssemblyInfo.cs b/sdk/src/Services/Route53RecoveryCluster/Properties/AssemblyInfo.cs
index ad763b08b400..d33bf58774ae 100644
--- a/sdk/src/Services/Route53RecoveryCluster/Properties/AssemblyInfo.cs
+++ b/sdk/src/Services/Route53RecoveryCluster/Properties/AssemblyInfo.cs
@@ -41,5 +41,9 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.300.84")]
\ No newline at end of file
+#if BCL
+[assembly: AssemblyVersion("4.0")]
+#else
+[assembly: AssemblyVersion("4.0.0.0")]
+#endif
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/src/Services/Route53RecoveryControlConfig/AWSSDK.Route53RecoveryControlConfig.NetFramework.csproj b/sdk/src/Services/Route53RecoveryControlConfig/AWSSDK.Route53RecoveryControlConfig.NetFramework.csproj
index 0fb5612f284a..26fca6f8ff39 100644
--- a/sdk/src/Services/Route53RecoveryControlConfig/AWSSDK.Route53RecoveryControlConfig.NetFramework.csproj
+++ b/sdk/src/Services/Route53RecoveryControlConfig/AWSSDK.Route53RecoveryControlConfig.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);BCL;AWS_ASYNC_API;CODE_ANALYSIS</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(RuleSetFileForBuild)' == 'false' Or '$(RuleSetFileForBuild)' == '' ">
diff --git a/sdk/src/Services/Route53RecoveryControlConfig/AWSSDK.Route53RecoveryControlConfig.NetStandard.csproj b/sdk/src/Services/Route53RecoveryControlConfig/AWSSDK.Route53RecoveryControlConfig.NetStandard.csproj
index 97f70e3c960b..35ebc3be3bd2 100644
--- a/sdk/src/Services/Route53RecoveryControlConfig/AWSSDK.Route53RecoveryControlConfig.NetStandard.csproj
+++ b/sdk/src/Services/Route53RecoveryControlConfig/AWSSDK.Route53RecoveryControlConfig.NetStandard.csproj
@@ -22,6 +22,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <!-- Async Enumerable Compatibility -->
diff --git a/sdk/src/Services/Route53RecoveryControlConfig/Generated/AmazonRoute53RecoveryControlConfigConfig.cs b/sdk/src/Services/Route53RecoveryControlConfig/Generated/AmazonRoute53RecoveryControlConfigConfig.cs
index c5b30f7cb1f0..88f93b4b4c9c 100644
--- a/sdk/src/Services/Route53RecoveryControlConfig/Generated/AmazonRoute53RecoveryControlConfigConfig.cs
+++ b/sdk/src/Services/Route53RecoveryControlConfig/Generated/AmazonRoute53RecoveryControlConfigConfig.cs
@@ -34,7 +34,7 @@ namespace Amazon.Route53RecoveryControlConfig
     public partial class AmazonRoute53RecoveryControlConfigConfig : ClientConfig
     {
         private static readonly string UserAgentString =
-            InternalSDKUtils.BuildUserAgentString("Route53 Recovery Control Config", "3.7.300.84");
+            InternalSDKUtils.BuildUserAgentString("Route53 Recovery Control Config", "4.0.0.0");
 
         private static readonly AmazonRoute53RecoveryControlConfigEndpointResolver EndpointResolver =
             new AmazonRoute53RecoveryControlConfigEndpointResolver();
diff --git a/sdk/src/Services/Route53RecoveryControlConfig/Properties/AssemblyInfo.cs b/sdk/src/Services/Route53RecoveryControlConfig/Properties/AssemblyInfo.cs
index 6a79734f0a15..0d313410a25d 100644
--- a/sdk/src/Services/Route53RecoveryControlConfig/Properties/AssemblyInfo.cs
+++ b/sdk/src/Services/Route53RecoveryControlConfig/Properties/AssemblyInfo.cs
@@ -41,5 +41,9 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.300.84")]
\ No newline at end of file
+#if BCL
+[assembly: AssemblyVersion("4.0")]
+#else
+[assembly: AssemblyVersion("4.0.0.0")]
+#endif
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/src/Services/Route53RecoveryReadiness/AWSSDK.Route53RecoveryReadiness.NetFramework.csproj b/sdk/src/Services/Route53RecoveryReadiness/AWSSDK.Route53RecoveryReadiness.NetFramework.csproj
index a306d5f4a49a..4b672bcc8b12 100644
--- a/sdk/src/Services/Route53RecoveryReadiness/AWSSDK.Route53RecoveryReadiness.NetFramework.csproj
+++ b/sdk/src/Services/Route53RecoveryReadiness/AWSSDK.Route53RecoveryReadiness.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);BCL;AWS_ASYNC_API;CODE_ANALYSIS</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(RuleSetFileForBuild)' == 'false' Or '$(RuleSetFileForBuild)' == '' ">
diff --git a/sdk/src/Services/Route53RecoveryReadiness/AWSSDK.Route53RecoveryReadiness.NetStandard.csproj b/sdk/src/Services/Route53RecoveryReadiness/AWSSDK.Route53RecoveryReadiness.NetStandard.csproj
index 6340149210e2..806f823787a4 100644
--- a/sdk/src/Services/Route53RecoveryReadiness/AWSSDK.Route53RecoveryReadiness.NetStandard.csproj
+++ b/sdk/src/Services/Route53RecoveryReadiness/AWSSDK.Route53RecoveryReadiness.NetStandard.csproj
@@ -22,6 +22,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <!-- Async Enumerable Compatibility -->
diff --git a/sdk/src/Services/Route53RecoveryReadiness/Generated/AmazonRoute53RecoveryReadinessConfig.cs b/sdk/src/Services/Route53RecoveryReadiness/Generated/AmazonRoute53RecoveryReadinessConfig.cs
index 1fadcb1cb28a..b722ccf31f8b 100644
--- a/sdk/src/Services/Route53RecoveryReadiness/Generated/AmazonRoute53RecoveryReadinessConfig.cs
+++ b/sdk/src/Services/Route53RecoveryReadiness/Generated/AmazonRoute53RecoveryReadinessConfig.cs
@@ -34,7 +34,7 @@ namespace Amazon.Route53RecoveryReadiness
     public partial class AmazonRoute53RecoveryReadinessConfig : ClientConfig
     {
         private static readonly string UserAgentString =
-            InternalSDKUtils.BuildUserAgentString("Route53 Recovery Readiness", "3.7.300.84");
+            InternalSDKUtils.BuildUserAgentString("Route53 Recovery Readiness", "4.0.0.0");
 
         private static readonly AmazonRoute53RecoveryReadinessEndpointResolver EndpointResolver =
             new AmazonRoute53RecoveryReadinessEndpointResolver();
diff --git a/sdk/src/Services/Route53RecoveryReadiness/Properties/AssemblyInfo.cs b/sdk/src/Services/Route53RecoveryReadiness/Properties/AssemblyInfo.cs
index 94af565a1c68..5e8f75069421 100644
--- a/sdk/src/Services/Route53RecoveryReadiness/Properties/AssemblyInfo.cs
+++ b/sdk/src/Services/Route53RecoveryReadiness/Properties/AssemblyInfo.cs
@@ -41,5 +41,9 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.300.84")]
\ No newline at end of file
+#if BCL
+[assembly: AssemblyVersion("4.0")]
+#else
+[assembly: AssemblyVersion("4.0.0.0")]
+#endif
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/src/Services/Route53Resolver/AWSSDK.Route53Resolver.NetFramework.csproj b/sdk/src/Services/Route53Resolver/AWSSDK.Route53Resolver.NetFramework.csproj
index ff8c18bb3434..fcfd85a141fb 100644
--- a/sdk/src/Services/Route53Resolver/AWSSDK.Route53Resolver.NetFramework.csproj
+++ b/sdk/src/Services/Route53Resolver/AWSSDK.Route53Resolver.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);BCL;AWS_ASYNC_API;CODE_ANALYSIS</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(RuleSetFileForBuild)' == 'false' Or '$(RuleSetFileForBuild)' == '' ">
diff --git a/sdk/src/Services/Route53Resolver/AWSSDK.Route53Resolver.NetStandard.csproj b/sdk/src/Services/Route53Resolver/AWSSDK.Route53Resolver.NetStandard.csproj
index f79fbe66de44..cfb684096c42 100644
--- a/sdk/src/Services/Route53Resolver/AWSSDK.Route53Resolver.NetStandard.csproj
+++ b/sdk/src/Services/Route53Resolver/AWSSDK.Route53Resolver.NetStandard.csproj
@@ -22,6 +22,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <!-- Async Enumerable Compatibility -->
diff --git a/sdk/src/Services/Route53Resolver/Generated/AmazonRoute53ResolverConfig.cs b/sdk/src/Services/Route53Resolver/Generated/AmazonRoute53ResolverConfig.cs
index 643af3fdee9c..5fe88d73e19f 100644
--- a/sdk/src/Services/Route53Resolver/Generated/AmazonRoute53ResolverConfig.cs
+++ b/sdk/src/Services/Route53Resolver/Generated/AmazonRoute53ResolverConfig.cs
@@ -34,7 +34,7 @@ namespace Amazon.Route53Resolver
     public partial class AmazonRoute53ResolverConfig : ClientConfig
     {
         private static readonly string UserAgentString =
-            InternalSDKUtils.BuildUserAgentString("Route53Resolver", "3.7.303.0");
+            InternalSDKUtils.BuildUserAgentString("Route53Resolver", "4.0.0.0");
 
         private static readonly AmazonRoute53ResolverEndpointResolver EndpointResolver =
             new AmazonRoute53ResolverEndpointResolver();
diff --git a/sdk/src/Services/Route53Resolver/Properties/AssemblyInfo.cs b/sdk/src/Services/Route53Resolver/Properties/AssemblyInfo.cs
index 23d73a5d072a..88fdc1d23c32 100644
--- a/sdk/src/Services/Route53Resolver/Properties/AssemblyInfo.cs
+++ b/sdk/src/Services/Route53Resolver/Properties/AssemblyInfo.cs
@@ -41,5 +41,9 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.303.0")]
\ No newline at end of file
+#if BCL
+[assembly: AssemblyVersion("4.0")]
+#else
+[assembly: AssemblyVersion("4.0.0.0")]
+#endif
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/src/Services/S3/AWSSDK.S3.NetFramework.csproj b/sdk/src/Services/S3/AWSSDK.S3.NetFramework.csproj
index 438272f8a127..c703a97a20d7 100644
--- a/sdk/src/Services/S3/AWSSDK.S3.NetFramework.csproj
+++ b/sdk/src/Services/S3/AWSSDK.S3.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);BCL;AWS_ASYNC_API;CODE_ANALYSIS</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(RuleSetFileForBuild)' == 'false' Or '$(RuleSetFileForBuild)' == '' ">
diff --git a/sdk/src/Services/S3/AWSSDK.S3.NetStandard.csproj b/sdk/src/Services/S3/AWSSDK.S3.NetStandard.csproj
index ab0934b52723..0214b9764f66 100644
--- a/sdk/src/Services/S3/AWSSDK.S3.NetStandard.csproj
+++ b/sdk/src/Services/S3/AWSSDK.S3.NetStandard.csproj
@@ -22,6 +22,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <!-- Async Enumerable Compatibility -->
diff --git a/sdk/src/Services/S3/Generated/AmazonS3Config.cs b/sdk/src/Services/S3/Generated/AmazonS3Config.cs
index 4105a2b67dbf..c82bd20871f7 100644
--- a/sdk/src/Services/S3/Generated/AmazonS3Config.cs
+++ b/sdk/src/Services/S3/Generated/AmazonS3Config.cs
@@ -34,7 +34,7 @@ namespace Amazon.S3
     public partial class AmazonS3Config : ClientConfig
     {
         private static readonly string UserAgentString =
-            InternalSDKUtils.BuildUserAgentString("S3", "3.7.307.25");
+            InternalSDKUtils.BuildUserAgentString("S3", "4.0.0.0");
 
         private static readonly AmazonS3EndpointResolver EndpointResolver =
             new AmazonS3EndpointResolver();
diff --git a/sdk/src/Services/S3/Properties/AssemblyInfo.cs b/sdk/src/Services/S3/Properties/AssemblyInfo.cs
index d9a3713bcb81..5ebe145e8930 100644
--- a/sdk/src/Services/S3/Properties/AssemblyInfo.cs
+++ b/sdk/src/Services/S3/Properties/AssemblyInfo.cs
@@ -41,5 +41,9 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.307.25")]
\ No newline at end of file
+#if BCL
+[assembly: AssemblyVersion("4.0")]
+#else
+[assembly: AssemblyVersion("4.0.0.0")]
+#endif
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/src/Services/S3Control/AWSSDK.S3Control.NetFramework.csproj b/sdk/src/Services/S3Control/AWSSDK.S3Control.NetFramework.csproj
index d2c88d4fdda8..699857a73256 100644
--- a/sdk/src/Services/S3Control/AWSSDK.S3Control.NetFramework.csproj
+++ b/sdk/src/Services/S3Control/AWSSDK.S3Control.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);BCL;AWS_ASYNC_API;CODE_ANALYSIS</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(RuleSetFileForBuild)' == 'false' Or '$(RuleSetFileForBuild)' == '' ">
diff --git a/sdk/src/Services/S3Control/AWSSDK.S3Control.NetStandard.csproj b/sdk/src/Services/S3Control/AWSSDK.S3Control.NetStandard.csproj
index 27d1cdd2af02..847372248db1 100644
--- a/sdk/src/Services/S3Control/AWSSDK.S3Control.NetStandard.csproj
+++ b/sdk/src/Services/S3Control/AWSSDK.S3Control.NetStandard.csproj
@@ -22,6 +22,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <!-- Async Enumerable Compatibility -->
diff --git a/sdk/src/Services/S3Control/Generated/AmazonS3ControlConfig.cs b/sdk/src/Services/S3Control/Generated/AmazonS3ControlConfig.cs
index dff387694474..59d349ce2819 100644
--- a/sdk/src/Services/S3Control/Generated/AmazonS3ControlConfig.cs
+++ b/sdk/src/Services/S3Control/Generated/AmazonS3ControlConfig.cs
@@ -34,7 +34,7 @@ namespace Amazon.S3Control
     public partial class AmazonS3ControlConfig : ClientConfig
     {
         private static readonly string UserAgentString =
-            InternalSDKUtils.BuildUserAgentString("S3 Control", "3.7.305.49");
+            InternalSDKUtils.BuildUserAgentString("S3 Control", "4.0.0.0");
 
         private static readonly AmazonS3ControlEndpointResolver EndpointResolver =
             new AmazonS3ControlEndpointResolver();
diff --git a/sdk/src/Services/S3Control/Properties/AssemblyInfo.cs b/sdk/src/Services/S3Control/Properties/AssemblyInfo.cs
index 5a91ef6b7ddd..e195b0e81426 100644
--- a/sdk/src/Services/S3Control/Properties/AssemblyInfo.cs
+++ b/sdk/src/Services/S3Control/Properties/AssemblyInfo.cs
@@ -41,5 +41,9 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.305.49")]
\ No newline at end of file
+#if BCL
+[assembly: AssemblyVersion("4.0")]
+#else
+[assembly: AssemblyVersion("4.0.0.0")]
+#endif
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/src/Services/S3Outposts/AWSSDK.S3Outposts.NetFramework.csproj b/sdk/src/Services/S3Outposts/AWSSDK.S3Outposts.NetFramework.csproj
index 48e4a37305b3..4d064cc5ef69 100644
--- a/sdk/src/Services/S3Outposts/AWSSDK.S3Outposts.NetFramework.csproj
+++ b/sdk/src/Services/S3Outposts/AWSSDK.S3Outposts.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);BCL;AWS_ASYNC_API;CODE_ANALYSIS</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(RuleSetFileForBuild)' == 'false' Or '$(RuleSetFileForBuild)' == '' ">
diff --git a/sdk/src/Services/S3Outposts/AWSSDK.S3Outposts.NetStandard.csproj b/sdk/src/Services/S3Outposts/AWSSDK.S3Outposts.NetStandard.csproj
index bfe491a2551c..c1ac1539158e 100644
--- a/sdk/src/Services/S3Outposts/AWSSDK.S3Outposts.NetStandard.csproj
+++ b/sdk/src/Services/S3Outposts/AWSSDK.S3Outposts.NetStandard.csproj
@@ -22,6 +22,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <!-- Async Enumerable Compatibility -->
diff --git a/sdk/src/Services/S3Outposts/Generated/AmazonS3OutpostsConfig.cs b/sdk/src/Services/S3Outposts/Generated/AmazonS3OutpostsConfig.cs
index d04b2f17ef58..c587ad776734 100644
--- a/sdk/src/Services/S3Outposts/Generated/AmazonS3OutpostsConfig.cs
+++ b/sdk/src/Services/S3Outposts/Generated/AmazonS3OutpostsConfig.cs
@@ -34,7 +34,7 @@ namespace Amazon.S3Outposts
     public partial class AmazonS3OutpostsConfig : ClientConfig
     {
         private static readonly string UserAgentString =
-            InternalSDKUtils.BuildUserAgentString("S3Outposts", "3.7.300.84");
+            InternalSDKUtils.BuildUserAgentString("S3Outposts", "4.0.0.0");
 
         private static readonly AmazonS3OutpostsEndpointResolver EndpointResolver =
             new AmazonS3OutpostsEndpointResolver();
diff --git a/sdk/src/Services/S3Outposts/Properties/AssemblyInfo.cs b/sdk/src/Services/S3Outposts/Properties/AssemblyInfo.cs
index a6a2cad16c38..8ca3bc292432 100644
--- a/sdk/src/Services/S3Outposts/Properties/AssemblyInfo.cs
+++ b/sdk/src/Services/S3Outposts/Properties/AssemblyInfo.cs
@@ -41,5 +41,9 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.300.84")]
\ No newline at end of file
+#if BCL
+[assembly: AssemblyVersion("4.0")]
+#else
+[assembly: AssemblyVersion("4.0.0.0")]
+#endif
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/src/Services/SQS/AWSSDK.SQS.NetFramework.csproj b/sdk/src/Services/SQS/AWSSDK.SQS.NetFramework.csproj
index d416bd643c63..cbbb92b18515 100644
--- a/sdk/src/Services/SQS/AWSSDK.SQS.NetFramework.csproj
+++ b/sdk/src/Services/SQS/AWSSDK.SQS.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);BCL;AWS_ASYNC_API;CODE_ANALYSIS</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(RuleSetFileForBuild)' == 'false' Or '$(RuleSetFileForBuild)' == '' ">
diff --git a/sdk/src/Services/SQS/AWSSDK.SQS.NetStandard.csproj b/sdk/src/Services/SQS/AWSSDK.SQS.NetStandard.csproj
index 41264c086007..a0b574904e28 100644
--- a/sdk/src/Services/SQS/AWSSDK.SQS.NetStandard.csproj
+++ b/sdk/src/Services/SQS/AWSSDK.SQS.NetStandard.csproj
@@ -22,6 +22,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <!-- Async Enumerable Compatibility -->
diff --git a/sdk/src/Services/SQS/Generated/AmazonSQSConfig.cs b/sdk/src/Services/SQS/Generated/AmazonSQSConfig.cs
index c4155b632700..849b0ea8e7d1 100644
--- a/sdk/src/Services/SQS/Generated/AmazonSQSConfig.cs
+++ b/sdk/src/Services/SQS/Generated/AmazonSQSConfig.cs
@@ -34,7 +34,7 @@ namespace Amazon.SQS
     public partial class AmazonSQSConfig : ClientConfig
     {
         private static readonly string UserAgentString =
-            InternalSDKUtils.BuildUserAgentString("SQS", "3.7.300.84");
+            InternalSDKUtils.BuildUserAgentString("SQS", "4.0.0.0");
 
         private static readonly AmazonSQSEndpointResolver EndpointResolver =
             new AmazonSQSEndpointResolver();
diff --git a/sdk/src/Services/SQS/Properties/AssemblyInfo.cs b/sdk/src/Services/SQS/Properties/AssemblyInfo.cs
index 8937bb820df1..fcfb6e545493 100644
--- a/sdk/src/Services/SQS/Properties/AssemblyInfo.cs
+++ b/sdk/src/Services/SQS/Properties/AssemblyInfo.cs
@@ -41,5 +41,9 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.300.84")]
\ No newline at end of file
+#if BCL
+[assembly: AssemblyVersion("4.0")]
+#else
+[assembly: AssemblyVersion("4.0.0.0")]
+#endif
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/src/Services/SSMContacts/AWSSDK.SSMContacts.NetFramework.csproj b/sdk/src/Services/SSMContacts/AWSSDK.SSMContacts.NetFramework.csproj
index 90506fb41df8..1e9ee6c9be25 100644
--- a/sdk/src/Services/SSMContacts/AWSSDK.SSMContacts.NetFramework.csproj
+++ b/sdk/src/Services/SSMContacts/AWSSDK.SSMContacts.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);BCL;AWS_ASYNC_API;CODE_ANALYSIS</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(RuleSetFileForBuild)' == 'false' Or '$(RuleSetFileForBuild)' == '' ">
diff --git a/sdk/src/Services/SSMContacts/AWSSDK.SSMContacts.NetStandard.csproj b/sdk/src/Services/SSMContacts/AWSSDK.SSMContacts.NetStandard.csproj
index 0f1cad518aa6..dd0549f378e3 100644
--- a/sdk/src/Services/SSMContacts/AWSSDK.SSMContacts.NetStandard.csproj
+++ b/sdk/src/Services/SSMContacts/AWSSDK.SSMContacts.NetStandard.csproj
@@ -22,6 +22,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <!-- Async Enumerable Compatibility -->
diff --git a/sdk/src/Services/SSMContacts/Generated/AmazonSSMContactsConfig.cs b/sdk/src/Services/SSMContacts/Generated/AmazonSSMContactsConfig.cs
index 93fdd083db80..002d43d0f29c 100644
--- a/sdk/src/Services/SSMContacts/Generated/AmazonSSMContactsConfig.cs
+++ b/sdk/src/Services/SSMContacts/Generated/AmazonSSMContactsConfig.cs
@@ -34,7 +34,7 @@ namespace Amazon.SSMContacts
     public partial class AmazonSSMContactsConfig : ClientConfig
     {
         private static readonly string UserAgentString =
-            InternalSDKUtils.BuildUserAgentString("SSM Contacts", "3.7.300.84");
+            InternalSDKUtils.BuildUserAgentString("SSM Contacts", "4.0.0.0");
 
         private static readonly AmazonSSMContactsEndpointResolver EndpointResolver =
             new AmazonSSMContactsEndpointResolver();
diff --git a/sdk/src/Services/SSMContacts/Properties/AssemblyInfo.cs b/sdk/src/Services/SSMContacts/Properties/AssemblyInfo.cs
index 6ac3cb9eeff3..f36c7c11265b 100644
--- a/sdk/src/Services/SSMContacts/Properties/AssemblyInfo.cs
+++ b/sdk/src/Services/SSMContacts/Properties/AssemblyInfo.cs
@@ -41,5 +41,9 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.300.84")]
\ No newline at end of file
+#if BCL
+[assembly: AssemblyVersion("4.0")]
+#else
+[assembly: AssemblyVersion("4.0.0.0")]
+#endif
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/src/Services/SSMIncidents/AWSSDK.SSMIncidents.NetFramework.csproj b/sdk/src/Services/SSMIncidents/AWSSDK.SSMIncidents.NetFramework.csproj
index 7be293c0f139..23d6fdc83915 100644
--- a/sdk/src/Services/SSMIncidents/AWSSDK.SSMIncidents.NetFramework.csproj
+++ b/sdk/src/Services/SSMIncidents/AWSSDK.SSMIncidents.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);BCL;AWS_ASYNC_API;CODE_ANALYSIS</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(RuleSetFileForBuild)' == 'false' Or '$(RuleSetFileForBuild)' == '' ">
diff --git a/sdk/src/Services/SSMIncidents/AWSSDK.SSMIncidents.NetStandard.csproj b/sdk/src/Services/SSMIncidents/AWSSDK.SSMIncidents.NetStandard.csproj
index dd21bb27eeab..5ac842c5a268 100644
--- a/sdk/src/Services/SSMIncidents/AWSSDK.SSMIncidents.NetStandard.csproj
+++ b/sdk/src/Services/SSMIncidents/AWSSDK.SSMIncidents.NetStandard.csproj
@@ -22,6 +22,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <!-- Async Enumerable Compatibility -->
diff --git a/sdk/src/Services/SSMIncidents/Generated/AmazonSSMIncidentsConfig.cs b/sdk/src/Services/SSMIncidents/Generated/AmazonSSMIncidentsConfig.cs
index ee42ee6fd121..e81df57db16c 100644
--- a/sdk/src/Services/SSMIncidents/Generated/AmazonSSMIncidentsConfig.cs
+++ b/sdk/src/Services/SSMIncidents/Generated/AmazonSSMIncidentsConfig.cs
@@ -34,7 +34,7 @@ namespace Amazon.SSMIncidents
     public partial class AmazonSSMIncidentsConfig : ClientConfig
     {
         private static readonly string UserAgentString =
-            InternalSDKUtils.BuildUserAgentString("SSM Incidents", "3.7.301.80");
+            InternalSDKUtils.BuildUserAgentString("SSM Incidents", "4.0.0.0");
 
         private static readonly AmazonSSMIncidentsEndpointResolver EndpointResolver =
             new AmazonSSMIncidentsEndpointResolver();
diff --git a/sdk/src/Services/SSMIncidents/Properties/AssemblyInfo.cs b/sdk/src/Services/SSMIncidents/Properties/AssemblyInfo.cs
index 2cdc746c144a..5888f284217d 100644
--- a/sdk/src/Services/SSMIncidents/Properties/AssemblyInfo.cs
+++ b/sdk/src/Services/SSMIncidents/Properties/AssemblyInfo.cs
@@ -41,5 +41,9 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.301.80")]
\ No newline at end of file
+#if BCL
+[assembly: AssemblyVersion("4.0")]
+#else
+[assembly: AssemblyVersion("4.0.0.0")]
+#endif
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/src/Services/SSO/AWSSDK.SSO.NetFramework.csproj b/sdk/src/Services/SSO/AWSSDK.SSO.NetFramework.csproj
index a292dabf7c48..78a7fe792790 100644
--- a/sdk/src/Services/SSO/AWSSDK.SSO.NetFramework.csproj
+++ b/sdk/src/Services/SSO/AWSSDK.SSO.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);BCL;AWS_ASYNC_API;CODE_ANALYSIS</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(RuleSetFileForBuild)' == 'false' Or '$(RuleSetFileForBuild)' == '' ">
diff --git a/sdk/src/Services/SSO/AWSSDK.SSO.NetStandard.csproj b/sdk/src/Services/SSO/AWSSDK.SSO.NetStandard.csproj
index 3c0029ddba50..73d133e62665 100644
--- a/sdk/src/Services/SSO/AWSSDK.SSO.NetStandard.csproj
+++ b/sdk/src/Services/SSO/AWSSDK.SSO.NetStandard.csproj
@@ -22,6 +22,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <!-- Async Enumerable Compatibility -->
diff --git a/sdk/src/Services/SSO/Generated/AmazonSSOConfig.cs b/sdk/src/Services/SSO/Generated/AmazonSSOConfig.cs
index 84d62116775f..1ea69a084b96 100644
--- a/sdk/src/Services/SSO/Generated/AmazonSSOConfig.cs
+++ b/sdk/src/Services/SSO/Generated/AmazonSSOConfig.cs
@@ -34,7 +34,7 @@ namespace Amazon.SSO
     public partial class AmazonSSOConfig : ClientConfig
     {
         private static readonly string UserAgentString =
-            InternalSDKUtils.BuildUserAgentString("SSO", "3.7.300.84");
+            InternalSDKUtils.BuildUserAgentString("SSO", "4.0.0.0");
 
         private static readonly AmazonSSOEndpointResolver EndpointResolver =
             new AmazonSSOEndpointResolver();
diff --git a/sdk/src/Services/SSO/Properties/AssemblyInfo.cs b/sdk/src/Services/SSO/Properties/AssemblyInfo.cs
index b726c8ede460..717620919cc0 100644
--- a/sdk/src/Services/SSO/Properties/AssemblyInfo.cs
+++ b/sdk/src/Services/SSO/Properties/AssemblyInfo.cs
@@ -41,5 +41,9 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.300.84")]
\ No newline at end of file
+#if BCL
+[assembly: AssemblyVersion("4.0")]
+#else
+[assembly: AssemblyVersion("4.0.0.0")]
+#endif
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/src/Services/SSOAdmin/AWSSDK.SSOAdmin.NetFramework.csproj b/sdk/src/Services/SSOAdmin/AWSSDK.SSOAdmin.NetFramework.csproj
index db4d5d57c39a..e20cd030c311 100644
--- a/sdk/src/Services/SSOAdmin/AWSSDK.SSOAdmin.NetFramework.csproj
+++ b/sdk/src/Services/SSOAdmin/AWSSDK.SSOAdmin.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);BCL;AWS_ASYNC_API;CODE_ANALYSIS</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(RuleSetFileForBuild)' == 'false' Or '$(RuleSetFileForBuild)' == '' ">
diff --git a/sdk/src/Services/SSOAdmin/AWSSDK.SSOAdmin.NetStandard.csproj b/sdk/src/Services/SSOAdmin/AWSSDK.SSOAdmin.NetStandard.csproj
index 50061a67d795..ecabb9b4aac5 100644
--- a/sdk/src/Services/SSOAdmin/AWSSDK.SSOAdmin.NetStandard.csproj
+++ b/sdk/src/Services/SSOAdmin/AWSSDK.SSOAdmin.NetStandard.csproj
@@ -22,6 +22,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <!-- Async Enumerable Compatibility -->
diff --git a/sdk/src/Services/SSOAdmin/Generated/AmazonSSOAdminConfig.cs b/sdk/src/Services/SSOAdmin/Generated/AmazonSSOAdminConfig.cs
index 557b83c37b02..5a234d8adb7f 100644
--- a/sdk/src/Services/SSOAdmin/Generated/AmazonSSOAdminConfig.cs
+++ b/sdk/src/Services/SSOAdmin/Generated/AmazonSSOAdminConfig.cs
@@ -34,7 +34,7 @@ namespace Amazon.SSOAdmin
     public partial class AmazonSSOAdminConfig : ClientConfig
     {
         private static readonly string UserAgentString =
-            InternalSDKUtils.BuildUserAgentString("SSO Admin", "3.7.302.79");
+            InternalSDKUtils.BuildUserAgentString("SSO Admin", "4.0.0.0");
 
         private static readonly AmazonSSOAdminEndpointResolver EndpointResolver =
             new AmazonSSOAdminEndpointResolver();
diff --git a/sdk/src/Services/SSOAdmin/Properties/AssemblyInfo.cs b/sdk/src/Services/SSOAdmin/Properties/AssemblyInfo.cs
index f89d4224b47b..6fa4327be998 100644
--- a/sdk/src/Services/SSOAdmin/Properties/AssemblyInfo.cs
+++ b/sdk/src/Services/SSOAdmin/Properties/AssemblyInfo.cs
@@ -41,5 +41,9 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.302.79")]
\ No newline at end of file
+#if BCL
+[assembly: AssemblyVersion("4.0")]
+#else
+[assembly: AssemblyVersion("4.0.0.0")]
+#endif
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/src/Services/SSOOIDC/AWSSDK.SSOOIDC.NetFramework.csproj b/sdk/src/Services/SSOOIDC/AWSSDK.SSOOIDC.NetFramework.csproj
index 6dae439c2026..169781ae605c 100644
--- a/sdk/src/Services/SSOOIDC/AWSSDK.SSOOIDC.NetFramework.csproj
+++ b/sdk/src/Services/SSOOIDC/AWSSDK.SSOOIDC.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);BCL;AWS_ASYNC_API;CODE_ANALYSIS</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(RuleSetFileForBuild)' == 'false' Or '$(RuleSetFileForBuild)' == '' ">
diff --git a/sdk/src/Services/SSOOIDC/AWSSDK.SSOOIDC.NetStandard.csproj b/sdk/src/Services/SSOOIDC/AWSSDK.SSOOIDC.NetStandard.csproj
index b4d5d35d5aff..86ae22f7ec74 100644
--- a/sdk/src/Services/SSOOIDC/AWSSDK.SSOOIDC.NetStandard.csproj
+++ b/sdk/src/Services/SSOOIDC/AWSSDK.SSOOIDC.NetStandard.csproj
@@ -22,6 +22,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <!-- Async Enumerable Compatibility -->
diff --git a/sdk/src/Services/SSOOIDC/Generated/AmazonSSOOIDCConfig.cs b/sdk/src/Services/SSOOIDC/Generated/AmazonSSOOIDCConfig.cs
index 606e3e175bed..d7c0812a5e12 100644
--- a/sdk/src/Services/SSOOIDC/Generated/AmazonSSOOIDCConfig.cs
+++ b/sdk/src/Services/SSOOIDC/Generated/AmazonSSOOIDCConfig.cs
@@ -34,7 +34,7 @@ namespace Amazon.SSOOIDC
     public partial class AmazonSSOOIDCConfig : ClientConfig
     {
         private static readonly string UserAgentString =
-            InternalSDKUtils.BuildUserAgentString("SSO OIDC", "3.7.301.79");
+            InternalSDKUtils.BuildUserAgentString("SSO OIDC", "4.0.0.0");
 
         private static readonly AmazonSSOOIDCEndpointResolver EndpointResolver =
             new AmazonSSOOIDCEndpointResolver();
diff --git a/sdk/src/Services/SSOOIDC/Properties/AssemblyInfo.cs b/sdk/src/Services/SSOOIDC/Properties/AssemblyInfo.cs
index 7864cd0ea79b..311b2574e845 100644
--- a/sdk/src/Services/SSOOIDC/Properties/AssemblyInfo.cs
+++ b/sdk/src/Services/SSOOIDC/Properties/AssemblyInfo.cs
@@ -41,5 +41,9 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.301.79")]
\ No newline at end of file
+#if BCL
+[assembly: AssemblyVersion("4.0")]
+#else
+[assembly: AssemblyVersion("4.0.0.0")]
+#endif
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/src/Services/SageMaker/AWSSDK.SageMaker.NetFramework.csproj b/sdk/src/Services/SageMaker/AWSSDK.SageMaker.NetFramework.csproj
index 5180158373b1..2ca46bb5810d 100644
--- a/sdk/src/Services/SageMaker/AWSSDK.SageMaker.NetFramework.csproj
+++ b/sdk/src/Services/SageMaker/AWSSDK.SageMaker.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);BCL;AWS_ASYNC_API;CODE_ANALYSIS</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(RuleSetFileForBuild)' == 'false' Or '$(RuleSetFileForBuild)' == '' ">
diff --git a/sdk/src/Services/SageMaker/AWSSDK.SageMaker.NetStandard.csproj b/sdk/src/Services/SageMaker/AWSSDK.SageMaker.NetStandard.csproj
index 26775f62d58a..41b8dc4e4512 100644
--- a/sdk/src/Services/SageMaker/AWSSDK.SageMaker.NetStandard.csproj
+++ b/sdk/src/Services/SageMaker/AWSSDK.SageMaker.NetStandard.csproj
@@ -22,6 +22,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <!-- Async Enumerable Compatibility -->
diff --git a/sdk/src/Services/SageMaker/Generated/AmazonSageMakerConfig.cs b/sdk/src/Services/SageMaker/Generated/AmazonSageMakerConfig.cs
index 3502468913f4..2810fca1f7e2 100644
--- a/sdk/src/Services/SageMaker/Generated/AmazonSageMakerConfig.cs
+++ b/sdk/src/Services/SageMaker/Generated/AmazonSageMakerConfig.cs
@@ -34,7 +34,7 @@ namespace Amazon.SageMaker
     public partial class AmazonSageMakerConfig : ClientConfig
     {
         private static readonly string UserAgentString =
-            InternalSDKUtils.BuildUserAgentString("SageMaker", "3.7.320.0");
+            InternalSDKUtils.BuildUserAgentString("SageMaker", "4.0.0.0");
 
         private static readonly AmazonSageMakerEndpointResolver EndpointResolver =
             new AmazonSageMakerEndpointResolver();
diff --git a/sdk/src/Services/SageMaker/Properties/AssemblyInfo.cs b/sdk/src/Services/SageMaker/Properties/AssemblyInfo.cs
index c83aecb5b713..2b7051d49440 100644
--- a/sdk/src/Services/SageMaker/Properties/AssemblyInfo.cs
+++ b/sdk/src/Services/SageMaker/Properties/AssemblyInfo.cs
@@ -41,5 +41,9 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.320.0")]
\ No newline at end of file
+#if BCL
+[assembly: AssemblyVersion("4.0")]
+#else
+[assembly: AssemblyVersion("4.0.0.0")]
+#endif
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/src/Services/SageMakerFeatureStoreRuntime/AWSSDK.SageMakerFeatureStoreRuntime.NetFramework.csproj b/sdk/src/Services/SageMakerFeatureStoreRuntime/AWSSDK.SageMakerFeatureStoreRuntime.NetFramework.csproj
index 7df118421005..be2ae220aaa2 100644
--- a/sdk/src/Services/SageMakerFeatureStoreRuntime/AWSSDK.SageMakerFeatureStoreRuntime.NetFramework.csproj
+++ b/sdk/src/Services/SageMakerFeatureStoreRuntime/AWSSDK.SageMakerFeatureStoreRuntime.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);BCL;AWS_ASYNC_API;CODE_ANALYSIS</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(RuleSetFileForBuild)' == 'false' Or '$(RuleSetFileForBuild)' == '' ">
diff --git a/sdk/src/Services/SageMakerFeatureStoreRuntime/AWSSDK.SageMakerFeatureStoreRuntime.NetStandard.csproj b/sdk/src/Services/SageMakerFeatureStoreRuntime/AWSSDK.SageMakerFeatureStoreRuntime.NetStandard.csproj
index b5f82ec5ead5..908f271f3a1a 100644
--- a/sdk/src/Services/SageMakerFeatureStoreRuntime/AWSSDK.SageMakerFeatureStoreRuntime.NetStandard.csproj
+++ b/sdk/src/Services/SageMakerFeatureStoreRuntime/AWSSDK.SageMakerFeatureStoreRuntime.NetStandard.csproj
@@ -22,6 +22,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <!-- Async Enumerable Compatibility -->
diff --git a/sdk/src/Services/SageMakerFeatureStoreRuntime/Generated/AmazonSageMakerFeatureStoreRuntimeConfig.cs b/sdk/src/Services/SageMakerFeatureStoreRuntime/Generated/AmazonSageMakerFeatureStoreRuntimeConfig.cs
index 4916d1d9324c..3bf685d63fad 100644
--- a/sdk/src/Services/SageMakerFeatureStoreRuntime/Generated/AmazonSageMakerFeatureStoreRuntimeConfig.cs
+++ b/sdk/src/Services/SageMakerFeatureStoreRuntime/Generated/AmazonSageMakerFeatureStoreRuntimeConfig.cs
@@ -34,7 +34,7 @@ namespace Amazon.SageMakerFeatureStoreRuntime
     public partial class AmazonSageMakerFeatureStoreRuntimeConfig : ClientConfig
     {
         private static readonly string UserAgentString =
-            InternalSDKUtils.BuildUserAgentString("SageMaker FeatureStore Runtime", "3.7.301.46");
+            InternalSDKUtils.BuildUserAgentString("SageMaker FeatureStore Runtime", "4.0.0.0");
 
         private static readonly AmazonSageMakerFeatureStoreRuntimeEndpointResolver EndpointResolver =
             new AmazonSageMakerFeatureStoreRuntimeEndpointResolver();
diff --git a/sdk/src/Services/SageMakerFeatureStoreRuntime/Properties/AssemblyInfo.cs b/sdk/src/Services/SageMakerFeatureStoreRuntime/Properties/AssemblyInfo.cs
index 1cb27c79e088..f5e2e435fff1 100644
--- a/sdk/src/Services/SageMakerFeatureStoreRuntime/Properties/AssemblyInfo.cs
+++ b/sdk/src/Services/SageMakerFeatureStoreRuntime/Properties/AssemblyInfo.cs
@@ -41,5 +41,9 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.301.46")]
\ No newline at end of file
+#if BCL
+[assembly: AssemblyVersion("4.0")]
+#else
+[assembly: AssemblyVersion("4.0.0.0")]
+#endif
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/src/Services/SageMakerGeospatial/AWSSDK.SageMakerGeospatial.NetFramework.csproj b/sdk/src/Services/SageMakerGeospatial/AWSSDK.SageMakerGeospatial.NetFramework.csproj
index aedb6dee1eb9..3531ab92810a 100644
--- a/sdk/src/Services/SageMakerGeospatial/AWSSDK.SageMakerGeospatial.NetFramework.csproj
+++ b/sdk/src/Services/SageMakerGeospatial/AWSSDK.SageMakerGeospatial.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);BCL;AWS_ASYNC_API;CODE_ANALYSIS</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(RuleSetFileForBuild)' == 'false' Or '$(RuleSetFileForBuild)' == '' ">
diff --git a/sdk/src/Services/SageMakerGeospatial/AWSSDK.SageMakerGeospatial.NetStandard.csproj b/sdk/src/Services/SageMakerGeospatial/AWSSDK.SageMakerGeospatial.NetStandard.csproj
index cebf2e9ee5a2..401cb5f624e0 100644
--- a/sdk/src/Services/SageMakerGeospatial/AWSSDK.SageMakerGeospatial.NetStandard.csproj
+++ b/sdk/src/Services/SageMakerGeospatial/AWSSDK.SageMakerGeospatial.NetStandard.csproj
@@ -22,6 +22,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <!-- Async Enumerable Compatibility -->
diff --git a/sdk/src/Services/SageMakerGeospatial/Generated/AmazonSageMakerGeospatialConfig.cs b/sdk/src/Services/SageMakerGeospatial/Generated/AmazonSageMakerGeospatialConfig.cs
index 30be89b535bc..bce6d537ef05 100644
--- a/sdk/src/Services/SageMakerGeospatial/Generated/AmazonSageMakerGeospatialConfig.cs
+++ b/sdk/src/Services/SageMakerGeospatial/Generated/AmazonSageMakerGeospatialConfig.cs
@@ -34,7 +34,7 @@ namespace Amazon.SageMakerGeospatial
     public partial class AmazonSageMakerGeospatialConfig : ClientConfig
     {
         private static readonly string UserAgentString =
-            InternalSDKUtils.BuildUserAgentString("SageMaker Geospatial", "3.7.300.84");
+            InternalSDKUtils.BuildUserAgentString("SageMaker Geospatial", "4.0.0.0");
 
         private static readonly AmazonSageMakerGeospatialEndpointResolver EndpointResolver =
             new AmazonSageMakerGeospatialEndpointResolver();
diff --git a/sdk/src/Services/SageMakerGeospatial/Properties/AssemblyInfo.cs b/sdk/src/Services/SageMakerGeospatial/Properties/AssemblyInfo.cs
index 7154e0a78fec..63728cc9242c 100644
--- a/sdk/src/Services/SageMakerGeospatial/Properties/AssemblyInfo.cs
+++ b/sdk/src/Services/SageMakerGeospatial/Properties/AssemblyInfo.cs
@@ -41,5 +41,9 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.300.84")]
\ No newline at end of file
+#if BCL
+[assembly: AssemblyVersion("4.0")]
+#else
+[assembly: AssemblyVersion("4.0.0.0")]
+#endif
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/src/Services/SageMakerMetrics/AWSSDK.SageMakerMetrics.NetFramework.csproj b/sdk/src/Services/SageMakerMetrics/AWSSDK.SageMakerMetrics.NetFramework.csproj
index 913ea26289f2..dd5f59433f83 100644
--- a/sdk/src/Services/SageMakerMetrics/AWSSDK.SageMakerMetrics.NetFramework.csproj
+++ b/sdk/src/Services/SageMakerMetrics/AWSSDK.SageMakerMetrics.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);BCL;AWS_ASYNC_API;CODE_ANALYSIS</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(RuleSetFileForBuild)' == 'false' Or '$(RuleSetFileForBuild)' == '' ">
diff --git a/sdk/src/Services/SageMakerMetrics/AWSSDK.SageMakerMetrics.NetStandard.csproj b/sdk/src/Services/SageMakerMetrics/AWSSDK.SageMakerMetrics.NetStandard.csproj
index 4d1d24288e3c..e6355b0ac24a 100644
--- a/sdk/src/Services/SageMakerMetrics/AWSSDK.SageMakerMetrics.NetStandard.csproj
+++ b/sdk/src/Services/SageMakerMetrics/AWSSDK.SageMakerMetrics.NetStandard.csproj
@@ -22,6 +22,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <!-- Async Enumerable Compatibility -->
diff --git a/sdk/src/Services/SageMakerMetrics/Generated/AmazonSageMakerMetricsConfig.cs b/sdk/src/Services/SageMakerMetrics/Generated/AmazonSageMakerMetricsConfig.cs
index 4839332221bc..9ab3d4cab110 100644
--- a/sdk/src/Services/SageMakerMetrics/Generated/AmazonSageMakerMetricsConfig.cs
+++ b/sdk/src/Services/SageMakerMetrics/Generated/AmazonSageMakerMetricsConfig.cs
@@ -34,7 +34,7 @@ namespace Amazon.SageMakerMetrics
     public partial class AmazonSageMakerMetricsConfig : ClientConfig
     {
         private static readonly string UserAgentString =
-            InternalSDKUtils.BuildUserAgentString("SageMaker Metrics", "3.7.300.84");
+            InternalSDKUtils.BuildUserAgentString("SageMaker Metrics", "4.0.0.0");
 
         private static readonly AmazonSageMakerMetricsEndpointResolver EndpointResolver =
             new AmazonSageMakerMetricsEndpointResolver();
diff --git a/sdk/src/Services/SageMakerMetrics/Properties/AssemblyInfo.cs b/sdk/src/Services/SageMakerMetrics/Properties/AssemblyInfo.cs
index e8c315c00b70..2be7c7f37b9f 100644
--- a/sdk/src/Services/SageMakerMetrics/Properties/AssemblyInfo.cs
+++ b/sdk/src/Services/SageMakerMetrics/Properties/AssemblyInfo.cs
@@ -41,5 +41,9 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.300.84")]
\ No newline at end of file
+#if BCL
+[assembly: AssemblyVersion("4.0")]
+#else
+[assembly: AssemblyVersion("4.0.0.0")]
+#endif
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/src/Services/SageMakerRuntime/AWSSDK.SageMakerRuntime.NetFramework.csproj b/sdk/src/Services/SageMakerRuntime/AWSSDK.SageMakerRuntime.NetFramework.csproj
index 2afdf0a52949..68c18bb77b8e 100644
--- a/sdk/src/Services/SageMakerRuntime/AWSSDK.SageMakerRuntime.NetFramework.csproj
+++ b/sdk/src/Services/SageMakerRuntime/AWSSDK.SageMakerRuntime.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);BCL;AWS_ASYNC_API;CODE_ANALYSIS</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(RuleSetFileForBuild)' == 'false' Or '$(RuleSetFileForBuild)' == '' ">
diff --git a/sdk/src/Services/SageMakerRuntime/AWSSDK.SageMakerRuntime.NetStandard.csproj b/sdk/src/Services/SageMakerRuntime/AWSSDK.SageMakerRuntime.NetStandard.csproj
index ba4d4d5f1d96..d58c6ce4ca75 100644
--- a/sdk/src/Services/SageMakerRuntime/AWSSDK.SageMakerRuntime.NetStandard.csproj
+++ b/sdk/src/Services/SageMakerRuntime/AWSSDK.SageMakerRuntime.NetStandard.csproj
@@ -22,6 +22,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <!-- Async Enumerable Compatibility -->
diff --git a/sdk/src/Services/SageMakerRuntime/Generated/AmazonSageMakerRuntimeConfig.cs b/sdk/src/Services/SageMakerRuntime/Generated/AmazonSageMakerRuntimeConfig.cs
index a0273b0e264e..a497669b30ae 100644
--- a/sdk/src/Services/SageMakerRuntime/Generated/AmazonSageMakerRuntimeConfig.cs
+++ b/sdk/src/Services/SageMakerRuntime/Generated/AmazonSageMakerRuntimeConfig.cs
@@ -34,7 +34,7 @@ namespace Amazon.SageMakerRuntime
     public partial class AmazonSageMakerRuntimeConfig : ClientConfig
     {
         private static readonly string UserAgentString =
-            InternalSDKUtils.BuildUserAgentString("SageMaker Runtime", "3.7.301.73");
+            InternalSDKUtils.BuildUserAgentString("SageMaker Runtime", "4.0.0.0");
 
         private static readonly AmazonSageMakerRuntimeEndpointResolver EndpointResolver =
             new AmazonSageMakerRuntimeEndpointResolver();
diff --git a/sdk/src/Services/SageMakerRuntime/Properties/AssemblyInfo.cs b/sdk/src/Services/SageMakerRuntime/Properties/AssemblyInfo.cs
index 1eea0c7875e3..7356f443e18f 100644
--- a/sdk/src/Services/SageMakerRuntime/Properties/AssemblyInfo.cs
+++ b/sdk/src/Services/SageMakerRuntime/Properties/AssemblyInfo.cs
@@ -41,5 +41,9 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.301.73")]
\ No newline at end of file
+#if BCL
+[assembly: AssemblyVersion("4.0")]
+#else
+[assembly: AssemblyVersion("4.0.0.0")]
+#endif
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/src/Services/SagemakerEdgeManager/AWSSDK.SagemakerEdgeManager.NetFramework.csproj b/sdk/src/Services/SagemakerEdgeManager/AWSSDK.SagemakerEdgeManager.NetFramework.csproj
index 75a14f00175f..7fccfd0f50c2 100644
--- a/sdk/src/Services/SagemakerEdgeManager/AWSSDK.SagemakerEdgeManager.NetFramework.csproj
+++ b/sdk/src/Services/SagemakerEdgeManager/AWSSDK.SagemakerEdgeManager.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);BCL;AWS_ASYNC_API;CODE_ANALYSIS</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(RuleSetFileForBuild)' == 'false' Or '$(RuleSetFileForBuild)' == '' ">
diff --git a/sdk/src/Services/SagemakerEdgeManager/AWSSDK.SagemakerEdgeManager.NetStandard.csproj b/sdk/src/Services/SagemakerEdgeManager/AWSSDK.SagemakerEdgeManager.NetStandard.csproj
index a6c65ef690de..02bccde10af0 100644
--- a/sdk/src/Services/SagemakerEdgeManager/AWSSDK.SagemakerEdgeManager.NetStandard.csproj
+++ b/sdk/src/Services/SagemakerEdgeManager/AWSSDK.SagemakerEdgeManager.NetStandard.csproj
@@ -22,6 +22,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <!-- Async Enumerable Compatibility -->
diff --git a/sdk/src/Services/SagemakerEdgeManager/Generated/AmazonSagemakerEdgeManagerConfig.cs b/sdk/src/Services/SagemakerEdgeManager/Generated/AmazonSagemakerEdgeManagerConfig.cs
index f9c1e2c8bf6d..819297b87854 100644
--- a/sdk/src/Services/SagemakerEdgeManager/Generated/AmazonSagemakerEdgeManagerConfig.cs
+++ b/sdk/src/Services/SagemakerEdgeManager/Generated/AmazonSagemakerEdgeManagerConfig.cs
@@ -34,7 +34,7 @@ namespace Amazon.SagemakerEdgeManager
     public partial class AmazonSagemakerEdgeManagerConfig : ClientConfig
     {
         private static readonly string UserAgentString =
-            InternalSDKUtils.BuildUserAgentString("Sagemaker Edge", "3.7.300.84");
+            InternalSDKUtils.BuildUserAgentString("Sagemaker Edge", "4.0.0.0");
 
         private static readonly AmazonSagemakerEdgeManagerEndpointResolver EndpointResolver =
             new AmazonSagemakerEdgeManagerEndpointResolver();
diff --git a/sdk/src/Services/SagemakerEdgeManager/Properties/AssemblyInfo.cs b/sdk/src/Services/SagemakerEdgeManager/Properties/AssemblyInfo.cs
index 7813e6aa3b88..4d4967243e41 100644
--- a/sdk/src/Services/SagemakerEdgeManager/Properties/AssemblyInfo.cs
+++ b/sdk/src/Services/SagemakerEdgeManager/Properties/AssemblyInfo.cs
@@ -41,5 +41,9 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.300.84")]
\ No newline at end of file
+#if BCL
+[assembly: AssemblyVersion("4.0")]
+#else
+[assembly: AssemblyVersion("4.0.0.0")]
+#endif
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/src/Services/SavingsPlans/AWSSDK.SavingsPlans.NetFramework.csproj b/sdk/src/Services/SavingsPlans/AWSSDK.SavingsPlans.NetFramework.csproj
index 72f311c01839..270754441ca9 100644
--- a/sdk/src/Services/SavingsPlans/AWSSDK.SavingsPlans.NetFramework.csproj
+++ b/sdk/src/Services/SavingsPlans/AWSSDK.SavingsPlans.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);BCL;AWS_ASYNC_API;CODE_ANALYSIS</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(RuleSetFileForBuild)' == 'false' Or '$(RuleSetFileForBuild)' == '' ">
diff --git a/sdk/src/Services/SavingsPlans/AWSSDK.SavingsPlans.NetStandard.csproj b/sdk/src/Services/SavingsPlans/AWSSDK.SavingsPlans.NetStandard.csproj
index eb4f87960514..50bbe7d0cbfd 100644
--- a/sdk/src/Services/SavingsPlans/AWSSDK.SavingsPlans.NetStandard.csproj
+++ b/sdk/src/Services/SavingsPlans/AWSSDK.SavingsPlans.NetStandard.csproj
@@ -22,6 +22,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <!-- Async Enumerable Compatibility -->
diff --git a/sdk/src/Services/SavingsPlans/Generated/AmazonSavingsPlansConfig.cs b/sdk/src/Services/SavingsPlans/Generated/AmazonSavingsPlansConfig.cs
index a1c45f0abb1b..3815311facf8 100644
--- a/sdk/src/Services/SavingsPlans/Generated/AmazonSavingsPlansConfig.cs
+++ b/sdk/src/Services/SavingsPlans/Generated/AmazonSavingsPlansConfig.cs
@@ -34,7 +34,7 @@ namespace Amazon.SavingsPlans
     public partial class AmazonSavingsPlansConfig : ClientConfig
     {
         private static readonly string UserAgentString =
-            InternalSDKUtils.BuildUserAgentString("savingsplans", "3.7.301.25");
+            InternalSDKUtils.BuildUserAgentString("savingsplans", "4.0.0.0");
 
         private static readonly AmazonSavingsPlansEndpointResolver EndpointResolver =
             new AmazonSavingsPlansEndpointResolver();
diff --git a/sdk/src/Services/SavingsPlans/Properties/AssemblyInfo.cs b/sdk/src/Services/SavingsPlans/Properties/AssemblyInfo.cs
index 1f63a48d82b0..d6a327244fd5 100644
--- a/sdk/src/Services/SavingsPlans/Properties/AssemblyInfo.cs
+++ b/sdk/src/Services/SavingsPlans/Properties/AssemblyInfo.cs
@@ -41,5 +41,9 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.301.25")]
\ No newline at end of file
+#if BCL
+[assembly: AssemblyVersion("4.0")]
+#else
+[assembly: AssemblyVersion("4.0.0.0")]
+#endif
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/src/Services/Scheduler/AWSSDK.Scheduler.NetFramework.csproj b/sdk/src/Services/Scheduler/AWSSDK.Scheduler.NetFramework.csproj
index 367f8080c983..6bb422848959 100644
--- a/sdk/src/Services/Scheduler/AWSSDK.Scheduler.NetFramework.csproj
+++ b/sdk/src/Services/Scheduler/AWSSDK.Scheduler.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);BCL;AWS_ASYNC_API;CODE_ANALYSIS</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(RuleSetFileForBuild)' == 'false' Or '$(RuleSetFileForBuild)' == '' ">
diff --git a/sdk/src/Services/Scheduler/AWSSDK.Scheduler.NetStandard.csproj b/sdk/src/Services/Scheduler/AWSSDK.Scheduler.NetStandard.csproj
index e4e5bfd57445..81ea80d093c6 100644
--- a/sdk/src/Services/Scheduler/AWSSDK.Scheduler.NetStandard.csproj
+++ b/sdk/src/Services/Scheduler/AWSSDK.Scheduler.NetStandard.csproj
@@ -22,6 +22,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <!-- Async Enumerable Compatibility -->
diff --git a/sdk/src/Services/Scheduler/Generated/AmazonSchedulerConfig.cs b/sdk/src/Services/Scheduler/Generated/AmazonSchedulerConfig.cs
index a2eed2b041e3..1ffd6f528e3c 100644
--- a/sdk/src/Services/Scheduler/Generated/AmazonSchedulerConfig.cs
+++ b/sdk/src/Services/Scheduler/Generated/AmazonSchedulerConfig.cs
@@ -34,7 +34,7 @@ namespace Amazon.Scheduler
     public partial class AmazonSchedulerConfig : ClientConfig
     {
         private static readonly string UserAgentString =
-            InternalSDKUtils.BuildUserAgentString("Scheduler", "3.7.300.84");
+            InternalSDKUtils.BuildUserAgentString("Scheduler", "4.0.0.0");
 
         private static readonly AmazonSchedulerEndpointResolver EndpointResolver =
             new AmazonSchedulerEndpointResolver();
diff --git a/sdk/src/Services/Scheduler/Properties/AssemblyInfo.cs b/sdk/src/Services/Scheduler/Properties/AssemblyInfo.cs
index 78a0115b96f6..4d61fadc7052 100644
--- a/sdk/src/Services/Scheduler/Properties/AssemblyInfo.cs
+++ b/sdk/src/Services/Scheduler/Properties/AssemblyInfo.cs
@@ -41,5 +41,9 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.300.84")]
\ No newline at end of file
+#if BCL
+[assembly: AssemblyVersion("4.0")]
+#else
+[assembly: AssemblyVersion("4.0.0.0")]
+#endif
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/src/Services/Schemas/AWSSDK.Schemas.NetFramework.csproj b/sdk/src/Services/Schemas/AWSSDK.Schemas.NetFramework.csproj
index 794cbe64a042..fc142bc05468 100644
--- a/sdk/src/Services/Schemas/AWSSDK.Schemas.NetFramework.csproj
+++ b/sdk/src/Services/Schemas/AWSSDK.Schemas.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);BCL;AWS_ASYNC_API;CODE_ANALYSIS</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(RuleSetFileForBuild)' == 'false' Or '$(RuleSetFileForBuild)' == '' ">
diff --git a/sdk/src/Services/Schemas/AWSSDK.Schemas.NetStandard.csproj b/sdk/src/Services/Schemas/AWSSDK.Schemas.NetStandard.csproj
index 17b5093d7462..356642a70e08 100644
--- a/sdk/src/Services/Schemas/AWSSDK.Schemas.NetStandard.csproj
+++ b/sdk/src/Services/Schemas/AWSSDK.Schemas.NetStandard.csproj
@@ -22,6 +22,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <!-- Async Enumerable Compatibility -->
diff --git a/sdk/src/Services/Schemas/Generated/AmazonSchemasConfig.cs b/sdk/src/Services/Schemas/Generated/AmazonSchemasConfig.cs
index 013a0b7dc4fa..65dc68ceb45e 100644
--- a/sdk/src/Services/Schemas/Generated/AmazonSchemasConfig.cs
+++ b/sdk/src/Services/Schemas/Generated/AmazonSchemasConfig.cs
@@ -34,7 +34,7 @@ namespace Amazon.Schemas
     public partial class AmazonSchemasConfig : ClientConfig
     {
         private static readonly string UserAgentString =
-            InternalSDKUtils.BuildUserAgentString("schemas", "3.7.300.84");
+            InternalSDKUtils.BuildUserAgentString("schemas", "4.0.0.0");
 
         private static readonly AmazonSchemasEndpointResolver EndpointResolver =
             new AmazonSchemasEndpointResolver();
diff --git a/sdk/src/Services/Schemas/Properties/AssemblyInfo.cs b/sdk/src/Services/Schemas/Properties/AssemblyInfo.cs
index f62abd9359d1..01fc6b3f459a 100644
--- a/sdk/src/Services/Schemas/Properties/AssemblyInfo.cs
+++ b/sdk/src/Services/Schemas/Properties/AssemblyInfo.cs
@@ -41,5 +41,9 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.300.84")]
\ No newline at end of file
+#if BCL
+[assembly: AssemblyVersion("4.0")]
+#else
+[assembly: AssemblyVersion("4.0.0.0")]
+#endif
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/src/Services/SecretsManager/AWSSDK.SecretsManager.NetFramework.csproj b/sdk/src/Services/SecretsManager/AWSSDK.SecretsManager.NetFramework.csproj
index f27b9931b82a..ca28bcf8c697 100644
--- a/sdk/src/Services/SecretsManager/AWSSDK.SecretsManager.NetFramework.csproj
+++ b/sdk/src/Services/SecretsManager/AWSSDK.SecretsManager.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);BCL;AWS_ASYNC_API;CODE_ANALYSIS</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(RuleSetFileForBuild)' == 'false' Or '$(RuleSetFileForBuild)' == '' ">
diff --git a/sdk/src/Services/SecretsManager/AWSSDK.SecretsManager.NetStandard.csproj b/sdk/src/Services/SecretsManager/AWSSDK.SecretsManager.NetStandard.csproj
index 73794ed770a9..c2b14377710f 100644
--- a/sdk/src/Services/SecretsManager/AWSSDK.SecretsManager.NetStandard.csproj
+++ b/sdk/src/Services/SecretsManager/AWSSDK.SecretsManager.NetStandard.csproj
@@ -22,6 +22,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <!-- Async Enumerable Compatibility -->
diff --git a/sdk/src/Services/SecretsManager/Generated/AmazonSecretsManagerConfig.cs b/sdk/src/Services/SecretsManager/Generated/AmazonSecretsManagerConfig.cs
index b695da56f574..a04f028f5e8f 100644
--- a/sdk/src/Services/SecretsManager/Generated/AmazonSecretsManagerConfig.cs
+++ b/sdk/src/Services/SecretsManager/Generated/AmazonSecretsManagerConfig.cs
@@ -34,7 +34,7 @@ namespace Amazon.SecretsManager
     public partial class AmazonSecretsManagerConfig : ClientConfig
     {
         private static readonly string UserAgentString =
-            InternalSDKUtils.BuildUserAgentString("Secrets Manager", "3.7.302.59");
+            InternalSDKUtils.BuildUserAgentString("Secrets Manager", "4.0.0.0");
 
         private static readonly AmazonSecretsManagerEndpointResolver EndpointResolver =
             new AmazonSecretsManagerEndpointResolver();
diff --git a/sdk/src/Services/SecretsManager/Properties/AssemblyInfo.cs b/sdk/src/Services/SecretsManager/Properties/AssemblyInfo.cs
index 7962608f79bb..fa2eab7d3689 100644
--- a/sdk/src/Services/SecretsManager/Properties/AssemblyInfo.cs
+++ b/sdk/src/Services/SecretsManager/Properties/AssemblyInfo.cs
@@ -41,5 +41,9 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.302.59")]
\ No newline at end of file
+#if BCL
+[assembly: AssemblyVersion("4.0")]
+#else
+[assembly: AssemblyVersion("4.0.0.0")]
+#endif
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/src/Services/SecurityHub/AWSSDK.SecurityHub.NetFramework.csproj b/sdk/src/Services/SecurityHub/AWSSDK.SecurityHub.NetFramework.csproj
index e3ed7ad14872..428bc5dbc4fd 100644
--- a/sdk/src/Services/SecurityHub/AWSSDK.SecurityHub.NetFramework.csproj
+++ b/sdk/src/Services/SecurityHub/AWSSDK.SecurityHub.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);BCL;AWS_ASYNC_API;CODE_ANALYSIS</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(RuleSetFileForBuild)' == 'false' Or '$(RuleSetFileForBuild)' == '' ">
diff --git a/sdk/src/Services/SecurityHub/AWSSDK.SecurityHub.NetStandard.csproj b/sdk/src/Services/SecurityHub/AWSSDK.SecurityHub.NetStandard.csproj
index 591b72251341..eac5147e2b63 100644
--- a/sdk/src/Services/SecurityHub/AWSSDK.SecurityHub.NetStandard.csproj
+++ b/sdk/src/Services/SecurityHub/AWSSDK.SecurityHub.NetStandard.csproj
@@ -22,6 +22,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <!-- Async Enumerable Compatibility -->
diff --git a/sdk/src/Services/SecurityHub/Generated/AmazonSecurityHubConfig.cs b/sdk/src/Services/SecurityHub/Generated/AmazonSecurityHubConfig.cs
index ffe2ac663e44..b1e2fed1addc 100644
--- a/sdk/src/Services/SecurityHub/Generated/AmazonSecurityHubConfig.cs
+++ b/sdk/src/Services/SecurityHub/Generated/AmazonSecurityHubConfig.cs
@@ -34,7 +34,7 @@ namespace Amazon.SecurityHub
     public partial class AmazonSecurityHubConfig : ClientConfig
     {
         private static readonly string UserAgentString =
-            InternalSDKUtils.BuildUserAgentString("SecurityHub", "3.7.304.24");
+            InternalSDKUtils.BuildUserAgentString("SecurityHub", "4.0.0.0");
 
         private static readonly AmazonSecurityHubEndpointResolver EndpointResolver =
             new AmazonSecurityHubEndpointResolver();
diff --git a/sdk/src/Services/SecurityHub/Properties/AssemblyInfo.cs b/sdk/src/Services/SecurityHub/Properties/AssemblyInfo.cs
index cd5727338aea..8df3c1a93508 100644
--- a/sdk/src/Services/SecurityHub/Properties/AssemblyInfo.cs
+++ b/sdk/src/Services/SecurityHub/Properties/AssemblyInfo.cs
@@ -41,5 +41,9 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.304.24")]
\ No newline at end of file
+#if BCL
+[assembly: AssemblyVersion("4.0")]
+#else
+[assembly: AssemblyVersion("4.0.0.0")]
+#endif
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/src/Services/SecurityLake/AWSSDK.SecurityLake.NetFramework.csproj b/sdk/src/Services/SecurityLake/AWSSDK.SecurityLake.NetFramework.csproj
index 7b2a9810fb35..cfb71e42a96e 100644
--- a/sdk/src/Services/SecurityLake/AWSSDK.SecurityLake.NetFramework.csproj
+++ b/sdk/src/Services/SecurityLake/AWSSDK.SecurityLake.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);BCL;AWS_ASYNC_API;CODE_ANALYSIS</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(RuleSetFileForBuild)' == 'false' Or '$(RuleSetFileForBuild)' == '' ">
diff --git a/sdk/src/Services/SecurityLake/AWSSDK.SecurityLake.NetStandard.csproj b/sdk/src/Services/SecurityLake/AWSSDK.SecurityLake.NetStandard.csproj
index 56eb964cf372..9dc89f271904 100644
--- a/sdk/src/Services/SecurityLake/AWSSDK.SecurityLake.NetStandard.csproj
+++ b/sdk/src/Services/SecurityLake/AWSSDK.SecurityLake.NetStandard.csproj
@@ -22,6 +22,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <!-- Async Enumerable Compatibility -->
diff --git a/sdk/src/Services/SecurityLake/Generated/AmazonSecurityLakeConfig.cs b/sdk/src/Services/SecurityLake/Generated/AmazonSecurityLakeConfig.cs
index 3582ae3a4e3a..cd3e3c029165 100644
--- a/sdk/src/Services/SecurityLake/Generated/AmazonSecurityLakeConfig.cs
+++ b/sdk/src/Services/SecurityLake/Generated/AmazonSecurityLakeConfig.cs
@@ -34,7 +34,7 @@ namespace Amazon.SecurityLake
     public partial class AmazonSecurityLakeConfig : ClientConfig
     {
         private static readonly string UserAgentString =
-            InternalSDKUtils.BuildUserAgentString("SecurityLake", "3.7.301.30");
+            InternalSDKUtils.BuildUserAgentString("SecurityLake", "4.0.0.0");
 
         private static readonly AmazonSecurityLakeEndpointResolver EndpointResolver =
             new AmazonSecurityLakeEndpointResolver();
diff --git a/sdk/src/Services/SecurityLake/Properties/AssemblyInfo.cs b/sdk/src/Services/SecurityLake/Properties/AssemblyInfo.cs
index 1f165ec950d4..18eb69dddbdd 100644
--- a/sdk/src/Services/SecurityLake/Properties/AssemblyInfo.cs
+++ b/sdk/src/Services/SecurityLake/Properties/AssemblyInfo.cs
@@ -41,5 +41,9 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.301.30")]
\ No newline at end of file
+#if BCL
+[assembly: AssemblyVersion("4.0")]
+#else
+[assembly: AssemblyVersion("4.0.0.0")]
+#endif
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/src/Services/SecurityToken/AWSSDK.SecurityToken.NetFramework.csproj b/sdk/src/Services/SecurityToken/AWSSDK.SecurityToken.NetFramework.csproj
index f82c4b666bc7..8f4c74c278e4 100644
--- a/sdk/src/Services/SecurityToken/AWSSDK.SecurityToken.NetFramework.csproj
+++ b/sdk/src/Services/SecurityToken/AWSSDK.SecurityToken.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);BCL;AWS_ASYNC_API;CODE_ANALYSIS</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(RuleSetFileForBuild)' == 'false' Or '$(RuleSetFileForBuild)' == '' ">
diff --git a/sdk/src/Services/SecurityToken/AWSSDK.SecurityToken.NetStandard.csproj b/sdk/src/Services/SecurityToken/AWSSDK.SecurityToken.NetStandard.csproj
index 22b17678b1a3..50dd9af3ac15 100644
--- a/sdk/src/Services/SecurityToken/AWSSDK.SecurityToken.NetStandard.csproj
+++ b/sdk/src/Services/SecurityToken/AWSSDK.SecurityToken.NetStandard.csproj
@@ -22,6 +22,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <!-- Async Enumerable Compatibility -->
diff --git a/sdk/src/Services/SecurityToken/Generated/AmazonSecurityTokenServiceConfig.cs b/sdk/src/Services/SecurityToken/Generated/AmazonSecurityTokenServiceConfig.cs
index dd49d2b993cf..f64f3c612889 100644
--- a/sdk/src/Services/SecurityToken/Generated/AmazonSecurityTokenServiceConfig.cs
+++ b/sdk/src/Services/SecurityToken/Generated/AmazonSecurityTokenServiceConfig.cs
@@ -34,7 +34,7 @@ namespace Amazon.SecurityToken
     public partial class AmazonSecurityTokenServiceConfig : ClientConfig
     {
         private static readonly string UserAgentString =
-            InternalSDKUtils.BuildUserAgentString("STS", "3.7.300.85");
+            InternalSDKUtils.BuildUserAgentString("STS", "4.0.0.0");
 
         private static readonly AmazonSecurityTokenServiceEndpointResolver EndpointResolver =
             new AmazonSecurityTokenServiceEndpointResolver();
diff --git a/sdk/src/Services/SecurityToken/Properties/AssemblyInfo.cs b/sdk/src/Services/SecurityToken/Properties/AssemblyInfo.cs
index 3de4b6edf320..42b82106f2c9 100644
--- a/sdk/src/Services/SecurityToken/Properties/AssemblyInfo.cs
+++ b/sdk/src/Services/SecurityToken/Properties/AssemblyInfo.cs
@@ -41,5 +41,9 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.300.85")]
\ No newline at end of file
+#if BCL
+[assembly: AssemblyVersion("4.0")]
+#else
+[assembly: AssemblyVersion("4.0.0.0")]
+#endif
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/src/Services/ServerMigrationService/AWSSDK.ServerMigrationService.NetFramework.csproj b/sdk/src/Services/ServerMigrationService/AWSSDK.ServerMigrationService.NetFramework.csproj
index e33bb8bf4329..0ddbdaef04eb 100644
--- a/sdk/src/Services/ServerMigrationService/AWSSDK.ServerMigrationService.NetFramework.csproj
+++ b/sdk/src/Services/ServerMigrationService/AWSSDK.ServerMigrationService.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);BCL;AWS_ASYNC_API;CODE_ANALYSIS</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(RuleSetFileForBuild)' == 'false' Or '$(RuleSetFileForBuild)' == '' ">
diff --git a/sdk/src/Services/ServerMigrationService/AWSSDK.ServerMigrationService.NetStandard.csproj b/sdk/src/Services/ServerMigrationService/AWSSDK.ServerMigrationService.NetStandard.csproj
index 4583648023eb..5b94cb65e1c7 100644
--- a/sdk/src/Services/ServerMigrationService/AWSSDK.ServerMigrationService.NetStandard.csproj
+++ b/sdk/src/Services/ServerMigrationService/AWSSDK.ServerMigrationService.NetStandard.csproj
@@ -22,6 +22,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <!-- Async Enumerable Compatibility -->
diff --git a/sdk/src/Services/ServerMigrationService/Generated/AmazonServerMigrationServiceConfig.cs b/sdk/src/Services/ServerMigrationService/Generated/AmazonServerMigrationServiceConfig.cs
index 4312418c44fd..2ef137e18a0c 100644
--- a/sdk/src/Services/ServerMigrationService/Generated/AmazonServerMigrationServiceConfig.cs
+++ b/sdk/src/Services/ServerMigrationService/Generated/AmazonServerMigrationServiceConfig.cs
@@ -34,7 +34,7 @@ namespace Amazon.ServerMigrationService
     public partial class AmazonServerMigrationServiceConfig : ClientConfig
     {
         private static readonly string UserAgentString =
-            InternalSDKUtils.BuildUserAgentString("SMS", "3.7.300.84");
+            InternalSDKUtils.BuildUserAgentString("SMS", "4.0.0.0");
 
         private static readonly AmazonServerMigrationServiceEndpointResolver EndpointResolver =
             new AmazonServerMigrationServiceEndpointResolver();
diff --git a/sdk/src/Services/ServerMigrationService/Properties/AssemblyInfo.cs b/sdk/src/Services/ServerMigrationService/Properties/AssemblyInfo.cs
index da97cc59201e..a55ca0729552 100644
--- a/sdk/src/Services/ServerMigrationService/Properties/AssemblyInfo.cs
+++ b/sdk/src/Services/ServerMigrationService/Properties/AssemblyInfo.cs
@@ -41,5 +41,9 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.300.84")]
\ No newline at end of file
+#if BCL
+[assembly: AssemblyVersion("4.0")]
+#else
+[assembly: AssemblyVersion("4.0.0.0")]
+#endif
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/src/Services/ServerlessApplicationRepository/AWSSDK.ServerlessApplicationRepository.NetFramework.csproj b/sdk/src/Services/ServerlessApplicationRepository/AWSSDK.ServerlessApplicationRepository.NetFramework.csproj
index 99e287c44f46..77b0fb466e46 100644
--- a/sdk/src/Services/ServerlessApplicationRepository/AWSSDK.ServerlessApplicationRepository.NetFramework.csproj
+++ b/sdk/src/Services/ServerlessApplicationRepository/AWSSDK.ServerlessApplicationRepository.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);BCL;AWS_ASYNC_API;CODE_ANALYSIS</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(RuleSetFileForBuild)' == 'false' Or '$(RuleSetFileForBuild)' == '' ">
diff --git a/sdk/src/Services/ServerlessApplicationRepository/AWSSDK.ServerlessApplicationRepository.NetStandard.csproj b/sdk/src/Services/ServerlessApplicationRepository/AWSSDK.ServerlessApplicationRepository.NetStandard.csproj
index e636e79821c9..3c9b5ef6a65f 100644
--- a/sdk/src/Services/ServerlessApplicationRepository/AWSSDK.ServerlessApplicationRepository.NetStandard.csproj
+++ b/sdk/src/Services/ServerlessApplicationRepository/AWSSDK.ServerlessApplicationRepository.NetStandard.csproj
@@ -22,6 +22,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <!-- Async Enumerable Compatibility -->
diff --git a/sdk/src/Services/ServerlessApplicationRepository/Generated/AmazonServerlessApplicationRepositoryConfig.cs b/sdk/src/Services/ServerlessApplicationRepository/Generated/AmazonServerlessApplicationRepositoryConfig.cs
index 5999ee60dcb5..a7fe2c15e3fd 100644
--- a/sdk/src/Services/ServerlessApplicationRepository/Generated/AmazonServerlessApplicationRepositoryConfig.cs
+++ b/sdk/src/Services/ServerlessApplicationRepository/Generated/AmazonServerlessApplicationRepositoryConfig.cs
@@ -34,7 +34,7 @@ namespace Amazon.ServerlessApplicationRepository
     public partial class AmazonServerlessApplicationRepositoryConfig : ClientConfig
     {
         private static readonly string UserAgentString =
-            InternalSDKUtils.BuildUserAgentString("ServerlessApplicationRepository", "3.7.300.84");
+            InternalSDKUtils.BuildUserAgentString("ServerlessApplicationRepository", "4.0.0.0");
 
         private static readonly AmazonServerlessApplicationRepositoryEndpointResolver EndpointResolver =
             new AmazonServerlessApplicationRepositoryEndpointResolver();
diff --git a/sdk/src/Services/ServerlessApplicationRepository/Properties/AssemblyInfo.cs b/sdk/src/Services/ServerlessApplicationRepository/Properties/AssemblyInfo.cs
index 3e49ec569af7..a3c937df96fc 100644
--- a/sdk/src/Services/ServerlessApplicationRepository/Properties/AssemblyInfo.cs
+++ b/sdk/src/Services/ServerlessApplicationRepository/Properties/AssemblyInfo.cs
@@ -41,5 +41,9 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.300.84")]
\ No newline at end of file
+#if BCL
+[assembly: AssemblyVersion("4.0")]
+#else
+[assembly: AssemblyVersion("4.0.0.0")]
+#endif
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/src/Services/ServiceCatalog/AWSSDK.ServiceCatalog.NetFramework.csproj b/sdk/src/Services/ServiceCatalog/AWSSDK.ServiceCatalog.NetFramework.csproj
index ef5e08371e15..ccd60b0f4e7b 100644
--- a/sdk/src/Services/ServiceCatalog/AWSSDK.ServiceCatalog.NetFramework.csproj
+++ b/sdk/src/Services/ServiceCatalog/AWSSDK.ServiceCatalog.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);BCL;AWS_ASYNC_API;CODE_ANALYSIS</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(RuleSetFileForBuild)' == 'false' Or '$(RuleSetFileForBuild)' == '' ">
diff --git a/sdk/src/Services/ServiceCatalog/AWSSDK.ServiceCatalog.NetStandard.csproj b/sdk/src/Services/ServiceCatalog/AWSSDK.ServiceCatalog.NetStandard.csproj
index d40d3b27f2e6..fd810edc1c16 100644
--- a/sdk/src/Services/ServiceCatalog/AWSSDK.ServiceCatalog.NetStandard.csproj
+++ b/sdk/src/Services/ServiceCatalog/AWSSDK.ServiceCatalog.NetStandard.csproj
@@ -22,6 +22,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <!-- Async Enumerable Compatibility -->
diff --git a/sdk/src/Services/ServiceCatalog/Generated/AmazonServiceCatalogConfig.cs b/sdk/src/Services/ServiceCatalog/Generated/AmazonServiceCatalogConfig.cs
index d4484e342fdc..98e85a372840 100644
--- a/sdk/src/Services/ServiceCatalog/Generated/AmazonServiceCatalogConfig.cs
+++ b/sdk/src/Services/ServiceCatalog/Generated/AmazonServiceCatalogConfig.cs
@@ -34,7 +34,7 @@ namespace Amazon.ServiceCatalog
     public partial class AmazonServiceCatalogConfig : ClientConfig
     {
         private static readonly string UserAgentString =
-            InternalSDKUtils.BuildUserAgentString("Service Catalog", "3.7.301.54");
+            InternalSDKUtils.BuildUserAgentString("Service Catalog", "4.0.0.0");
 
         private static readonly AmazonServiceCatalogEndpointResolver EndpointResolver =
             new AmazonServiceCatalogEndpointResolver();
diff --git a/sdk/src/Services/ServiceCatalog/Properties/AssemblyInfo.cs b/sdk/src/Services/ServiceCatalog/Properties/AssemblyInfo.cs
index 9e60b479c5d8..22306f29c0c0 100644
--- a/sdk/src/Services/ServiceCatalog/Properties/AssemblyInfo.cs
+++ b/sdk/src/Services/ServiceCatalog/Properties/AssemblyInfo.cs
@@ -41,5 +41,9 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.301.54")]
\ No newline at end of file
+#if BCL
+[assembly: AssemblyVersion("4.0")]
+#else
+[assembly: AssemblyVersion("4.0.0.0")]
+#endif
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/src/Services/ServiceDiscovery/AWSSDK.ServiceDiscovery.NetFramework.csproj b/sdk/src/Services/ServiceDiscovery/AWSSDK.ServiceDiscovery.NetFramework.csproj
index b3250851f187..e20d0ae6b9b2 100644
--- a/sdk/src/Services/ServiceDiscovery/AWSSDK.ServiceDiscovery.NetFramework.csproj
+++ b/sdk/src/Services/ServiceDiscovery/AWSSDK.ServiceDiscovery.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);BCL;AWS_ASYNC_API;CODE_ANALYSIS</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(RuleSetFileForBuild)' == 'false' Or '$(RuleSetFileForBuild)' == '' ">
diff --git a/sdk/src/Services/ServiceDiscovery/AWSSDK.ServiceDiscovery.NetStandard.csproj b/sdk/src/Services/ServiceDiscovery/AWSSDK.ServiceDiscovery.NetStandard.csproj
index 56322ef5f8ae..1ef1fd4e5359 100644
--- a/sdk/src/Services/ServiceDiscovery/AWSSDK.ServiceDiscovery.NetStandard.csproj
+++ b/sdk/src/Services/ServiceDiscovery/AWSSDK.ServiceDiscovery.NetStandard.csproj
@@ -22,6 +22,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <!-- Async Enumerable Compatibility -->
diff --git a/sdk/src/Services/ServiceDiscovery/Generated/AmazonServiceDiscoveryConfig.cs b/sdk/src/Services/ServiceDiscovery/Generated/AmazonServiceDiscoveryConfig.cs
index 10bdadb126d0..f58903de5ccb 100644
--- a/sdk/src/Services/ServiceDiscovery/Generated/AmazonServiceDiscoveryConfig.cs
+++ b/sdk/src/Services/ServiceDiscovery/Generated/AmazonServiceDiscoveryConfig.cs
@@ -34,7 +34,7 @@ namespace Amazon.ServiceDiscovery
     public partial class AmazonServiceDiscoveryConfig : ClientConfig
     {
         private static readonly string UserAgentString =
-            InternalSDKUtils.BuildUserAgentString("ServiceDiscovery", "3.7.300.84");
+            InternalSDKUtils.BuildUserAgentString("ServiceDiscovery", "4.0.0.0");
 
         private static readonly AmazonServiceDiscoveryEndpointResolver EndpointResolver =
             new AmazonServiceDiscoveryEndpointResolver();
diff --git a/sdk/src/Services/ServiceDiscovery/Properties/AssemblyInfo.cs b/sdk/src/Services/ServiceDiscovery/Properties/AssemblyInfo.cs
index e1859df33672..0cc5c696659b 100644
--- a/sdk/src/Services/ServiceDiscovery/Properties/AssemblyInfo.cs
+++ b/sdk/src/Services/ServiceDiscovery/Properties/AssemblyInfo.cs
@@ -41,5 +41,9 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.300.84")]
\ No newline at end of file
+#if BCL
+[assembly: AssemblyVersion("4.0")]
+#else
+[assembly: AssemblyVersion("4.0.0.0")]
+#endif
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/src/Services/ServiceQuotas/AWSSDK.ServiceQuotas.NetFramework.csproj b/sdk/src/Services/ServiceQuotas/AWSSDK.ServiceQuotas.NetFramework.csproj
index c64de297a923..2741c24927aa 100644
--- a/sdk/src/Services/ServiceQuotas/AWSSDK.ServiceQuotas.NetFramework.csproj
+++ b/sdk/src/Services/ServiceQuotas/AWSSDK.ServiceQuotas.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);BCL;AWS_ASYNC_API;CODE_ANALYSIS</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(RuleSetFileForBuild)' == 'false' Or '$(RuleSetFileForBuild)' == '' ">
diff --git a/sdk/src/Services/ServiceQuotas/AWSSDK.ServiceQuotas.NetStandard.csproj b/sdk/src/Services/ServiceQuotas/AWSSDK.ServiceQuotas.NetStandard.csproj
index 3c4ba472811a..488bfc15ef9a 100644
--- a/sdk/src/Services/ServiceQuotas/AWSSDK.ServiceQuotas.NetStandard.csproj
+++ b/sdk/src/Services/ServiceQuotas/AWSSDK.ServiceQuotas.NetStandard.csproj
@@ -22,6 +22,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <!-- Async Enumerable Compatibility -->
diff --git a/sdk/src/Services/ServiceQuotas/Generated/AmazonServiceQuotasConfig.cs b/sdk/src/Services/ServiceQuotas/Generated/AmazonServiceQuotasConfig.cs
index fa4776ae759a..5cdccd888b91 100644
--- a/sdk/src/Services/ServiceQuotas/Generated/AmazonServiceQuotasConfig.cs
+++ b/sdk/src/Services/ServiceQuotas/Generated/AmazonServiceQuotasConfig.cs
@@ -34,7 +34,7 @@ namespace Amazon.ServiceQuotas
     public partial class AmazonServiceQuotasConfig : ClientConfig
     {
         private static readonly string UserAgentString =
-            InternalSDKUtils.BuildUserAgentString("Service Quotas", "3.7.300.84");
+            InternalSDKUtils.BuildUserAgentString("Service Quotas", "4.0.0.0");
 
         private static readonly AmazonServiceQuotasEndpointResolver EndpointResolver =
             new AmazonServiceQuotasEndpointResolver();
diff --git a/sdk/src/Services/ServiceQuotas/Properties/AssemblyInfo.cs b/sdk/src/Services/ServiceQuotas/Properties/AssemblyInfo.cs
index 6810ae6d4c27..74de859c7f7d 100644
--- a/sdk/src/Services/ServiceQuotas/Properties/AssemblyInfo.cs
+++ b/sdk/src/Services/ServiceQuotas/Properties/AssemblyInfo.cs
@@ -41,5 +41,9 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.300.84")]
\ No newline at end of file
+#if BCL
+[assembly: AssemblyVersion("4.0")]
+#else
+[assembly: AssemblyVersion("4.0.0.0")]
+#endif
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/src/Services/Shield/AWSSDK.Shield.NetFramework.csproj b/sdk/src/Services/Shield/AWSSDK.Shield.NetFramework.csproj
index 67f159e53a9e..e8d25b244730 100644
--- a/sdk/src/Services/Shield/AWSSDK.Shield.NetFramework.csproj
+++ b/sdk/src/Services/Shield/AWSSDK.Shield.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);BCL;AWS_ASYNC_API;CODE_ANALYSIS</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(RuleSetFileForBuild)' == 'false' Or '$(RuleSetFileForBuild)' == '' ">
diff --git a/sdk/src/Services/Shield/AWSSDK.Shield.NetStandard.csproj b/sdk/src/Services/Shield/AWSSDK.Shield.NetStandard.csproj
index 0d4a80f23283..f9371df49160 100644
--- a/sdk/src/Services/Shield/AWSSDK.Shield.NetStandard.csproj
+++ b/sdk/src/Services/Shield/AWSSDK.Shield.NetStandard.csproj
@@ -22,6 +22,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <!-- Async Enumerable Compatibility -->
diff --git a/sdk/src/Services/Shield/Generated/AmazonShieldConfig.cs b/sdk/src/Services/Shield/Generated/AmazonShieldConfig.cs
index b8572fffd902..34279717b928 100644
--- a/sdk/src/Services/Shield/Generated/AmazonShieldConfig.cs
+++ b/sdk/src/Services/Shield/Generated/AmazonShieldConfig.cs
@@ -34,7 +34,7 @@ namespace Amazon.Shield
     public partial class AmazonShieldConfig : ClientConfig
     {
         private static readonly string UserAgentString =
-            InternalSDKUtils.BuildUserAgentString("Shield", "3.7.300.84");
+            InternalSDKUtils.BuildUserAgentString("Shield", "4.0.0.0");
 
         private static readonly AmazonShieldEndpointResolver EndpointResolver =
             new AmazonShieldEndpointResolver();
diff --git a/sdk/src/Services/Shield/Properties/AssemblyInfo.cs b/sdk/src/Services/Shield/Properties/AssemblyInfo.cs
index b0f470d7e0b8..65aa5386835b 100644
--- a/sdk/src/Services/Shield/Properties/AssemblyInfo.cs
+++ b/sdk/src/Services/Shield/Properties/AssemblyInfo.cs
@@ -41,5 +41,9 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.300.84")]
\ No newline at end of file
+#if BCL
+[assembly: AssemblyVersion("4.0")]
+#else
+[assembly: AssemblyVersion("4.0.0.0")]
+#endif
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/src/Services/Signer/AWSSDK.Signer.NetFramework.csproj b/sdk/src/Services/Signer/AWSSDK.Signer.NetFramework.csproj
index c16f1f43f563..b864f811eada 100644
--- a/sdk/src/Services/Signer/AWSSDK.Signer.NetFramework.csproj
+++ b/sdk/src/Services/Signer/AWSSDK.Signer.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);BCL;AWS_ASYNC_API;CODE_ANALYSIS</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(RuleSetFileForBuild)' == 'false' Or '$(RuleSetFileForBuild)' == '' ">
diff --git a/sdk/src/Services/Signer/AWSSDK.Signer.NetStandard.csproj b/sdk/src/Services/Signer/AWSSDK.Signer.NetStandard.csproj
index 49383a05bcc0..7f126a71f8df 100644
--- a/sdk/src/Services/Signer/AWSSDK.Signer.NetStandard.csproj
+++ b/sdk/src/Services/Signer/AWSSDK.Signer.NetStandard.csproj
@@ -22,6 +22,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <!-- Async Enumerable Compatibility -->
diff --git a/sdk/src/Services/Signer/Generated/AmazonSignerConfig.cs b/sdk/src/Services/Signer/Generated/AmazonSignerConfig.cs
index f6c2e34c612a..9e8faee5b255 100644
--- a/sdk/src/Services/Signer/Generated/AmazonSignerConfig.cs
+++ b/sdk/src/Services/Signer/Generated/AmazonSignerConfig.cs
@@ -34,7 +34,7 @@ namespace Amazon.Signer
     public partial class AmazonSignerConfig : ClientConfig
     {
         private static readonly string UserAgentString =
-            InternalSDKUtils.BuildUserAgentString("signer", "3.7.300.85");
+            InternalSDKUtils.BuildUserAgentString("signer", "4.0.0.0");
 
         private static readonly AmazonSignerEndpointResolver EndpointResolver =
             new AmazonSignerEndpointResolver();
diff --git a/sdk/src/Services/Signer/Properties/AssemblyInfo.cs b/sdk/src/Services/Signer/Properties/AssemblyInfo.cs
index 33b24b942e00..0f85bfc18ad6 100644
--- a/sdk/src/Services/Signer/Properties/AssemblyInfo.cs
+++ b/sdk/src/Services/Signer/Properties/AssemblyInfo.cs
@@ -41,5 +41,9 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.300.85")]
\ No newline at end of file
+#if BCL
+[assembly: AssemblyVersion("4.0")]
+#else
+[assembly: AssemblyVersion("4.0.0.0")]
+#endif
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/src/Services/SimSpaceWeaver/AWSSDK.SimSpaceWeaver.NetFramework.csproj b/sdk/src/Services/SimSpaceWeaver/AWSSDK.SimSpaceWeaver.NetFramework.csproj
index 8384a0f99f59..ef4cf142347e 100644
--- a/sdk/src/Services/SimSpaceWeaver/AWSSDK.SimSpaceWeaver.NetFramework.csproj
+++ b/sdk/src/Services/SimSpaceWeaver/AWSSDK.SimSpaceWeaver.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);BCL;AWS_ASYNC_API;CODE_ANALYSIS</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(RuleSetFileForBuild)' == 'false' Or '$(RuleSetFileForBuild)' == '' ">
diff --git a/sdk/src/Services/SimSpaceWeaver/AWSSDK.SimSpaceWeaver.NetStandard.csproj b/sdk/src/Services/SimSpaceWeaver/AWSSDK.SimSpaceWeaver.NetStandard.csproj
index 701f59291fdb..f54c685c93f1 100644
--- a/sdk/src/Services/SimSpaceWeaver/AWSSDK.SimSpaceWeaver.NetStandard.csproj
+++ b/sdk/src/Services/SimSpaceWeaver/AWSSDK.SimSpaceWeaver.NetStandard.csproj
@@ -22,6 +22,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <!-- Async Enumerable Compatibility -->
diff --git a/sdk/src/Services/SimSpaceWeaver/Generated/AmazonSimSpaceWeaverConfig.cs b/sdk/src/Services/SimSpaceWeaver/Generated/AmazonSimSpaceWeaverConfig.cs
index 13f039718514..4cddc5757f39 100644
--- a/sdk/src/Services/SimSpaceWeaver/Generated/AmazonSimSpaceWeaverConfig.cs
+++ b/sdk/src/Services/SimSpaceWeaver/Generated/AmazonSimSpaceWeaverConfig.cs
@@ -34,7 +34,7 @@ namespace Amazon.SimSpaceWeaver
     public partial class AmazonSimSpaceWeaverConfig : ClientConfig
     {
         private static readonly string UserAgentString =
-            InternalSDKUtils.BuildUserAgentString("SimSpaceWeaver", "3.7.300.84");
+            InternalSDKUtils.BuildUserAgentString("SimSpaceWeaver", "4.0.0.0");
 
         private static readonly AmazonSimSpaceWeaverEndpointResolver EndpointResolver =
             new AmazonSimSpaceWeaverEndpointResolver();
diff --git a/sdk/src/Services/SimSpaceWeaver/Properties/AssemblyInfo.cs b/sdk/src/Services/SimSpaceWeaver/Properties/AssemblyInfo.cs
index c7eeda3dd5f3..94fe75b3793f 100644
--- a/sdk/src/Services/SimSpaceWeaver/Properties/AssemblyInfo.cs
+++ b/sdk/src/Services/SimSpaceWeaver/Properties/AssemblyInfo.cs
@@ -41,5 +41,9 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.300.84")]
\ No newline at end of file
+#if BCL
+[assembly: AssemblyVersion("4.0")]
+#else
+[assembly: AssemblyVersion("4.0.0.0")]
+#endif
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/src/Services/SimpleDB/AWSSDK.SimpleDB.NetFramework.csproj b/sdk/src/Services/SimpleDB/AWSSDK.SimpleDB.NetFramework.csproj
index 2c6f6aec9159..e1a2db246ec9 100644
--- a/sdk/src/Services/SimpleDB/AWSSDK.SimpleDB.NetFramework.csproj
+++ b/sdk/src/Services/SimpleDB/AWSSDK.SimpleDB.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);BCL;AWS_ASYNC_API;CODE_ANALYSIS</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(RuleSetFileForBuild)' == 'false' Or '$(RuleSetFileForBuild)' == '' ">
diff --git a/sdk/src/Services/SimpleDB/AWSSDK.SimpleDB.NetStandard.csproj b/sdk/src/Services/SimpleDB/AWSSDK.SimpleDB.NetStandard.csproj
index 9920ed8b1cb7..3cb9843104a5 100644
--- a/sdk/src/Services/SimpleDB/AWSSDK.SimpleDB.NetStandard.csproj
+++ b/sdk/src/Services/SimpleDB/AWSSDK.SimpleDB.NetStandard.csproj
@@ -22,6 +22,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <!-- Async Enumerable Compatibility -->
diff --git a/sdk/src/Services/SimpleDB/Generated/AmazonSimpleDBConfig.cs b/sdk/src/Services/SimpleDB/Generated/AmazonSimpleDBConfig.cs
index 59188450cf49..48b81f82ad36 100644
--- a/sdk/src/Services/SimpleDB/Generated/AmazonSimpleDBConfig.cs
+++ b/sdk/src/Services/SimpleDB/Generated/AmazonSimpleDBConfig.cs
@@ -34,7 +34,7 @@ namespace Amazon.SimpleDB
     public partial class AmazonSimpleDBConfig : ClientConfig
     {
         private static readonly string UserAgentString =
-            InternalSDKUtils.BuildUserAgentString("SimpleDB", "3.7.300.84");
+            InternalSDKUtils.BuildUserAgentString("SimpleDB", "4.0.0.0");
 
         private static readonly AmazonSimpleDBEndpointResolver EndpointResolver =
             new AmazonSimpleDBEndpointResolver();
diff --git a/sdk/src/Services/SimpleDB/Properties/AssemblyInfo.cs b/sdk/src/Services/SimpleDB/Properties/AssemblyInfo.cs
index 26122f7f8e39..3e8a976acb7a 100644
--- a/sdk/src/Services/SimpleDB/Properties/AssemblyInfo.cs
+++ b/sdk/src/Services/SimpleDB/Properties/AssemblyInfo.cs
@@ -41,5 +41,9 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.300.84")]
\ No newline at end of file
+#if BCL
+[assembly: AssemblyVersion("4.0")]
+#else
+[assembly: AssemblyVersion("4.0.0.0")]
+#endif
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/src/Services/SimpleEmail/AWSSDK.SimpleEmail.NetFramework.csproj b/sdk/src/Services/SimpleEmail/AWSSDK.SimpleEmail.NetFramework.csproj
index 8b417769d92f..8ae9ed0be84c 100644
--- a/sdk/src/Services/SimpleEmail/AWSSDK.SimpleEmail.NetFramework.csproj
+++ b/sdk/src/Services/SimpleEmail/AWSSDK.SimpleEmail.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);BCL;AWS_ASYNC_API;CODE_ANALYSIS</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(RuleSetFileForBuild)' == 'false' Or '$(RuleSetFileForBuild)' == '' ">
diff --git a/sdk/src/Services/SimpleEmail/AWSSDK.SimpleEmail.NetStandard.csproj b/sdk/src/Services/SimpleEmail/AWSSDK.SimpleEmail.NetStandard.csproj
index 3adeb69efe7e..ef1abc414f80 100644
--- a/sdk/src/Services/SimpleEmail/AWSSDK.SimpleEmail.NetStandard.csproj
+++ b/sdk/src/Services/SimpleEmail/AWSSDK.SimpleEmail.NetStandard.csproj
@@ -22,6 +22,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <!-- Async Enumerable Compatibility -->
diff --git a/sdk/src/Services/SimpleEmail/Generated/AmazonSimpleEmailServiceConfig.cs b/sdk/src/Services/SimpleEmail/Generated/AmazonSimpleEmailServiceConfig.cs
index 7f38d3f2f4b1..c5ee1d592cd7 100644
--- a/sdk/src/Services/SimpleEmail/Generated/AmazonSimpleEmailServiceConfig.cs
+++ b/sdk/src/Services/SimpleEmail/Generated/AmazonSimpleEmailServiceConfig.cs
@@ -34,7 +34,7 @@ namespace Amazon.SimpleEmail
     public partial class AmazonSimpleEmailServiceConfig : ClientConfig
     {
         private static readonly string UserAgentString =
-            InternalSDKUtils.BuildUserAgentString("SES", "3.7.300.84");
+            InternalSDKUtils.BuildUserAgentString("SES", "4.0.0.0");
 
         private static readonly AmazonSimpleEmailServiceEndpointResolver EndpointResolver =
             new AmazonSimpleEmailServiceEndpointResolver();
diff --git a/sdk/src/Services/SimpleEmail/Properties/AssemblyInfo.cs b/sdk/src/Services/SimpleEmail/Properties/AssemblyInfo.cs
index a2f45d39d067..01fac1a7ef19 100644
--- a/sdk/src/Services/SimpleEmail/Properties/AssemblyInfo.cs
+++ b/sdk/src/Services/SimpleEmail/Properties/AssemblyInfo.cs
@@ -41,5 +41,9 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.300.84")]
\ No newline at end of file
+#if BCL
+[assembly: AssemblyVersion("4.0")]
+#else
+[assembly: AssemblyVersion("4.0.0.0")]
+#endif
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/src/Services/SimpleEmailV2/AWSSDK.SimpleEmailV2.NetFramework.csproj b/sdk/src/Services/SimpleEmailV2/AWSSDK.SimpleEmailV2.NetFramework.csproj
index d03271fe68dd..d55f94a319de 100644
--- a/sdk/src/Services/SimpleEmailV2/AWSSDK.SimpleEmailV2.NetFramework.csproj
+++ b/sdk/src/Services/SimpleEmailV2/AWSSDK.SimpleEmailV2.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);BCL;AWS_ASYNC_API;CODE_ANALYSIS</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(RuleSetFileForBuild)' == 'false' Or '$(RuleSetFileForBuild)' == '' ">
diff --git a/sdk/src/Services/SimpleEmailV2/AWSSDK.SimpleEmailV2.NetStandard.csproj b/sdk/src/Services/SimpleEmailV2/AWSSDK.SimpleEmailV2.NetStandard.csproj
index eb7b1159bff5..f3d682f72019 100644
--- a/sdk/src/Services/SimpleEmailV2/AWSSDK.SimpleEmailV2.NetStandard.csproj
+++ b/sdk/src/Services/SimpleEmailV2/AWSSDK.SimpleEmailV2.NetStandard.csproj
@@ -22,6 +22,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <!-- Async Enumerable Compatibility -->
diff --git a/sdk/src/Services/SimpleEmailV2/Generated/AmazonSimpleEmailServiceV2Config.cs b/sdk/src/Services/SimpleEmailV2/Generated/AmazonSimpleEmailServiceV2Config.cs
index 46fff67ee72a..ad260293ce9f 100644
--- a/sdk/src/Services/SimpleEmailV2/Generated/AmazonSimpleEmailServiceV2Config.cs
+++ b/sdk/src/Services/SimpleEmailV2/Generated/AmazonSimpleEmailServiceV2Config.cs
@@ -34,7 +34,7 @@ namespace Amazon.SimpleEmailV2
     public partial class AmazonSimpleEmailServiceV2Config : ClientConfig
     {
         private static readonly string UserAgentString =
-            InternalSDKUtils.BuildUserAgentString("SESv2", "3.7.301.30");
+            InternalSDKUtils.BuildUserAgentString("SESv2", "4.0.0.0");
 
         private static readonly AmazonSimpleEmailServiceV2EndpointResolver EndpointResolver =
             new AmazonSimpleEmailServiceV2EndpointResolver();
diff --git a/sdk/src/Services/SimpleEmailV2/Properties/AssemblyInfo.cs b/sdk/src/Services/SimpleEmailV2/Properties/AssemblyInfo.cs
index 0cea7075d3c7..70a563c0c7f9 100644
--- a/sdk/src/Services/SimpleEmailV2/Properties/AssemblyInfo.cs
+++ b/sdk/src/Services/SimpleEmailV2/Properties/AssemblyInfo.cs
@@ -41,5 +41,9 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.301.30")]
\ No newline at end of file
+#if BCL
+[assembly: AssemblyVersion("4.0")]
+#else
+[assembly: AssemblyVersion("4.0.0.0")]
+#endif
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/src/Services/SimpleNotificationService/AWSSDK.SimpleNotificationService.NetFramework.csproj b/sdk/src/Services/SimpleNotificationService/AWSSDK.SimpleNotificationService.NetFramework.csproj
index c9ededed2a3f..be9e61d0cad0 100644
--- a/sdk/src/Services/SimpleNotificationService/AWSSDK.SimpleNotificationService.NetFramework.csproj
+++ b/sdk/src/Services/SimpleNotificationService/AWSSDK.SimpleNotificationService.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);BCL;AWS_ASYNC_API;CODE_ANALYSIS</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(RuleSetFileForBuild)' == 'false' Or '$(RuleSetFileForBuild)' == '' ">
diff --git a/sdk/src/Services/SimpleNotificationService/AWSSDK.SimpleNotificationService.NetStandard.csproj b/sdk/src/Services/SimpleNotificationService/AWSSDK.SimpleNotificationService.NetStandard.csproj
index 02cc08da6dac..89ff61931c05 100644
--- a/sdk/src/Services/SimpleNotificationService/AWSSDK.SimpleNotificationService.NetStandard.csproj
+++ b/sdk/src/Services/SimpleNotificationService/AWSSDK.SimpleNotificationService.NetStandard.csproj
@@ -22,6 +22,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <!-- Async Enumerable Compatibility -->
diff --git a/sdk/src/Services/SimpleNotificationService/Generated/AmazonSimpleNotificationServiceConfig.cs b/sdk/src/Services/SimpleNotificationService/Generated/AmazonSimpleNotificationServiceConfig.cs
index 50a4c2711a6f..1f5cce80b876 100644
--- a/sdk/src/Services/SimpleNotificationService/Generated/AmazonSimpleNotificationServiceConfig.cs
+++ b/sdk/src/Services/SimpleNotificationService/Generated/AmazonSimpleNotificationServiceConfig.cs
@@ -34,7 +34,7 @@ namespace Amazon.SimpleNotificationService
     public partial class AmazonSimpleNotificationServiceConfig : ClientConfig
     {
         private static readonly string UserAgentString =
-            InternalSDKUtils.BuildUserAgentString("SNS", "3.7.301.32");
+            InternalSDKUtils.BuildUserAgentString("SNS", "4.0.0.0");
 
         private static readonly AmazonSimpleNotificationServiceEndpointResolver EndpointResolver =
             new AmazonSimpleNotificationServiceEndpointResolver();
diff --git a/sdk/src/Services/SimpleNotificationService/Properties/AssemblyInfo.cs b/sdk/src/Services/SimpleNotificationService/Properties/AssemblyInfo.cs
index 72ec01e2dcae..734e56b8df7d 100644
--- a/sdk/src/Services/SimpleNotificationService/Properties/AssemblyInfo.cs
+++ b/sdk/src/Services/SimpleNotificationService/Properties/AssemblyInfo.cs
@@ -41,5 +41,9 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.301.32")]
\ No newline at end of file
+#if BCL
+[assembly: AssemblyVersion("4.0")]
+#else
+[assembly: AssemblyVersion("4.0.0.0")]
+#endif
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/src/Services/SimpleSystemsManagement/AWSSDK.SimpleSystemsManagement.NetFramework.csproj b/sdk/src/Services/SimpleSystemsManagement/AWSSDK.SimpleSystemsManagement.NetFramework.csproj
index f9731a0d32cb..36fda9c58b85 100644
--- a/sdk/src/Services/SimpleSystemsManagement/AWSSDK.SimpleSystemsManagement.NetFramework.csproj
+++ b/sdk/src/Services/SimpleSystemsManagement/AWSSDK.SimpleSystemsManagement.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);BCL;AWS_ASYNC_API;CODE_ANALYSIS</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(RuleSetFileForBuild)' == 'false' Or '$(RuleSetFileForBuild)' == '' ">
diff --git a/sdk/src/Services/SimpleSystemsManagement/AWSSDK.SimpleSystemsManagement.NetStandard.csproj b/sdk/src/Services/SimpleSystemsManagement/AWSSDK.SimpleSystemsManagement.NetStandard.csproj
index 889ce396a422..461198f1cd08 100644
--- a/sdk/src/Services/SimpleSystemsManagement/AWSSDK.SimpleSystemsManagement.NetStandard.csproj
+++ b/sdk/src/Services/SimpleSystemsManagement/AWSSDK.SimpleSystemsManagement.NetStandard.csproj
@@ -22,6 +22,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <!-- Async Enumerable Compatibility -->
diff --git a/sdk/src/Services/SimpleSystemsManagement/Generated/AmazonSimpleSystemsManagementConfig.cs b/sdk/src/Services/SimpleSystemsManagement/Generated/AmazonSimpleSystemsManagementConfig.cs
index 43e8821dec96..ca58f9fad2ac 100644
--- a/sdk/src/Services/SimpleSystemsManagement/Generated/AmazonSimpleSystemsManagementConfig.cs
+++ b/sdk/src/Services/SimpleSystemsManagement/Generated/AmazonSimpleSystemsManagementConfig.cs
@@ -34,7 +34,7 @@ namespace Amazon.SimpleSystemsManagement
     public partial class AmazonSimpleSystemsManagementConfig : ClientConfig
     {
         private static readonly string UserAgentString =
-            InternalSDKUtils.BuildUserAgentString("SSM", "3.7.304.3");
+            InternalSDKUtils.BuildUserAgentString("SSM", "4.0.0.0");
 
         private static readonly AmazonSimpleSystemsManagementEndpointResolver EndpointResolver =
             new AmazonSimpleSystemsManagementEndpointResolver();
diff --git a/sdk/src/Services/SimpleSystemsManagement/Properties/AssemblyInfo.cs b/sdk/src/Services/SimpleSystemsManagement/Properties/AssemblyInfo.cs
index 06de07766bd0..26c02c57df23 100644
--- a/sdk/src/Services/SimpleSystemsManagement/Properties/AssemblyInfo.cs
+++ b/sdk/src/Services/SimpleSystemsManagement/Properties/AssemblyInfo.cs
@@ -41,5 +41,9 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.304.3")]
\ No newline at end of file
+#if BCL
+[assembly: AssemblyVersion("4.0")]
+#else
+[assembly: AssemblyVersion("4.0.0.0")]
+#endif
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/src/Services/SimpleWorkflow/AWSSDK.SimpleWorkflow.NetFramework.csproj b/sdk/src/Services/SimpleWorkflow/AWSSDK.SimpleWorkflow.NetFramework.csproj
index 9b3c8a10969f..574f411e6b35 100644
--- a/sdk/src/Services/SimpleWorkflow/AWSSDK.SimpleWorkflow.NetFramework.csproj
+++ b/sdk/src/Services/SimpleWorkflow/AWSSDK.SimpleWorkflow.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);BCL;AWS_ASYNC_API;CODE_ANALYSIS</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(RuleSetFileForBuild)' == 'false' Or '$(RuleSetFileForBuild)' == '' ">
diff --git a/sdk/src/Services/SimpleWorkflow/AWSSDK.SimpleWorkflow.NetStandard.csproj b/sdk/src/Services/SimpleWorkflow/AWSSDK.SimpleWorkflow.NetStandard.csproj
index 4f86317af1c2..39d9cc27f414 100644
--- a/sdk/src/Services/SimpleWorkflow/AWSSDK.SimpleWorkflow.NetStandard.csproj
+++ b/sdk/src/Services/SimpleWorkflow/AWSSDK.SimpleWorkflow.NetStandard.csproj
@@ -22,6 +22,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <!-- Async Enumerable Compatibility -->
diff --git a/sdk/src/Services/SimpleWorkflow/Generated/AmazonSimpleWorkflowConfig.cs b/sdk/src/Services/SimpleWorkflow/Generated/AmazonSimpleWorkflowConfig.cs
index d091ea70ec5f..e34dbc6c72de 100644
--- a/sdk/src/Services/SimpleWorkflow/Generated/AmazonSimpleWorkflowConfig.cs
+++ b/sdk/src/Services/SimpleWorkflow/Generated/AmazonSimpleWorkflowConfig.cs
@@ -34,7 +34,7 @@ namespace Amazon.SimpleWorkflow
     public partial class AmazonSimpleWorkflowConfig : ClientConfig
     {
         private static readonly string UserAgentString =
-            InternalSDKUtils.BuildUserAgentString("SWF", "3.7.300.84");
+            InternalSDKUtils.BuildUserAgentString("SWF", "4.0.0.0");
 
         private static readonly AmazonSimpleWorkflowEndpointResolver EndpointResolver =
             new AmazonSimpleWorkflowEndpointResolver();
diff --git a/sdk/src/Services/SimpleWorkflow/Properties/AssemblyInfo.cs b/sdk/src/Services/SimpleWorkflow/Properties/AssemblyInfo.cs
index d24e7ee81b35..dfe2ef4f727b 100644
--- a/sdk/src/Services/SimpleWorkflow/Properties/AssemblyInfo.cs
+++ b/sdk/src/Services/SimpleWorkflow/Properties/AssemblyInfo.cs
@@ -41,5 +41,9 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.300.84")]
\ No newline at end of file
+#if BCL
+[assembly: AssemblyVersion("4.0")]
+#else
+[assembly: AssemblyVersion("4.0.0.0")]
+#endif
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/src/Services/SnowDeviceManagement/AWSSDK.SnowDeviceManagement.NetFramework.csproj b/sdk/src/Services/SnowDeviceManagement/AWSSDK.SnowDeviceManagement.NetFramework.csproj
index 173d15a0cf4a..c768f7e2556a 100644
--- a/sdk/src/Services/SnowDeviceManagement/AWSSDK.SnowDeviceManagement.NetFramework.csproj
+++ b/sdk/src/Services/SnowDeviceManagement/AWSSDK.SnowDeviceManagement.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);BCL;AWS_ASYNC_API;CODE_ANALYSIS</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(RuleSetFileForBuild)' == 'false' Or '$(RuleSetFileForBuild)' == '' ">
diff --git a/sdk/src/Services/SnowDeviceManagement/AWSSDK.SnowDeviceManagement.NetStandard.csproj b/sdk/src/Services/SnowDeviceManagement/AWSSDK.SnowDeviceManagement.NetStandard.csproj
index 16f9a7170c94..895c2075ddc6 100644
--- a/sdk/src/Services/SnowDeviceManagement/AWSSDK.SnowDeviceManagement.NetStandard.csproj
+++ b/sdk/src/Services/SnowDeviceManagement/AWSSDK.SnowDeviceManagement.NetStandard.csproj
@@ -22,6 +22,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <!-- Async Enumerable Compatibility -->
diff --git a/sdk/src/Services/SnowDeviceManagement/Generated/AmazonSnowDeviceManagementConfig.cs b/sdk/src/Services/SnowDeviceManagement/Generated/AmazonSnowDeviceManagementConfig.cs
index 5d5665409136..586adc231c5e 100644
--- a/sdk/src/Services/SnowDeviceManagement/Generated/AmazonSnowDeviceManagementConfig.cs
+++ b/sdk/src/Services/SnowDeviceManagement/Generated/AmazonSnowDeviceManagementConfig.cs
@@ -34,7 +34,7 @@ namespace Amazon.SnowDeviceManagement
     public partial class AmazonSnowDeviceManagementConfig : ClientConfig
     {
         private static readonly string UserAgentString =
-            InternalSDKUtils.BuildUserAgentString("Snow Device Management", "3.7.300.84");
+            InternalSDKUtils.BuildUserAgentString("Snow Device Management", "4.0.0.0");
 
         private static readonly AmazonSnowDeviceManagementEndpointResolver EndpointResolver =
             new AmazonSnowDeviceManagementEndpointResolver();
diff --git a/sdk/src/Services/SnowDeviceManagement/Properties/AssemblyInfo.cs b/sdk/src/Services/SnowDeviceManagement/Properties/AssemblyInfo.cs
index b8963070b0f6..a7195a5f55d5 100644
--- a/sdk/src/Services/SnowDeviceManagement/Properties/AssemblyInfo.cs
+++ b/sdk/src/Services/SnowDeviceManagement/Properties/AssemblyInfo.cs
@@ -41,5 +41,9 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.300.84")]
\ No newline at end of file
+#if BCL
+[assembly: AssemblyVersion("4.0")]
+#else
+[assembly: AssemblyVersion("4.0.0.0")]
+#endif
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/src/Services/Snowball/AWSSDK.Snowball.NetFramework.csproj b/sdk/src/Services/Snowball/AWSSDK.Snowball.NetFramework.csproj
index 195d3949da78..f33b6759e9ca 100644
--- a/sdk/src/Services/Snowball/AWSSDK.Snowball.NetFramework.csproj
+++ b/sdk/src/Services/Snowball/AWSSDK.Snowball.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);BCL;AWS_ASYNC_API;CODE_ANALYSIS</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(RuleSetFileForBuild)' == 'false' Or '$(RuleSetFileForBuild)' == '' ">
diff --git a/sdk/src/Services/Snowball/AWSSDK.Snowball.NetStandard.csproj b/sdk/src/Services/Snowball/AWSSDK.Snowball.NetStandard.csproj
index d3b9d9184a9e..986483a9cebe 100644
--- a/sdk/src/Services/Snowball/AWSSDK.Snowball.NetStandard.csproj
+++ b/sdk/src/Services/Snowball/AWSSDK.Snowball.NetStandard.csproj
@@ -22,6 +22,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <!-- Async Enumerable Compatibility -->
diff --git a/sdk/src/Services/Snowball/Generated/AmazonSnowballConfig.cs b/sdk/src/Services/Snowball/Generated/AmazonSnowballConfig.cs
index 4570a0230078..f7f9c0606d2f 100644
--- a/sdk/src/Services/Snowball/Generated/AmazonSnowballConfig.cs
+++ b/sdk/src/Services/Snowball/Generated/AmazonSnowballConfig.cs
@@ -34,7 +34,7 @@ namespace Amazon.Snowball
     public partial class AmazonSnowballConfig : ClientConfig
     {
         private static readonly string UserAgentString =
-            InternalSDKUtils.BuildUserAgentString("Snowball", "3.7.300.85");
+            InternalSDKUtils.BuildUserAgentString("Snowball", "4.0.0.0");
 
         private static readonly AmazonSnowballEndpointResolver EndpointResolver =
             new AmazonSnowballEndpointResolver();
diff --git a/sdk/src/Services/Snowball/Properties/AssemblyInfo.cs b/sdk/src/Services/Snowball/Properties/AssemblyInfo.cs
index 7677b82ab2ec..1a62b4d3c889 100644
--- a/sdk/src/Services/Snowball/Properties/AssemblyInfo.cs
+++ b/sdk/src/Services/Snowball/Properties/AssemblyInfo.cs
@@ -41,5 +41,9 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.300.85")]
\ No newline at end of file
+#if BCL
+[assembly: AssemblyVersion("4.0")]
+#else
+[assembly: AssemblyVersion("4.0.0.0")]
+#endif
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/src/Services/SsmSap/AWSSDK.SsmSap.NetFramework.csproj b/sdk/src/Services/SsmSap/AWSSDK.SsmSap.NetFramework.csproj
index 750fb1cd94b9..c0d67a33a075 100644
--- a/sdk/src/Services/SsmSap/AWSSDK.SsmSap.NetFramework.csproj
+++ b/sdk/src/Services/SsmSap/AWSSDK.SsmSap.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);BCL;AWS_ASYNC_API;CODE_ANALYSIS</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(RuleSetFileForBuild)' == 'false' Or '$(RuleSetFileForBuild)' == '' ">
diff --git a/sdk/src/Services/SsmSap/AWSSDK.SsmSap.NetStandard.csproj b/sdk/src/Services/SsmSap/AWSSDK.SsmSap.NetStandard.csproj
index 064e84bdc80c..3ca526bbd058 100644
--- a/sdk/src/Services/SsmSap/AWSSDK.SsmSap.NetStandard.csproj
+++ b/sdk/src/Services/SsmSap/AWSSDK.SsmSap.NetStandard.csproj
@@ -22,6 +22,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <!-- Async Enumerable Compatibility -->
diff --git a/sdk/src/Services/SsmSap/Generated/AmazonSsmSapConfig.cs b/sdk/src/Services/SsmSap/Generated/AmazonSsmSapConfig.cs
index a4bc8c7e10f7..975f21cc3c2d 100644
--- a/sdk/src/Services/SsmSap/Generated/AmazonSsmSapConfig.cs
+++ b/sdk/src/Services/SsmSap/Generated/AmazonSsmSapConfig.cs
@@ -34,7 +34,7 @@ namespace Amazon.SsmSap
     public partial class AmazonSsmSapConfig : ClientConfig
     {
         private static readonly string UserAgentString =
-            InternalSDKUtils.BuildUserAgentString("Ssm Sap", "3.7.301.81");
+            InternalSDKUtils.BuildUserAgentString("Ssm Sap", "4.0.0.0");
 
         private static readonly AmazonSsmSapEndpointResolver EndpointResolver =
             new AmazonSsmSapEndpointResolver();
diff --git a/sdk/src/Services/SsmSap/Properties/AssemblyInfo.cs b/sdk/src/Services/SsmSap/Properties/AssemblyInfo.cs
index 1c0343025fe5..7d1c129dbb60 100644
--- a/sdk/src/Services/SsmSap/Properties/AssemblyInfo.cs
+++ b/sdk/src/Services/SsmSap/Properties/AssemblyInfo.cs
@@ -41,5 +41,9 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.301.81")]
\ No newline at end of file
+#if BCL
+[assembly: AssemblyVersion("4.0")]
+#else
+[assembly: AssemblyVersion("4.0.0.0")]
+#endif
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/src/Services/StepFunctions/AWSSDK.StepFunctions.NetFramework.csproj b/sdk/src/Services/StepFunctions/AWSSDK.StepFunctions.NetFramework.csproj
index e017f9adb3d3..d12e5d38eacb 100644
--- a/sdk/src/Services/StepFunctions/AWSSDK.StepFunctions.NetFramework.csproj
+++ b/sdk/src/Services/StepFunctions/AWSSDK.StepFunctions.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);BCL;AWS_ASYNC_API;CODE_ANALYSIS</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(RuleSetFileForBuild)' == 'false' Or '$(RuleSetFileForBuild)' == '' ">
diff --git a/sdk/src/Services/StepFunctions/AWSSDK.StepFunctions.NetStandard.csproj b/sdk/src/Services/StepFunctions/AWSSDK.StepFunctions.NetStandard.csproj
index 84a8167fdc3a..e68105c6ede1 100644
--- a/sdk/src/Services/StepFunctions/AWSSDK.StepFunctions.NetStandard.csproj
+++ b/sdk/src/Services/StepFunctions/AWSSDK.StepFunctions.NetStandard.csproj
@@ -22,6 +22,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <!-- Async Enumerable Compatibility -->
diff --git a/sdk/src/Services/StepFunctions/Generated/AmazonStepFunctionsConfig.cs b/sdk/src/Services/StepFunctions/Generated/AmazonStepFunctionsConfig.cs
index 36eb446bd058..9acfdc91f688 100644
--- a/sdk/src/Services/StepFunctions/Generated/AmazonStepFunctionsConfig.cs
+++ b/sdk/src/Services/StepFunctions/Generated/AmazonStepFunctionsConfig.cs
@@ -34,7 +34,7 @@ namespace Amazon.StepFunctions
     public partial class AmazonStepFunctionsConfig : ClientConfig
     {
         private static readonly string UserAgentString =
-            InternalSDKUtils.BuildUserAgentString("SFN", "3.7.303.2");
+            InternalSDKUtils.BuildUserAgentString("SFN", "4.0.0.0");
 
         private static readonly AmazonStepFunctionsEndpointResolver EndpointResolver =
             new AmazonStepFunctionsEndpointResolver();
diff --git a/sdk/src/Services/StepFunctions/Properties/AssemblyInfo.cs b/sdk/src/Services/StepFunctions/Properties/AssemblyInfo.cs
index 123393648ecf..c0f8ae364738 100644
--- a/sdk/src/Services/StepFunctions/Properties/AssemblyInfo.cs
+++ b/sdk/src/Services/StepFunctions/Properties/AssemblyInfo.cs
@@ -41,5 +41,9 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.303.2")]
\ No newline at end of file
+#if BCL
+[assembly: AssemblyVersion("4.0")]
+#else
+[assembly: AssemblyVersion("4.0.0.0")]
+#endif
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/src/Services/StorageGateway/AWSSDK.StorageGateway.NetFramework.csproj b/sdk/src/Services/StorageGateway/AWSSDK.StorageGateway.NetFramework.csproj
index 91722886c32e..f561516d0d49 100644
--- a/sdk/src/Services/StorageGateway/AWSSDK.StorageGateway.NetFramework.csproj
+++ b/sdk/src/Services/StorageGateway/AWSSDK.StorageGateway.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);BCL;AWS_ASYNC_API;CODE_ANALYSIS</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(RuleSetFileForBuild)' == 'false' Or '$(RuleSetFileForBuild)' == '' ">
diff --git a/sdk/src/Services/StorageGateway/AWSSDK.StorageGateway.NetStandard.csproj b/sdk/src/Services/StorageGateway/AWSSDK.StorageGateway.NetStandard.csproj
index d46268f7421b..e090d6449255 100644
--- a/sdk/src/Services/StorageGateway/AWSSDK.StorageGateway.NetStandard.csproj
+++ b/sdk/src/Services/StorageGateway/AWSSDK.StorageGateway.NetStandard.csproj
@@ -22,6 +22,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <!-- Async Enumerable Compatibility -->
diff --git a/sdk/src/Services/StorageGateway/Generated/AmazonStorageGatewayConfig.cs b/sdk/src/Services/StorageGateway/Generated/AmazonStorageGatewayConfig.cs
index c8d95acf6aa3..e2d1dd362c3d 100644
--- a/sdk/src/Services/StorageGateway/Generated/AmazonStorageGatewayConfig.cs
+++ b/sdk/src/Services/StorageGateway/Generated/AmazonStorageGatewayConfig.cs
@@ -34,7 +34,7 @@ namespace Amazon.StorageGateway
     public partial class AmazonStorageGatewayConfig : ClientConfig
     {
         private static readonly string UserAgentString =
-            InternalSDKUtils.BuildUserAgentString("Storage Gateway", "3.7.301.44");
+            InternalSDKUtils.BuildUserAgentString("Storage Gateway", "4.0.0.0");
 
         private static readonly AmazonStorageGatewayEndpointResolver EndpointResolver =
             new AmazonStorageGatewayEndpointResolver();
diff --git a/sdk/src/Services/StorageGateway/Properties/AssemblyInfo.cs b/sdk/src/Services/StorageGateway/Properties/AssemblyInfo.cs
index e10d9a8adc7c..0b963817527f 100644
--- a/sdk/src/Services/StorageGateway/Properties/AssemblyInfo.cs
+++ b/sdk/src/Services/StorageGateway/Properties/AssemblyInfo.cs
@@ -41,5 +41,9 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.301.44")]
\ No newline at end of file
+#if BCL
+[assembly: AssemblyVersion("4.0")]
+#else
+[assembly: AssemblyVersion("4.0.0.0")]
+#endif
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/src/Services/SupplyChain/AWSSDK.SupplyChain.NetFramework.csproj b/sdk/src/Services/SupplyChain/AWSSDK.SupplyChain.NetFramework.csproj
index 4707049d52cb..f62e48c4f405 100644
--- a/sdk/src/Services/SupplyChain/AWSSDK.SupplyChain.NetFramework.csproj
+++ b/sdk/src/Services/SupplyChain/AWSSDK.SupplyChain.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);BCL;AWS_ASYNC_API;CODE_ANALYSIS</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(RuleSetFileForBuild)' == 'false' Or '$(RuleSetFileForBuild)' == '' ">
diff --git a/sdk/src/Services/SupplyChain/AWSSDK.SupplyChain.NetStandard.csproj b/sdk/src/Services/SupplyChain/AWSSDK.SupplyChain.NetStandard.csproj
index 484929a285ae..b82ef375f133 100644
--- a/sdk/src/Services/SupplyChain/AWSSDK.SupplyChain.NetStandard.csproj
+++ b/sdk/src/Services/SupplyChain/AWSSDK.SupplyChain.NetStandard.csproj
@@ -22,6 +22,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <!-- Async Enumerable Compatibility -->
diff --git a/sdk/src/Services/SupplyChain/Generated/AmazonSupplyChainConfig.cs b/sdk/src/Services/SupplyChain/Generated/AmazonSupplyChainConfig.cs
index b08acc04157a..a0f0315ab374 100644
--- a/sdk/src/Services/SupplyChain/Generated/AmazonSupplyChainConfig.cs
+++ b/sdk/src/Services/SupplyChain/Generated/AmazonSupplyChainConfig.cs
@@ -34,7 +34,7 @@ namespace Amazon.SupplyChain
     public partial class AmazonSupplyChainConfig : ClientConfig
     {
         private static readonly string UserAgentString =
-            InternalSDKUtils.BuildUserAgentString("SupplyChain", "3.7.301.11");
+            InternalSDKUtils.BuildUserAgentString("SupplyChain", "4.0.0.0");
 
         private static readonly AmazonSupplyChainEndpointResolver EndpointResolver =
             new AmazonSupplyChainEndpointResolver();
diff --git a/sdk/src/Services/SupplyChain/Properties/AssemblyInfo.cs b/sdk/src/Services/SupplyChain/Properties/AssemblyInfo.cs
index e04a63b48e8e..88692bdacf96 100644
--- a/sdk/src/Services/SupplyChain/Properties/AssemblyInfo.cs
+++ b/sdk/src/Services/SupplyChain/Properties/AssemblyInfo.cs
@@ -41,5 +41,9 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.301.11")]
\ No newline at end of file
+#if BCL
+[assembly: AssemblyVersion("4.0")]
+#else
+[assembly: AssemblyVersion("4.0.0.0")]
+#endif
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/src/Services/SupportApp/AWSSDK.SupportApp.NetFramework.csproj b/sdk/src/Services/SupportApp/AWSSDK.SupportApp.NetFramework.csproj
index ce63b02c85d5..0e6a3702d611 100644
--- a/sdk/src/Services/SupportApp/AWSSDK.SupportApp.NetFramework.csproj
+++ b/sdk/src/Services/SupportApp/AWSSDK.SupportApp.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);BCL;AWS_ASYNC_API;CODE_ANALYSIS</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(RuleSetFileForBuild)' == 'false' Or '$(RuleSetFileForBuild)' == '' ">
diff --git a/sdk/src/Services/SupportApp/AWSSDK.SupportApp.NetStandard.csproj b/sdk/src/Services/SupportApp/AWSSDK.SupportApp.NetStandard.csproj
index 04c2ab090bc6..e5a8565ca2c5 100644
--- a/sdk/src/Services/SupportApp/AWSSDK.SupportApp.NetStandard.csproj
+++ b/sdk/src/Services/SupportApp/AWSSDK.SupportApp.NetStandard.csproj
@@ -22,6 +22,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <!-- Async Enumerable Compatibility -->
diff --git a/sdk/src/Services/SupportApp/Generated/AmazonSupportAppConfig.cs b/sdk/src/Services/SupportApp/Generated/AmazonSupportAppConfig.cs
index 4c1c3ccf1026..60b0601aed36 100644
--- a/sdk/src/Services/SupportApp/Generated/AmazonSupportAppConfig.cs
+++ b/sdk/src/Services/SupportApp/Generated/AmazonSupportAppConfig.cs
@@ -34,7 +34,7 @@ namespace Amazon.SupportApp
     public partial class AmazonSupportAppConfig : ClientConfig
     {
         private static readonly string UserAgentString =
-            InternalSDKUtils.BuildUserAgentString("Support App", "3.7.300.84");
+            InternalSDKUtils.BuildUserAgentString("Support App", "4.0.0.0");
 
         private static readonly AmazonSupportAppEndpointResolver EndpointResolver =
             new AmazonSupportAppEndpointResolver();
diff --git a/sdk/src/Services/SupportApp/Properties/AssemblyInfo.cs b/sdk/src/Services/SupportApp/Properties/AssemblyInfo.cs
index d4513606e955..c603d810bc06 100644
--- a/sdk/src/Services/SupportApp/Properties/AssemblyInfo.cs
+++ b/sdk/src/Services/SupportApp/Properties/AssemblyInfo.cs
@@ -41,5 +41,9 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.300.84")]
\ No newline at end of file
+#if BCL
+[assembly: AssemblyVersion("4.0")]
+#else
+[assembly: AssemblyVersion("4.0.0.0")]
+#endif
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/src/Services/Synthetics/AWSSDK.Synthetics.NetFramework.csproj b/sdk/src/Services/Synthetics/AWSSDK.Synthetics.NetFramework.csproj
index 9e009ed292de..cb75e9e5f4fb 100644
--- a/sdk/src/Services/Synthetics/AWSSDK.Synthetics.NetFramework.csproj
+++ b/sdk/src/Services/Synthetics/AWSSDK.Synthetics.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);BCL;AWS_ASYNC_API;CODE_ANALYSIS</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(RuleSetFileForBuild)' == 'false' Or '$(RuleSetFileForBuild)' == '' ">
diff --git a/sdk/src/Services/Synthetics/AWSSDK.Synthetics.NetStandard.csproj b/sdk/src/Services/Synthetics/AWSSDK.Synthetics.NetStandard.csproj
index 25cc0078a5d5..b7b14b6aa748 100644
--- a/sdk/src/Services/Synthetics/AWSSDK.Synthetics.NetStandard.csproj
+++ b/sdk/src/Services/Synthetics/AWSSDK.Synthetics.NetStandard.csproj
@@ -22,6 +22,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <!-- Async Enumerable Compatibility -->
diff --git a/sdk/src/Services/Synthetics/Generated/AmazonSyntheticsConfig.cs b/sdk/src/Services/Synthetics/Generated/AmazonSyntheticsConfig.cs
index bcb4ae40d3e4..8c9d56cf73d8 100644
--- a/sdk/src/Services/Synthetics/Generated/AmazonSyntheticsConfig.cs
+++ b/sdk/src/Services/Synthetics/Generated/AmazonSyntheticsConfig.cs
@@ -34,7 +34,7 @@ namespace Amazon.Synthetics
     public partial class AmazonSyntheticsConfig : ClientConfig
     {
         private static readonly string UserAgentString =
-            InternalSDKUtils.BuildUserAgentString("synthetics", "3.7.300.84");
+            InternalSDKUtils.BuildUserAgentString("synthetics", "4.0.0.0");
 
         private static readonly AmazonSyntheticsEndpointResolver EndpointResolver =
             new AmazonSyntheticsEndpointResolver();
diff --git a/sdk/src/Services/Synthetics/Properties/AssemblyInfo.cs b/sdk/src/Services/Synthetics/Properties/AssemblyInfo.cs
index 262166d388ad..05421abe7586 100644
--- a/sdk/src/Services/Synthetics/Properties/AssemblyInfo.cs
+++ b/sdk/src/Services/Synthetics/Properties/AssemblyInfo.cs
@@ -41,5 +41,9 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.300.84")]
\ No newline at end of file
+#if BCL
+[assembly: AssemblyVersion("4.0")]
+#else
+[assembly: AssemblyVersion("4.0.0.0")]
+#endif
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/src/Services/Textract/AWSSDK.Textract.NetFramework.csproj b/sdk/src/Services/Textract/AWSSDK.Textract.NetFramework.csproj
index 94da8f55393c..bdb59e7a6c66 100644
--- a/sdk/src/Services/Textract/AWSSDK.Textract.NetFramework.csproj
+++ b/sdk/src/Services/Textract/AWSSDK.Textract.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);BCL;AWS_ASYNC_API;CODE_ANALYSIS</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(RuleSetFileForBuild)' == 'false' Or '$(RuleSetFileForBuild)' == '' ">
diff --git a/sdk/src/Services/Textract/AWSSDK.Textract.NetStandard.csproj b/sdk/src/Services/Textract/AWSSDK.Textract.NetStandard.csproj
index a9ad0abf7e6d..4dcbd7489ec7 100644
--- a/sdk/src/Services/Textract/AWSSDK.Textract.NetStandard.csproj
+++ b/sdk/src/Services/Textract/AWSSDK.Textract.NetStandard.csproj
@@ -22,6 +22,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <!-- Async Enumerable Compatibility -->
diff --git a/sdk/src/Services/Textract/Generated/AmazonTextractConfig.cs b/sdk/src/Services/Textract/Generated/AmazonTextractConfig.cs
index 4712e98e6bdd..690022d1fc27 100644
--- a/sdk/src/Services/Textract/Generated/AmazonTextractConfig.cs
+++ b/sdk/src/Services/Textract/Generated/AmazonTextractConfig.cs
@@ -34,7 +34,7 @@ namespace Amazon.Textract
     public partial class AmazonTextractConfig : ClientConfig
     {
         private static readonly string UserAgentString =
-            InternalSDKUtils.BuildUserAgentString("Textract", "3.7.300.84");
+            InternalSDKUtils.BuildUserAgentString("Textract", "4.0.0.0");
 
         private static readonly AmazonTextractEndpointResolver EndpointResolver =
             new AmazonTextractEndpointResolver();
diff --git a/sdk/src/Services/Textract/Properties/AssemblyInfo.cs b/sdk/src/Services/Textract/Properties/AssemblyInfo.cs
index 20a9d27fcf32..aa863779600c 100644
--- a/sdk/src/Services/Textract/Properties/AssemblyInfo.cs
+++ b/sdk/src/Services/Textract/Properties/AssemblyInfo.cs
@@ -41,5 +41,9 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.300.84")]
\ No newline at end of file
+#if BCL
+[assembly: AssemblyVersion("4.0")]
+#else
+[assembly: AssemblyVersion("4.0.0.0")]
+#endif
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/src/Services/TimestreamInfluxDB/AWSSDK.TimestreamInfluxDB.NetFramework.csproj b/sdk/src/Services/TimestreamInfluxDB/AWSSDK.TimestreamInfluxDB.NetFramework.csproj
index 009c8b3e24ac..a7f6cc610149 100644
--- a/sdk/src/Services/TimestreamInfluxDB/AWSSDK.TimestreamInfluxDB.NetFramework.csproj
+++ b/sdk/src/Services/TimestreamInfluxDB/AWSSDK.TimestreamInfluxDB.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);BCL;AWS_ASYNC_API;CODE_ANALYSIS</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(RuleSetFileForBuild)' == 'false' Or '$(RuleSetFileForBuild)' == '' ">
diff --git a/sdk/src/Services/TimestreamInfluxDB/AWSSDK.TimestreamInfluxDB.NetStandard.csproj b/sdk/src/Services/TimestreamInfluxDB/AWSSDK.TimestreamInfluxDB.NetStandard.csproj
index c0518ae10744..6585f6658e22 100644
--- a/sdk/src/Services/TimestreamInfluxDB/AWSSDK.TimestreamInfluxDB.NetStandard.csproj
+++ b/sdk/src/Services/TimestreamInfluxDB/AWSSDK.TimestreamInfluxDB.NetStandard.csproj
@@ -22,6 +22,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <!-- Async Enumerable Compatibility -->
diff --git a/sdk/src/Services/TimestreamInfluxDB/Generated/AmazonTimestreamInfluxDBConfig.cs b/sdk/src/Services/TimestreamInfluxDB/Generated/AmazonTimestreamInfluxDBConfig.cs
index 0981e08a0175..10900aa25c9a 100644
--- a/sdk/src/Services/TimestreamInfluxDB/Generated/AmazonTimestreamInfluxDBConfig.cs
+++ b/sdk/src/Services/TimestreamInfluxDB/Generated/AmazonTimestreamInfluxDBConfig.cs
@@ -34,7 +34,7 @@ namespace Amazon.TimestreamInfluxDB
     public partial class AmazonTimestreamInfluxDBConfig : ClientConfig
     {
         private static readonly string UserAgentString =
-            InternalSDKUtils.BuildUserAgentString("Timestream InfluxDB", "3.7.300.27");
+            InternalSDKUtils.BuildUserAgentString("Timestream InfluxDB", "4.0.0.0");
 
         private static readonly AmazonTimestreamInfluxDBEndpointResolver EndpointResolver =
             new AmazonTimestreamInfluxDBEndpointResolver();
diff --git a/sdk/src/Services/TimestreamInfluxDB/Properties/AssemblyInfo.cs b/sdk/src/Services/TimestreamInfluxDB/Properties/AssemblyInfo.cs
index 5d3aed5c0654..89c2d76c2ef9 100644
--- a/sdk/src/Services/TimestreamInfluxDB/Properties/AssemblyInfo.cs
+++ b/sdk/src/Services/TimestreamInfluxDB/Properties/AssemblyInfo.cs
@@ -41,5 +41,9 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.300.27")]
\ No newline at end of file
+#if BCL
+[assembly: AssemblyVersion("4.0")]
+#else
+[assembly: AssemblyVersion("4.0.0.0")]
+#endif
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/src/Services/TimestreamQuery/AWSSDK.TimestreamQuery.NetFramework.csproj b/sdk/src/Services/TimestreamQuery/AWSSDK.TimestreamQuery.NetFramework.csproj
index 2484b9c6f67c..aa0afa15f5a7 100644
--- a/sdk/src/Services/TimestreamQuery/AWSSDK.TimestreamQuery.NetFramework.csproj
+++ b/sdk/src/Services/TimestreamQuery/AWSSDK.TimestreamQuery.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);BCL;AWS_ASYNC_API;CODE_ANALYSIS</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(RuleSetFileForBuild)' == 'false' Or '$(RuleSetFileForBuild)' == '' ">
diff --git a/sdk/src/Services/TimestreamQuery/AWSSDK.TimestreamQuery.NetStandard.csproj b/sdk/src/Services/TimestreamQuery/AWSSDK.TimestreamQuery.NetStandard.csproj
index cfae4f356a10..50d398d55560 100644
--- a/sdk/src/Services/TimestreamQuery/AWSSDK.TimestreamQuery.NetStandard.csproj
+++ b/sdk/src/Services/TimestreamQuery/AWSSDK.TimestreamQuery.NetStandard.csproj
@@ -22,6 +22,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <!-- Async Enumerable Compatibility -->
diff --git a/sdk/src/Services/TimestreamQuery/Generated/AmazonTimestreamQueryConfig.cs b/sdk/src/Services/TimestreamQuery/Generated/AmazonTimestreamQueryConfig.cs
index fe3f5acec135..97db87d81d94 100644
--- a/sdk/src/Services/TimestreamQuery/Generated/AmazonTimestreamQueryConfig.cs
+++ b/sdk/src/Services/TimestreamQuery/Generated/AmazonTimestreamQueryConfig.cs
@@ -34,7 +34,7 @@ namespace Amazon.TimestreamQuery
     public partial class AmazonTimestreamQueryConfig : ClientConfig
     {
         private static readonly string UserAgentString =
-            InternalSDKUtils.BuildUserAgentString("Timestream Query", "3.7.301.0");
+            InternalSDKUtils.BuildUserAgentString("Timestream Query", "4.0.0.0");
 
         private static readonly AmazonTimestreamQueryEndpointResolver EndpointResolver =
             new AmazonTimestreamQueryEndpointResolver();
diff --git a/sdk/src/Services/TimestreamQuery/Properties/AssemblyInfo.cs b/sdk/src/Services/TimestreamQuery/Properties/AssemblyInfo.cs
index dd1e36ca8688..8aa10815b75d 100644
--- a/sdk/src/Services/TimestreamQuery/Properties/AssemblyInfo.cs
+++ b/sdk/src/Services/TimestreamQuery/Properties/AssemblyInfo.cs
@@ -41,5 +41,9 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.301.0")]
\ No newline at end of file
+#if BCL
+[assembly: AssemblyVersion("4.0")]
+#else
+[assembly: AssemblyVersion("4.0.0.0")]
+#endif
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/src/Services/TimestreamWrite/AWSSDK.TimestreamWrite.NetFramework.csproj b/sdk/src/Services/TimestreamWrite/AWSSDK.TimestreamWrite.NetFramework.csproj
index 05217b65f92e..bd982554ef9a 100644
--- a/sdk/src/Services/TimestreamWrite/AWSSDK.TimestreamWrite.NetFramework.csproj
+++ b/sdk/src/Services/TimestreamWrite/AWSSDK.TimestreamWrite.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);BCL;AWS_ASYNC_API;CODE_ANALYSIS</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(RuleSetFileForBuild)' == 'false' Or '$(RuleSetFileForBuild)' == '' ">
diff --git a/sdk/src/Services/TimestreamWrite/AWSSDK.TimestreamWrite.NetStandard.csproj b/sdk/src/Services/TimestreamWrite/AWSSDK.TimestreamWrite.NetStandard.csproj
index 1e9db2dde418..01ed4d59c84f 100644
--- a/sdk/src/Services/TimestreamWrite/AWSSDK.TimestreamWrite.NetStandard.csproj
+++ b/sdk/src/Services/TimestreamWrite/AWSSDK.TimestreamWrite.NetStandard.csproj
@@ -22,6 +22,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <!-- Async Enumerable Compatibility -->
diff --git a/sdk/src/Services/TimestreamWrite/Generated/AmazonTimestreamWriteConfig.cs b/sdk/src/Services/TimestreamWrite/Generated/AmazonTimestreamWriteConfig.cs
index e1b1d29a2c65..d549b9c36e98 100644
--- a/sdk/src/Services/TimestreamWrite/Generated/AmazonTimestreamWriteConfig.cs
+++ b/sdk/src/Services/TimestreamWrite/Generated/AmazonTimestreamWriteConfig.cs
@@ -34,7 +34,7 @@ namespace Amazon.TimestreamWrite
     public partial class AmazonTimestreamWriteConfig : ClientConfig
     {
         private static readonly string UserAgentString =
-            InternalSDKUtils.BuildUserAgentString("Timestream Write", "3.7.300.84");
+            InternalSDKUtils.BuildUserAgentString("Timestream Write", "4.0.0.0");
 
         private static readonly AmazonTimestreamWriteEndpointResolver EndpointResolver =
             new AmazonTimestreamWriteEndpointResolver();
diff --git a/sdk/src/Services/TimestreamWrite/Properties/AssemblyInfo.cs b/sdk/src/Services/TimestreamWrite/Properties/AssemblyInfo.cs
index fc52fbc40d98..f7712892de0c 100644
--- a/sdk/src/Services/TimestreamWrite/Properties/AssemblyInfo.cs
+++ b/sdk/src/Services/TimestreamWrite/Properties/AssemblyInfo.cs
@@ -41,5 +41,9 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.300.84")]
\ No newline at end of file
+#if BCL
+[assembly: AssemblyVersion("4.0")]
+#else
+[assembly: AssemblyVersion("4.0.0.0")]
+#endif
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/src/Services/Tnb/AWSSDK.Tnb.NetFramework.csproj b/sdk/src/Services/Tnb/AWSSDK.Tnb.NetFramework.csproj
index 2dfd97e0d2a4..56b1fbabb858 100644
--- a/sdk/src/Services/Tnb/AWSSDK.Tnb.NetFramework.csproj
+++ b/sdk/src/Services/Tnb/AWSSDK.Tnb.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);BCL;AWS_ASYNC_API;CODE_ANALYSIS</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(RuleSetFileForBuild)' == 'false' Or '$(RuleSetFileForBuild)' == '' ">
diff --git a/sdk/src/Services/Tnb/AWSSDK.Tnb.NetStandard.csproj b/sdk/src/Services/Tnb/AWSSDK.Tnb.NetStandard.csproj
index 101121371e46..4127d89d7229 100644
--- a/sdk/src/Services/Tnb/AWSSDK.Tnb.NetStandard.csproj
+++ b/sdk/src/Services/Tnb/AWSSDK.Tnb.NetStandard.csproj
@@ -22,6 +22,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <!-- Async Enumerable Compatibility -->
diff --git a/sdk/src/Services/Tnb/Generated/AmazonTnbConfig.cs b/sdk/src/Services/Tnb/Generated/AmazonTnbConfig.cs
index 2879b2885095..95258fb384b2 100644
--- a/sdk/src/Services/Tnb/Generated/AmazonTnbConfig.cs
+++ b/sdk/src/Services/Tnb/Generated/AmazonTnbConfig.cs
@@ -34,7 +34,7 @@ namespace Amazon.Tnb
     public partial class AmazonTnbConfig : ClientConfig
     {
         private static readonly string UserAgentString =
-            InternalSDKUtils.BuildUserAgentString("tnb", "3.7.300.84");
+            InternalSDKUtils.BuildUserAgentString("tnb", "4.0.0.0");
 
         private static readonly AmazonTnbEndpointResolver EndpointResolver =
             new AmazonTnbEndpointResolver();
diff --git a/sdk/src/Services/Tnb/Properties/AssemblyInfo.cs b/sdk/src/Services/Tnb/Properties/AssemblyInfo.cs
index 5f68dc3dffa7..367906d984d8 100644
--- a/sdk/src/Services/Tnb/Properties/AssemblyInfo.cs
+++ b/sdk/src/Services/Tnb/Properties/AssemblyInfo.cs
@@ -41,5 +41,9 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.300.84")]
\ No newline at end of file
+#if BCL
+[assembly: AssemblyVersion("4.0")]
+#else
+[assembly: AssemblyVersion("4.0.0.0")]
+#endif
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/src/Services/TranscribeService/AWSSDK.TranscribeService.NetFramework.csproj b/sdk/src/Services/TranscribeService/AWSSDK.TranscribeService.NetFramework.csproj
index 1b3a0bd36264..1c8e72634d02 100644
--- a/sdk/src/Services/TranscribeService/AWSSDK.TranscribeService.NetFramework.csproj
+++ b/sdk/src/Services/TranscribeService/AWSSDK.TranscribeService.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);BCL;AWS_ASYNC_API;CODE_ANALYSIS</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(RuleSetFileForBuild)' == 'false' Or '$(RuleSetFileForBuild)' == '' ">
diff --git a/sdk/src/Services/TranscribeService/AWSSDK.TranscribeService.NetStandard.csproj b/sdk/src/Services/TranscribeService/AWSSDK.TranscribeService.NetStandard.csproj
index ae559aec9609..f8684ae8d001 100644
--- a/sdk/src/Services/TranscribeService/AWSSDK.TranscribeService.NetStandard.csproj
+++ b/sdk/src/Services/TranscribeService/AWSSDK.TranscribeService.NetStandard.csproj
@@ -22,6 +22,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <!-- Async Enumerable Compatibility -->
diff --git a/sdk/src/Services/TranscribeService/Generated/AmazonTranscribeServiceConfig.cs b/sdk/src/Services/TranscribeService/Generated/AmazonTranscribeServiceConfig.cs
index a72c0b2451fa..8414d81fc395 100644
--- a/sdk/src/Services/TranscribeService/Generated/AmazonTranscribeServiceConfig.cs
+++ b/sdk/src/Services/TranscribeService/Generated/AmazonTranscribeServiceConfig.cs
@@ -34,7 +34,7 @@ namespace Amazon.TranscribeService
     public partial class AmazonTranscribeServiceConfig : ClientConfig
     {
         private static readonly string UserAgentString =
-            InternalSDKUtils.BuildUserAgentString("Transcribe", "3.7.303.0");
+            InternalSDKUtils.BuildUserAgentString("Transcribe", "4.0.0.0");
 
         private static readonly AmazonTranscribeServiceEndpointResolver EndpointResolver =
             new AmazonTranscribeServiceEndpointResolver();
diff --git a/sdk/src/Services/TranscribeService/Properties/AssemblyInfo.cs b/sdk/src/Services/TranscribeService/Properties/AssemblyInfo.cs
index 3b067da68219..c6d3ebb073ba 100644
--- a/sdk/src/Services/TranscribeService/Properties/AssemblyInfo.cs
+++ b/sdk/src/Services/TranscribeService/Properties/AssemblyInfo.cs
@@ -41,5 +41,9 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.303.0")]
\ No newline at end of file
+#if BCL
+[assembly: AssemblyVersion("4.0")]
+#else
+[assembly: AssemblyVersion("4.0.0.0")]
+#endif
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/src/Services/Transfer/AWSSDK.Transfer.NetFramework.csproj b/sdk/src/Services/Transfer/AWSSDK.Transfer.NetFramework.csproj
index 6dd7520a3379..e8288fe85b83 100644
--- a/sdk/src/Services/Transfer/AWSSDK.Transfer.NetFramework.csproj
+++ b/sdk/src/Services/Transfer/AWSSDK.Transfer.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);BCL;AWS_ASYNC_API;CODE_ANALYSIS</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(RuleSetFileForBuild)' == 'false' Or '$(RuleSetFileForBuild)' == '' ">
diff --git a/sdk/src/Services/Transfer/AWSSDK.Transfer.NetStandard.csproj b/sdk/src/Services/Transfer/AWSSDK.Transfer.NetStandard.csproj
index d83b5487f2d9..5a1402e8f0e5 100644
--- a/sdk/src/Services/Transfer/AWSSDK.Transfer.NetStandard.csproj
+++ b/sdk/src/Services/Transfer/AWSSDK.Transfer.NetStandard.csproj
@@ -22,6 +22,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <!-- Async Enumerable Compatibility -->
diff --git a/sdk/src/Services/Transfer/Generated/AmazonTransferConfig.cs b/sdk/src/Services/Transfer/Generated/AmazonTransferConfig.cs
index 30bf77b08b16..518b3e9d43e3 100644
--- a/sdk/src/Services/Transfer/Generated/AmazonTransferConfig.cs
+++ b/sdk/src/Services/Transfer/Generated/AmazonTransferConfig.cs
@@ -34,7 +34,7 @@ namespace Amazon.Transfer
     public partial class AmazonTransferConfig : ClientConfig
     {
         private static readonly string UserAgentString =
-            InternalSDKUtils.BuildUserAgentString("Transfer", "3.7.306.5");
+            InternalSDKUtils.BuildUserAgentString("Transfer", "4.0.0.0");
 
         private static readonly AmazonTransferEndpointResolver EndpointResolver =
             new AmazonTransferEndpointResolver();
diff --git a/sdk/src/Services/Transfer/Properties/AssemblyInfo.cs b/sdk/src/Services/Transfer/Properties/AssemblyInfo.cs
index b9f33f2f6348..f71cb55ab6e4 100644
--- a/sdk/src/Services/Transfer/Properties/AssemblyInfo.cs
+++ b/sdk/src/Services/Transfer/Properties/AssemblyInfo.cs
@@ -41,5 +41,9 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.306.5")]
\ No newline at end of file
+#if BCL
+[assembly: AssemblyVersion("4.0")]
+#else
+[assembly: AssemblyVersion("4.0.0.0")]
+#endif
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/src/Services/Translate/AWSSDK.Translate.NetFramework.csproj b/sdk/src/Services/Translate/AWSSDK.Translate.NetFramework.csproj
index 2699edf7680f..714a57cfd748 100644
--- a/sdk/src/Services/Translate/AWSSDK.Translate.NetFramework.csproj
+++ b/sdk/src/Services/Translate/AWSSDK.Translate.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);BCL;AWS_ASYNC_API;CODE_ANALYSIS</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(RuleSetFileForBuild)' == 'false' Or '$(RuleSetFileForBuild)' == '' ">
diff --git a/sdk/src/Services/Translate/AWSSDK.Translate.NetStandard.csproj b/sdk/src/Services/Translate/AWSSDK.Translate.NetStandard.csproj
index aa1908d2dbe6..21f9f1a34b92 100644
--- a/sdk/src/Services/Translate/AWSSDK.Translate.NetStandard.csproj
+++ b/sdk/src/Services/Translate/AWSSDK.Translate.NetStandard.csproj
@@ -22,6 +22,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <!-- Async Enumerable Compatibility -->
diff --git a/sdk/src/Services/Translate/Generated/AmazonTranslateConfig.cs b/sdk/src/Services/Translate/Generated/AmazonTranslateConfig.cs
index 7220649e2c36..c4182e5c4acc 100644
--- a/sdk/src/Services/Translate/Generated/AmazonTranslateConfig.cs
+++ b/sdk/src/Services/Translate/Generated/AmazonTranslateConfig.cs
@@ -34,7 +34,7 @@ namespace Amazon.Translate
     public partial class AmazonTranslateConfig : ClientConfig
     {
         private static readonly string UserAgentString =
-            InternalSDKUtils.BuildUserAgentString("Translate", "3.7.300.84");
+            InternalSDKUtils.BuildUserAgentString("Translate", "4.0.0.0");
 
         private static readonly AmazonTranslateEndpointResolver EndpointResolver =
             new AmazonTranslateEndpointResolver();
diff --git a/sdk/src/Services/Translate/Properties/AssemblyInfo.cs b/sdk/src/Services/Translate/Properties/AssemblyInfo.cs
index db9e2c267a5f..e04656f06c71 100644
--- a/sdk/src/Services/Translate/Properties/AssemblyInfo.cs
+++ b/sdk/src/Services/Translate/Properties/AssemblyInfo.cs
@@ -41,5 +41,9 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.300.84")]
\ No newline at end of file
+#if BCL
+[assembly: AssemblyVersion("4.0")]
+#else
+[assembly: AssemblyVersion("4.0.0.0")]
+#endif
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/src/Services/TrustedAdvisor/AWSSDK.TrustedAdvisor.NetFramework.csproj b/sdk/src/Services/TrustedAdvisor/AWSSDK.TrustedAdvisor.NetFramework.csproj
index c46b57bf4331..67636c1b21af 100644
--- a/sdk/src/Services/TrustedAdvisor/AWSSDK.TrustedAdvisor.NetFramework.csproj
+++ b/sdk/src/Services/TrustedAdvisor/AWSSDK.TrustedAdvisor.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);BCL;AWS_ASYNC_API;CODE_ANALYSIS</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(RuleSetFileForBuild)' == 'false' Or '$(RuleSetFileForBuild)' == '' ">
diff --git a/sdk/src/Services/TrustedAdvisor/AWSSDK.TrustedAdvisor.NetStandard.csproj b/sdk/src/Services/TrustedAdvisor/AWSSDK.TrustedAdvisor.NetStandard.csproj
index c82af7294ee0..fd58f91e50b9 100644
--- a/sdk/src/Services/TrustedAdvisor/AWSSDK.TrustedAdvisor.NetStandard.csproj
+++ b/sdk/src/Services/TrustedAdvisor/AWSSDK.TrustedAdvisor.NetStandard.csproj
@@ -22,6 +22,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <!-- Async Enumerable Compatibility -->
diff --git a/sdk/src/Services/TrustedAdvisor/Generated/AmazonTrustedAdvisorConfig.cs b/sdk/src/Services/TrustedAdvisor/Generated/AmazonTrustedAdvisorConfig.cs
index 7d240fc190a5..390a10a1450d 100644
--- a/sdk/src/Services/TrustedAdvisor/Generated/AmazonTrustedAdvisorConfig.cs
+++ b/sdk/src/Services/TrustedAdvisor/Generated/AmazonTrustedAdvisorConfig.cs
@@ -34,7 +34,7 @@ namespace Amazon.TrustedAdvisor
     public partial class AmazonTrustedAdvisorConfig : ClientConfig
     {
         private static readonly string UserAgentString =
-            InternalSDKUtils.BuildUserAgentString("TrustedAdvisor", "3.7.301.0");
+            InternalSDKUtils.BuildUserAgentString("TrustedAdvisor", "4.0.0.0");
 
         private static readonly AmazonTrustedAdvisorEndpointResolver EndpointResolver =
             new AmazonTrustedAdvisorEndpointResolver();
diff --git a/sdk/src/Services/TrustedAdvisor/Properties/AssemblyInfo.cs b/sdk/src/Services/TrustedAdvisor/Properties/AssemblyInfo.cs
index 74be5cc60659..f6b5bab5eb5d 100644
--- a/sdk/src/Services/TrustedAdvisor/Properties/AssemblyInfo.cs
+++ b/sdk/src/Services/TrustedAdvisor/Properties/AssemblyInfo.cs
@@ -41,5 +41,9 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.301.0")]
\ No newline at end of file
+#if BCL
+[assembly: AssemblyVersion("4.0")]
+#else
+[assembly: AssemblyVersion("4.0.0.0")]
+#endif
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/src/Services/VPCLattice/AWSSDK.VPCLattice.NetFramework.csproj b/sdk/src/Services/VPCLattice/AWSSDK.VPCLattice.NetFramework.csproj
index 32d43bcbd2af..c2f8ef857dbf 100644
--- a/sdk/src/Services/VPCLattice/AWSSDK.VPCLattice.NetFramework.csproj
+++ b/sdk/src/Services/VPCLattice/AWSSDK.VPCLattice.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);BCL;AWS_ASYNC_API;CODE_ANALYSIS</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(RuleSetFileForBuild)' == 'false' Or '$(RuleSetFileForBuild)' == '' ">
diff --git a/sdk/src/Services/VPCLattice/AWSSDK.VPCLattice.NetStandard.csproj b/sdk/src/Services/VPCLattice/AWSSDK.VPCLattice.NetStandard.csproj
index 4a32ffd2647a..a72a4006ec5c 100644
--- a/sdk/src/Services/VPCLattice/AWSSDK.VPCLattice.NetStandard.csproj
+++ b/sdk/src/Services/VPCLattice/AWSSDK.VPCLattice.NetStandard.csproj
@@ -22,6 +22,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <!-- Async Enumerable Compatibility -->
diff --git a/sdk/src/Services/VPCLattice/Generated/AmazonVPCLatticeConfig.cs b/sdk/src/Services/VPCLattice/Generated/AmazonVPCLatticeConfig.cs
index 899ec9e9f0ed..57783e24aab8 100644
--- a/sdk/src/Services/VPCLattice/Generated/AmazonVPCLatticeConfig.cs
+++ b/sdk/src/Services/VPCLattice/Generated/AmazonVPCLatticeConfig.cs
@@ -34,7 +34,7 @@ namespace Amazon.VPCLattice
     public partial class AmazonVPCLatticeConfig : ClientConfig
     {
         private static readonly string UserAgentString =
-            InternalSDKUtils.BuildUserAgentString("VPC Lattice", "3.7.300.84");
+            InternalSDKUtils.BuildUserAgentString("VPC Lattice", "4.0.0.0");
 
         private static readonly AmazonVPCLatticeEndpointResolver EndpointResolver =
             new AmazonVPCLatticeEndpointResolver();
diff --git a/sdk/src/Services/VPCLattice/Properties/AssemblyInfo.cs b/sdk/src/Services/VPCLattice/Properties/AssemblyInfo.cs
index e0296891f769..bcc729dd856d 100644
--- a/sdk/src/Services/VPCLattice/Properties/AssemblyInfo.cs
+++ b/sdk/src/Services/VPCLattice/Properties/AssemblyInfo.cs
@@ -41,5 +41,9 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.300.84")]
\ No newline at end of file
+#if BCL
+[assembly: AssemblyVersion("4.0")]
+#else
+[assembly: AssemblyVersion("4.0.0.0")]
+#endif
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/src/Services/VerifiedPermissions/AWSSDK.VerifiedPermissions.NetFramework.csproj b/sdk/src/Services/VerifiedPermissions/AWSSDK.VerifiedPermissions.NetFramework.csproj
index 62a9ad690337..3a33c918669a 100644
--- a/sdk/src/Services/VerifiedPermissions/AWSSDK.VerifiedPermissions.NetFramework.csproj
+++ b/sdk/src/Services/VerifiedPermissions/AWSSDK.VerifiedPermissions.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);BCL;AWS_ASYNC_API;CODE_ANALYSIS</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(RuleSetFileForBuild)' == 'false' Or '$(RuleSetFileForBuild)' == '' ">
diff --git a/sdk/src/Services/VerifiedPermissions/AWSSDK.VerifiedPermissions.NetStandard.csproj b/sdk/src/Services/VerifiedPermissions/AWSSDK.VerifiedPermissions.NetStandard.csproj
index 178553263877..e2b06e5358f2 100644
--- a/sdk/src/Services/VerifiedPermissions/AWSSDK.VerifiedPermissions.NetStandard.csproj
+++ b/sdk/src/Services/VerifiedPermissions/AWSSDK.VerifiedPermissions.NetStandard.csproj
@@ -22,6 +22,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <!-- Async Enumerable Compatibility -->
diff --git a/sdk/src/Services/VerifiedPermissions/Generated/AmazonVerifiedPermissionsConfig.cs b/sdk/src/Services/VerifiedPermissions/Generated/AmazonVerifiedPermissionsConfig.cs
index 78d8d5e77ec2..1800d5eb1f09 100644
--- a/sdk/src/Services/VerifiedPermissions/Generated/AmazonVerifiedPermissionsConfig.cs
+++ b/sdk/src/Services/VerifiedPermissions/Generated/AmazonVerifiedPermissionsConfig.cs
@@ -34,7 +34,7 @@ namespace Amazon.VerifiedPermissions
     public partial class AmazonVerifiedPermissionsConfig : ClientConfig
     {
         private static readonly string UserAgentString =
-            InternalSDKUtils.BuildUserAgentString("VerifiedPermissions", "3.7.305.14");
+            InternalSDKUtils.BuildUserAgentString("VerifiedPermissions", "4.0.0.0");
 
         private static readonly AmazonVerifiedPermissionsEndpointResolver EndpointResolver =
             new AmazonVerifiedPermissionsEndpointResolver();
diff --git a/sdk/src/Services/VerifiedPermissions/Properties/AssemblyInfo.cs b/sdk/src/Services/VerifiedPermissions/Properties/AssemblyInfo.cs
index ca7427a52235..ad4b85d09e0c 100644
--- a/sdk/src/Services/VerifiedPermissions/Properties/AssemblyInfo.cs
+++ b/sdk/src/Services/VerifiedPermissions/Properties/AssemblyInfo.cs
@@ -41,5 +41,9 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.305.14")]
\ No newline at end of file
+#if BCL
+[assembly: AssemblyVersion("4.0")]
+#else
+[assembly: AssemblyVersion("4.0.0.0")]
+#endif
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/src/Services/VoiceID/AWSSDK.VoiceID.NetFramework.csproj b/sdk/src/Services/VoiceID/AWSSDK.VoiceID.NetFramework.csproj
index 4091af8fffa0..b4e7588fbb51 100644
--- a/sdk/src/Services/VoiceID/AWSSDK.VoiceID.NetFramework.csproj
+++ b/sdk/src/Services/VoiceID/AWSSDK.VoiceID.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);BCL;AWS_ASYNC_API;CODE_ANALYSIS</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(RuleSetFileForBuild)' == 'false' Or '$(RuleSetFileForBuild)' == '' ">
diff --git a/sdk/src/Services/VoiceID/AWSSDK.VoiceID.NetStandard.csproj b/sdk/src/Services/VoiceID/AWSSDK.VoiceID.NetStandard.csproj
index 278528e7419a..0576d030e8b3 100644
--- a/sdk/src/Services/VoiceID/AWSSDK.VoiceID.NetStandard.csproj
+++ b/sdk/src/Services/VoiceID/AWSSDK.VoiceID.NetStandard.csproj
@@ -22,6 +22,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <!-- Async Enumerable Compatibility -->
diff --git a/sdk/src/Services/VoiceID/Generated/AmazonVoiceIDConfig.cs b/sdk/src/Services/VoiceID/Generated/AmazonVoiceIDConfig.cs
index 248a6b22ca21..442b149608c5 100644
--- a/sdk/src/Services/VoiceID/Generated/AmazonVoiceIDConfig.cs
+++ b/sdk/src/Services/VoiceID/Generated/AmazonVoiceIDConfig.cs
@@ -34,7 +34,7 @@ namespace Amazon.VoiceID
     public partial class AmazonVoiceIDConfig : ClientConfig
     {
         private static readonly string UserAgentString =
-            InternalSDKUtils.BuildUserAgentString("Voice ID", "3.7.300.84");
+            InternalSDKUtils.BuildUserAgentString("Voice ID", "4.0.0.0");
 
         private static readonly AmazonVoiceIDEndpointResolver EndpointResolver =
             new AmazonVoiceIDEndpointResolver();
diff --git a/sdk/src/Services/VoiceID/Properties/AssemblyInfo.cs b/sdk/src/Services/VoiceID/Properties/AssemblyInfo.cs
index 8ff6f5111348..541e02ff3d9c 100644
--- a/sdk/src/Services/VoiceID/Properties/AssemblyInfo.cs
+++ b/sdk/src/Services/VoiceID/Properties/AssemblyInfo.cs
@@ -41,5 +41,9 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.300.84")]
\ No newline at end of file
+#if BCL
+[assembly: AssemblyVersion("4.0")]
+#else
+[assembly: AssemblyVersion("4.0.0.0")]
+#endif
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/src/Services/WAF/AWSSDK.WAF.NetFramework.csproj b/sdk/src/Services/WAF/AWSSDK.WAF.NetFramework.csproj
index 42bb1f8b695a..d9a7b7dec5e3 100644
--- a/sdk/src/Services/WAF/AWSSDK.WAF.NetFramework.csproj
+++ b/sdk/src/Services/WAF/AWSSDK.WAF.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);BCL;AWS_ASYNC_API;CODE_ANALYSIS</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(RuleSetFileForBuild)' == 'false' Or '$(RuleSetFileForBuild)' == '' ">
diff --git a/sdk/src/Services/WAF/AWSSDK.WAF.NetStandard.csproj b/sdk/src/Services/WAF/AWSSDK.WAF.NetStandard.csproj
index da515065f540..3ddc944a885b 100644
--- a/sdk/src/Services/WAF/AWSSDK.WAF.NetStandard.csproj
+++ b/sdk/src/Services/WAF/AWSSDK.WAF.NetStandard.csproj
@@ -22,6 +22,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <!-- Async Enumerable Compatibility -->
diff --git a/sdk/src/Services/WAF/Generated/AmazonWAFConfig.cs b/sdk/src/Services/WAF/Generated/AmazonWAFConfig.cs
index 8aa4003af856..01d0816fd8fb 100644
--- a/sdk/src/Services/WAF/Generated/AmazonWAFConfig.cs
+++ b/sdk/src/Services/WAF/Generated/AmazonWAFConfig.cs
@@ -34,7 +34,7 @@ namespace Amazon.WAF
     public partial class AmazonWAFConfig : ClientConfig
     {
         private static readonly string UserAgentString =
-            InternalSDKUtils.BuildUserAgentString("WAF", "3.7.300.84");
+            InternalSDKUtils.BuildUserAgentString("WAF", "4.0.0.0");
 
         private static readonly AmazonWAFEndpointResolver EndpointResolver =
             new AmazonWAFEndpointResolver();
diff --git a/sdk/src/Services/WAF/Properties/AssemblyInfo.cs b/sdk/src/Services/WAF/Properties/AssemblyInfo.cs
index 583c53d449fc..2b1d6faa3a63 100644
--- a/sdk/src/Services/WAF/Properties/AssemblyInfo.cs
+++ b/sdk/src/Services/WAF/Properties/AssemblyInfo.cs
@@ -41,5 +41,9 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.300.84")]
\ No newline at end of file
+#if BCL
+[assembly: AssemblyVersion("4.0")]
+#else
+[assembly: AssemblyVersion("4.0.0.0")]
+#endif
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/src/Services/WAFRegional/AWSSDK.WAFRegional.NetFramework.csproj b/sdk/src/Services/WAFRegional/AWSSDK.WAFRegional.NetFramework.csproj
index 6712604e7e35..8ae6052254d1 100644
--- a/sdk/src/Services/WAFRegional/AWSSDK.WAFRegional.NetFramework.csproj
+++ b/sdk/src/Services/WAFRegional/AWSSDK.WAFRegional.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);BCL;AWS_ASYNC_API;CODE_ANALYSIS</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(RuleSetFileForBuild)' == 'false' Or '$(RuleSetFileForBuild)' == '' ">
diff --git a/sdk/src/Services/WAFRegional/AWSSDK.WAFRegional.NetStandard.csproj b/sdk/src/Services/WAFRegional/AWSSDK.WAFRegional.NetStandard.csproj
index 735db274830a..9dde2f50316c 100644
--- a/sdk/src/Services/WAFRegional/AWSSDK.WAFRegional.NetStandard.csproj
+++ b/sdk/src/Services/WAFRegional/AWSSDK.WAFRegional.NetStandard.csproj
@@ -22,6 +22,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <!-- Async Enumerable Compatibility -->
diff --git a/sdk/src/Services/WAFRegional/Generated/AmazonWAFRegionalConfig.cs b/sdk/src/Services/WAFRegional/Generated/AmazonWAFRegionalConfig.cs
index a2cbbca772c5..beb2718d4e8e 100644
--- a/sdk/src/Services/WAFRegional/Generated/AmazonWAFRegionalConfig.cs
+++ b/sdk/src/Services/WAFRegional/Generated/AmazonWAFRegionalConfig.cs
@@ -34,7 +34,7 @@ namespace Amazon.WAFRegional
     public partial class AmazonWAFRegionalConfig : ClientConfig
     {
         private static readonly string UserAgentString =
-            InternalSDKUtils.BuildUserAgentString("WAF Regional", "3.7.300.84");
+            InternalSDKUtils.BuildUserAgentString("WAF Regional", "4.0.0.0");
 
         private static readonly AmazonWAFRegionalEndpointResolver EndpointResolver =
             new AmazonWAFRegionalEndpointResolver();
diff --git a/sdk/src/Services/WAFRegional/Properties/AssemblyInfo.cs b/sdk/src/Services/WAFRegional/Properties/AssemblyInfo.cs
index 04228e455b8e..5bb34b34ceaa 100644
--- a/sdk/src/Services/WAFRegional/Properties/AssemblyInfo.cs
+++ b/sdk/src/Services/WAFRegional/Properties/AssemblyInfo.cs
@@ -41,5 +41,9 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.300.84")]
\ No newline at end of file
+#if BCL
+[assembly: AssemblyVersion("4.0")]
+#else
+[assembly: AssemblyVersion("4.0.0.0")]
+#endif
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/src/Services/WAFV2/AWSSDK.WAFV2.NetFramework.csproj b/sdk/src/Services/WAFV2/AWSSDK.WAFV2.NetFramework.csproj
index 4917906fa27f..5fe573369ffa 100644
--- a/sdk/src/Services/WAFV2/AWSSDK.WAFV2.NetFramework.csproj
+++ b/sdk/src/Services/WAFV2/AWSSDK.WAFV2.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);BCL;AWS_ASYNC_API;CODE_ANALYSIS</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(RuleSetFileForBuild)' == 'false' Or '$(RuleSetFileForBuild)' == '' ">
diff --git a/sdk/src/Services/WAFV2/AWSSDK.WAFV2.NetStandard.csproj b/sdk/src/Services/WAFV2/AWSSDK.WAFV2.NetStandard.csproj
index 760be210673d..99f0672102eb 100644
--- a/sdk/src/Services/WAFV2/AWSSDK.WAFV2.NetStandard.csproj
+++ b/sdk/src/Services/WAFV2/AWSSDK.WAFV2.NetStandard.csproj
@@ -22,6 +22,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <!-- Async Enumerable Compatibility -->
diff --git a/sdk/src/Services/WAFV2/Generated/AmazonWAFV2Config.cs b/sdk/src/Services/WAFV2/Generated/AmazonWAFV2Config.cs
index df6b521852c9..19754068fe96 100644
--- a/sdk/src/Services/WAFV2/Generated/AmazonWAFV2Config.cs
+++ b/sdk/src/Services/WAFV2/Generated/AmazonWAFV2Config.cs
@@ -34,7 +34,7 @@ namespace Amazon.WAFV2
     public partial class AmazonWAFV2Config : ClientConfig
     {
         private static readonly string UserAgentString =
-            InternalSDKUtils.BuildUserAgentString("WAFV2", "3.7.304.10");
+            InternalSDKUtils.BuildUserAgentString("WAFV2", "4.0.0.0");
 
         private static readonly AmazonWAFV2EndpointResolver EndpointResolver =
             new AmazonWAFV2EndpointResolver();
diff --git a/sdk/src/Services/WAFV2/Properties/AssemblyInfo.cs b/sdk/src/Services/WAFV2/Properties/AssemblyInfo.cs
index b5ec8d88f11f..70550ac25ef4 100644
--- a/sdk/src/Services/WAFV2/Properties/AssemblyInfo.cs
+++ b/sdk/src/Services/WAFV2/Properties/AssemblyInfo.cs
@@ -41,5 +41,9 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.304.10")]
\ No newline at end of file
+#if BCL
+[assembly: AssemblyVersion("4.0")]
+#else
+[assembly: AssemblyVersion("4.0.0.0")]
+#endif
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/src/Services/WellArchitected/AWSSDK.WellArchitected.NetFramework.csproj b/sdk/src/Services/WellArchitected/AWSSDK.WellArchitected.NetFramework.csproj
index 5dd917536f6a..b5eba314896f 100644
--- a/sdk/src/Services/WellArchitected/AWSSDK.WellArchitected.NetFramework.csproj
+++ b/sdk/src/Services/WellArchitected/AWSSDK.WellArchitected.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);BCL;AWS_ASYNC_API;CODE_ANALYSIS</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(RuleSetFileForBuild)' == 'false' Or '$(RuleSetFileForBuild)' == '' ">
diff --git a/sdk/src/Services/WellArchitected/AWSSDK.WellArchitected.NetStandard.csproj b/sdk/src/Services/WellArchitected/AWSSDK.WellArchitected.NetStandard.csproj
index f8e16bf6ffdd..826bbb448b00 100644
--- a/sdk/src/Services/WellArchitected/AWSSDK.WellArchitected.NetStandard.csproj
+++ b/sdk/src/Services/WellArchitected/AWSSDK.WellArchitected.NetStandard.csproj
@@ -22,6 +22,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <!-- Async Enumerable Compatibility -->
diff --git a/sdk/src/Services/WellArchitected/Generated/AmazonWellArchitectedConfig.cs b/sdk/src/Services/WellArchitected/Generated/AmazonWellArchitectedConfig.cs
index aab3b01f3338..10bc3f1903ee 100644
--- a/sdk/src/Services/WellArchitected/Generated/AmazonWellArchitectedConfig.cs
+++ b/sdk/src/Services/WellArchitected/Generated/AmazonWellArchitectedConfig.cs
@@ -34,7 +34,7 @@ namespace Amazon.WellArchitected
     public partial class AmazonWellArchitectedConfig : ClientConfig
     {
         private static readonly string UserAgentString =
-            InternalSDKUtils.BuildUserAgentString("WellArchitected", "3.7.301.9");
+            InternalSDKUtils.BuildUserAgentString("WellArchitected", "4.0.0.0");
 
         private static readonly AmazonWellArchitectedEndpointResolver EndpointResolver =
             new AmazonWellArchitectedEndpointResolver();
diff --git a/sdk/src/Services/WellArchitected/Properties/AssemblyInfo.cs b/sdk/src/Services/WellArchitected/Properties/AssemblyInfo.cs
index 58a1935efc86..2d600a9d2343 100644
--- a/sdk/src/Services/WellArchitected/Properties/AssemblyInfo.cs
+++ b/sdk/src/Services/WellArchitected/Properties/AssemblyInfo.cs
@@ -41,5 +41,9 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.301.9")]
\ No newline at end of file
+#if BCL
+[assembly: AssemblyVersion("4.0")]
+#else
+[assembly: AssemblyVersion("4.0.0.0")]
+#endif
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/src/Services/WorkDocs/AWSSDK.WorkDocs.NetFramework.csproj b/sdk/src/Services/WorkDocs/AWSSDK.WorkDocs.NetFramework.csproj
index 0f799405815c..da5ee20918cb 100644
--- a/sdk/src/Services/WorkDocs/AWSSDK.WorkDocs.NetFramework.csproj
+++ b/sdk/src/Services/WorkDocs/AWSSDK.WorkDocs.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);BCL;AWS_ASYNC_API;CODE_ANALYSIS</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(RuleSetFileForBuild)' == 'false' Or '$(RuleSetFileForBuild)' == '' ">
diff --git a/sdk/src/Services/WorkDocs/AWSSDK.WorkDocs.NetStandard.csproj b/sdk/src/Services/WorkDocs/AWSSDK.WorkDocs.NetStandard.csproj
index 082ff0d3a3e6..f437a57ba62a 100644
--- a/sdk/src/Services/WorkDocs/AWSSDK.WorkDocs.NetStandard.csproj
+++ b/sdk/src/Services/WorkDocs/AWSSDK.WorkDocs.NetStandard.csproj
@@ -22,6 +22,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <!-- Async Enumerable Compatibility -->
diff --git a/sdk/src/Services/WorkDocs/Generated/AmazonWorkDocsConfig.cs b/sdk/src/Services/WorkDocs/Generated/AmazonWorkDocsConfig.cs
index 774a1ac14621..f0de8f27938e 100644
--- a/sdk/src/Services/WorkDocs/Generated/AmazonWorkDocsConfig.cs
+++ b/sdk/src/Services/WorkDocs/Generated/AmazonWorkDocsConfig.cs
@@ -34,7 +34,7 @@ namespace Amazon.WorkDocs
     public partial class AmazonWorkDocsConfig : ClientConfig
     {
         private static readonly string UserAgentString =
-            InternalSDKUtils.BuildUserAgentString("WorkDocs", "3.7.300.84");
+            InternalSDKUtils.BuildUserAgentString("WorkDocs", "4.0.0.0");
 
         private static readonly AmazonWorkDocsEndpointResolver EndpointResolver =
             new AmazonWorkDocsEndpointResolver();
diff --git a/sdk/src/Services/WorkDocs/Properties/AssemblyInfo.cs b/sdk/src/Services/WorkDocs/Properties/AssemblyInfo.cs
index 744df85a9267..e24c6736c6d2 100644
--- a/sdk/src/Services/WorkDocs/Properties/AssemblyInfo.cs
+++ b/sdk/src/Services/WorkDocs/Properties/AssemblyInfo.cs
@@ -41,5 +41,9 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.300.84")]
\ No newline at end of file
+#if BCL
+[assembly: AssemblyVersion("4.0")]
+#else
+[assembly: AssemblyVersion("4.0.0.0")]
+#endif
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/src/Services/WorkLink/AWSSDK.WorkLink.NetFramework.csproj b/sdk/src/Services/WorkLink/AWSSDK.WorkLink.NetFramework.csproj
index 799c1975eb51..c573d7279f04 100644
--- a/sdk/src/Services/WorkLink/AWSSDK.WorkLink.NetFramework.csproj
+++ b/sdk/src/Services/WorkLink/AWSSDK.WorkLink.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);BCL;AWS_ASYNC_API;CODE_ANALYSIS</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(RuleSetFileForBuild)' == 'false' Or '$(RuleSetFileForBuild)' == '' ">
diff --git a/sdk/src/Services/WorkLink/AWSSDK.WorkLink.NetStandard.csproj b/sdk/src/Services/WorkLink/AWSSDK.WorkLink.NetStandard.csproj
index a5a3101b418f..026151abebe7 100644
--- a/sdk/src/Services/WorkLink/AWSSDK.WorkLink.NetStandard.csproj
+++ b/sdk/src/Services/WorkLink/AWSSDK.WorkLink.NetStandard.csproj
@@ -22,6 +22,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <!-- Async Enumerable Compatibility -->
diff --git a/sdk/src/Services/WorkLink/Generated/AmazonWorkLinkConfig.cs b/sdk/src/Services/WorkLink/Generated/AmazonWorkLinkConfig.cs
index 5fb78c5848ee..5998af2c4a51 100644
--- a/sdk/src/Services/WorkLink/Generated/AmazonWorkLinkConfig.cs
+++ b/sdk/src/Services/WorkLink/Generated/AmazonWorkLinkConfig.cs
@@ -34,7 +34,7 @@ namespace Amazon.WorkLink
     public partial class AmazonWorkLinkConfig : ClientConfig
     {
         private static readonly string UserAgentString =
-            InternalSDKUtils.BuildUserAgentString("WorkLink", "3.7.300.84");
+            InternalSDKUtils.BuildUserAgentString("WorkLink", "4.0.0.0");
 
         private static readonly AmazonWorkLinkEndpointResolver EndpointResolver =
             new AmazonWorkLinkEndpointResolver();
diff --git a/sdk/src/Services/WorkLink/Properties/AssemblyInfo.cs b/sdk/src/Services/WorkLink/Properties/AssemblyInfo.cs
index 5be49380233c..19c877ff6b53 100644
--- a/sdk/src/Services/WorkLink/Properties/AssemblyInfo.cs
+++ b/sdk/src/Services/WorkLink/Properties/AssemblyInfo.cs
@@ -41,5 +41,9 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.300.84")]
\ No newline at end of file
+#if BCL
+[assembly: AssemblyVersion("4.0")]
+#else
+[assembly: AssemblyVersion("4.0.0.0")]
+#endif
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/src/Services/WorkMail/AWSSDK.WorkMail.NetFramework.csproj b/sdk/src/Services/WorkMail/AWSSDK.WorkMail.NetFramework.csproj
index 09efc9c26f83..2ee9167ca37f 100644
--- a/sdk/src/Services/WorkMail/AWSSDK.WorkMail.NetFramework.csproj
+++ b/sdk/src/Services/WorkMail/AWSSDK.WorkMail.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);BCL;AWS_ASYNC_API;CODE_ANALYSIS</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(RuleSetFileForBuild)' == 'false' Or '$(RuleSetFileForBuild)' == '' ">
diff --git a/sdk/src/Services/WorkMail/AWSSDK.WorkMail.NetStandard.csproj b/sdk/src/Services/WorkMail/AWSSDK.WorkMail.NetStandard.csproj
index 7532a5376a49..421d5e57722b 100644
--- a/sdk/src/Services/WorkMail/AWSSDK.WorkMail.NetStandard.csproj
+++ b/sdk/src/Services/WorkMail/AWSSDK.WorkMail.NetStandard.csproj
@@ -22,6 +22,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <!-- Async Enumerable Compatibility -->
diff --git a/sdk/src/Services/WorkMail/Generated/AmazonWorkMailConfig.cs b/sdk/src/Services/WorkMail/Generated/AmazonWorkMailConfig.cs
index fdb0caf897e8..66303c88edb3 100644
--- a/sdk/src/Services/WorkMail/Generated/AmazonWorkMailConfig.cs
+++ b/sdk/src/Services/WorkMail/Generated/AmazonWorkMailConfig.cs
@@ -34,7 +34,7 @@ namespace Amazon.WorkMail
     public partial class AmazonWorkMailConfig : ClientConfig
     {
         private static readonly string UserAgentString =
-            InternalSDKUtils.BuildUserAgentString("WorkMail", "3.7.300.84");
+            InternalSDKUtils.BuildUserAgentString("WorkMail", "4.0.0.0");
 
         private static readonly AmazonWorkMailEndpointResolver EndpointResolver =
             new AmazonWorkMailEndpointResolver();
diff --git a/sdk/src/Services/WorkMail/Properties/AssemblyInfo.cs b/sdk/src/Services/WorkMail/Properties/AssemblyInfo.cs
index b1d85b22ec78..d9ca7c60e306 100644
--- a/sdk/src/Services/WorkMail/Properties/AssemblyInfo.cs
+++ b/sdk/src/Services/WorkMail/Properties/AssemblyInfo.cs
@@ -41,5 +41,9 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.300.84")]
\ No newline at end of file
+#if BCL
+[assembly: AssemblyVersion("4.0")]
+#else
+[assembly: AssemblyVersion("4.0.0.0")]
+#endif
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/src/Services/WorkMailMessageFlow/AWSSDK.WorkMailMessageFlow.NetFramework.csproj b/sdk/src/Services/WorkMailMessageFlow/AWSSDK.WorkMailMessageFlow.NetFramework.csproj
index 75dc1739a9c2..66ae3ebb1c92 100644
--- a/sdk/src/Services/WorkMailMessageFlow/AWSSDK.WorkMailMessageFlow.NetFramework.csproj
+++ b/sdk/src/Services/WorkMailMessageFlow/AWSSDK.WorkMailMessageFlow.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);BCL;AWS_ASYNC_API;CODE_ANALYSIS</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(RuleSetFileForBuild)' == 'false' Or '$(RuleSetFileForBuild)' == '' ">
diff --git a/sdk/src/Services/WorkMailMessageFlow/AWSSDK.WorkMailMessageFlow.NetStandard.csproj b/sdk/src/Services/WorkMailMessageFlow/AWSSDK.WorkMailMessageFlow.NetStandard.csproj
index 7f245451dc3e..57c8283e2d77 100644
--- a/sdk/src/Services/WorkMailMessageFlow/AWSSDK.WorkMailMessageFlow.NetStandard.csproj
+++ b/sdk/src/Services/WorkMailMessageFlow/AWSSDK.WorkMailMessageFlow.NetStandard.csproj
@@ -22,6 +22,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <!-- Async Enumerable Compatibility -->
diff --git a/sdk/src/Services/WorkMailMessageFlow/Generated/AmazonWorkMailMessageFlowConfig.cs b/sdk/src/Services/WorkMailMessageFlow/Generated/AmazonWorkMailMessageFlowConfig.cs
index 3c52f94ed195..84c925aabf61 100644
--- a/sdk/src/Services/WorkMailMessageFlow/Generated/AmazonWorkMailMessageFlowConfig.cs
+++ b/sdk/src/Services/WorkMailMessageFlow/Generated/AmazonWorkMailMessageFlowConfig.cs
@@ -34,7 +34,7 @@ namespace Amazon.WorkMailMessageFlow
     public partial class AmazonWorkMailMessageFlowConfig : ClientConfig
     {
         private static readonly string UserAgentString =
-            InternalSDKUtils.BuildUserAgentString("WorkMailMessageFlow", "3.7.300.84");
+            InternalSDKUtils.BuildUserAgentString("WorkMailMessageFlow", "4.0.0.0");
 
         private static readonly AmazonWorkMailMessageFlowEndpointResolver EndpointResolver =
             new AmazonWorkMailMessageFlowEndpointResolver();
diff --git a/sdk/src/Services/WorkMailMessageFlow/Properties/AssemblyInfo.cs b/sdk/src/Services/WorkMailMessageFlow/Properties/AssemblyInfo.cs
index b89e03c0ee1c..d8eee4f54f8c 100644
--- a/sdk/src/Services/WorkMailMessageFlow/Properties/AssemblyInfo.cs
+++ b/sdk/src/Services/WorkMailMessageFlow/Properties/AssemblyInfo.cs
@@ -41,5 +41,9 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.300.84")]
\ No newline at end of file
+#if BCL
+[assembly: AssemblyVersion("4.0")]
+#else
+[assembly: AssemblyVersion("4.0.0.0")]
+#endif
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/src/Services/WorkSpaces/AWSSDK.WorkSpaces.NetFramework.csproj b/sdk/src/Services/WorkSpaces/AWSSDK.WorkSpaces.NetFramework.csproj
index ea0f314f280b..7e2f0002ad6a 100644
--- a/sdk/src/Services/WorkSpaces/AWSSDK.WorkSpaces.NetFramework.csproj
+++ b/sdk/src/Services/WorkSpaces/AWSSDK.WorkSpaces.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);BCL;AWS_ASYNC_API;CODE_ANALYSIS</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(RuleSetFileForBuild)' == 'false' Or '$(RuleSetFileForBuild)' == '' ">
diff --git a/sdk/src/Services/WorkSpaces/AWSSDK.WorkSpaces.NetStandard.csproj b/sdk/src/Services/WorkSpaces/AWSSDK.WorkSpaces.NetStandard.csproj
index 0f5b139d27cc..8926c1ea9ee5 100644
--- a/sdk/src/Services/WorkSpaces/AWSSDK.WorkSpaces.NetStandard.csproj
+++ b/sdk/src/Services/WorkSpaces/AWSSDK.WorkSpaces.NetStandard.csproj
@@ -22,6 +22,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <!-- Async Enumerable Compatibility -->
diff --git a/sdk/src/Services/WorkSpaces/Generated/AmazonWorkSpacesConfig.cs b/sdk/src/Services/WorkSpaces/Generated/AmazonWorkSpacesConfig.cs
index 2d94eb60f561..8ebd90871369 100644
--- a/sdk/src/Services/WorkSpaces/Generated/AmazonWorkSpacesConfig.cs
+++ b/sdk/src/Services/WorkSpaces/Generated/AmazonWorkSpacesConfig.cs
@@ -34,7 +34,7 @@ namespace Amazon.WorkSpaces
     public partial class AmazonWorkSpacesConfig : ClientConfig
     {
         private static readonly string UserAgentString =
-            InternalSDKUtils.BuildUserAgentString("WorkSpaces", "3.7.303.7");
+            InternalSDKUtils.BuildUserAgentString("WorkSpaces", "4.0.0.0");
 
         private static readonly AmazonWorkSpacesEndpointResolver EndpointResolver =
             new AmazonWorkSpacesEndpointResolver();
diff --git a/sdk/src/Services/WorkSpaces/Properties/AssemblyInfo.cs b/sdk/src/Services/WorkSpaces/Properties/AssemblyInfo.cs
index c5b3afcc8794..8ed1871cc7fa 100644
--- a/sdk/src/Services/WorkSpaces/Properties/AssemblyInfo.cs
+++ b/sdk/src/Services/WorkSpaces/Properties/AssemblyInfo.cs
@@ -41,5 +41,9 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.303.7")]
\ No newline at end of file
+#if BCL
+[assembly: AssemblyVersion("4.0")]
+#else
+[assembly: AssemblyVersion("4.0.0.0")]
+#endif
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/src/Services/WorkSpacesThinClient/AWSSDK.WorkSpacesThinClient.NetFramework.csproj b/sdk/src/Services/WorkSpacesThinClient/AWSSDK.WorkSpacesThinClient.NetFramework.csproj
index 0c148e539c61..18b496f8b7b5 100644
--- a/sdk/src/Services/WorkSpacesThinClient/AWSSDK.WorkSpacesThinClient.NetFramework.csproj
+++ b/sdk/src/Services/WorkSpacesThinClient/AWSSDK.WorkSpacesThinClient.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);BCL;AWS_ASYNC_API;CODE_ANALYSIS</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(RuleSetFileForBuild)' == 'false' Or '$(RuleSetFileForBuild)' == '' ">
diff --git a/sdk/src/Services/WorkSpacesThinClient/AWSSDK.WorkSpacesThinClient.NetStandard.csproj b/sdk/src/Services/WorkSpacesThinClient/AWSSDK.WorkSpacesThinClient.NetStandard.csproj
index 5c6a6980ab3e..02ab5078a9fa 100644
--- a/sdk/src/Services/WorkSpacesThinClient/AWSSDK.WorkSpacesThinClient.NetStandard.csproj
+++ b/sdk/src/Services/WorkSpacesThinClient/AWSSDK.WorkSpacesThinClient.NetStandard.csproj
@@ -22,6 +22,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <!-- Async Enumerable Compatibility -->
diff --git a/sdk/src/Services/WorkSpacesThinClient/Generated/AmazonWorkSpacesThinClientConfig.cs b/sdk/src/Services/WorkSpacesThinClient/Generated/AmazonWorkSpacesThinClientConfig.cs
index c7ec80f0afed..28940efef829 100644
--- a/sdk/src/Services/WorkSpacesThinClient/Generated/AmazonWorkSpacesThinClientConfig.cs
+++ b/sdk/src/Services/WorkSpacesThinClient/Generated/AmazonWorkSpacesThinClientConfig.cs
@@ -34,7 +34,7 @@ namespace Amazon.WorkSpacesThinClient
     public partial class AmazonWorkSpacesThinClientConfig : ClientConfig
     {
         private static readonly string UserAgentString =
-            InternalSDKUtils.BuildUserAgentString("WorkSpaces Thin Client", "3.7.302.11");
+            InternalSDKUtils.BuildUserAgentString("WorkSpaces Thin Client", "4.0.0.0");
 
         private static readonly AmazonWorkSpacesThinClientEndpointResolver EndpointResolver =
             new AmazonWorkSpacesThinClientEndpointResolver();
diff --git a/sdk/src/Services/WorkSpacesThinClient/Properties/AssemblyInfo.cs b/sdk/src/Services/WorkSpacesThinClient/Properties/AssemblyInfo.cs
index 6a0aba3039a9..0eaee1fa2b6e 100644
--- a/sdk/src/Services/WorkSpacesThinClient/Properties/AssemblyInfo.cs
+++ b/sdk/src/Services/WorkSpacesThinClient/Properties/AssemblyInfo.cs
@@ -41,5 +41,9 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.302.11")]
\ No newline at end of file
+#if BCL
+[assembly: AssemblyVersion("4.0")]
+#else
+[assembly: AssemblyVersion("4.0.0.0")]
+#endif
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/src/Services/WorkSpacesWeb/AWSSDK.WorkSpacesWeb.NetFramework.csproj b/sdk/src/Services/WorkSpacesWeb/AWSSDK.WorkSpacesWeb.NetFramework.csproj
index 07de49bc2d35..51071ccd98b1 100644
--- a/sdk/src/Services/WorkSpacesWeb/AWSSDK.WorkSpacesWeb.NetFramework.csproj
+++ b/sdk/src/Services/WorkSpacesWeb/AWSSDK.WorkSpacesWeb.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);BCL;AWS_ASYNC_API;CODE_ANALYSIS</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(RuleSetFileForBuild)' == 'false' Or '$(RuleSetFileForBuild)' == '' ">
diff --git a/sdk/src/Services/WorkSpacesWeb/AWSSDK.WorkSpacesWeb.NetStandard.csproj b/sdk/src/Services/WorkSpacesWeb/AWSSDK.WorkSpacesWeb.NetStandard.csproj
index fe9bb0cdca05..07cee32cd544 100644
--- a/sdk/src/Services/WorkSpacesWeb/AWSSDK.WorkSpacesWeb.NetStandard.csproj
+++ b/sdk/src/Services/WorkSpacesWeb/AWSSDK.WorkSpacesWeb.NetStandard.csproj
@@ -22,6 +22,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <!-- Async Enumerable Compatibility -->
diff --git a/sdk/src/Services/WorkSpacesWeb/Generated/AmazonWorkSpacesWebConfig.cs b/sdk/src/Services/WorkSpacesWeb/Generated/AmazonWorkSpacesWebConfig.cs
index 66cb6e0da739..97e0006cb77d 100644
--- a/sdk/src/Services/WorkSpacesWeb/Generated/AmazonWorkSpacesWebConfig.cs
+++ b/sdk/src/Services/WorkSpacesWeb/Generated/AmazonWorkSpacesWebConfig.cs
@@ -34,7 +34,7 @@ namespace Amazon.WorkSpacesWeb
     public partial class AmazonWorkSpacesWebConfig : ClientConfig
     {
         private static readonly string UserAgentString =
-            InternalSDKUtils.BuildUserAgentString("WorkSpaces Web", "3.7.301.4");
+            InternalSDKUtils.BuildUserAgentString("WorkSpaces Web", "4.0.0.0");
 
         private static readonly AmazonWorkSpacesWebEndpointResolver EndpointResolver =
             new AmazonWorkSpacesWebEndpointResolver();
diff --git a/sdk/src/Services/WorkSpacesWeb/Properties/AssemblyInfo.cs b/sdk/src/Services/WorkSpacesWeb/Properties/AssemblyInfo.cs
index 3ef37da114c7..b01062116d4e 100644
--- a/sdk/src/Services/WorkSpacesWeb/Properties/AssemblyInfo.cs
+++ b/sdk/src/Services/WorkSpacesWeb/Properties/AssemblyInfo.cs
@@ -41,5 +41,9 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.301.4")]
\ No newline at end of file
+#if BCL
+[assembly: AssemblyVersion("4.0")]
+#else
+[assembly: AssemblyVersion("4.0.0.0")]
+#endif
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/src/Services/XRay/AWSSDK.XRay.NetFramework.csproj b/sdk/src/Services/XRay/AWSSDK.XRay.NetFramework.csproj
index c3059fedb5e1..71b9d2a08bfc 100644
--- a/sdk/src/Services/XRay/AWSSDK.XRay.NetFramework.csproj
+++ b/sdk/src/Services/XRay/AWSSDK.XRay.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);BCL;AWS_ASYNC_API;CODE_ANALYSIS</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(RuleSetFileForBuild)' == 'false' Or '$(RuleSetFileForBuild)' == '' ">
diff --git a/sdk/src/Services/XRay/AWSSDK.XRay.NetStandard.csproj b/sdk/src/Services/XRay/AWSSDK.XRay.NetStandard.csproj
index 71282d60a68f..f151ac58778c 100644
--- a/sdk/src/Services/XRay/AWSSDK.XRay.NetStandard.csproj
+++ b/sdk/src/Services/XRay/AWSSDK.XRay.NetStandard.csproj
@@ -22,6 +22,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <!-- Async Enumerable Compatibility -->
diff --git a/sdk/src/Services/XRay/Generated/AmazonXRayConfig.cs b/sdk/src/Services/XRay/Generated/AmazonXRayConfig.cs
index fcd61be0a1ac..fc3f9272aae5 100644
--- a/sdk/src/Services/XRay/Generated/AmazonXRayConfig.cs
+++ b/sdk/src/Services/XRay/Generated/AmazonXRayConfig.cs
@@ -34,7 +34,7 @@ namespace Amazon.XRay
     public partial class AmazonXRayConfig : ClientConfig
     {
         private static readonly string UserAgentString =
-            InternalSDKUtils.BuildUserAgentString("XRay", "3.7.300.84");
+            InternalSDKUtils.BuildUserAgentString("XRay", "4.0.0.0");
 
         private static readonly AmazonXRayEndpointResolver EndpointResolver =
             new AmazonXRayEndpointResolver();
diff --git a/sdk/src/Services/XRay/Properties/AssemblyInfo.cs b/sdk/src/Services/XRay/Properties/AssemblyInfo.cs
index fe864e739b2e..f43fe377e2a7 100644
--- a/sdk/src/Services/XRay/Properties/AssemblyInfo.cs
+++ b/sdk/src/Services/XRay/Properties/AssemblyInfo.cs
@@ -41,5 +41,9 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.7.300.84")]
\ No newline at end of file
+#if BCL
+[assembly: AssemblyVersion("4.0")]
+#else
+[assembly: AssemblyVersion("4.0.0.0")]
+#endif
+[assembly: AssemblyFileVersion("4.0.0.0")]
\ No newline at end of file
diff --git a/sdk/test/CSMTest/Tests/IntegrationTests/AWSSDK.CSM.IntegrationTests.NetFramework.csproj b/sdk/test/CSMTest/Tests/IntegrationTests/AWSSDK.CSM.IntegrationTests.NetFramework.csproj
index 8df4a5351371..22f3c2166778 100644
--- a/sdk/test/CSMTest/Tests/IntegrationTests/AWSSDK.CSM.IntegrationTests.NetFramework.csproj
+++ b/sdk/test/CSMTest/Tests/IntegrationTests/AWSSDK.CSM.IntegrationTests.NetFramework.csproj
@@ -1,6 +1,6 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DebugType>portable</DebugType>
     <DefineConstants>DEBUG;TRACE;BCL;AWS_ASYNC_API;CODE_ANALYSIS;LOCAL_FILE</DefineConstants>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
diff --git a/sdk/test/CSMTest/Tests/UnitTests/CSMUtilitiesTests/AWSSDK.CSMUtilitiesTests.NetFramework/AWSSDK.CSMUtilitiesTests.NetFramework.csproj b/sdk/test/CSMTest/Tests/UnitTests/CSMUtilitiesTests/AWSSDK.CSMUtilitiesTests.NetFramework/AWSSDK.CSMUtilitiesTests.NetFramework.csproj
index a1d27e1ed0f6..812f2f111000 100644
--- a/sdk/test/CSMTest/Tests/UnitTests/CSMUtilitiesTests/AWSSDK.CSMUtilitiesTests.NetFramework/AWSSDK.CSMUtilitiesTests.NetFramework.csproj
+++ b/sdk/test/CSMTest/Tests/UnitTests/CSMUtilitiesTests/AWSSDK.CSMUtilitiesTests.NetFramework/AWSSDK.CSMUtilitiesTests.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
   <PropertyGroup>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);DEBUG;TRACE;BCL;ASYNC_AWAIT;LOCAL_FILE</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
diff --git a/sdk/test/CSMTest/Tests/UnitTests/FallBackConfigTests/AWSSDK.AppConfigTests.NetFramework.csproj b/sdk/test/CSMTest/Tests/UnitTests/FallBackConfigTests/AWSSDK.AppConfigTests.NetFramework.csproj
index 5dfadf914861..84eab4c770b2 100644
--- a/sdk/test/CSMTest/Tests/UnitTests/FallBackConfigTests/AWSSDK.AppConfigTests.NetFramework.csproj
+++ b/sdk/test/CSMTest/Tests/UnitTests/FallBackConfigTests/AWSSDK.AppConfigTests.NetFramework.csproj
@@ -1,6 +1,6 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);DEBUG;TRACE;BCL;ASYNC_AWAIT;LOCAL_FILE</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
diff --git a/sdk/test/CSMTest/Tests/UnitTests/FallBackConfigTests/AWSSDK.EnvFallBackTests.NetFramework.csproj b/sdk/test/CSMTest/Tests/UnitTests/FallBackConfigTests/AWSSDK.EnvFallBackTests.NetFramework.csproj
index 3be33a371f90..7a7a6428fca4 100644
--- a/sdk/test/CSMTest/Tests/UnitTests/FallBackConfigTests/AWSSDK.EnvFallBackTests.NetFramework.csproj
+++ b/sdk/test/CSMTest/Tests/UnitTests/FallBackConfigTests/AWSSDK.EnvFallBackTests.NetFramework.csproj
@@ -1,6 +1,6 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);DEBUG;TRACE;BCL;ASYNC_AWAIT;LOCAL_FILE</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
diff --git a/sdk/test/CSMTest/Tests/UnitTests/FallBackConfigTests/AWSSDK.SharedProfileTests.NetFramework.csproj b/sdk/test/CSMTest/Tests/UnitTests/FallBackConfigTests/AWSSDK.SharedProfileTests.NetFramework.csproj
index fd1d7d47e0e5..dbd98bf93194 100644
--- a/sdk/test/CSMTest/Tests/UnitTests/FallBackConfigTests/AWSSDK.SharedProfileTests.NetFramework.csproj
+++ b/sdk/test/CSMTest/Tests/UnitTests/FallBackConfigTests/AWSSDK.SharedProfileTests.NetFramework.csproj
@@ -1,6 +1,6 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);DEBUG;TRACE;BCL;ASYNC_AWAIT;LOCAL_FILE</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
diff --git a/sdk/test/CSMTest/Utilities/AWSSDK.CSM.Utilities.NetFramework.csproj b/sdk/test/CSMTest/Utilities/AWSSDK.CSM.Utilities.NetFramework.csproj
index 96c2b7cd9899..72f0256514f3 100644
--- a/sdk/test/CSMTest/Utilities/AWSSDK.CSM.Utilities.NetFramework.csproj
+++ b/sdk/test/CSMTest/Utilities/AWSSDK.CSM.Utilities.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
   <PropertyGroup>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
   </PropertyGroup>
 
   <ItemGroup>
diff --git a/sdk/test/Common/AWSSDK.CommonTest.csproj b/sdk/test/Common/AWSSDK.CommonTest.csproj
index 3c25dffd4382..dbd85e4e95cb 100644
--- a/sdk/test/Common/AWSSDK.CommonTest.csproj
+++ b/sdk/test/Common/AWSSDK.CommonTest.csproj
@@ -1,6 +1,6 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>DEBUG;TRACE</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
diff --git a/sdk/test/IntegrationTests/AWSSDK.IntegrationTestUtilities.NetFramework.csproj b/sdk/test/IntegrationTests/AWSSDK.IntegrationTestUtilities.NetFramework.csproj
index d8952734c216..0a542d0ca812 100644
--- a/sdk/test/IntegrationTests/AWSSDK.IntegrationTestUtilities.NetFramework.csproj
+++ b/sdk/test/IntegrationTests/AWSSDK.IntegrationTestUtilities.NetFramework.csproj
@@ -1,12 +1,12 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);DEBUG;TRACE;BCL;LOCAL_FILE</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>false</GenerateDocumentationFile>
     <AssemblyName>AWSSDK.IntegrationTestUtilities.NetFramework</AssemblyName>
     <PackageId>AWSSDK.IntegrationTestUtilities.NetFramework</PackageId>
-    <BaseIntermediateOutputPath>./obj/net462</BaseIntermediateOutputPath>
+    <BaseIntermediateOutputPath>./obj/net472</BaseIntermediateOutputPath>
 
     <GenerateAssemblyTitleAttribute>false</GenerateAssemblyTitleAttribute>
     <GenerateAssemblyConfigurationAttribute>false</GenerateAssemblyConfigurationAttribute>
diff --git a/sdk/test/IntegrationTests/AWSSDK.IntegrationTests.NetFramework.csproj b/sdk/test/IntegrationTests/AWSSDK.IntegrationTests.NetFramework.csproj
index 4e29e1324cd1..4859b4fac649 100644
--- a/sdk/test/IntegrationTests/AWSSDK.IntegrationTests.NetFramework.csproj
+++ b/sdk/test/IntegrationTests/AWSSDK.IntegrationTests.NetFramework.csproj
@@ -1,6 +1,6 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);DEBUG;TRACE;BCL;ASYNC_AWAIT;LOCAL_FILE</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>false</GenerateDocumentationFile>
diff --git a/sdk/test/ProtocolTests/AWSSDK.ProtocolTests.NetFramework.csproj b/sdk/test/ProtocolTests/AWSSDK.ProtocolTests.NetFramework.csproj
index f84781ab4090..bc103b18b1c4 100644
--- a/sdk/test/ProtocolTests/AWSSDK.ProtocolTests.NetFramework.csproj
+++ b/sdk/test/ProtocolTests/AWSSDK.ProtocolTests.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
     <PropertyGroup>
      <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-      <TargetFramework>net462</TargetFramework>
+      <TargetFramework>net472</TargetFramework>
       <DefineConstants>$(DefineConstants);TRACE;BCL;ASYNC_AWAIT;DEBUG</DefineConstants>
       <DebugType>portable</DebugType>
       <GenerateDocumentationFile>true</GenerateDocumentationFile>
diff --git a/sdk/test/Services/ACMPCA/UnitTests/AWSSDK.UnitTests.ACMPCA.NetFramework.csproj b/sdk/test/Services/ACMPCA/UnitTests/AWSSDK.UnitTests.ACMPCA.NetFramework.csproj
index 4a51d9e6b65f..17602eea2bfc 100644
--- a/sdk/test/Services/ACMPCA/UnitTests/AWSSDK.UnitTests.ACMPCA.NetFramework.csproj
+++ b/sdk/test/Services/ACMPCA/UnitTests/AWSSDK.UnitTests.ACMPCA.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);TRACE;BCL;ASYNC_AWAIT;DEBUG</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CS1591,CS0612,CS0618</NoWarn>
   </PropertyGroup>
   <ItemGroup>
diff --git a/sdk/test/Services/APIGateway/IntegrationTests/AWSSDK.IntegrationTests.APIGateway.NetFramework.csproj b/sdk/test/Services/APIGateway/IntegrationTests/AWSSDK.IntegrationTests.APIGateway.NetFramework.csproj
index ff078347b8aa..e319dcb73d95 100644
--- a/sdk/test/Services/APIGateway/IntegrationTests/AWSSDK.IntegrationTests.APIGateway.NetFramework.csproj
+++ b/sdk/test/Services/APIGateway/IntegrationTests/AWSSDK.IntegrationTests.APIGateway.NetFramework.csproj
@@ -1,6 +1,6 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);DEBUG;TRACE;BCL;ASYNC_AWAIT;LOCAL_FILE</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>false</GenerateDocumentationFile>
diff --git a/sdk/test/Services/APIGateway/UnitTests/AWSSDK.UnitTests.APIGateway.NetFramework.csproj b/sdk/test/Services/APIGateway/UnitTests/AWSSDK.UnitTests.APIGateway.NetFramework.csproj
index 2fb38570d213..dbbe2992cd04 100644
--- a/sdk/test/Services/APIGateway/UnitTests/AWSSDK.UnitTests.APIGateway.NetFramework.csproj
+++ b/sdk/test/Services/APIGateway/UnitTests/AWSSDK.UnitTests.APIGateway.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);TRACE;BCL;ASYNC_AWAIT;DEBUG</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CS1591,CS0612,CS0618</NoWarn>
   </PropertyGroup>
   <ItemGroup>
diff --git a/sdk/test/Services/ARCZonalShift/UnitTests/AWSSDK.UnitTests.ARCZonalShift.NetFramework.csproj b/sdk/test/Services/ARCZonalShift/UnitTests/AWSSDK.UnitTests.ARCZonalShift.NetFramework.csproj
index 9568d6c190d1..2c66130f67bb 100644
--- a/sdk/test/Services/ARCZonalShift/UnitTests/AWSSDK.UnitTests.ARCZonalShift.NetFramework.csproj
+++ b/sdk/test/Services/ARCZonalShift/UnitTests/AWSSDK.UnitTests.ARCZonalShift.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);TRACE;BCL;ASYNC_AWAIT;DEBUG</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CS1591,CS0612,CS0618</NoWarn>
   </PropertyGroup>
   <ItemGroup>
diff --git a/sdk/test/Services/AWSHealth/UnitTests/AWSSDK.UnitTests.AWSHealth.NetFramework.csproj b/sdk/test/Services/AWSHealth/UnitTests/AWSSDK.UnitTests.AWSHealth.NetFramework.csproj
index 7671e0d57c11..3b03e1e268b1 100644
--- a/sdk/test/Services/AWSHealth/UnitTests/AWSSDK.UnitTests.AWSHealth.NetFramework.csproj
+++ b/sdk/test/Services/AWSHealth/UnitTests/AWSSDK.UnitTests.AWSHealth.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);TRACE;BCL;ASYNC_AWAIT;DEBUG</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CS1591,CS0612,CS0618</NoWarn>
   </PropertyGroup>
   <ItemGroup>
diff --git a/sdk/test/Services/AWSMarketplaceCommerceAnalytics/IntegrationTests/AWSSDK.IntegrationTests.AWSMarketplaceCommerceAnalytics.NetFramework.csproj b/sdk/test/Services/AWSMarketplaceCommerceAnalytics/IntegrationTests/AWSSDK.IntegrationTests.AWSMarketplaceCommerceAnalytics.NetFramework.csproj
index 830e12dd78be..bffc186c8826 100644
--- a/sdk/test/Services/AWSMarketplaceCommerceAnalytics/IntegrationTests/AWSSDK.IntegrationTests.AWSMarketplaceCommerceAnalytics.NetFramework.csproj
+++ b/sdk/test/Services/AWSMarketplaceCommerceAnalytics/IntegrationTests/AWSSDK.IntegrationTests.AWSMarketplaceCommerceAnalytics.NetFramework.csproj
@@ -1,6 +1,6 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);DEBUG;TRACE;BCL;ASYNC_AWAIT;LOCAL_FILE</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>false</GenerateDocumentationFile>
diff --git a/sdk/test/Services/AWSMarketplaceCommerceAnalytics/UnitTests/AWSSDK.UnitTests.AWSMarketplaceCommerceAnalytics.NetFramework.csproj b/sdk/test/Services/AWSMarketplaceCommerceAnalytics/UnitTests/AWSSDK.UnitTests.AWSMarketplaceCommerceAnalytics.NetFramework.csproj
index 58c0f4b84ae1..cd57e5ecb449 100644
--- a/sdk/test/Services/AWSMarketplaceCommerceAnalytics/UnitTests/AWSSDK.UnitTests.AWSMarketplaceCommerceAnalytics.NetFramework.csproj
+++ b/sdk/test/Services/AWSMarketplaceCommerceAnalytics/UnitTests/AWSSDK.UnitTests.AWSMarketplaceCommerceAnalytics.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);TRACE;BCL;ASYNC_AWAIT;DEBUG</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CS1591,CS0612,CS0618</NoWarn>
   </PropertyGroup>
   <ItemGroup>
diff --git a/sdk/test/Services/AWSMarketplaceMetering/UnitTests/AWSSDK.UnitTests.AWSMarketplaceMetering.NetFramework.csproj b/sdk/test/Services/AWSMarketplaceMetering/UnitTests/AWSSDK.UnitTests.AWSMarketplaceMetering.NetFramework.csproj
index f1abecd4fccc..6d7e2961cc2a 100644
--- a/sdk/test/Services/AWSMarketplaceMetering/UnitTests/AWSSDK.UnitTests.AWSMarketplaceMetering.NetFramework.csproj
+++ b/sdk/test/Services/AWSMarketplaceMetering/UnitTests/AWSSDK.UnitTests.AWSMarketplaceMetering.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);TRACE;BCL;ASYNC_AWAIT;DEBUG</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CS1591,CS0612,CS0618</NoWarn>
   </PropertyGroup>
   <ItemGroup>
diff --git a/sdk/test/Services/AWSSupport/IntegrationTests/AWSSDK.IntegrationTests.AWSSupport.NetFramework.csproj b/sdk/test/Services/AWSSupport/IntegrationTests/AWSSDK.IntegrationTests.AWSSupport.NetFramework.csproj
index 04aedc1d9040..4bd34751690b 100644
--- a/sdk/test/Services/AWSSupport/IntegrationTests/AWSSDK.IntegrationTests.AWSSupport.NetFramework.csproj
+++ b/sdk/test/Services/AWSSupport/IntegrationTests/AWSSDK.IntegrationTests.AWSSupport.NetFramework.csproj
@@ -1,6 +1,6 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);DEBUG;TRACE;BCL;ASYNC_AWAIT;LOCAL_FILE</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>false</GenerateDocumentationFile>
diff --git a/sdk/test/Services/AWSSupport/UnitTests/AWSSDK.UnitTests.AWSSupport.NetFramework.csproj b/sdk/test/Services/AWSSupport/UnitTests/AWSSDK.UnitTests.AWSSupport.NetFramework.csproj
index e56e4f06989f..85a5bfa43b32 100644
--- a/sdk/test/Services/AWSSupport/UnitTests/AWSSDK.UnitTests.AWSSupport.NetFramework.csproj
+++ b/sdk/test/Services/AWSSupport/UnitTests/AWSSDK.UnitTests.AWSSupport.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);TRACE;BCL;ASYNC_AWAIT;DEBUG</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CS1591,CS0612,CS0618</NoWarn>
   </PropertyGroup>
   <ItemGroup>
diff --git a/sdk/test/Services/AccessAnalyzer/UnitTests/AWSSDK.UnitTests.AccessAnalyzer.NetFramework.csproj b/sdk/test/Services/AccessAnalyzer/UnitTests/AWSSDK.UnitTests.AccessAnalyzer.NetFramework.csproj
index 0e8606d60a2e..691e12db90b2 100644
--- a/sdk/test/Services/AccessAnalyzer/UnitTests/AWSSDK.UnitTests.AccessAnalyzer.NetFramework.csproj
+++ b/sdk/test/Services/AccessAnalyzer/UnitTests/AWSSDK.UnitTests.AccessAnalyzer.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);TRACE;BCL;ASYNC_AWAIT;DEBUG</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CS1591,CS0612,CS0618</NoWarn>
   </PropertyGroup>
   <ItemGroup>
diff --git a/sdk/test/Services/Account/UnitTests/AWSSDK.UnitTests.Account.NetFramework.csproj b/sdk/test/Services/Account/UnitTests/AWSSDK.UnitTests.Account.NetFramework.csproj
index c002759e7be9..b29ba1d62adb 100644
--- a/sdk/test/Services/Account/UnitTests/AWSSDK.UnitTests.Account.NetFramework.csproj
+++ b/sdk/test/Services/Account/UnitTests/AWSSDK.UnitTests.Account.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);TRACE;BCL;ASYNC_AWAIT;DEBUG</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CS1591,CS0612,CS0618</NoWarn>
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   <ItemGroup>
diff --git a/sdk/test/Services/AlexaForBusiness/UnitTests/AWSSDK.UnitTests.AlexaForBusiness.NetFramework.csproj b/sdk/test/Services/AlexaForBusiness/UnitTests/AWSSDK.UnitTests.AlexaForBusiness.NetFramework.csproj
index 6784a145b35e..0a78e3a8d934 100644
--- a/sdk/test/Services/AlexaForBusiness/UnitTests/AWSSDK.UnitTests.AlexaForBusiness.NetFramework.csproj
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@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);TRACE;BCL;ASYNC_AWAIT;DEBUG</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
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diff --git a/sdk/test/Services/Amplify/UnitTests/AWSSDK.UnitTests.Amplify.NetFramework.csproj b/sdk/test/Services/Amplify/UnitTests/AWSSDK.UnitTests.Amplify.NetFramework.csproj
index c2b78a597fd9..ebc2e3173770 100644
--- a/sdk/test/Services/Amplify/UnitTests/AWSSDK.UnitTests.Amplify.NetFramework.csproj
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@@ -1,7 +1,7 @@
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    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
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     <DefineConstants>$(DefineConstants);TRACE;BCL;ASYNC_AWAIT;DEBUG</DefineConstants>
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     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
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     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CS1591,CS0612,CS0618</NoWarn>
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diff --git a/sdk/test/Services/AmplifyBackend/UnitTests/AWSSDK.UnitTests.AmplifyBackend.NetFramework.csproj b/sdk/test/Services/AmplifyBackend/UnitTests/AWSSDK.UnitTests.AmplifyBackend.NetFramework.csproj
index a00f2c8625c4..0bb19c7a8023 100644
--- a/sdk/test/Services/AmplifyBackend/UnitTests/AWSSDK.UnitTests.AmplifyBackend.NetFramework.csproj
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@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
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     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
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+    <LangVersion>9.0</LangVersion>
     <NoWarn>CS1591,CS0612,CS0618</NoWarn>
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diff --git a/sdk/test/Services/AmplifyUIBuilder/UnitTests/AWSSDK.UnitTests.AmplifyUIBuilder.NetFramework.csproj b/sdk/test/Services/AmplifyUIBuilder/UnitTests/AWSSDK.UnitTests.AmplifyUIBuilder.NetFramework.csproj
index 438456708792..34eae19fd9d7 100644
--- a/sdk/test/Services/AmplifyUIBuilder/UnitTests/AWSSDK.UnitTests.AmplifyUIBuilder.NetFramework.csproj
+++ b/sdk/test/Services/AmplifyUIBuilder/UnitTests/AWSSDK.UnitTests.AmplifyUIBuilder.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
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    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
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     <DebugType>portable</DebugType>
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@@ -19,6 +19,7 @@
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+    <LangVersion>9.0</LangVersion>
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diff --git a/sdk/test/Services/ApiGatewayManagementApi/UnitTests/AWSSDK.UnitTests.ApiGatewayManagementApi.NetFramework.csproj b/sdk/test/Services/ApiGatewayManagementApi/UnitTests/AWSSDK.UnitTests.ApiGatewayManagementApi.NetFramework.csproj
index f330867c7126..0b4536e41fd4 100644
--- a/sdk/test/Services/ApiGatewayManagementApi/UnitTests/AWSSDK.UnitTests.ApiGatewayManagementApi.NetFramework.csproj
+++ b/sdk/test/Services/ApiGatewayManagementApi/UnitTests/AWSSDK.UnitTests.ApiGatewayManagementApi.NetFramework.csproj
@@ -1,7 +1,7 @@
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    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
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@@ -19,6 +19,7 @@
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+    <LangVersion>9.0</LangVersion>
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diff --git a/sdk/test/Services/ApiGatewayV2/UnitTests/AWSSDK.UnitTests.ApiGatewayV2.NetFramework.csproj b/sdk/test/Services/ApiGatewayV2/UnitTests/AWSSDK.UnitTests.ApiGatewayV2.NetFramework.csproj
index 61b5b370be05..b6f34bdd9646 100644
--- a/sdk/test/Services/ApiGatewayV2/UnitTests/AWSSDK.UnitTests.ApiGatewayV2.NetFramework.csproj
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@@ -1,7 +1,7 @@
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    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
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@@ -19,6 +19,7 @@
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+    <LangVersion>9.0</LangVersion>
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diff --git a/sdk/test/Services/AppConfig/UnitTests/AWSSDK.UnitTests.AppConfig.NetFramework.csproj b/sdk/test/Services/AppConfig/UnitTests/AWSSDK.UnitTests.AppConfig.NetFramework.csproj
index 723d19be98f6..2f24a24b846d 100644
--- a/sdk/test/Services/AppConfig/UnitTests/AWSSDK.UnitTests.AppConfig.NetFramework.csproj
+++ b/sdk/test/Services/AppConfig/UnitTests/AWSSDK.UnitTests.AppConfig.NetFramework.csproj
@@ -1,7 +1,7 @@
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diff --git a/sdk/test/Services/AppConfigData/UnitTests/AWSSDK.UnitTests.AppConfigData.NetFramework.csproj b/sdk/test/Services/AppConfigData/UnitTests/AWSSDK.UnitTests.AppConfigData.NetFramework.csproj
index acb9a88c3f6e..c777f5af6888 100644
--- a/sdk/test/Services/AppConfigData/UnitTests/AWSSDK.UnitTests.AppConfigData.NetFramework.csproj
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diff --git a/sdk/test/Services/AppFabric/UnitTests/AWSSDK.UnitTests.AppFabric.NetFramework.csproj b/sdk/test/Services/AppFabric/UnitTests/AWSSDK.UnitTests.AppFabric.NetFramework.csproj
index 9919671c9302..bb3eb98f30c1 100644
--- a/sdk/test/Services/AppFabric/UnitTests/AWSSDK.UnitTests.AppFabric.NetFramework.csproj
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@@ -1,7 +1,7 @@
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@@ -19,6 +19,7 @@
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+    <LangVersion>9.0</LangVersion>
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diff --git a/sdk/test/Services/AppIntegrationsService/UnitTests/AWSSDK.UnitTests.AppIntegrationsService.NetFramework.csproj b/sdk/test/Services/AppIntegrationsService/UnitTests/AWSSDK.UnitTests.AppIntegrationsService.NetFramework.csproj
index 2cced97f67a6..76b2e5922af5 100644
--- a/sdk/test/Services/AppIntegrationsService/UnitTests/AWSSDK.UnitTests.AppIntegrationsService.NetFramework.csproj
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@@ -19,6 +19,7 @@
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diff --git a/sdk/test/Services/AppMesh/UnitTests/AWSSDK.UnitTests.AppMesh.NetFramework.csproj b/sdk/test/Services/AppMesh/UnitTests/AWSSDK.UnitTests.AppMesh.NetFramework.csproj
index d2df57b1f028..ae753a6d7a65 100644
--- a/sdk/test/Services/AppMesh/UnitTests/AWSSDK.UnitTests.AppMesh.NetFramework.csproj
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@@ -19,6 +19,7 @@
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+    <LangVersion>9.0</LangVersion>
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diff --git a/sdk/test/Services/AppRegistry/UnitTests/AWSSDK.UnitTests.AppRegistry.NetFramework.csproj b/sdk/test/Services/AppRegistry/UnitTests/AWSSDK.UnitTests.AppRegistry.NetFramework.csproj
index d2d108a4be3b..43eead6d17f1 100644
--- a/sdk/test/Services/AppRegistry/UnitTests/AWSSDK.UnitTests.AppRegistry.NetFramework.csproj
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+    <LangVersion>9.0</LangVersion>
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diff --git a/sdk/test/Services/AppRunner/UnitTests/AWSSDK.UnitTests.AppRunner.NetFramework.csproj b/sdk/test/Services/AppRunner/UnitTests/AWSSDK.UnitTests.AppRunner.NetFramework.csproj
index 69b871ecb408..8cb3336789bc 100644
--- a/sdk/test/Services/AppRunner/UnitTests/AWSSDK.UnitTests.AppRunner.NetFramework.csproj
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+    <LangVersion>9.0</LangVersion>
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diff --git a/sdk/test/Services/AppStream/UnitTests/AWSSDK.UnitTests.AppStream.NetFramework.csproj b/sdk/test/Services/AppStream/UnitTests/AWSSDK.UnitTests.AppStream.NetFramework.csproj
index 37db139007a4..394b50044794 100644
--- a/sdk/test/Services/AppStream/UnitTests/AWSSDK.UnitTests.AppStream.NetFramework.csproj
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@@ -1,7 +1,7 @@
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@@ -19,6 +19,7 @@
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+    <LangVersion>9.0</LangVersion>
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diff --git a/sdk/test/Services/AppSync/UnitTests/AWSSDK.UnitTests.AppSync.NetFramework.csproj b/sdk/test/Services/AppSync/UnitTests/AWSSDK.UnitTests.AppSync.NetFramework.csproj
index c0be73d0f6bb..15e0223f866e 100644
--- a/sdk/test/Services/AppSync/UnitTests/AWSSDK.UnitTests.AppSync.NetFramework.csproj
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@@ -1,7 +1,7 @@
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@@ -19,6 +19,7 @@
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+    <LangVersion>9.0</LangVersion>
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diff --git a/sdk/test/Services/Appflow/UnitTests/AWSSDK.UnitTests.Appflow.NetFramework.csproj b/sdk/test/Services/Appflow/UnitTests/AWSSDK.UnitTests.Appflow.NetFramework.csproj
index af1493d0c6eb..f7fd833d9ca1 100644
--- a/sdk/test/Services/Appflow/UnitTests/AWSSDK.UnitTests.Appflow.NetFramework.csproj
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@@ -1,7 +1,7 @@
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@@ -19,6 +19,7 @@
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+    <LangVersion>9.0</LangVersion>
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diff --git a/sdk/test/Services/ApplicationAutoScaling/UnitTests/AWSSDK.UnitTests.ApplicationAutoScaling.NetFramework.csproj b/sdk/test/Services/ApplicationAutoScaling/UnitTests/AWSSDK.UnitTests.ApplicationAutoScaling.NetFramework.csproj
index 478aeefda13c..8fc1a52d1001 100644
--- a/sdk/test/Services/ApplicationAutoScaling/UnitTests/AWSSDK.UnitTests.ApplicationAutoScaling.NetFramework.csproj
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@@ -1,7 +1,7 @@
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@@ -19,6 +19,7 @@
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+    <LangVersion>9.0</LangVersion>
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diff --git a/sdk/test/Services/ApplicationCostProfiler/UnitTests/AWSSDK.UnitTests.ApplicationCostProfiler.NetFramework.csproj b/sdk/test/Services/ApplicationCostProfiler/UnitTests/AWSSDK.UnitTests.ApplicationCostProfiler.NetFramework.csproj
index eb8ed91b67b3..060188b92048 100644
--- a/sdk/test/Services/ApplicationCostProfiler/UnitTests/AWSSDK.UnitTests.ApplicationCostProfiler.NetFramework.csproj
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@@ -1,7 +1,7 @@
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@@ -19,6 +19,7 @@
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diff --git a/sdk/test/Services/ApplicationDiscoveryService/IntegrationTests/AWSSDK.IntegrationTests.ApplicationDiscoveryService.NetFramework.csproj b/sdk/test/Services/ApplicationDiscoveryService/IntegrationTests/AWSSDK.IntegrationTests.ApplicationDiscoveryService.NetFramework.csproj
index 2dcccdbdece0..f478313d2757 100644
--- a/sdk/test/Services/ApplicationDiscoveryService/IntegrationTests/AWSSDK.IntegrationTests.ApplicationDiscoveryService.NetFramework.csproj
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@@ -1,6 +1,6 @@
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diff --git a/sdk/test/Services/ApplicationDiscoveryService/UnitTests/AWSSDK.UnitTests.ApplicationDiscoveryService.NetFramework.csproj b/sdk/test/Services/ApplicationDiscoveryService/UnitTests/AWSSDK.UnitTests.ApplicationDiscoveryService.NetFramework.csproj
index 6b6bdfd736b4..0aae3bb9db0b 100644
--- a/sdk/test/Services/ApplicationDiscoveryService/UnitTests/AWSSDK.UnitTests.ApplicationDiscoveryService.NetFramework.csproj
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@@ -1,7 +1,7 @@
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     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CS1591,CS0612,CS0618</NoWarn>
   </PropertyGroup>
   <ItemGroup>
diff --git a/sdk/test/Services/ApplicationInsights/UnitTests/AWSSDK.UnitTests.ApplicationInsights.NetFramework.csproj b/sdk/test/Services/ApplicationInsights/UnitTests/AWSSDK.UnitTests.ApplicationInsights.NetFramework.csproj
index 22d369d5ebfc..4cf0dd01bcd3 100644
--- a/sdk/test/Services/ApplicationInsights/UnitTests/AWSSDK.UnitTests.ApplicationInsights.NetFramework.csproj
+++ b/sdk/test/Services/ApplicationInsights/UnitTests/AWSSDK.UnitTests.ApplicationInsights.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);TRACE;BCL;ASYNC_AWAIT;DEBUG</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CS1591,CS0612,CS0618</NoWarn>
   </PropertyGroup>
   <ItemGroup>
diff --git a/sdk/test/Services/Artifact/UnitTests/AWSSDK.UnitTests.Artifact.NetFramework.csproj b/sdk/test/Services/Artifact/UnitTests/AWSSDK.UnitTests.Artifact.NetFramework.csproj
index f88bd73c0068..c6f780451116 100644
--- a/sdk/test/Services/Artifact/UnitTests/AWSSDK.UnitTests.Artifact.NetFramework.csproj
+++ b/sdk/test/Services/Artifact/UnitTests/AWSSDK.UnitTests.Artifact.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);TRACE;BCL;ASYNC_AWAIT;DEBUG</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CS1591,CS0612,CS0618</NoWarn>
   </PropertyGroup>
   <ItemGroup>
diff --git a/sdk/test/Services/Athena/UnitTests/AWSSDK.UnitTests.Athena.NetFramework.csproj b/sdk/test/Services/Athena/UnitTests/AWSSDK.UnitTests.Athena.NetFramework.csproj
index 4859ce019ac3..9ae95a5598a3 100644
--- a/sdk/test/Services/Athena/UnitTests/AWSSDK.UnitTests.Athena.NetFramework.csproj
+++ b/sdk/test/Services/Athena/UnitTests/AWSSDK.UnitTests.Athena.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);TRACE;BCL;ASYNC_AWAIT;DEBUG</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CS1591,CS0612,CS0618</NoWarn>
   </PropertyGroup>
   <ItemGroup>
diff --git a/sdk/test/Services/AuditManager/UnitTests/AWSSDK.UnitTests.AuditManager.NetFramework.csproj b/sdk/test/Services/AuditManager/UnitTests/AWSSDK.UnitTests.AuditManager.NetFramework.csproj
index 8abd7a2856af..b39a7f645547 100644
--- a/sdk/test/Services/AuditManager/UnitTests/AWSSDK.UnitTests.AuditManager.NetFramework.csproj
+++ b/sdk/test/Services/AuditManager/UnitTests/AWSSDK.UnitTests.AuditManager.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);TRACE;BCL;ASYNC_AWAIT;DEBUG</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CS1591,CS0612,CS0618</NoWarn>
   </PropertyGroup>
   <ItemGroup>
diff --git a/sdk/test/Services/AugmentedAIRuntime/UnitTests/AWSSDK.UnitTests.AugmentedAIRuntime.NetFramework.csproj b/sdk/test/Services/AugmentedAIRuntime/UnitTests/AWSSDK.UnitTests.AugmentedAIRuntime.NetFramework.csproj
index 401234d04ed1..39016533c798 100644
--- a/sdk/test/Services/AugmentedAIRuntime/UnitTests/AWSSDK.UnitTests.AugmentedAIRuntime.NetFramework.csproj
+++ b/sdk/test/Services/AugmentedAIRuntime/UnitTests/AWSSDK.UnitTests.AugmentedAIRuntime.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);TRACE;BCL;ASYNC_AWAIT;DEBUG</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CS1591,CS0612,CS0618</NoWarn>
   </PropertyGroup>
   <ItemGroup>
diff --git a/sdk/test/Services/AutoScaling/IntegrationTests/AWSSDK.IntegrationTests.AutoScaling.NetFramework.csproj b/sdk/test/Services/AutoScaling/IntegrationTests/AWSSDK.IntegrationTests.AutoScaling.NetFramework.csproj
index bd4b619b326f..cdf9fe61909e 100644
--- a/sdk/test/Services/AutoScaling/IntegrationTests/AWSSDK.IntegrationTests.AutoScaling.NetFramework.csproj
+++ b/sdk/test/Services/AutoScaling/IntegrationTests/AWSSDK.IntegrationTests.AutoScaling.NetFramework.csproj
@@ -1,6 +1,6 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);DEBUG;TRACE;BCL;ASYNC_AWAIT;LOCAL_FILE</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>false</GenerateDocumentationFile>
diff --git a/sdk/test/Services/AutoScaling/UnitTests/AWSSDK.UnitTests.AutoScaling.NetFramework.csproj b/sdk/test/Services/AutoScaling/UnitTests/AWSSDK.UnitTests.AutoScaling.NetFramework.csproj
index 8ff3f09e7e78..24dd45acd742 100644
--- a/sdk/test/Services/AutoScaling/UnitTests/AWSSDK.UnitTests.AutoScaling.NetFramework.csproj
+++ b/sdk/test/Services/AutoScaling/UnitTests/AWSSDK.UnitTests.AutoScaling.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);TRACE;BCL;ASYNC_AWAIT;DEBUG</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CS1591,CS0612,CS0618</NoWarn>
   </PropertyGroup>
   <ItemGroup>
diff --git a/sdk/test/Services/AutoScalingPlans/UnitTests/AWSSDK.UnitTests.AutoScalingPlans.NetFramework.csproj b/sdk/test/Services/AutoScalingPlans/UnitTests/AWSSDK.UnitTests.AutoScalingPlans.NetFramework.csproj
index b454619643de..6fa6095a9a54 100644
--- a/sdk/test/Services/AutoScalingPlans/UnitTests/AWSSDK.UnitTests.AutoScalingPlans.NetFramework.csproj
+++ b/sdk/test/Services/AutoScalingPlans/UnitTests/AWSSDK.UnitTests.AutoScalingPlans.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);TRACE;BCL;ASYNC_AWAIT;DEBUG</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CS1591,CS0612,CS0618</NoWarn>
   </PropertyGroup>
   <ItemGroup>
diff --git a/sdk/test/Services/B2bi/UnitTests/AWSSDK.UnitTests.B2bi.NetFramework.csproj b/sdk/test/Services/B2bi/UnitTests/AWSSDK.UnitTests.B2bi.NetFramework.csproj
index a2797c00a483..b3fed5741066 100644
--- a/sdk/test/Services/B2bi/UnitTests/AWSSDK.UnitTests.B2bi.NetFramework.csproj
+++ b/sdk/test/Services/B2bi/UnitTests/AWSSDK.UnitTests.B2bi.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);TRACE;BCL;ASYNC_AWAIT;DEBUG</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CS1591,CS0612,CS0618</NoWarn>
   </PropertyGroup>
   <ItemGroup>
diff --git a/sdk/test/Services/BCMDataExports/UnitTests/AWSSDK.UnitTests.BCMDataExports.NetFramework.csproj b/sdk/test/Services/BCMDataExports/UnitTests/AWSSDK.UnitTests.BCMDataExports.NetFramework.csproj
index 074b44581762..f383b940df9f 100644
--- a/sdk/test/Services/BCMDataExports/UnitTests/AWSSDK.UnitTests.BCMDataExports.NetFramework.csproj
+++ b/sdk/test/Services/BCMDataExports/UnitTests/AWSSDK.UnitTests.BCMDataExports.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);TRACE;BCL;ASYNC_AWAIT;DEBUG</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CS1591,CS0612,CS0618</NoWarn>
   </PropertyGroup>
   <ItemGroup>
diff --git a/sdk/test/Services/Backup/UnitTests/AWSSDK.UnitTests.Backup.NetFramework.csproj b/sdk/test/Services/Backup/UnitTests/AWSSDK.UnitTests.Backup.NetFramework.csproj
index b33b24e3f89b..814003d63924 100644
--- a/sdk/test/Services/Backup/UnitTests/AWSSDK.UnitTests.Backup.NetFramework.csproj
+++ b/sdk/test/Services/Backup/UnitTests/AWSSDK.UnitTests.Backup.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);TRACE;BCL;ASYNC_AWAIT;DEBUG</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CS1591,CS0612,CS0618</NoWarn>
   </PropertyGroup>
   <ItemGroup>
diff --git a/sdk/test/Services/BackupGateway/UnitTests/AWSSDK.UnitTests.BackupGateway.NetFramework.csproj b/sdk/test/Services/BackupGateway/UnitTests/AWSSDK.UnitTests.BackupGateway.NetFramework.csproj
index bfdd6ceee3de..c12f8d71a269 100644
--- a/sdk/test/Services/BackupGateway/UnitTests/AWSSDK.UnitTests.BackupGateway.NetFramework.csproj
+++ b/sdk/test/Services/BackupGateway/UnitTests/AWSSDK.UnitTests.BackupGateway.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);TRACE;BCL;ASYNC_AWAIT;DEBUG</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CS1591,CS0612,CS0618</NoWarn>
   </PropertyGroup>
   <ItemGroup>
diff --git a/sdk/test/Services/BackupStorage/UnitTests/AWSSDK.UnitTests.BackupStorage.NetFramework.csproj b/sdk/test/Services/BackupStorage/UnitTests/AWSSDK.UnitTests.BackupStorage.NetFramework.csproj
index c1eacf3561aa..33f72b387d17 100644
--- a/sdk/test/Services/BackupStorage/UnitTests/AWSSDK.UnitTests.BackupStorage.NetFramework.csproj
+++ b/sdk/test/Services/BackupStorage/UnitTests/AWSSDK.UnitTests.BackupStorage.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);TRACE;BCL;ASYNC_AWAIT;DEBUG</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CS1591,CS0612,CS0618</NoWarn>
   </PropertyGroup>
   <ItemGroup>
diff --git a/sdk/test/Services/Batch/UnitTests/AWSSDK.UnitTests.Batch.NetFramework.csproj b/sdk/test/Services/Batch/UnitTests/AWSSDK.UnitTests.Batch.NetFramework.csproj
index c4abbf81205c..24d21e917d0c 100644
--- a/sdk/test/Services/Batch/UnitTests/AWSSDK.UnitTests.Batch.NetFramework.csproj
+++ b/sdk/test/Services/Batch/UnitTests/AWSSDK.UnitTests.Batch.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);TRACE;BCL;ASYNC_AWAIT;DEBUG</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CS1591,CS0612,CS0618</NoWarn>
   </PropertyGroup>
   <ItemGroup>
diff --git a/sdk/test/Services/BearerTokenAuthTest/AWSSDK.BearerTokenAuthTest.NetFramework.csproj b/sdk/test/Services/BearerTokenAuthTest/AWSSDK.BearerTokenAuthTest.NetFramework.csproj
index 79277f9c1dbb..b575e014178f 100644
--- a/sdk/test/Services/BearerTokenAuthTest/AWSSDK.BearerTokenAuthTest.NetFramework.csproj
+++ b/sdk/test/Services/BearerTokenAuthTest/AWSSDK.BearerTokenAuthTest.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);BCL;AWS_ASYNC_API;CODE_ANALYSIS</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(RuleSetFileForBuild)' == 'false' Or '$(RuleSetFileForBuild)' == '' ">
diff --git a/sdk/test/Services/BearerTokenAuthTest/AWSSDK.BearerTokenAuthTest.NetStandard.csproj b/sdk/test/Services/BearerTokenAuthTest/AWSSDK.BearerTokenAuthTest.NetStandard.csproj
index 97afaa7463b7..fee7b57bdcd5 100644
--- a/sdk/test/Services/BearerTokenAuthTest/AWSSDK.BearerTokenAuthTest.NetStandard.csproj
+++ b/sdk/test/Services/BearerTokenAuthTest/AWSSDK.BearerTokenAuthTest.NetStandard.csproj
@@ -22,6 +22,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <!-- Async Enumerable Compatibility -->
diff --git a/sdk/test/Services/BearerTokenAuthTest/Generated/AmazonBearerTokenAuthTestConfig.cs b/sdk/test/Services/BearerTokenAuthTest/Generated/AmazonBearerTokenAuthTestConfig.cs
index 9e55c552da48..f3a1b12d5790 100644
--- a/sdk/test/Services/BearerTokenAuthTest/Generated/AmazonBearerTokenAuthTestConfig.cs
+++ b/sdk/test/Services/BearerTokenAuthTest/Generated/AmazonBearerTokenAuthTestConfig.cs
@@ -34,7 +34,7 @@ namespace Amazon.BearerTokenAuthTest
     public partial class AmazonBearerTokenAuthTestConfig : ClientConfig
     {
         private static readonly string UserAgentString =
-            InternalSDKUtils.BuildUserAgentString("Bearer-Token-Auth-Test", "3.3");
+            InternalSDKUtils.BuildUserAgentString("Bearer-Token-Auth-Test", "4.0");
 
 
         private string _userAgent = UserAgentString;
diff --git a/sdk/test/Services/BearerTokenAuthTest/Properties/AssemblyInfo.cs b/sdk/test/Services/BearerTokenAuthTest/Properties/AssemblyInfo.cs
index 01d10802dc8b..a13bf677cd66 100644
--- a/sdk/test/Services/BearerTokenAuthTest/Properties/AssemblyInfo.cs
+++ b/sdk/test/Services/BearerTokenAuthTest/Properties/AssemblyInfo.cs
@@ -41,5 +41,9 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.3")]
\ No newline at end of file
+#if BCL
+[assembly: AssemblyVersion("4.0")]
+#else
+[assembly: AssemblyVersion("4.0")]
+#endif
+[assembly: AssemblyFileVersion("4.0")]
\ No newline at end of file
diff --git a/sdk/test/Services/BearerTokenAuthTest/UnitTests/AWSSDK.UnitTests.BearerTokenAuthTest.NetFramework.csproj b/sdk/test/Services/BearerTokenAuthTest/UnitTests/AWSSDK.UnitTests.BearerTokenAuthTest.NetFramework.csproj
index 4a78dadeff98..87a64c30d287 100644
--- a/sdk/test/Services/BearerTokenAuthTest/UnitTests/AWSSDK.UnitTests.BearerTokenAuthTest.NetFramework.csproj
+++ b/sdk/test/Services/BearerTokenAuthTest/UnitTests/AWSSDK.UnitTests.BearerTokenAuthTest.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);TRACE;BCL;ASYNC_AWAIT;DEBUG</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CS1591,CS0612,CS0618</NoWarn>
   </PropertyGroup>
   <ItemGroup>
diff --git a/sdk/test/Services/Bedrock/UnitTests/AWSSDK.UnitTests.Bedrock.NetFramework.csproj b/sdk/test/Services/Bedrock/UnitTests/AWSSDK.UnitTests.Bedrock.NetFramework.csproj
index f6c8b0a9ab7e..6347024397c9 100644
--- a/sdk/test/Services/Bedrock/UnitTests/AWSSDK.UnitTests.Bedrock.NetFramework.csproj
+++ b/sdk/test/Services/Bedrock/UnitTests/AWSSDK.UnitTests.Bedrock.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);TRACE;BCL;ASYNC_AWAIT;DEBUG</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CS1591,CS0612,CS0618</NoWarn>
   </PropertyGroup>
   <ItemGroup>
diff --git a/sdk/test/Services/BedrockAgent/UnitTests/AWSSDK.UnitTests.BedrockAgent.NetFramework.csproj b/sdk/test/Services/BedrockAgent/UnitTests/AWSSDK.UnitTests.BedrockAgent.NetFramework.csproj
index 1a7b4aacb994..d4c6da068c30 100644
--- a/sdk/test/Services/BedrockAgent/UnitTests/AWSSDK.UnitTests.BedrockAgent.NetFramework.csproj
+++ b/sdk/test/Services/BedrockAgent/UnitTests/AWSSDK.UnitTests.BedrockAgent.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);TRACE;BCL;ASYNC_AWAIT;DEBUG</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CS1591,CS0612,CS0618</NoWarn>
   </PropertyGroup>
   <ItemGroup>
diff --git a/sdk/test/Services/BedrockAgentRuntime/UnitTests/AWSSDK.UnitTests.BedrockAgentRuntime.NetFramework.csproj b/sdk/test/Services/BedrockAgentRuntime/UnitTests/AWSSDK.UnitTests.BedrockAgentRuntime.NetFramework.csproj
index e14ef679f649..0eb5f90c6ee7 100644
--- a/sdk/test/Services/BedrockAgentRuntime/UnitTests/AWSSDK.UnitTests.BedrockAgentRuntime.NetFramework.csproj
+++ b/sdk/test/Services/BedrockAgentRuntime/UnitTests/AWSSDK.UnitTests.BedrockAgentRuntime.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);TRACE;BCL;ASYNC_AWAIT;DEBUG</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CS1591,CS0612,CS0618</NoWarn>
   </PropertyGroup>
   <ItemGroup>
diff --git a/sdk/test/Services/BedrockRuntime/IntegrationTests/AWSSDK.IntegrationTests.BedrockRuntime.NetFramework.csproj b/sdk/test/Services/BedrockRuntime/IntegrationTests/AWSSDK.IntegrationTests.BedrockRuntime.NetFramework.csproj
index 8aab84e3f286..ab3f27ac7ea3 100644
--- a/sdk/test/Services/BedrockRuntime/IntegrationTests/AWSSDK.IntegrationTests.BedrockRuntime.NetFramework.csproj
+++ b/sdk/test/Services/BedrockRuntime/IntegrationTests/AWSSDK.IntegrationTests.BedrockRuntime.NetFramework.csproj
@@ -1,6 +1,6 @@
 <Project Sdk="Microsoft.NET.Sdk">
 	<PropertyGroup>
-		<TargetFramework>net462</TargetFramework>
+		<TargetFramework>net472</TargetFramework>
 		<DefineConstants>$(DefineConstants);DEBUG;TRACE;BCL;ASYNC_AWAIT;LOCAL_FILE</DefineConstants>
 		<DebugType>portable</DebugType>
 		<GenerateDocumentationFile>false</GenerateDocumentationFile>
diff --git a/sdk/test/Services/BedrockRuntime/UnitTests/AWSSDK.UnitTests.BedrockRuntime.NetFramework.csproj b/sdk/test/Services/BedrockRuntime/UnitTests/AWSSDK.UnitTests.BedrockRuntime.NetFramework.csproj
index 55e14b0c01e4..64f1f31e9dd6 100644
--- a/sdk/test/Services/BedrockRuntime/UnitTests/AWSSDK.UnitTests.BedrockRuntime.NetFramework.csproj
+++ b/sdk/test/Services/BedrockRuntime/UnitTests/AWSSDK.UnitTests.BedrockRuntime.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);TRACE;BCL;ASYNC_AWAIT;DEBUG</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CS1591,CS0612,CS0618</NoWarn>
   </PropertyGroup>
   <ItemGroup>
diff --git a/sdk/test/Services/BillingConductor/UnitTests/AWSSDK.UnitTests.BillingConductor.NetFramework.csproj b/sdk/test/Services/BillingConductor/UnitTests/AWSSDK.UnitTests.BillingConductor.NetFramework.csproj
index 2669bd31bf5a..9475f9ab01d6 100644
--- a/sdk/test/Services/BillingConductor/UnitTests/AWSSDK.UnitTests.BillingConductor.NetFramework.csproj
+++ b/sdk/test/Services/BillingConductor/UnitTests/AWSSDK.UnitTests.BillingConductor.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);TRACE;BCL;ASYNC_AWAIT;DEBUG</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CS1591,CS0612,CS0618</NoWarn>
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   <ItemGroup>
diff --git a/sdk/test/Services/Braket/UnitTests/AWSSDK.UnitTests.Braket.NetFramework.csproj b/sdk/test/Services/Braket/UnitTests/AWSSDK.UnitTests.Braket.NetFramework.csproj
index 9011e5506584..c00f5a5a1268 100644
--- a/sdk/test/Services/Braket/UnitTests/AWSSDK.UnitTests.Braket.NetFramework.csproj
+++ b/sdk/test/Services/Braket/UnitTests/AWSSDK.UnitTests.Braket.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);TRACE;BCL;ASYNC_AWAIT;DEBUG</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CS1591,CS0612,CS0618</NoWarn>
   </PropertyGroup>
   <ItemGroup>
diff --git a/sdk/test/Services/Budgets/UnitTests/AWSSDK.UnitTests.Budgets.NetFramework.csproj b/sdk/test/Services/Budgets/UnitTests/AWSSDK.UnitTests.Budgets.NetFramework.csproj
index 82bf034d8abc..35a7f6ffbae9 100644
--- a/sdk/test/Services/Budgets/UnitTests/AWSSDK.UnitTests.Budgets.NetFramework.csproj
+++ b/sdk/test/Services/Budgets/UnitTests/AWSSDK.UnitTests.Budgets.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);TRACE;BCL;ASYNC_AWAIT;DEBUG</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CS1591,CS0612,CS0618</NoWarn>
   </PropertyGroup>
   <ItemGroup>
diff --git a/sdk/test/Services/CertificateManager/IntegrationTests/AWSSDK.IntegrationTests.CertificateManager.NetFramework.csproj b/sdk/test/Services/CertificateManager/IntegrationTests/AWSSDK.IntegrationTests.CertificateManager.NetFramework.csproj
index 686b11a0a0ad..df5981405741 100644
--- a/sdk/test/Services/CertificateManager/IntegrationTests/AWSSDK.IntegrationTests.CertificateManager.NetFramework.csproj
+++ b/sdk/test/Services/CertificateManager/IntegrationTests/AWSSDK.IntegrationTests.CertificateManager.NetFramework.csproj
@@ -1,6 +1,6 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
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     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>false</GenerateDocumentationFile>
diff --git a/sdk/test/Services/CertificateManager/UnitTests/AWSSDK.UnitTests.CertificateManager.NetFramework.csproj b/sdk/test/Services/CertificateManager/UnitTests/AWSSDK.UnitTests.CertificateManager.NetFramework.csproj
index 8ed8d7294651..c58c74da1014 100644
--- a/sdk/test/Services/CertificateManager/UnitTests/AWSSDK.UnitTests.CertificateManager.NetFramework.csproj
+++ b/sdk/test/Services/CertificateManager/UnitTests/AWSSDK.UnitTests.CertificateManager.NetFramework.csproj
@@ -1,7 +1,7 @@
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   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
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     <DefineConstants>$(DefineConstants);TRACE;BCL;ASYNC_AWAIT;DEBUG</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CS1591,CS0612,CS0618</NoWarn>
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   <ItemGroup>
diff --git a/sdk/test/Services/Chatbot/UnitTests/AWSSDK.UnitTests.Chatbot.NetFramework.csproj b/sdk/test/Services/Chatbot/UnitTests/AWSSDK.UnitTests.Chatbot.NetFramework.csproj
index 801c68bc1c80..3fd35e7af8c0 100644
--- a/sdk/test/Services/Chatbot/UnitTests/AWSSDK.UnitTests.Chatbot.NetFramework.csproj
+++ b/sdk/test/Services/Chatbot/UnitTests/AWSSDK.UnitTests.Chatbot.NetFramework.csproj
@@ -1,7 +1,7 @@
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   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);TRACE;BCL;ASYNC_AWAIT;DEBUG</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CS1591,CS0612,CS0618</NoWarn>
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   <ItemGroup>
diff --git a/sdk/test/Services/Chime/UnitTests/AWSSDK.UnitTests.Chime.NetFramework.csproj b/sdk/test/Services/Chime/UnitTests/AWSSDK.UnitTests.Chime.NetFramework.csproj
index 4d5f19b3d8bc..25c2e7370ae4 100644
--- a/sdk/test/Services/Chime/UnitTests/AWSSDK.UnitTests.Chime.NetFramework.csproj
+++ b/sdk/test/Services/Chime/UnitTests/AWSSDK.UnitTests.Chime.NetFramework.csproj
@@ -1,7 +1,7 @@
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    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
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     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
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+    <LangVersion>9.0</LangVersion>
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diff --git a/sdk/test/Services/ChimeSDKIdentity/UnitTests/AWSSDK.UnitTests.ChimeSDKIdentity.NetFramework.csproj b/sdk/test/Services/ChimeSDKIdentity/UnitTests/AWSSDK.UnitTests.ChimeSDKIdentity.NetFramework.csproj
index a2b190a66184..aca8195bc210 100644
--- a/sdk/test/Services/ChimeSDKIdentity/UnitTests/AWSSDK.UnitTests.ChimeSDKIdentity.NetFramework.csproj
+++ b/sdk/test/Services/ChimeSDKIdentity/UnitTests/AWSSDK.UnitTests.ChimeSDKIdentity.NetFramework.csproj
@@ -1,7 +1,7 @@
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   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
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     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
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+    <LangVersion>9.0</LangVersion>
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diff --git a/sdk/test/Services/ChimeSDKMediaPipelines/UnitTests/AWSSDK.UnitTests.ChimeSDKMediaPipelines.NetFramework.csproj b/sdk/test/Services/ChimeSDKMediaPipelines/UnitTests/AWSSDK.UnitTests.ChimeSDKMediaPipelines.NetFramework.csproj
index 8f423cd0baf1..3fbb821a26d0 100644
--- a/sdk/test/Services/ChimeSDKMediaPipelines/UnitTests/AWSSDK.UnitTests.ChimeSDKMediaPipelines.NetFramework.csproj
+++ b/sdk/test/Services/ChimeSDKMediaPipelines/UnitTests/AWSSDK.UnitTests.ChimeSDKMediaPipelines.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
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     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
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+    <LangVersion>9.0</LangVersion>
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diff --git a/sdk/test/Services/ChimeSDKMeetings/UnitTests/AWSSDK.UnitTests.ChimeSDKMeetings.NetFramework.csproj b/sdk/test/Services/ChimeSDKMeetings/UnitTests/AWSSDK.UnitTests.ChimeSDKMeetings.NetFramework.csproj
index b5aa7dcd5c5a..67bac53a3707 100644
--- a/sdk/test/Services/ChimeSDKMeetings/UnitTests/AWSSDK.UnitTests.ChimeSDKMeetings.NetFramework.csproj
+++ b/sdk/test/Services/ChimeSDKMeetings/UnitTests/AWSSDK.UnitTests.ChimeSDKMeetings.NetFramework.csproj
@@ -1,7 +1,7 @@
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   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
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     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
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+    <LangVersion>9.0</LangVersion>
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diff --git a/sdk/test/Services/ChimeSDKMessaging/UnitTests/AWSSDK.UnitTests.ChimeSDKMessaging.NetFramework.csproj b/sdk/test/Services/ChimeSDKMessaging/UnitTests/AWSSDK.UnitTests.ChimeSDKMessaging.NetFramework.csproj
index 53aa98cbcbfc..eeeacdc12048 100644
--- a/sdk/test/Services/ChimeSDKMessaging/UnitTests/AWSSDK.UnitTests.ChimeSDKMessaging.NetFramework.csproj
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@@ -1,7 +1,7 @@
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   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
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@@ -19,6 +19,7 @@
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+    <LangVersion>9.0</LangVersion>
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diff --git a/sdk/test/Services/ChimeSDKVoice/UnitTests/AWSSDK.UnitTests.ChimeSDKVoice.NetFramework.csproj b/sdk/test/Services/ChimeSDKVoice/UnitTests/AWSSDK.UnitTests.ChimeSDKVoice.NetFramework.csproj
index 64c68381b645..443e977441ea 100644
--- a/sdk/test/Services/ChimeSDKVoice/UnitTests/AWSSDK.UnitTests.ChimeSDKVoice.NetFramework.csproj
+++ b/sdk/test/Services/ChimeSDKVoice/UnitTests/AWSSDK.UnitTests.ChimeSDKVoice.NetFramework.csproj
@@ -1,7 +1,7 @@
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   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
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@@ -19,6 +19,7 @@
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+    <LangVersion>9.0</LangVersion>
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diff --git a/sdk/test/Services/CleanRooms/UnitTests/AWSSDK.UnitTests.CleanRooms.NetFramework.csproj b/sdk/test/Services/CleanRooms/UnitTests/AWSSDK.UnitTests.CleanRooms.NetFramework.csproj
index 57f4e66a3e42..6d33ff15d882 100644
--- a/sdk/test/Services/CleanRooms/UnitTests/AWSSDK.UnitTests.CleanRooms.NetFramework.csproj
+++ b/sdk/test/Services/CleanRooms/UnitTests/AWSSDK.UnitTests.CleanRooms.NetFramework.csproj
@@ -1,7 +1,7 @@
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    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
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@@ -19,6 +19,7 @@
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+    <LangVersion>9.0</LangVersion>
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diff --git a/sdk/test/Services/CleanRoomsML/UnitTests/AWSSDK.UnitTests.CleanRoomsML.NetFramework.csproj b/sdk/test/Services/CleanRoomsML/UnitTests/AWSSDK.UnitTests.CleanRoomsML.NetFramework.csproj
index 19ec5358a956..c00ab0d8c381 100644
--- a/sdk/test/Services/CleanRoomsML/UnitTests/AWSSDK.UnitTests.CleanRoomsML.NetFramework.csproj
+++ b/sdk/test/Services/CleanRoomsML/UnitTests/AWSSDK.UnitTests.CleanRoomsML.NetFramework.csproj
@@ -1,7 +1,7 @@
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   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
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@@ -19,6 +19,7 @@
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+    <LangVersion>9.0</LangVersion>
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diff --git a/sdk/test/Services/Cloud9/UnitTests/AWSSDK.UnitTests.Cloud9.NetFramework.csproj b/sdk/test/Services/Cloud9/UnitTests/AWSSDK.UnitTests.Cloud9.NetFramework.csproj
index cec245af5447..029e6ef998ab 100644
--- a/sdk/test/Services/Cloud9/UnitTests/AWSSDK.UnitTests.Cloud9.NetFramework.csproj
+++ b/sdk/test/Services/Cloud9/UnitTests/AWSSDK.UnitTests.Cloud9.NetFramework.csproj
@@ -1,7 +1,7 @@
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    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
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@@ -19,6 +19,7 @@
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+    <LangVersion>9.0</LangVersion>
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diff --git a/sdk/test/Services/CloudControlApi/UnitTests/AWSSDK.UnitTests.CloudControlApi.NetFramework.csproj b/sdk/test/Services/CloudControlApi/UnitTests/AWSSDK.UnitTests.CloudControlApi.NetFramework.csproj
index 726d7096fbf3..bd43e2e572c1 100644
--- a/sdk/test/Services/CloudControlApi/UnitTests/AWSSDK.UnitTests.CloudControlApi.NetFramework.csproj
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@@ -1,7 +1,7 @@
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@@ -19,6 +19,7 @@
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+    <LangVersion>9.0</LangVersion>
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diff --git a/sdk/test/Services/CloudDirectory/IntegrationTests/AWSSDK.IntegrationTests.CloudDirectory.NetFramework.csproj b/sdk/test/Services/CloudDirectory/IntegrationTests/AWSSDK.IntegrationTests.CloudDirectory.NetFramework.csproj
index d0077fc396b2..38a166d77c14 100644
--- a/sdk/test/Services/CloudDirectory/IntegrationTests/AWSSDK.IntegrationTests.CloudDirectory.NetFramework.csproj
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@@ -1,6 +1,6 @@
 <Project Sdk="Microsoft.NET.Sdk">
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diff --git a/sdk/test/Services/CloudDirectory/UnitTests/AWSSDK.UnitTests.CloudDirectory.NetFramework.csproj b/sdk/test/Services/CloudDirectory/UnitTests/AWSSDK.UnitTests.CloudDirectory.NetFramework.csproj
index e1585398adf0..92bb77228b6c 100644
--- a/sdk/test/Services/CloudDirectory/UnitTests/AWSSDK.UnitTests.CloudDirectory.NetFramework.csproj
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@@ -1,7 +1,7 @@
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@@ -19,6 +19,7 @@
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+    <LangVersion>9.0</LangVersion>
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diff --git a/sdk/test/Services/CloudFormation/IntegrationTests/AWSSDK.IntegrationTests.CloudFormation.NetFramework.csproj b/sdk/test/Services/CloudFormation/IntegrationTests/AWSSDK.IntegrationTests.CloudFormation.NetFramework.csproj
index 7c41b20f1bf4..6999b7643956 100644
--- a/sdk/test/Services/CloudFormation/IntegrationTests/AWSSDK.IntegrationTests.CloudFormation.NetFramework.csproj
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@@ -1,6 +1,6 @@
 <Project Sdk="Microsoft.NET.Sdk">
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diff --git a/sdk/test/Services/CloudFormation/UnitTests/AWSSDK.UnitTests.CloudFormation.NetFramework.csproj b/sdk/test/Services/CloudFormation/UnitTests/AWSSDK.UnitTests.CloudFormation.NetFramework.csproj
index 3ee22fea95a4..e0b8534146c1 100644
--- a/sdk/test/Services/CloudFormation/UnitTests/AWSSDK.UnitTests.CloudFormation.NetFramework.csproj
+++ b/sdk/test/Services/CloudFormation/UnitTests/AWSSDK.UnitTests.CloudFormation.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);TRACE;BCL;ASYNC_AWAIT;DEBUG</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CS1591,CS0612,CS0618</NoWarn>
   </PropertyGroup>
   <ItemGroup>
diff --git a/sdk/test/Services/CloudFront/IntegrationTests/AWSSDK.IntegrationTests.CloudFront.NetFramework.csproj b/sdk/test/Services/CloudFront/IntegrationTests/AWSSDK.IntegrationTests.CloudFront.NetFramework.csproj
index 23f6a881c9b4..452fb7745cea 100644
--- a/sdk/test/Services/CloudFront/IntegrationTests/AWSSDK.IntegrationTests.CloudFront.NetFramework.csproj
+++ b/sdk/test/Services/CloudFront/IntegrationTests/AWSSDK.IntegrationTests.CloudFront.NetFramework.csproj
@@ -1,6 +1,6 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);DEBUG;TRACE;BCL;ASYNC_AWAIT;LOCAL_FILE</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>false</GenerateDocumentationFile>
diff --git a/sdk/test/Services/CloudFront/UnitTests/AWSSDK.UnitTests.CloudFront.NetFramework.csproj b/sdk/test/Services/CloudFront/UnitTests/AWSSDK.UnitTests.CloudFront.NetFramework.csproj
index 190059e4d041..394661cda5b5 100644
--- a/sdk/test/Services/CloudFront/UnitTests/AWSSDK.UnitTests.CloudFront.NetFramework.csproj
+++ b/sdk/test/Services/CloudFront/UnitTests/AWSSDK.UnitTests.CloudFront.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);TRACE;BCL;ASYNC_AWAIT;DEBUG</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CS1591,CS0612,CS0618</NoWarn>
   </PropertyGroup>
   <ItemGroup>
diff --git a/sdk/test/Services/CloudFrontKeyValueStore/UnitTests/AWSSDK.UnitTests.CloudFrontKeyValueStore.NetFramework.csproj b/sdk/test/Services/CloudFrontKeyValueStore/UnitTests/AWSSDK.UnitTests.CloudFrontKeyValueStore.NetFramework.csproj
index 9b7f05f72ead..df0809b9ddec 100644
--- a/sdk/test/Services/CloudFrontKeyValueStore/UnitTests/AWSSDK.UnitTests.CloudFrontKeyValueStore.NetFramework.csproj
+++ b/sdk/test/Services/CloudFrontKeyValueStore/UnitTests/AWSSDK.UnitTests.CloudFrontKeyValueStore.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);TRACE;BCL;ASYNC_AWAIT;DEBUG</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CS1591,CS0612,CS0618</NoWarn>
   </PropertyGroup>
   <ItemGroup>
diff --git a/sdk/test/Services/CloudHSM/IntegrationTests/AWSSDK.IntegrationTests.CloudHSM.NetFramework.csproj b/sdk/test/Services/CloudHSM/IntegrationTests/AWSSDK.IntegrationTests.CloudHSM.NetFramework.csproj
index 4e14d502db3a..74b86b3227ee 100644
--- a/sdk/test/Services/CloudHSM/IntegrationTests/AWSSDK.IntegrationTests.CloudHSM.NetFramework.csproj
+++ b/sdk/test/Services/CloudHSM/IntegrationTests/AWSSDK.IntegrationTests.CloudHSM.NetFramework.csproj
@@ -1,6 +1,6 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);DEBUG;TRACE;BCL;ASYNC_AWAIT;LOCAL_FILE</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>false</GenerateDocumentationFile>
diff --git a/sdk/test/Services/CloudHSM/UnitTests/AWSSDK.UnitTests.CloudHSM.NetFramework.csproj b/sdk/test/Services/CloudHSM/UnitTests/AWSSDK.UnitTests.CloudHSM.NetFramework.csproj
index 8075cc06e5cd..9d0bd64c58a9 100644
--- a/sdk/test/Services/CloudHSM/UnitTests/AWSSDK.UnitTests.CloudHSM.NetFramework.csproj
+++ b/sdk/test/Services/CloudHSM/UnitTests/AWSSDK.UnitTests.CloudHSM.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);TRACE;BCL;ASYNC_AWAIT;DEBUG</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CS1591,CS0612,CS0618</NoWarn>
   </PropertyGroup>
   <ItemGroup>
diff --git a/sdk/test/Services/CloudHSMV2/UnitTests/AWSSDK.UnitTests.CloudHSMV2.NetFramework.csproj b/sdk/test/Services/CloudHSMV2/UnitTests/AWSSDK.UnitTests.CloudHSMV2.NetFramework.csproj
index 0ac79ef5e10c..89d8da42b4ac 100644
--- a/sdk/test/Services/CloudHSMV2/UnitTests/AWSSDK.UnitTests.CloudHSMV2.NetFramework.csproj
+++ b/sdk/test/Services/CloudHSMV2/UnitTests/AWSSDK.UnitTests.CloudHSMV2.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);TRACE;BCL;ASYNC_AWAIT;DEBUG</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CS1591,CS0612,CS0618</NoWarn>
   </PropertyGroup>
   <ItemGroup>
diff --git a/sdk/test/Services/CloudSearch/IntegrationTests/AWSSDK.IntegrationTests.CloudSearch.NetFramework.csproj b/sdk/test/Services/CloudSearch/IntegrationTests/AWSSDK.IntegrationTests.CloudSearch.NetFramework.csproj
index 35605087ae59..af94ba2de791 100644
--- a/sdk/test/Services/CloudSearch/IntegrationTests/AWSSDK.IntegrationTests.CloudSearch.NetFramework.csproj
+++ b/sdk/test/Services/CloudSearch/IntegrationTests/AWSSDK.IntegrationTests.CloudSearch.NetFramework.csproj
@@ -1,6 +1,6 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);DEBUG;TRACE;BCL;ASYNC_AWAIT;LOCAL_FILE</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>false</GenerateDocumentationFile>
diff --git a/sdk/test/Services/CloudSearch/UnitTests/AWSSDK.UnitTests.CloudSearch.NetFramework.csproj b/sdk/test/Services/CloudSearch/UnitTests/AWSSDK.UnitTests.CloudSearch.NetFramework.csproj
index f3ff66dfc29a..2854ca65adfa 100644
--- a/sdk/test/Services/CloudSearch/UnitTests/AWSSDK.UnitTests.CloudSearch.NetFramework.csproj
+++ b/sdk/test/Services/CloudSearch/UnitTests/AWSSDK.UnitTests.CloudSearch.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);TRACE;BCL;ASYNC_AWAIT;DEBUG</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CS1591,CS0612,CS0618</NoWarn>
   </PropertyGroup>
   <ItemGroup>
diff --git a/sdk/test/Services/CloudSearchDomain/UnitTests/AWSSDK.UnitTests.CloudSearchDomain.NetFramework.csproj b/sdk/test/Services/CloudSearchDomain/UnitTests/AWSSDK.UnitTests.CloudSearchDomain.NetFramework.csproj
index 5c87fd10e0a6..d6a21140bd91 100644
--- a/sdk/test/Services/CloudSearchDomain/UnitTests/AWSSDK.UnitTests.CloudSearchDomain.NetFramework.csproj
+++ b/sdk/test/Services/CloudSearchDomain/UnitTests/AWSSDK.UnitTests.CloudSearchDomain.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);TRACE;BCL;ASYNC_AWAIT;DEBUG</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CS1591,CS0612,CS0618</NoWarn>
   </PropertyGroup>
   <ItemGroup>
diff --git a/sdk/test/Services/CloudTrail/IntegrationTests/AWSSDK.IntegrationTests.CloudTrail.NetFramework.csproj b/sdk/test/Services/CloudTrail/IntegrationTests/AWSSDK.IntegrationTests.CloudTrail.NetFramework.csproj
index 8fe4182db371..c4aec9e17b14 100644
--- a/sdk/test/Services/CloudTrail/IntegrationTests/AWSSDK.IntegrationTests.CloudTrail.NetFramework.csproj
+++ b/sdk/test/Services/CloudTrail/IntegrationTests/AWSSDK.IntegrationTests.CloudTrail.NetFramework.csproj
@@ -1,6 +1,6 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);DEBUG;TRACE;BCL;ASYNC_AWAIT;LOCAL_FILE</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>false</GenerateDocumentationFile>
diff --git a/sdk/test/Services/CloudTrail/UnitTests/AWSSDK.UnitTests.CloudTrail.NetFramework.csproj b/sdk/test/Services/CloudTrail/UnitTests/AWSSDK.UnitTests.CloudTrail.NetFramework.csproj
index ca385e0126a3..c087b018050e 100644
--- a/sdk/test/Services/CloudTrail/UnitTests/AWSSDK.UnitTests.CloudTrail.NetFramework.csproj
+++ b/sdk/test/Services/CloudTrail/UnitTests/AWSSDK.UnitTests.CloudTrail.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);TRACE;BCL;ASYNC_AWAIT;DEBUG</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CS1591,CS0612,CS0618</NoWarn>
   </PropertyGroup>
   <ItemGroup>
diff --git a/sdk/test/Services/CloudTrailData/UnitTests/AWSSDK.UnitTests.CloudTrailData.NetFramework.csproj b/sdk/test/Services/CloudTrailData/UnitTests/AWSSDK.UnitTests.CloudTrailData.NetFramework.csproj
index 64b31998e32c..368fe8b28697 100644
--- a/sdk/test/Services/CloudTrailData/UnitTests/AWSSDK.UnitTests.CloudTrailData.NetFramework.csproj
+++ b/sdk/test/Services/CloudTrailData/UnitTests/AWSSDK.UnitTests.CloudTrailData.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);TRACE;BCL;ASYNC_AWAIT;DEBUG</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CS1591,CS0612,CS0618</NoWarn>
   </PropertyGroup>
   <ItemGroup>
diff --git a/sdk/test/Services/CloudWatch/IntegrationTests/AWSSDK.IntegrationTests.CloudWatch.NetFramework.csproj b/sdk/test/Services/CloudWatch/IntegrationTests/AWSSDK.IntegrationTests.CloudWatch.NetFramework.csproj
index 01c8e6dc97d0..57ec66d07af4 100644
--- a/sdk/test/Services/CloudWatch/IntegrationTests/AWSSDK.IntegrationTests.CloudWatch.NetFramework.csproj
+++ b/sdk/test/Services/CloudWatch/IntegrationTests/AWSSDK.IntegrationTests.CloudWatch.NetFramework.csproj
@@ -1,6 +1,6 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);DEBUG;TRACE;BCL;ASYNC_AWAIT;LOCAL_FILE</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>false</GenerateDocumentationFile>
diff --git a/sdk/test/Services/CloudWatch/UnitTests/AWSSDK.UnitTests.CloudWatch.NetFramework.csproj b/sdk/test/Services/CloudWatch/UnitTests/AWSSDK.UnitTests.CloudWatch.NetFramework.csproj
index e8e0ffc02ade..4a76d7b1bdf7 100644
--- a/sdk/test/Services/CloudWatch/UnitTests/AWSSDK.UnitTests.CloudWatch.NetFramework.csproj
+++ b/sdk/test/Services/CloudWatch/UnitTests/AWSSDK.UnitTests.CloudWatch.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);TRACE;BCL;ASYNC_AWAIT;DEBUG</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CS1591,CS0612,CS0618</NoWarn>
   </PropertyGroup>
   <ItemGroup>
diff --git a/sdk/test/Services/CloudWatchEvents/IntegrationTests/AWSSDK.IntegrationTests.CloudWatchEvents.NetFramework.csproj b/sdk/test/Services/CloudWatchEvents/IntegrationTests/AWSSDK.IntegrationTests.CloudWatchEvents.NetFramework.csproj
index 2c0d7574770a..80472f25309b 100644
--- a/sdk/test/Services/CloudWatchEvents/IntegrationTests/AWSSDK.IntegrationTests.CloudWatchEvents.NetFramework.csproj
+++ b/sdk/test/Services/CloudWatchEvents/IntegrationTests/AWSSDK.IntegrationTests.CloudWatchEvents.NetFramework.csproj
@@ -1,6 +1,6 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
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     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>false</GenerateDocumentationFile>
diff --git a/sdk/test/Services/CloudWatchEvents/UnitTests/AWSSDK.UnitTests.CloudWatchEvents.NetFramework.csproj b/sdk/test/Services/CloudWatchEvents/UnitTests/AWSSDK.UnitTests.CloudWatchEvents.NetFramework.csproj
index 4c480669ef75..1f09b1fdfb8c 100644
--- a/sdk/test/Services/CloudWatchEvents/UnitTests/AWSSDK.UnitTests.CloudWatchEvents.NetFramework.csproj
+++ b/sdk/test/Services/CloudWatchEvents/UnitTests/AWSSDK.UnitTests.CloudWatchEvents.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);TRACE;BCL;ASYNC_AWAIT;DEBUG</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CS1591,CS0612,CS0618</NoWarn>
   </PropertyGroup>
   <ItemGroup>
diff --git a/sdk/test/Services/CloudWatchEvidently/UnitTests/AWSSDK.UnitTests.CloudWatchEvidently.NetFramework.csproj b/sdk/test/Services/CloudWatchEvidently/UnitTests/AWSSDK.UnitTests.CloudWatchEvidently.NetFramework.csproj
index 53ea4aaee2c3..4604f5fbdea6 100644
--- a/sdk/test/Services/CloudWatchEvidently/UnitTests/AWSSDK.UnitTests.CloudWatchEvidently.NetFramework.csproj
+++ b/sdk/test/Services/CloudWatchEvidently/UnitTests/AWSSDK.UnitTests.CloudWatchEvidently.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);TRACE;BCL;ASYNC_AWAIT;DEBUG</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CS1591,CS0612,CS0618</NoWarn>
   </PropertyGroup>
   <ItemGroup>
diff --git a/sdk/test/Services/CloudWatchLogs/IntegrationTests/AWSSDK.IntegrationTests.CloudWatchLogs.NetFramework.csproj b/sdk/test/Services/CloudWatchLogs/IntegrationTests/AWSSDK.IntegrationTests.CloudWatchLogs.NetFramework.csproj
index 9dd3a55a5a31..16b4aa14125f 100644
--- a/sdk/test/Services/CloudWatchLogs/IntegrationTests/AWSSDK.IntegrationTests.CloudWatchLogs.NetFramework.csproj
+++ b/sdk/test/Services/CloudWatchLogs/IntegrationTests/AWSSDK.IntegrationTests.CloudWatchLogs.NetFramework.csproj
@@ -1,6 +1,6 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
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     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>false</GenerateDocumentationFile>
diff --git a/sdk/test/Services/CloudWatchLogs/UnitTests/AWSSDK.UnitTests.CloudWatchLogs.NetFramework.csproj b/sdk/test/Services/CloudWatchLogs/UnitTests/AWSSDK.UnitTests.CloudWatchLogs.NetFramework.csproj
index a38b61358e61..b8a8e7e85bde 100644
--- a/sdk/test/Services/CloudWatchLogs/UnitTests/AWSSDK.UnitTests.CloudWatchLogs.NetFramework.csproj
+++ b/sdk/test/Services/CloudWatchLogs/UnitTests/AWSSDK.UnitTests.CloudWatchLogs.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
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     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CS1591,CS0612,CS0618</NoWarn>
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   <ItemGroup>
diff --git a/sdk/test/Services/CloudWatchRUM/UnitTests/AWSSDK.UnitTests.CloudWatchRUM.NetFramework.csproj b/sdk/test/Services/CloudWatchRUM/UnitTests/AWSSDK.UnitTests.CloudWatchRUM.NetFramework.csproj
index ef99c5810dac..99690eea8b6b 100644
--- a/sdk/test/Services/CloudWatchRUM/UnitTests/AWSSDK.UnitTests.CloudWatchRUM.NetFramework.csproj
+++ b/sdk/test/Services/CloudWatchRUM/UnitTests/AWSSDK.UnitTests.CloudWatchRUM.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
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     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CS1591,CS0612,CS0618</NoWarn>
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   <ItemGroup>
diff --git a/sdk/test/Services/CodeArtifact/UnitTests/AWSSDK.UnitTests.CodeArtifact.NetFramework.csproj b/sdk/test/Services/CodeArtifact/UnitTests/AWSSDK.UnitTests.CodeArtifact.NetFramework.csproj
index f621b8a2ff57..3fbc85f776cd 100644
--- a/sdk/test/Services/CodeArtifact/UnitTests/AWSSDK.UnitTests.CodeArtifact.NetFramework.csproj
+++ b/sdk/test/Services/CodeArtifact/UnitTests/AWSSDK.UnitTests.CodeArtifact.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
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    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
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     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
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+    <LangVersion>9.0</LangVersion>
     <NoWarn>CS1591,CS0612,CS0618</NoWarn>
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   <ItemGroup>
diff --git a/sdk/test/Services/CodeBuild/UnitTests/AWSSDK.UnitTests.CodeBuild.NetFramework.csproj b/sdk/test/Services/CodeBuild/UnitTests/AWSSDK.UnitTests.CodeBuild.NetFramework.csproj
index c6cea281117b..620978dbc089 100644
--- a/sdk/test/Services/CodeBuild/UnitTests/AWSSDK.UnitTests.CodeBuild.NetFramework.csproj
+++ b/sdk/test/Services/CodeBuild/UnitTests/AWSSDK.UnitTests.CodeBuild.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);TRACE;BCL;ASYNC_AWAIT;DEBUG</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CS1591,CS0612,CS0618</NoWarn>
   </PropertyGroup>
   <ItemGroup>
diff --git a/sdk/test/Services/CodeCatalyst/UnitTests/AWSSDK.UnitTests.CodeCatalyst.NetFramework.csproj b/sdk/test/Services/CodeCatalyst/UnitTests/AWSSDK.UnitTests.CodeCatalyst.NetFramework.csproj
index 925fa5099b5f..b669b80ac71f 100644
--- a/sdk/test/Services/CodeCatalyst/UnitTests/AWSSDK.UnitTests.CodeCatalyst.NetFramework.csproj
+++ b/sdk/test/Services/CodeCatalyst/UnitTests/AWSSDK.UnitTests.CodeCatalyst.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);TRACE;BCL;ASYNC_AWAIT;DEBUG</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CS1591,CS0612,CS0618</NoWarn>
   </PropertyGroup>
   <ItemGroup>
diff --git a/sdk/test/Services/CodeCommit/UnitTests/AWSSDK.UnitTests.CodeCommit.NetFramework.csproj b/sdk/test/Services/CodeCommit/UnitTests/AWSSDK.UnitTests.CodeCommit.NetFramework.csproj
index 34e7cae1325e..088863087054 100644
--- a/sdk/test/Services/CodeCommit/UnitTests/AWSSDK.UnitTests.CodeCommit.NetFramework.csproj
+++ b/sdk/test/Services/CodeCommit/UnitTests/AWSSDK.UnitTests.CodeCommit.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);TRACE;BCL;ASYNC_AWAIT;DEBUG</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CS1591,CS0612,CS0618</NoWarn>
   </PropertyGroup>
   <ItemGroup>
diff --git a/sdk/test/Services/CodeConnections/UnitTests/AWSSDK.UnitTests.CodeConnections.NetFramework.csproj b/sdk/test/Services/CodeConnections/UnitTests/AWSSDK.UnitTests.CodeConnections.NetFramework.csproj
index b0f28378d563..b9b2f92fab57 100644
--- a/sdk/test/Services/CodeConnections/UnitTests/AWSSDK.UnitTests.CodeConnections.NetFramework.csproj
+++ b/sdk/test/Services/CodeConnections/UnitTests/AWSSDK.UnitTests.CodeConnections.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);TRACE;BCL;ASYNC_AWAIT;DEBUG</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CS1591,CS0612,CS0618</NoWarn>
   </PropertyGroup>
   <ItemGroup>
diff --git a/sdk/test/Services/CodeDeploy/IntegrationTests/AWSSDK.IntegrationTests.CodeDeploy.NetFramework.csproj b/sdk/test/Services/CodeDeploy/IntegrationTests/AWSSDK.IntegrationTests.CodeDeploy.NetFramework.csproj
index a4808add2b2a..4497dc7fa0cb 100644
--- a/sdk/test/Services/CodeDeploy/IntegrationTests/AWSSDK.IntegrationTests.CodeDeploy.NetFramework.csproj
+++ b/sdk/test/Services/CodeDeploy/IntegrationTests/AWSSDK.IntegrationTests.CodeDeploy.NetFramework.csproj
@@ -1,6 +1,6 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);DEBUG;TRACE;BCL;ASYNC_AWAIT;LOCAL_FILE</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>false</GenerateDocumentationFile>
diff --git a/sdk/test/Services/CodeDeploy/UnitTests/AWSSDK.UnitTests.CodeDeploy.NetFramework.csproj b/sdk/test/Services/CodeDeploy/UnitTests/AWSSDK.UnitTests.CodeDeploy.NetFramework.csproj
index 99ef6498601f..b40978858afc 100644
--- a/sdk/test/Services/CodeDeploy/UnitTests/AWSSDK.UnitTests.CodeDeploy.NetFramework.csproj
+++ b/sdk/test/Services/CodeDeploy/UnitTests/AWSSDK.UnitTests.CodeDeploy.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);TRACE;BCL;ASYNC_AWAIT;DEBUG</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CS1591,CS0612,CS0618</NoWarn>
   </PropertyGroup>
   <ItemGroup>
diff --git a/sdk/test/Services/CodeGuruProfiler/UnitTests/AWSSDK.UnitTests.CodeGuruProfiler.NetFramework.csproj b/sdk/test/Services/CodeGuruProfiler/UnitTests/AWSSDK.UnitTests.CodeGuruProfiler.NetFramework.csproj
index 1efafd7c07c3..0f21649dc23a 100644
--- a/sdk/test/Services/CodeGuruProfiler/UnitTests/AWSSDK.UnitTests.CodeGuruProfiler.NetFramework.csproj
+++ b/sdk/test/Services/CodeGuruProfiler/UnitTests/AWSSDK.UnitTests.CodeGuruProfiler.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);TRACE;BCL;ASYNC_AWAIT;DEBUG</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CS1591,CS0612,CS0618</NoWarn>
   </PropertyGroup>
   <ItemGroup>
diff --git a/sdk/test/Services/CodeGuruReviewer/UnitTests/AWSSDK.UnitTests.CodeGuruReviewer.NetFramework.csproj b/sdk/test/Services/CodeGuruReviewer/UnitTests/AWSSDK.UnitTests.CodeGuruReviewer.NetFramework.csproj
index f83998a4af98..83640f011021 100644
--- a/sdk/test/Services/CodeGuruReviewer/UnitTests/AWSSDK.UnitTests.CodeGuruReviewer.NetFramework.csproj
+++ b/sdk/test/Services/CodeGuruReviewer/UnitTests/AWSSDK.UnitTests.CodeGuruReviewer.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);TRACE;BCL;ASYNC_AWAIT;DEBUG</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CS1591,CS0612,CS0618</NoWarn>
   </PropertyGroup>
   <ItemGroup>
diff --git a/sdk/test/Services/CodeGuruSecurity/UnitTests/AWSSDK.UnitTests.CodeGuruSecurity.NetFramework.csproj b/sdk/test/Services/CodeGuruSecurity/UnitTests/AWSSDK.UnitTests.CodeGuruSecurity.NetFramework.csproj
index 59c1d0b57713..839b3b6058c7 100644
--- a/sdk/test/Services/CodeGuruSecurity/UnitTests/AWSSDK.UnitTests.CodeGuruSecurity.NetFramework.csproj
+++ b/sdk/test/Services/CodeGuruSecurity/UnitTests/AWSSDK.UnitTests.CodeGuruSecurity.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);TRACE;BCL;ASYNC_AWAIT;DEBUG</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CS1591,CS0612,CS0618</NoWarn>
   </PropertyGroup>
   <ItemGroup>
diff --git a/sdk/test/Services/CodePipeline/UnitTests/AWSSDK.UnitTests.CodePipeline.NetFramework.csproj b/sdk/test/Services/CodePipeline/UnitTests/AWSSDK.UnitTests.CodePipeline.NetFramework.csproj
index d55d2e62efd0..5ae3ac0658f7 100644
--- a/sdk/test/Services/CodePipeline/UnitTests/AWSSDK.UnitTests.CodePipeline.NetFramework.csproj
+++ b/sdk/test/Services/CodePipeline/UnitTests/AWSSDK.UnitTests.CodePipeline.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);TRACE;BCL;ASYNC_AWAIT;DEBUG</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CS1591,CS0612,CS0618</NoWarn>
   </PropertyGroup>
   <ItemGroup>
diff --git a/sdk/test/Services/CodeStar/UnitTests/AWSSDK.UnitTests.CodeStar.NetFramework.csproj b/sdk/test/Services/CodeStar/UnitTests/AWSSDK.UnitTests.CodeStar.NetFramework.csproj
index 95571b352496..3ef05a77208d 100644
--- a/sdk/test/Services/CodeStar/UnitTests/AWSSDK.UnitTests.CodeStar.NetFramework.csproj
+++ b/sdk/test/Services/CodeStar/UnitTests/AWSSDK.UnitTests.CodeStar.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);TRACE;BCL;ASYNC_AWAIT;DEBUG</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CS1591,CS0612,CS0618</NoWarn>
   </PropertyGroup>
   <ItemGroup>
diff --git a/sdk/test/Services/CodeStarNotifications/UnitTests/AWSSDK.UnitTests.CodeStarNotifications.NetFramework.csproj b/sdk/test/Services/CodeStarNotifications/UnitTests/AWSSDK.UnitTests.CodeStarNotifications.NetFramework.csproj
index 2d36b6589a71..c24c7910315f 100644
--- a/sdk/test/Services/CodeStarNotifications/UnitTests/AWSSDK.UnitTests.CodeStarNotifications.NetFramework.csproj
+++ b/sdk/test/Services/CodeStarNotifications/UnitTests/AWSSDK.UnitTests.CodeStarNotifications.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);TRACE;BCL;ASYNC_AWAIT;DEBUG</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CS1591,CS0612,CS0618</NoWarn>
   </PropertyGroup>
   <ItemGroup>
diff --git a/sdk/test/Services/CodeStarconnections/UnitTests/AWSSDK.UnitTests.CodeStarconnections.NetFramework.csproj b/sdk/test/Services/CodeStarconnections/UnitTests/AWSSDK.UnitTests.CodeStarconnections.NetFramework.csproj
index 79d5ee5707a6..4dbea6ea1f74 100644
--- a/sdk/test/Services/CodeStarconnections/UnitTests/AWSSDK.UnitTests.CodeStarconnections.NetFramework.csproj
+++ b/sdk/test/Services/CodeStarconnections/UnitTests/AWSSDK.UnitTests.CodeStarconnections.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);TRACE;BCL;ASYNC_AWAIT;DEBUG</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CS1591,CS0612,CS0618</NoWarn>
   </PropertyGroup>
   <ItemGroup>
diff --git a/sdk/test/Services/CognitoIdentity/UnitTests/AWSSDK.UnitTests.CognitoIdentity.NetFramework.csproj b/sdk/test/Services/CognitoIdentity/UnitTests/AWSSDK.UnitTests.CognitoIdentity.NetFramework.csproj
index 4d38e90201d6..3dec3fd47993 100644
--- a/sdk/test/Services/CognitoIdentity/UnitTests/AWSSDK.UnitTests.CognitoIdentity.NetFramework.csproj
+++ b/sdk/test/Services/CognitoIdentity/UnitTests/AWSSDK.UnitTests.CognitoIdentity.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);TRACE;BCL;ASYNC_AWAIT;DEBUG</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CS1591,CS0612,CS0618</NoWarn>
   </PropertyGroup>
   <ItemGroup>
diff --git a/sdk/test/Services/CognitoIdentityProvider/UnitTests/AWSSDK.UnitTests.CognitoIdentityProvider.NetFramework.csproj b/sdk/test/Services/CognitoIdentityProvider/UnitTests/AWSSDK.UnitTests.CognitoIdentityProvider.NetFramework.csproj
index c42ad57733cf..1e3414ea61ea 100644
--- a/sdk/test/Services/CognitoIdentityProvider/UnitTests/AWSSDK.UnitTests.CognitoIdentityProvider.NetFramework.csproj
+++ b/sdk/test/Services/CognitoIdentityProvider/UnitTests/AWSSDK.UnitTests.CognitoIdentityProvider.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);TRACE;BCL;ASYNC_AWAIT;DEBUG</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CS1591,CS0612,CS0618</NoWarn>
   </PropertyGroup>
   <ItemGroup>
diff --git a/sdk/test/Services/CognitoSync/IntegrationTests/AWSSDK.IntegrationTests.CognitoSync.NetFramework.csproj b/sdk/test/Services/CognitoSync/IntegrationTests/AWSSDK.IntegrationTests.CognitoSync.NetFramework.csproj
index 5b8538a69d9d..4d6dd31756f7 100644
--- a/sdk/test/Services/CognitoSync/IntegrationTests/AWSSDK.IntegrationTests.CognitoSync.NetFramework.csproj
+++ b/sdk/test/Services/CognitoSync/IntegrationTests/AWSSDK.IntegrationTests.CognitoSync.NetFramework.csproj
@@ -1,12 +1,12 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);DEBUG;TRACE;BCL;ASYNC_AWAIT;LOCAL_FILE</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>false</GenerateDocumentationFile>
     <AssemblyName>AWSSDK.IntegrationTests.CognitoSync.NetFramework</AssemblyName>
     <PackageId>AWSSDK.IntegrationTests.CognitoSync.NetFramework</PackageId>
-    <BaseIntermediateOutputPath>./obj/net462</BaseIntermediateOutputPath>
+    <BaseIntermediateOutputPath>./obj/net472</BaseIntermediateOutputPath>
 
     <GenerateAssemblyTitleAttribute>false</GenerateAssemblyTitleAttribute>
     <GenerateAssemblyConfigurationAttribute>false</GenerateAssemblyConfigurationAttribute>
diff --git a/sdk/test/Services/CognitoSync/UnitTests/AWSSDK.UnitTests.CognitoSync.NetFramework.csproj b/sdk/test/Services/CognitoSync/UnitTests/AWSSDK.UnitTests.CognitoSync.NetFramework.csproj
index bc102a340578..5b88729fa94e 100644
--- a/sdk/test/Services/CognitoSync/UnitTests/AWSSDK.UnitTests.CognitoSync.NetFramework.csproj
+++ b/sdk/test/Services/CognitoSync/UnitTests/AWSSDK.UnitTests.CognitoSync.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);TRACE;BCL;ASYNC_AWAIT;DEBUG</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CS1591,CS0612,CS0618</NoWarn>
   </PropertyGroup>
   <ItemGroup>
diff --git a/sdk/test/Services/Comprehend/UnitTests/AWSSDK.UnitTests.Comprehend.NetFramework.csproj b/sdk/test/Services/Comprehend/UnitTests/AWSSDK.UnitTests.Comprehend.NetFramework.csproj
index e64046d50929..d9135ddd72b2 100644
--- a/sdk/test/Services/Comprehend/UnitTests/AWSSDK.UnitTests.Comprehend.NetFramework.csproj
+++ b/sdk/test/Services/Comprehend/UnitTests/AWSSDK.UnitTests.Comprehend.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);TRACE;BCL;ASYNC_AWAIT;DEBUG</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CS1591,CS0612,CS0618</NoWarn>
   </PropertyGroup>
   <ItemGroup>
diff --git a/sdk/test/Services/ComprehendMedical/UnitTests/AWSSDK.UnitTests.ComprehendMedical.NetFramework.csproj b/sdk/test/Services/ComprehendMedical/UnitTests/AWSSDK.UnitTests.ComprehendMedical.NetFramework.csproj
index c1c4c8791fbc..8d20e6abb027 100644
--- a/sdk/test/Services/ComprehendMedical/UnitTests/AWSSDK.UnitTests.ComprehendMedical.NetFramework.csproj
+++ b/sdk/test/Services/ComprehendMedical/UnitTests/AWSSDK.UnitTests.ComprehendMedical.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);TRACE;BCL;ASYNC_AWAIT;DEBUG</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CS1591,CS0612,CS0618</NoWarn>
   </PropertyGroup>
   <ItemGroup>
diff --git a/sdk/test/Services/ComputeOptimizer/UnitTests/AWSSDK.UnitTests.ComputeOptimizer.NetFramework.csproj b/sdk/test/Services/ComputeOptimizer/UnitTests/AWSSDK.UnitTests.ComputeOptimizer.NetFramework.csproj
index 57e42ad483d5..7e9184f22474 100644
--- a/sdk/test/Services/ComputeOptimizer/UnitTests/AWSSDK.UnitTests.ComputeOptimizer.NetFramework.csproj
+++ b/sdk/test/Services/ComputeOptimizer/UnitTests/AWSSDK.UnitTests.ComputeOptimizer.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);TRACE;BCL;ASYNC_AWAIT;DEBUG</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CS1591,CS0612,CS0618</NoWarn>
   </PropertyGroup>
   <ItemGroup>
diff --git a/sdk/test/Services/ConfigService/IntegrationTests/AWSSDK.IntegrationTests.ConfigService.NetFramework.csproj b/sdk/test/Services/ConfigService/IntegrationTests/AWSSDK.IntegrationTests.ConfigService.NetFramework.csproj
index c46561580ad9..82ae61dc7d7d 100644
--- a/sdk/test/Services/ConfigService/IntegrationTests/AWSSDK.IntegrationTests.ConfigService.NetFramework.csproj
+++ b/sdk/test/Services/ConfigService/IntegrationTests/AWSSDK.IntegrationTests.ConfigService.NetFramework.csproj
@@ -1,6 +1,6 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);DEBUG;TRACE;BCL;ASYNC_AWAIT;LOCAL_FILE</DefineConstants>
     <DebugType>portable</DebugType>
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diff --git a/sdk/test/Services/ConfigService/UnitTests/AWSSDK.UnitTests.ConfigService.NetFramework.csproj b/sdk/test/Services/ConfigService/UnitTests/AWSSDK.UnitTests.ConfigService.NetFramework.csproj
index 4e8073574a2b..c3a079ecc1ca 100644
--- a/sdk/test/Services/ConfigService/UnitTests/AWSSDK.UnitTests.ConfigService.NetFramework.csproj
+++ b/sdk/test/Services/ConfigService/UnitTests/AWSSDK.UnitTests.ConfigService.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);TRACE;BCL;ASYNC_AWAIT;DEBUG</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
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+    <LangVersion>9.0</LangVersion>
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   <ItemGroup>
diff --git a/sdk/test/Services/Connect/UnitTests/AWSSDK.UnitTests.Connect.NetFramework.csproj b/sdk/test/Services/Connect/UnitTests/AWSSDK.UnitTests.Connect.NetFramework.csproj
index acf05c04ddee..f984d31215de 100644
--- a/sdk/test/Services/Connect/UnitTests/AWSSDK.UnitTests.Connect.NetFramework.csproj
+++ b/sdk/test/Services/Connect/UnitTests/AWSSDK.UnitTests.Connect.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
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     <DefineConstants>$(DefineConstants);TRACE;BCL;ASYNC_AWAIT;DEBUG</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
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+    <LangVersion>9.0</LangVersion>
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diff --git a/sdk/test/Services/ConnectCampaignService/UnitTests/AWSSDK.UnitTests.ConnectCampaignService.NetFramework.csproj b/sdk/test/Services/ConnectCampaignService/UnitTests/AWSSDK.UnitTests.ConnectCampaignService.NetFramework.csproj
index 9dd3ae31eb64..2d1ed8aed465 100644
--- a/sdk/test/Services/ConnectCampaignService/UnitTests/AWSSDK.UnitTests.ConnectCampaignService.NetFramework.csproj
+++ b/sdk/test/Services/ConnectCampaignService/UnitTests/AWSSDK.UnitTests.ConnectCampaignService.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
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     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
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+    <LangVersion>9.0</LangVersion>
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diff --git a/sdk/test/Services/ConnectCases/UnitTests/AWSSDK.UnitTests.ConnectCases.NetFramework.csproj b/sdk/test/Services/ConnectCases/UnitTests/AWSSDK.UnitTests.ConnectCases.NetFramework.csproj
index 487f523687ec..f0381fb67493 100644
--- a/sdk/test/Services/ConnectCases/UnitTests/AWSSDK.UnitTests.ConnectCases.NetFramework.csproj
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@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
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    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
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     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
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+    <LangVersion>9.0</LangVersion>
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diff --git a/sdk/test/Services/ConnectContactLens/UnitTests/AWSSDK.UnitTests.ConnectContactLens.NetFramework.csproj b/sdk/test/Services/ConnectContactLens/UnitTests/AWSSDK.UnitTests.ConnectContactLens.NetFramework.csproj
index fc329306a1b7..7842dca7990d 100644
--- a/sdk/test/Services/ConnectContactLens/UnitTests/AWSSDK.UnitTests.ConnectContactLens.NetFramework.csproj
+++ b/sdk/test/Services/ConnectContactLens/UnitTests/AWSSDK.UnitTests.ConnectContactLens.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
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    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
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@@ -19,6 +19,7 @@
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+    <LangVersion>9.0</LangVersion>
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diff --git a/sdk/test/Services/ConnectParticipant/UnitTests/AWSSDK.UnitTests.ConnectParticipant.NetFramework.csproj b/sdk/test/Services/ConnectParticipant/UnitTests/AWSSDK.UnitTests.ConnectParticipant.NetFramework.csproj
index c8f108de8f99..225b5397b204 100644
--- a/sdk/test/Services/ConnectParticipant/UnitTests/AWSSDK.UnitTests.ConnectParticipant.NetFramework.csproj
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@@ -1,7 +1,7 @@
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@@ -19,6 +19,7 @@
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+    <LangVersion>9.0</LangVersion>
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diff --git a/sdk/test/Services/ConnectWisdomService/UnitTests/AWSSDK.UnitTests.ConnectWisdomService.NetFramework.csproj b/sdk/test/Services/ConnectWisdomService/UnitTests/AWSSDK.UnitTests.ConnectWisdomService.NetFramework.csproj
index 467b6c27a34b..a8391a3929a8 100644
--- a/sdk/test/Services/ConnectWisdomService/UnitTests/AWSSDK.UnitTests.ConnectWisdomService.NetFramework.csproj
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@@ -1,7 +1,7 @@
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@@ -19,6 +19,7 @@
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+    <LangVersion>9.0</LangVersion>
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diff --git a/sdk/test/Services/ControlCatalog/UnitTests/AWSSDK.UnitTests.ControlCatalog.NetFramework.csproj b/sdk/test/Services/ControlCatalog/UnitTests/AWSSDK.UnitTests.ControlCatalog.NetFramework.csproj
index a282d7d39a31..4daeff5ba892 100644
--- a/sdk/test/Services/ControlCatalog/UnitTests/AWSSDK.UnitTests.ControlCatalog.NetFramework.csproj
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@@ -1,7 +1,7 @@
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+    <LangVersion>9.0</LangVersion>
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diff --git a/sdk/test/Services/ControlTower/UnitTests/AWSSDK.UnitTests.ControlTower.NetFramework.csproj b/sdk/test/Services/ControlTower/UnitTests/AWSSDK.UnitTests.ControlTower.NetFramework.csproj
index 5c33e1a663ad..44797baa4ae9 100644
--- a/sdk/test/Services/ControlTower/UnitTests/AWSSDK.UnitTests.ControlTower.NetFramework.csproj
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@@ -1,7 +1,7 @@
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@@ -19,6 +19,7 @@
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+    <LangVersion>9.0</LangVersion>
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diff --git a/sdk/test/Services/CostAndUsageReport/UnitTests/AWSSDK.UnitTests.CostAndUsageReport.NetFramework.csproj b/sdk/test/Services/CostAndUsageReport/UnitTests/AWSSDK.UnitTests.CostAndUsageReport.NetFramework.csproj
index 9820df4e456d..928ac95d986b 100644
--- a/sdk/test/Services/CostAndUsageReport/UnitTests/AWSSDK.UnitTests.CostAndUsageReport.NetFramework.csproj
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@@ -1,7 +1,7 @@
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+    <LangVersion>9.0</LangVersion>
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diff --git a/sdk/test/Services/CostExplorer/UnitTests/AWSSDK.UnitTests.CostExplorer.NetFramework.csproj b/sdk/test/Services/CostExplorer/UnitTests/AWSSDK.UnitTests.CostExplorer.NetFramework.csproj
index ec9a9097e5f6..8f0848ad2bae 100644
--- a/sdk/test/Services/CostExplorer/UnitTests/AWSSDK.UnitTests.CostExplorer.NetFramework.csproj
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@@ -1,7 +1,7 @@
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+    <LangVersion>9.0</LangVersion>
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diff --git a/sdk/test/Services/CostOptimizationHub/UnitTests/AWSSDK.UnitTests.CostOptimizationHub.NetFramework.csproj b/sdk/test/Services/CostOptimizationHub/UnitTests/AWSSDK.UnitTests.CostOptimizationHub.NetFramework.csproj
index 543df8fe1472..a9e70bdcd4c1 100644
--- a/sdk/test/Services/CostOptimizationHub/UnitTests/AWSSDK.UnitTests.CostOptimizationHub.NetFramework.csproj
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+    <LangVersion>9.0</LangVersion>
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diff --git a/sdk/test/Services/CustomerProfiles/UnitTests/AWSSDK.UnitTests.CustomerProfiles.NetFramework.csproj b/sdk/test/Services/CustomerProfiles/UnitTests/AWSSDK.UnitTests.CustomerProfiles.NetFramework.csproj
index cad9e59deac4..d4ca229dde31 100644
--- a/sdk/test/Services/CustomerProfiles/UnitTests/AWSSDK.UnitTests.CustomerProfiles.NetFramework.csproj
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@@ -1,7 +1,7 @@
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@@ -19,6 +19,7 @@
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+    <LangVersion>9.0</LangVersion>
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diff --git a/sdk/test/Services/DAX/UnitTests/AWSSDK.UnitTests.DAX.NetFramework.csproj b/sdk/test/Services/DAX/UnitTests/AWSSDK.UnitTests.DAX.NetFramework.csproj
index 6c0e22cd67ef..4a5233c0a7d2 100644
--- a/sdk/test/Services/DAX/UnitTests/AWSSDK.UnitTests.DAX.NetFramework.csproj
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@@ -1,7 +1,7 @@
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+    <LangVersion>9.0</LangVersion>
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diff --git a/sdk/test/Services/DLM/UnitTests/AWSSDK.UnitTests.DLM.NetFramework.csproj b/sdk/test/Services/DLM/UnitTests/AWSSDK.UnitTests.DLM.NetFramework.csproj
index 3ca578a54111..d6263ea1dae5 100644
--- a/sdk/test/Services/DLM/UnitTests/AWSSDK.UnitTests.DLM.NetFramework.csproj
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@@ -19,6 +19,7 @@
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+    <LangVersion>9.0</LangVersion>
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diff --git a/sdk/test/Services/DataExchange/UnitTests/AWSSDK.UnitTests.DataExchange.NetFramework.csproj b/sdk/test/Services/DataExchange/UnitTests/AWSSDK.UnitTests.DataExchange.NetFramework.csproj
index df1303cf2cf1..eedd293f3b92 100644
--- a/sdk/test/Services/DataExchange/UnitTests/AWSSDK.UnitTests.DataExchange.NetFramework.csproj
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@@ -1,7 +1,7 @@
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@@ -19,6 +19,7 @@
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+    <LangVersion>9.0</LangVersion>
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diff --git a/sdk/test/Services/DataPipeline/IntegrationTests/AWSSDK.IntegrationTests.DataPipeline.NetFramework.csproj b/sdk/test/Services/DataPipeline/IntegrationTests/AWSSDK.IntegrationTests.DataPipeline.NetFramework.csproj
index e002de6fae3e..36c0cc89139f 100644
--- a/sdk/test/Services/DataPipeline/IntegrationTests/AWSSDK.IntegrationTests.DataPipeline.NetFramework.csproj
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@@ -1,6 +1,6 @@
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diff --git a/sdk/test/Services/DataPipeline/UnitTests/AWSSDK.UnitTests.DataPipeline.NetFramework.csproj b/sdk/test/Services/DataPipeline/UnitTests/AWSSDK.UnitTests.DataPipeline.NetFramework.csproj
index cce8133c133e..ae293067fbd5 100644
--- a/sdk/test/Services/DataPipeline/UnitTests/AWSSDK.UnitTests.DataPipeline.NetFramework.csproj
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@@ -1,7 +1,7 @@
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@@ -19,6 +19,7 @@
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+    <LangVersion>9.0</LangVersion>
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diff --git a/sdk/test/Services/DataSync/UnitTests/AWSSDK.UnitTests.DataSync.NetFramework.csproj b/sdk/test/Services/DataSync/UnitTests/AWSSDK.UnitTests.DataSync.NetFramework.csproj
index c73e28bd181d..1d6c9de37d69 100644
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diff --git a/sdk/test/Services/DataZone/UnitTests/AWSSDK.UnitTests.DataZone.NetFramework.csproj b/sdk/test/Services/DataZone/UnitTests/AWSSDK.UnitTests.DataZone.NetFramework.csproj
index ca345fe88b99..918386c7f0d3 100644
--- a/sdk/test/Services/DataZone/UnitTests/AWSSDK.UnitTests.DataZone.NetFramework.csproj
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diff --git a/sdk/test/Services/DatabaseMigrationService/IntegrationTests/AWSSDK.IntegrationTests.DatabaseMigrationService.NetFramework.csproj b/sdk/test/Services/DatabaseMigrationService/IntegrationTests/AWSSDK.IntegrationTests.DatabaseMigrationService.NetFramework.csproj
index d1234da7c51a..7f17e1044ce6 100644
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@@ -1,6 +1,6 @@
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     <GenerateDocumentationFile>false</GenerateDocumentationFile>
diff --git a/sdk/test/Services/DatabaseMigrationService/UnitTests/AWSSDK.UnitTests.DatabaseMigrationService.NetFramework.csproj b/sdk/test/Services/DatabaseMigrationService/UnitTests/AWSSDK.UnitTests.DatabaseMigrationService.NetFramework.csproj
index efe02a6fdecc..da1fee357a28 100644
--- a/sdk/test/Services/DatabaseMigrationService/UnitTests/AWSSDK.UnitTests.DatabaseMigrationService.NetFramework.csproj
+++ b/sdk/test/Services/DatabaseMigrationService/UnitTests/AWSSDK.UnitTests.DatabaseMigrationService.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);TRACE;BCL;ASYNC_AWAIT;DEBUG</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CS1591,CS0612,CS0618</NoWarn>
   </PropertyGroup>
   <ItemGroup>
diff --git a/sdk/test/Services/Deadline/UnitTests/AWSSDK.UnitTests.Deadline.NetFramework.csproj b/sdk/test/Services/Deadline/UnitTests/AWSSDK.UnitTests.Deadline.NetFramework.csproj
index eabfb4adfb58..9b2149f7f5a6 100644
--- a/sdk/test/Services/Deadline/UnitTests/AWSSDK.UnitTests.Deadline.NetFramework.csproj
+++ b/sdk/test/Services/Deadline/UnitTests/AWSSDK.UnitTests.Deadline.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);TRACE;BCL;ASYNC_AWAIT;DEBUG</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CS1591,CS0612,CS0618</NoWarn>
   </PropertyGroup>
   <ItemGroup>
diff --git a/sdk/test/Services/Detective/UnitTests/AWSSDK.UnitTests.Detective.NetFramework.csproj b/sdk/test/Services/Detective/UnitTests/AWSSDK.UnitTests.Detective.NetFramework.csproj
index 15dc9e4710e4..31e3ecf0235c 100644
--- a/sdk/test/Services/Detective/UnitTests/AWSSDK.UnitTests.Detective.NetFramework.csproj
+++ b/sdk/test/Services/Detective/UnitTests/AWSSDK.UnitTests.Detective.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);TRACE;BCL;ASYNC_AWAIT;DEBUG</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CS1591,CS0612,CS0618</NoWarn>
   </PropertyGroup>
   <ItemGroup>
diff --git a/sdk/test/Services/DevOpsGuru/UnitTests/AWSSDK.UnitTests.DevOpsGuru.NetFramework.csproj b/sdk/test/Services/DevOpsGuru/UnitTests/AWSSDK.UnitTests.DevOpsGuru.NetFramework.csproj
index 458738d822ad..ca0778736a8e 100644
--- a/sdk/test/Services/DevOpsGuru/UnitTests/AWSSDK.UnitTests.DevOpsGuru.NetFramework.csproj
+++ b/sdk/test/Services/DevOpsGuru/UnitTests/AWSSDK.UnitTests.DevOpsGuru.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);TRACE;BCL;ASYNC_AWAIT;DEBUG</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CS1591,CS0612,CS0618</NoWarn>
   </PropertyGroup>
   <ItemGroup>
diff --git a/sdk/test/Services/DeviceFarm/UnitTests/AWSSDK.UnitTests.DeviceFarm.NetFramework.csproj b/sdk/test/Services/DeviceFarm/UnitTests/AWSSDK.UnitTests.DeviceFarm.NetFramework.csproj
index 47054b836c23..8a718de6c029 100644
--- a/sdk/test/Services/DeviceFarm/UnitTests/AWSSDK.UnitTests.DeviceFarm.NetFramework.csproj
+++ b/sdk/test/Services/DeviceFarm/UnitTests/AWSSDK.UnitTests.DeviceFarm.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);TRACE;BCL;ASYNC_AWAIT;DEBUG</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CS1591,CS0612,CS0618</NoWarn>
   </PropertyGroup>
   <ItemGroup>
diff --git a/sdk/test/Services/DirectConnect/IntegrationTests/AWSSDK.IntegrationTests.DirectConnect.NetFramework.csproj b/sdk/test/Services/DirectConnect/IntegrationTests/AWSSDK.IntegrationTests.DirectConnect.NetFramework.csproj
index 15ef8740b890..2b5e0f22acf0 100644
--- a/sdk/test/Services/DirectConnect/IntegrationTests/AWSSDK.IntegrationTests.DirectConnect.NetFramework.csproj
+++ b/sdk/test/Services/DirectConnect/IntegrationTests/AWSSDK.IntegrationTests.DirectConnect.NetFramework.csproj
@@ -1,6 +1,6 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);DEBUG;TRACE;BCL;ASYNC_AWAIT;LOCAL_FILE</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>false</GenerateDocumentationFile>
diff --git a/sdk/test/Services/DirectConnect/UnitTests/AWSSDK.UnitTests.DirectConnect.NetFramework.csproj b/sdk/test/Services/DirectConnect/UnitTests/AWSSDK.UnitTests.DirectConnect.NetFramework.csproj
index 69b1a75b676c..0359a0b71669 100644
--- a/sdk/test/Services/DirectConnect/UnitTests/AWSSDK.UnitTests.DirectConnect.NetFramework.csproj
+++ b/sdk/test/Services/DirectConnect/UnitTests/AWSSDK.UnitTests.DirectConnect.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);TRACE;BCL;ASYNC_AWAIT;DEBUG</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CS1591,CS0612,CS0618</NoWarn>
   </PropertyGroup>
   <ItemGroup>
diff --git a/sdk/test/Services/DirectoryService/IntegrationTests/AWSSDK.IntegrationTests.DirectoryService.NetFramework.csproj b/sdk/test/Services/DirectoryService/IntegrationTests/AWSSDK.IntegrationTests.DirectoryService.NetFramework.csproj
index 8ab1232ebca6..02f242ceb8c3 100644
--- a/sdk/test/Services/DirectoryService/IntegrationTests/AWSSDK.IntegrationTests.DirectoryService.NetFramework.csproj
+++ b/sdk/test/Services/DirectoryService/IntegrationTests/AWSSDK.IntegrationTests.DirectoryService.NetFramework.csproj
@@ -1,6 +1,6 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);DEBUG;TRACE;BCL;ASYNC_AWAIT;LOCAL_FILE</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>false</GenerateDocumentationFile>
diff --git a/sdk/test/Services/DirectoryService/UnitTests/AWSSDK.UnitTests.DirectoryService.NetFramework.csproj b/sdk/test/Services/DirectoryService/UnitTests/AWSSDK.UnitTests.DirectoryService.NetFramework.csproj
index cd819190f6dc..d7899a13675f 100644
--- a/sdk/test/Services/DirectoryService/UnitTests/AWSSDK.UnitTests.DirectoryService.NetFramework.csproj
+++ b/sdk/test/Services/DirectoryService/UnitTests/AWSSDK.UnitTests.DirectoryService.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);TRACE;BCL;ASYNC_AWAIT;DEBUG</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CS1591,CS0612,CS0618</NoWarn>
   </PropertyGroup>
   <ItemGroup>
diff --git a/sdk/test/Services/DocDB/UnitTests/AWSSDK.UnitTests.DocDB.NetFramework.csproj b/sdk/test/Services/DocDB/UnitTests/AWSSDK.UnitTests.DocDB.NetFramework.csproj
index e12e2001d937..e4ac32508fce 100644
--- a/sdk/test/Services/DocDB/UnitTests/AWSSDK.UnitTests.DocDB.NetFramework.csproj
+++ b/sdk/test/Services/DocDB/UnitTests/AWSSDK.UnitTests.DocDB.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);TRACE;BCL;ASYNC_AWAIT;DEBUG</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CS1591,CS0612,CS0618</NoWarn>
   </PropertyGroup>
   <ItemGroup>
diff --git a/sdk/test/Services/DocDBElastic/UnitTests/AWSSDK.UnitTests.DocDBElastic.NetFramework.csproj b/sdk/test/Services/DocDBElastic/UnitTests/AWSSDK.UnitTests.DocDBElastic.NetFramework.csproj
index b3c46f2ee474..98c2a44bee54 100644
--- a/sdk/test/Services/DocDBElastic/UnitTests/AWSSDK.UnitTests.DocDBElastic.NetFramework.csproj
+++ b/sdk/test/Services/DocDBElastic/UnitTests/AWSSDK.UnitTests.DocDBElastic.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);TRACE;BCL;ASYNC_AWAIT;DEBUG</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CS1591,CS0612,CS0618</NoWarn>
   </PropertyGroup>
   <ItemGroup>
diff --git a/sdk/test/Services/DocumentTypesTest/AWSSDK.DocumentTypesTest.NetFramework.csproj b/sdk/test/Services/DocumentTypesTest/AWSSDK.DocumentTypesTest.NetFramework.csproj
index 4aa7dc3fa124..b72663821162 100644
--- a/sdk/test/Services/DocumentTypesTest/AWSSDK.DocumentTypesTest.NetFramework.csproj
+++ b/sdk/test/Services/DocumentTypesTest/AWSSDK.DocumentTypesTest.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);BCL;AWS_ASYNC_API;CODE_ANALYSIS</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(RuleSetFileForBuild)' == 'false' Or '$(RuleSetFileForBuild)' == '' ">
diff --git a/sdk/test/Services/DocumentTypesTest/AWSSDK.DocumentTypesTest.NetStandard.csproj b/sdk/test/Services/DocumentTypesTest/AWSSDK.DocumentTypesTest.NetStandard.csproj
index 9517d65f8a23..bdd07a7b3569 100644
--- a/sdk/test/Services/DocumentTypesTest/AWSSDK.DocumentTypesTest.NetStandard.csproj
+++ b/sdk/test/Services/DocumentTypesTest/AWSSDK.DocumentTypesTest.NetStandard.csproj
@@ -22,6 +22,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <!-- Async Enumerable Compatibility -->
diff --git a/sdk/test/Services/DocumentTypesTest/Generated/AmazonDocumentTypesTestConfig.cs b/sdk/test/Services/DocumentTypesTest/Generated/AmazonDocumentTypesTestConfig.cs
index c601727fad38..bda4084f706e 100644
--- a/sdk/test/Services/DocumentTypesTest/Generated/AmazonDocumentTypesTestConfig.cs
+++ b/sdk/test/Services/DocumentTypesTest/Generated/AmazonDocumentTypesTestConfig.cs
@@ -34,7 +34,7 @@ namespace Amazon.DocumentTypesTest
     public partial class AmazonDocumentTypesTestConfig : ClientConfig
     {
         private static readonly string UserAgentString =
-            InternalSDKUtils.BuildUserAgentString("Document-Types-Test", "3.3");
+            InternalSDKUtils.BuildUserAgentString("Document-Types-Test", "4.0");
 
 
         private string _userAgent = UserAgentString;
diff --git a/sdk/test/Services/DocumentTypesTest/Properties/AssemblyInfo.cs b/sdk/test/Services/DocumentTypesTest/Properties/AssemblyInfo.cs
index 780d293f8def..1aef2763ae24 100644
--- a/sdk/test/Services/DocumentTypesTest/Properties/AssemblyInfo.cs
+++ b/sdk/test/Services/DocumentTypesTest/Properties/AssemblyInfo.cs
@@ -41,5 +41,9 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.3")]
\ No newline at end of file
+#if BCL
+[assembly: AssemblyVersion("4.0")]
+#else
+[assembly: AssemblyVersion("4.0")]
+#endif
+[assembly: AssemblyFileVersion("4.0")]
\ No newline at end of file
diff --git a/sdk/test/Services/DocumentTypesTest/UnitTests/AWSSDK.UnitTests.DocumentTypesTest.NetFramework.csproj b/sdk/test/Services/DocumentTypesTest/UnitTests/AWSSDK.UnitTests.DocumentTypesTest.NetFramework.csproj
index 8d50d2975295..bf0b6ee0d454 100644
--- a/sdk/test/Services/DocumentTypesTest/UnitTests/AWSSDK.UnitTests.DocumentTypesTest.NetFramework.csproj
+++ b/sdk/test/Services/DocumentTypesTest/UnitTests/AWSSDK.UnitTests.DocumentTypesTest.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);TRACE;BCL;ASYNC_AWAIT;DEBUG</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CS1591,CS0612,CS0618</NoWarn>
   </PropertyGroup>
   <ItemGroup>
diff --git a/sdk/test/Services/Drs/UnitTests/AWSSDK.UnitTests.Drs.NetFramework.csproj b/sdk/test/Services/Drs/UnitTests/AWSSDK.UnitTests.Drs.NetFramework.csproj
index 7a788b359b0d..947ad7cce424 100644
--- a/sdk/test/Services/Drs/UnitTests/AWSSDK.UnitTests.Drs.NetFramework.csproj
+++ b/sdk/test/Services/Drs/UnitTests/AWSSDK.UnitTests.Drs.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);TRACE;BCL;ASYNC_AWAIT;DEBUG</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CS1591,CS0612,CS0618</NoWarn>
   </PropertyGroup>
   <ItemGroup>
diff --git a/sdk/test/Services/DynamoDBv2/IntegrationTests/AWSSDK.IntegrationTests.DynamoDBv2.NetFramework.csproj b/sdk/test/Services/DynamoDBv2/IntegrationTests/AWSSDK.IntegrationTests.DynamoDBv2.NetFramework.csproj
index 0882e932656e..73198fa222b8 100644
--- a/sdk/test/Services/DynamoDBv2/IntegrationTests/AWSSDK.IntegrationTests.DynamoDBv2.NetFramework.csproj
+++ b/sdk/test/Services/DynamoDBv2/IntegrationTests/AWSSDK.IntegrationTests.DynamoDBv2.NetFramework.csproj
@@ -1,6 +1,6 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);DEBUG;TRACE;BCL;ASYNC_AWAIT;LOCAL_FILE</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>false</GenerateDocumentationFile>
diff --git a/sdk/test/Services/DynamoDBv2/UnitTests/AWSSDK.UnitTests.DynamoDBv2.NetFramework.csproj b/sdk/test/Services/DynamoDBv2/UnitTests/AWSSDK.UnitTests.DynamoDBv2.NetFramework.csproj
index a02911ffc72d..8076e799b6a8 100644
--- a/sdk/test/Services/DynamoDBv2/UnitTests/AWSSDK.UnitTests.DynamoDBv2.NetFramework.csproj
+++ b/sdk/test/Services/DynamoDBv2/UnitTests/AWSSDK.UnitTests.DynamoDBv2.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);TRACE;BCL;ASYNC_AWAIT;DEBUG</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CS1591,CS0612,CS0618</NoWarn>
   </PropertyGroup>
   <ItemGroup>
diff --git a/sdk/test/Services/EBS/UnitTests/AWSSDK.UnitTests.EBS.NetFramework.csproj b/sdk/test/Services/EBS/UnitTests/AWSSDK.UnitTests.EBS.NetFramework.csproj
index 52118ac566ae..7ba3b35d5024 100644
--- a/sdk/test/Services/EBS/UnitTests/AWSSDK.UnitTests.EBS.NetFramework.csproj
+++ b/sdk/test/Services/EBS/UnitTests/AWSSDK.UnitTests.EBS.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);TRACE;BCL;ASYNC_AWAIT;DEBUG</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CS1591,CS0612,CS0618</NoWarn>
   </PropertyGroup>
   <ItemGroup>
diff --git a/sdk/test/Services/EC2/IntegrationTests/AWSSDK.IntegrationTests.EC2.NetFramework.csproj b/sdk/test/Services/EC2/IntegrationTests/AWSSDK.IntegrationTests.EC2.NetFramework.csproj
index 26e90adc8e1b..e45a7b722523 100644
--- a/sdk/test/Services/EC2/IntegrationTests/AWSSDK.IntegrationTests.EC2.NetFramework.csproj
+++ b/sdk/test/Services/EC2/IntegrationTests/AWSSDK.IntegrationTests.EC2.NetFramework.csproj
@@ -1,6 +1,6 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);DEBUG;TRACE;BCL;ASYNC_AWAIT;LOCAL_FILE</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>false</GenerateDocumentationFile>
diff --git a/sdk/test/Services/EC2/UnitTests/AWSSDK.UnitTests.EC2.NetFramework.csproj b/sdk/test/Services/EC2/UnitTests/AWSSDK.UnitTests.EC2.NetFramework.csproj
index 135e7052a9d8..a940446886dd 100644
--- a/sdk/test/Services/EC2/UnitTests/AWSSDK.UnitTests.EC2.NetFramework.csproj
+++ b/sdk/test/Services/EC2/UnitTests/AWSSDK.UnitTests.EC2.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);TRACE;BCL;ASYNC_AWAIT;DEBUG</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CS1591,CS0612,CS0618</NoWarn>
   </PropertyGroup>
   <ItemGroup>
diff --git a/sdk/test/Services/EC2InstanceConnect/UnitTests/AWSSDK.UnitTests.EC2InstanceConnect.NetFramework.csproj b/sdk/test/Services/EC2InstanceConnect/UnitTests/AWSSDK.UnitTests.EC2InstanceConnect.NetFramework.csproj
index 4083b12426a4..fa7741e2666d 100644
--- a/sdk/test/Services/EC2InstanceConnect/UnitTests/AWSSDK.UnitTests.EC2InstanceConnect.NetFramework.csproj
+++ b/sdk/test/Services/EC2InstanceConnect/UnitTests/AWSSDK.UnitTests.EC2InstanceConnect.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);TRACE;BCL;ASYNC_AWAIT;DEBUG</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CS1591,CS0612,CS0618</NoWarn>
   </PropertyGroup>
   <ItemGroup>
diff --git a/sdk/test/Services/EC2Protocol/AWSSDK.EC2Protocol.NetFramework.csproj b/sdk/test/Services/EC2Protocol/AWSSDK.EC2Protocol.NetFramework.csproj
index 6cf86b841a9c..4f7b0717ae3a 100644
--- a/sdk/test/Services/EC2Protocol/AWSSDK.EC2Protocol.NetFramework.csproj
+++ b/sdk/test/Services/EC2Protocol/AWSSDK.EC2Protocol.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);BCL;AWS_ASYNC_API;CODE_ANALYSIS</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(RuleSetFileForBuild)' == 'false' Or '$(RuleSetFileForBuild)' == '' ">
diff --git a/sdk/test/Services/EC2Protocol/AWSSDK.EC2Protocol.NetStandard.csproj b/sdk/test/Services/EC2Protocol/AWSSDK.EC2Protocol.NetStandard.csproj
index 4a3b3245f740..8f042e4183a2 100644
--- a/sdk/test/Services/EC2Protocol/AWSSDK.EC2Protocol.NetStandard.csproj
+++ b/sdk/test/Services/EC2Protocol/AWSSDK.EC2Protocol.NetStandard.csproj
@@ -22,6 +22,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <!-- Async Enumerable Compatibility -->
diff --git a/sdk/test/Services/EC2Protocol/Generated/AmazonEC2ProtocolConfig.cs b/sdk/test/Services/EC2Protocol/Generated/AmazonEC2ProtocolConfig.cs
index 06071fb0225d..e292d25930e4 100644
--- a/sdk/test/Services/EC2Protocol/Generated/AmazonEC2ProtocolConfig.cs
+++ b/sdk/test/Services/EC2Protocol/Generated/AmazonEC2ProtocolConfig.cs
@@ -34,7 +34,7 @@ namespace Amazon.EC2Protocol
     public partial class AmazonEC2ProtocolConfig : ClientConfig
     {
         private static readonly string UserAgentString =
-            InternalSDKUtils.BuildUserAgentString("EC2 Protocol", "3.3");
+            InternalSDKUtils.BuildUserAgentString("EC2 Protocol", "4.0");
 
 
         private string _userAgent = UserAgentString;
diff --git a/sdk/test/Services/EC2Protocol/Properties/AssemblyInfo.cs b/sdk/test/Services/EC2Protocol/Properties/AssemblyInfo.cs
index b5df08fae5da..e3c601945d44 100644
--- a/sdk/test/Services/EC2Protocol/Properties/AssemblyInfo.cs
+++ b/sdk/test/Services/EC2Protocol/Properties/AssemblyInfo.cs
@@ -41,5 +41,9 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.3")]
\ No newline at end of file
+#if BCL
+[assembly: AssemblyVersion("4.0")]
+#else
+[assembly: AssemblyVersion("4.0")]
+#endif
+[assembly: AssemblyFileVersion("4.0")]
\ No newline at end of file
diff --git a/sdk/test/Services/EC2Protocol/UnitTests/AWSSDK.UnitTests.EC2Protocol.NetFramework.csproj b/sdk/test/Services/EC2Protocol/UnitTests/AWSSDK.UnitTests.EC2Protocol.NetFramework.csproj
index 4248f62565c2..84876b67a129 100644
--- a/sdk/test/Services/EC2Protocol/UnitTests/AWSSDK.UnitTests.EC2Protocol.NetFramework.csproj
+++ b/sdk/test/Services/EC2Protocol/UnitTests/AWSSDK.UnitTests.EC2Protocol.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);TRACE;BCL;ASYNC_AWAIT;DEBUG</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CS1591,CS0612,CS0618</NoWarn>
   </PropertyGroup>
   <ItemGroup>
diff --git a/sdk/test/Services/ECR/IntegrationTests/AWSSDK.IntegrationTests.ECR.NetFramework.csproj b/sdk/test/Services/ECR/IntegrationTests/AWSSDK.IntegrationTests.ECR.NetFramework.csproj
index 55afa1fb9f34..b2b90bb0080f 100644
--- a/sdk/test/Services/ECR/IntegrationTests/AWSSDK.IntegrationTests.ECR.NetFramework.csproj
+++ b/sdk/test/Services/ECR/IntegrationTests/AWSSDK.IntegrationTests.ECR.NetFramework.csproj
@@ -1,6 +1,6 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);DEBUG;TRACE;BCL;ASYNC_AWAIT;LOCAL_FILE</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>false</GenerateDocumentationFile>
diff --git a/sdk/test/Services/ECR/UnitTests/AWSSDK.UnitTests.ECR.NetFramework.csproj b/sdk/test/Services/ECR/UnitTests/AWSSDK.UnitTests.ECR.NetFramework.csproj
index 4ceb1d58cd48..b99a335b0276 100644
--- a/sdk/test/Services/ECR/UnitTests/AWSSDK.UnitTests.ECR.NetFramework.csproj
+++ b/sdk/test/Services/ECR/UnitTests/AWSSDK.UnitTests.ECR.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);TRACE;BCL;ASYNC_AWAIT;DEBUG</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CS1591,CS0612,CS0618</NoWarn>
   </PropertyGroup>
   <ItemGroup>
diff --git a/sdk/test/Services/ECRPublic/UnitTests/AWSSDK.UnitTests.ECRPublic.NetFramework.csproj b/sdk/test/Services/ECRPublic/UnitTests/AWSSDK.UnitTests.ECRPublic.NetFramework.csproj
index 6118d4d7d13e..742c6d91ead9 100644
--- a/sdk/test/Services/ECRPublic/UnitTests/AWSSDK.UnitTests.ECRPublic.NetFramework.csproj
+++ b/sdk/test/Services/ECRPublic/UnitTests/AWSSDK.UnitTests.ECRPublic.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);TRACE;BCL;ASYNC_AWAIT;DEBUG</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CS1591,CS0612,CS0618</NoWarn>
   </PropertyGroup>
   <ItemGroup>
diff --git a/sdk/test/Services/ECS/IntegrationTests/AWSSDK.IntegrationTests.ECS.NetFramework.csproj b/sdk/test/Services/ECS/IntegrationTests/AWSSDK.IntegrationTests.ECS.NetFramework.csproj
index 44e5fe1dc699..d5293d7c2197 100644
--- a/sdk/test/Services/ECS/IntegrationTests/AWSSDK.IntegrationTests.ECS.NetFramework.csproj
+++ b/sdk/test/Services/ECS/IntegrationTests/AWSSDK.IntegrationTests.ECS.NetFramework.csproj
@@ -1,6 +1,6 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);DEBUG;TRACE;BCL;ASYNC_AWAIT;LOCAL_FILE</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>false</GenerateDocumentationFile>
diff --git a/sdk/test/Services/ECS/UnitTests/AWSSDK.UnitTests.ECS.NetFramework.csproj b/sdk/test/Services/ECS/UnitTests/AWSSDK.UnitTests.ECS.NetFramework.csproj
index 9ea16968e5d8..0c581ecd0386 100644
--- a/sdk/test/Services/ECS/UnitTests/AWSSDK.UnitTests.ECS.NetFramework.csproj
+++ b/sdk/test/Services/ECS/UnitTests/AWSSDK.UnitTests.ECS.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);TRACE;BCL;ASYNC_AWAIT;DEBUG</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CS1591,CS0612,CS0618</NoWarn>
   </PropertyGroup>
   <ItemGroup>
diff --git a/sdk/test/Services/EKS/UnitTests/AWSSDK.UnitTests.EKS.NetFramework.csproj b/sdk/test/Services/EKS/UnitTests/AWSSDK.UnitTests.EKS.NetFramework.csproj
index 76fddbf58889..b6200e53931d 100644
--- a/sdk/test/Services/EKS/UnitTests/AWSSDK.UnitTests.EKS.NetFramework.csproj
+++ b/sdk/test/Services/EKS/UnitTests/AWSSDK.UnitTests.EKS.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);TRACE;BCL;ASYNC_AWAIT;DEBUG</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CS1591,CS0612,CS0618</NoWarn>
   </PropertyGroup>
   <ItemGroup>
diff --git a/sdk/test/Services/EKSAuth/UnitTests/AWSSDK.UnitTests.EKSAuth.NetFramework.csproj b/sdk/test/Services/EKSAuth/UnitTests/AWSSDK.UnitTests.EKSAuth.NetFramework.csproj
index ee3b2d3b4cd4..acd80d502daa 100644
--- a/sdk/test/Services/EKSAuth/UnitTests/AWSSDK.UnitTests.EKSAuth.NetFramework.csproj
+++ b/sdk/test/Services/EKSAuth/UnitTests/AWSSDK.UnitTests.EKSAuth.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);TRACE;BCL;ASYNC_AWAIT;DEBUG</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CS1591,CS0612,CS0618</NoWarn>
   </PropertyGroup>
   <ItemGroup>
diff --git a/sdk/test/Services/EMRContainers/UnitTests/AWSSDK.UnitTests.EMRContainers.NetFramework.csproj b/sdk/test/Services/EMRContainers/UnitTests/AWSSDK.UnitTests.EMRContainers.NetFramework.csproj
index e3a7bc97133c..9103cdc04b42 100644
--- a/sdk/test/Services/EMRContainers/UnitTests/AWSSDK.UnitTests.EMRContainers.NetFramework.csproj
+++ b/sdk/test/Services/EMRContainers/UnitTests/AWSSDK.UnitTests.EMRContainers.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);TRACE;BCL;ASYNC_AWAIT;DEBUG</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CS1591,CS0612,CS0618</NoWarn>
   </PropertyGroup>
   <ItemGroup>
diff --git a/sdk/test/Services/EMRServerless/UnitTests/AWSSDK.UnitTests.EMRServerless.NetFramework.csproj b/sdk/test/Services/EMRServerless/UnitTests/AWSSDK.UnitTests.EMRServerless.NetFramework.csproj
index fe6a192649aa..979258face68 100644
--- a/sdk/test/Services/EMRServerless/UnitTests/AWSSDK.UnitTests.EMRServerless.NetFramework.csproj
+++ b/sdk/test/Services/EMRServerless/UnitTests/AWSSDK.UnitTests.EMRServerless.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);TRACE;BCL;ASYNC_AWAIT;DEBUG</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CS1591,CS0612,CS0618</NoWarn>
   </PropertyGroup>
   <ItemGroup>
diff --git a/sdk/test/Services/ElastiCache/IntegrationTests/AWSSDK.IntegrationTests.ElastiCache.NetFramework.csproj b/sdk/test/Services/ElastiCache/IntegrationTests/AWSSDK.IntegrationTests.ElastiCache.NetFramework.csproj
index 21b3dd3e39dd..9d81cbcaebe5 100644
--- a/sdk/test/Services/ElastiCache/IntegrationTests/AWSSDK.IntegrationTests.ElastiCache.NetFramework.csproj
+++ b/sdk/test/Services/ElastiCache/IntegrationTests/AWSSDK.IntegrationTests.ElastiCache.NetFramework.csproj
@@ -1,6 +1,6 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);DEBUG;TRACE;BCL;ASYNC_AWAIT;LOCAL_FILE</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>false</GenerateDocumentationFile>
diff --git a/sdk/test/Services/ElastiCache/UnitTests/AWSSDK.UnitTests.ElastiCache.NetFramework.csproj b/sdk/test/Services/ElastiCache/UnitTests/AWSSDK.UnitTests.ElastiCache.NetFramework.csproj
index 095c9df52548..4c6e870ce78c 100644
--- a/sdk/test/Services/ElastiCache/UnitTests/AWSSDK.UnitTests.ElastiCache.NetFramework.csproj
+++ b/sdk/test/Services/ElastiCache/UnitTests/AWSSDK.UnitTests.ElastiCache.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);TRACE;BCL;ASYNC_AWAIT;DEBUG</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CS1591,CS0612,CS0618</NoWarn>
   </PropertyGroup>
   <ItemGroup>
diff --git a/sdk/test/Services/ElasticBeanstalk/IntegrationTests/AWSSDK.IntegrationTests.ElasticBeanstalk.NetFramework.csproj b/sdk/test/Services/ElasticBeanstalk/IntegrationTests/AWSSDK.IntegrationTests.ElasticBeanstalk.NetFramework.csproj
index a9699d881a23..d12bd36278bc 100644
--- a/sdk/test/Services/ElasticBeanstalk/IntegrationTests/AWSSDK.IntegrationTests.ElasticBeanstalk.NetFramework.csproj
+++ b/sdk/test/Services/ElasticBeanstalk/IntegrationTests/AWSSDK.IntegrationTests.ElasticBeanstalk.NetFramework.csproj
@@ -1,6 +1,6 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);DEBUG;TRACE;BCL;ASYNC_AWAIT;LOCAL_FILE</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>false</GenerateDocumentationFile>
diff --git a/sdk/test/Services/ElasticBeanstalk/UnitTests/AWSSDK.UnitTests.ElasticBeanstalk.NetFramework.csproj b/sdk/test/Services/ElasticBeanstalk/UnitTests/AWSSDK.UnitTests.ElasticBeanstalk.NetFramework.csproj
index da6ec2618854..04933b798a4c 100644
--- a/sdk/test/Services/ElasticBeanstalk/UnitTests/AWSSDK.UnitTests.ElasticBeanstalk.NetFramework.csproj
+++ b/sdk/test/Services/ElasticBeanstalk/UnitTests/AWSSDK.UnitTests.ElasticBeanstalk.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);TRACE;BCL;ASYNC_AWAIT;DEBUG</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CS1591,CS0612,CS0618</NoWarn>
   </PropertyGroup>
   <ItemGroup>
diff --git a/sdk/test/Services/ElasticFileSystem/UnitTests/AWSSDK.UnitTests.ElasticFileSystem.NetFramework.csproj b/sdk/test/Services/ElasticFileSystem/UnitTests/AWSSDK.UnitTests.ElasticFileSystem.NetFramework.csproj
index 7a45ab69d4a7..959365701024 100644
--- a/sdk/test/Services/ElasticFileSystem/UnitTests/AWSSDK.UnitTests.ElasticFileSystem.NetFramework.csproj
+++ b/sdk/test/Services/ElasticFileSystem/UnitTests/AWSSDK.UnitTests.ElasticFileSystem.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);TRACE;BCL;ASYNC_AWAIT;DEBUG</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CS1591,CS0612,CS0618</NoWarn>
   </PropertyGroup>
   <ItemGroup>
diff --git a/sdk/test/Services/ElasticInference/UnitTests/AWSSDK.UnitTests.ElasticInference.NetFramework.csproj b/sdk/test/Services/ElasticInference/UnitTests/AWSSDK.UnitTests.ElasticInference.NetFramework.csproj
index ccc3ac4fdc71..1ff76a846a75 100644
--- a/sdk/test/Services/ElasticInference/UnitTests/AWSSDK.UnitTests.ElasticInference.NetFramework.csproj
+++ b/sdk/test/Services/ElasticInference/UnitTests/AWSSDK.UnitTests.ElasticInference.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);TRACE;BCL;ASYNC_AWAIT;DEBUG</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CS1591,CS0612,CS0618</NoWarn>
   </PropertyGroup>
   <ItemGroup>
diff --git a/sdk/test/Services/ElasticLoadBalancing/IntegrationTests/AWSSDK.IntegrationTests.ElasticLoadBalancing.NetFramework.csproj b/sdk/test/Services/ElasticLoadBalancing/IntegrationTests/AWSSDK.IntegrationTests.ElasticLoadBalancing.NetFramework.csproj
index 840d6584ec1a..30251f2f420e 100644
--- a/sdk/test/Services/ElasticLoadBalancing/IntegrationTests/AWSSDK.IntegrationTests.ElasticLoadBalancing.NetFramework.csproj
+++ b/sdk/test/Services/ElasticLoadBalancing/IntegrationTests/AWSSDK.IntegrationTests.ElasticLoadBalancing.NetFramework.csproj
@@ -1,6 +1,6 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);DEBUG;TRACE;BCL;ASYNC_AWAIT;LOCAL_FILE</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>false</GenerateDocumentationFile>
diff --git a/sdk/test/Services/ElasticLoadBalancing/UnitTests/AWSSDK.UnitTests.ElasticLoadBalancing.NetFramework.csproj b/sdk/test/Services/ElasticLoadBalancing/UnitTests/AWSSDK.UnitTests.ElasticLoadBalancing.NetFramework.csproj
index c81d87d7589e..62d9da18cb47 100644
--- a/sdk/test/Services/ElasticLoadBalancing/UnitTests/AWSSDK.UnitTests.ElasticLoadBalancing.NetFramework.csproj
+++ b/sdk/test/Services/ElasticLoadBalancing/UnitTests/AWSSDK.UnitTests.ElasticLoadBalancing.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);TRACE;BCL;ASYNC_AWAIT;DEBUG</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CS1591,CS0612,CS0618</NoWarn>
   </PropertyGroup>
   <ItemGroup>
diff --git a/sdk/test/Services/ElasticLoadBalancingV2/IntegrationTests/AWSSDK.IntegrationTests.ElasticLoadBalancingV2.NetFramework.csproj b/sdk/test/Services/ElasticLoadBalancingV2/IntegrationTests/AWSSDK.IntegrationTests.ElasticLoadBalancingV2.NetFramework.csproj
index 7c0d44d9d6d2..9d57895879a5 100644
--- a/sdk/test/Services/ElasticLoadBalancingV2/IntegrationTests/AWSSDK.IntegrationTests.ElasticLoadBalancingV2.NetFramework.csproj
+++ b/sdk/test/Services/ElasticLoadBalancingV2/IntegrationTests/AWSSDK.IntegrationTests.ElasticLoadBalancingV2.NetFramework.csproj
@@ -1,6 +1,6 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);DEBUG;TRACE;BCL;ASYNC_AWAIT;LOCAL_FILE</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>false</GenerateDocumentationFile>
diff --git a/sdk/test/Services/ElasticLoadBalancingV2/UnitTests/AWSSDK.UnitTests.ElasticLoadBalancingV2.NetFramework.csproj b/sdk/test/Services/ElasticLoadBalancingV2/UnitTests/AWSSDK.UnitTests.ElasticLoadBalancingV2.NetFramework.csproj
index 7a1b0855a530..bf2ee3cc2313 100644
--- a/sdk/test/Services/ElasticLoadBalancingV2/UnitTests/AWSSDK.UnitTests.ElasticLoadBalancingV2.NetFramework.csproj
+++ b/sdk/test/Services/ElasticLoadBalancingV2/UnitTests/AWSSDK.UnitTests.ElasticLoadBalancingV2.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);TRACE;BCL;ASYNC_AWAIT;DEBUG</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CS1591,CS0612,CS0618</NoWarn>
   </PropertyGroup>
   <ItemGroup>
diff --git a/sdk/test/Services/ElasticMapReduce/UnitTests/AWSSDK.UnitTests.ElasticMapReduce.NetFramework.csproj b/sdk/test/Services/ElasticMapReduce/UnitTests/AWSSDK.UnitTests.ElasticMapReduce.NetFramework.csproj
index a829d18232a5..81455fa12841 100644
--- a/sdk/test/Services/ElasticMapReduce/UnitTests/AWSSDK.UnitTests.ElasticMapReduce.NetFramework.csproj
+++ b/sdk/test/Services/ElasticMapReduce/UnitTests/AWSSDK.UnitTests.ElasticMapReduce.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);TRACE;BCL;ASYNC_AWAIT;DEBUG</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CS1591,CS0612,CS0618</NoWarn>
   </PropertyGroup>
   <ItemGroup>
diff --git a/sdk/test/Services/ElasticTranscoder/IntegrationTests/AWSSDK.IntegrationTests.ElasticTranscoder.NetFramework.csproj b/sdk/test/Services/ElasticTranscoder/IntegrationTests/AWSSDK.IntegrationTests.ElasticTranscoder.NetFramework.csproj
index 7e3a8f236b87..2b7e1ba2ce35 100644
--- a/sdk/test/Services/ElasticTranscoder/IntegrationTests/AWSSDK.IntegrationTests.ElasticTranscoder.NetFramework.csproj
+++ b/sdk/test/Services/ElasticTranscoder/IntegrationTests/AWSSDK.IntegrationTests.ElasticTranscoder.NetFramework.csproj
@@ -1,6 +1,6 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);DEBUG;TRACE;BCL;ASYNC_AWAIT;LOCAL_FILE</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>false</GenerateDocumentationFile>
diff --git a/sdk/test/Services/ElasticTranscoder/UnitTests/AWSSDK.UnitTests.ElasticTranscoder.NetFramework.csproj b/sdk/test/Services/ElasticTranscoder/UnitTests/AWSSDK.UnitTests.ElasticTranscoder.NetFramework.csproj
index 57481739b69e..7831c9e6bad5 100644
--- a/sdk/test/Services/ElasticTranscoder/UnitTests/AWSSDK.UnitTests.ElasticTranscoder.NetFramework.csproj
+++ b/sdk/test/Services/ElasticTranscoder/UnitTests/AWSSDK.UnitTests.ElasticTranscoder.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);TRACE;BCL;ASYNC_AWAIT;DEBUG</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CS1591,CS0612,CS0618</NoWarn>
   </PropertyGroup>
   <ItemGroup>
diff --git a/sdk/test/Services/Elasticsearch/IntegrationTests/AWSSDK.IntegrationTests.Elasticsearch.NetFramework.csproj b/sdk/test/Services/Elasticsearch/IntegrationTests/AWSSDK.IntegrationTests.Elasticsearch.NetFramework.csproj
index a0c84da9db1f..7af6827374ba 100644
--- a/sdk/test/Services/Elasticsearch/IntegrationTests/AWSSDK.IntegrationTests.Elasticsearch.NetFramework.csproj
+++ b/sdk/test/Services/Elasticsearch/IntegrationTests/AWSSDK.IntegrationTests.Elasticsearch.NetFramework.csproj
@@ -1,6 +1,6 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);DEBUG;TRACE;BCL;ASYNC_AWAIT;LOCAL_FILE</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>false</GenerateDocumentationFile>
diff --git a/sdk/test/Services/Elasticsearch/UnitTests/AWSSDK.UnitTests.Elasticsearch.NetFramework.csproj b/sdk/test/Services/Elasticsearch/UnitTests/AWSSDK.UnitTests.Elasticsearch.NetFramework.csproj
index 0fb0e01d2b1a..44a575852e6e 100644
--- a/sdk/test/Services/Elasticsearch/UnitTests/AWSSDK.UnitTests.Elasticsearch.NetFramework.csproj
+++ b/sdk/test/Services/Elasticsearch/UnitTests/AWSSDK.UnitTests.Elasticsearch.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);TRACE;BCL;ASYNC_AWAIT;DEBUG</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CS1591,CS0612,CS0618</NoWarn>
   </PropertyGroup>
   <ItemGroup>
diff --git a/sdk/test/Services/EntityResolution/UnitTests/AWSSDK.UnitTests.EntityResolution.NetFramework.csproj b/sdk/test/Services/EntityResolution/UnitTests/AWSSDK.UnitTests.EntityResolution.NetFramework.csproj
index 336b019385e4..4a759576e214 100644
--- a/sdk/test/Services/EntityResolution/UnitTests/AWSSDK.UnitTests.EntityResolution.NetFramework.csproj
+++ b/sdk/test/Services/EntityResolution/UnitTests/AWSSDK.UnitTests.EntityResolution.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);TRACE;BCL;ASYNC_AWAIT;DEBUG</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CS1591,CS0612,CS0618</NoWarn>
   </PropertyGroup>
   <ItemGroup>
diff --git a/sdk/test/Services/Ep2hostlabel/AWSSDK.Ep2hostlabel.NetFramework.csproj b/sdk/test/Services/Ep2hostlabel/AWSSDK.Ep2hostlabel.NetFramework.csproj
index 7d1ec5e4ea01..2872d29f642a 100644
--- a/sdk/test/Services/Ep2hostlabel/AWSSDK.Ep2hostlabel.NetFramework.csproj
+++ b/sdk/test/Services/Ep2hostlabel/AWSSDK.Ep2hostlabel.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);BCL;AWS_ASYNC_API;CODE_ANALYSIS</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(RuleSetFileForBuild)' == 'false' Or '$(RuleSetFileForBuild)' == '' ">
diff --git a/sdk/test/Services/Ep2hostlabel/AWSSDK.Ep2hostlabel.NetStandard.csproj b/sdk/test/Services/Ep2hostlabel/AWSSDK.Ep2hostlabel.NetStandard.csproj
index 2fe842119dcd..a0dd30dfc4fb 100644
--- a/sdk/test/Services/Ep2hostlabel/AWSSDK.Ep2hostlabel.NetStandard.csproj
+++ b/sdk/test/Services/Ep2hostlabel/AWSSDK.Ep2hostlabel.NetStandard.csproj
@@ -22,6 +22,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <!-- Async Enumerable Compatibility -->
diff --git a/sdk/test/Services/Ep2hostlabel/Generated/AmazonEp2hostlabelConfig.cs b/sdk/test/Services/Ep2hostlabel/Generated/AmazonEp2hostlabelConfig.cs
index 38447dcb1b8b..ca06a2d8e1f6 100644
--- a/sdk/test/Services/Ep2hostlabel/Generated/AmazonEp2hostlabelConfig.cs
+++ b/sdk/test/Services/Ep2hostlabel/Generated/AmazonEp2hostlabelConfig.cs
@@ -34,7 +34,7 @@ namespace Amazon.Ep2hostlabel
     public partial class AmazonEp2hostlabelConfig : ClientConfig
     {
         private static readonly string UserAgentString =
-            InternalSDKUtils.BuildUserAgentString("Ep2-host-label", "3.3");
+            InternalSDKUtils.BuildUserAgentString("Ep2-host-label", "4.0");
 
         private static readonly AmazonEp2hostlabelEndpointResolver EndpointResolver =
             new AmazonEp2hostlabelEndpointResolver();
diff --git a/sdk/test/Services/Ep2hostlabel/Properties/AssemblyInfo.cs b/sdk/test/Services/Ep2hostlabel/Properties/AssemblyInfo.cs
index ba93083c1e13..4bc7e10022e6 100644
--- a/sdk/test/Services/Ep2hostlabel/Properties/AssemblyInfo.cs
+++ b/sdk/test/Services/Ep2hostlabel/Properties/AssemblyInfo.cs
@@ -41,5 +41,9 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.3")]
\ No newline at end of file
+#if BCL
+[assembly: AssemblyVersion("4.0")]
+#else
+[assembly: AssemblyVersion("4.0")]
+#endif
+[assembly: AssemblyFileVersion("4.0")]
\ No newline at end of file
diff --git a/sdk/test/Services/Ep2hostlabel/UnitTests/AWSSDK.UnitTests.Ep2hostlabel.NetFramework.csproj b/sdk/test/Services/Ep2hostlabel/UnitTests/AWSSDK.UnitTests.Ep2hostlabel.NetFramework.csproj
index 399fe7d706fe..cf1fe271b658 100644
--- a/sdk/test/Services/Ep2hostlabel/UnitTests/AWSSDK.UnitTests.Ep2hostlabel.NetFramework.csproj
+++ b/sdk/test/Services/Ep2hostlabel/UnitTests/AWSSDK.UnitTests.Ep2hostlabel.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);TRACE;BCL;ASYNC_AWAIT;DEBUG</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CS1591,CS0612,CS0618</NoWarn>
   </PropertyGroup>
   <ItemGroup>
diff --git a/sdk/test/Services/Ep2parsearn/AWSSDK.Ep2parsearn.NetFramework.csproj b/sdk/test/Services/Ep2parsearn/AWSSDK.Ep2parsearn.NetFramework.csproj
index 4268b56ce062..31f0e529cedc 100644
--- a/sdk/test/Services/Ep2parsearn/AWSSDK.Ep2parsearn.NetFramework.csproj
+++ b/sdk/test/Services/Ep2parsearn/AWSSDK.Ep2parsearn.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);BCL;AWS_ASYNC_API;CODE_ANALYSIS</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(RuleSetFileForBuild)' == 'false' Or '$(RuleSetFileForBuild)' == '' ">
diff --git a/sdk/test/Services/Ep2parsearn/AWSSDK.Ep2parsearn.NetStandard.csproj b/sdk/test/Services/Ep2parsearn/AWSSDK.Ep2parsearn.NetStandard.csproj
index 9f8620c3654a..6f808cc3d2cb 100644
--- a/sdk/test/Services/Ep2parsearn/AWSSDK.Ep2parsearn.NetStandard.csproj
+++ b/sdk/test/Services/Ep2parsearn/AWSSDK.Ep2parsearn.NetStandard.csproj
@@ -22,6 +22,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <!-- Async Enumerable Compatibility -->
diff --git a/sdk/test/Services/Ep2parsearn/Generated/AmazonEp2parsearnConfig.cs b/sdk/test/Services/Ep2parsearn/Generated/AmazonEp2parsearnConfig.cs
index 52105b18e711..706066f89cd1 100644
--- a/sdk/test/Services/Ep2parsearn/Generated/AmazonEp2parsearnConfig.cs
+++ b/sdk/test/Services/Ep2parsearn/Generated/AmazonEp2parsearnConfig.cs
@@ -34,7 +34,7 @@ namespace Amazon.Ep2parsearn
     public partial class AmazonEp2parsearnConfig : ClientConfig
     {
         private static readonly string UserAgentString =
-            InternalSDKUtils.BuildUserAgentString("Ep2-parse-arn", "3.3");
+            InternalSDKUtils.BuildUserAgentString("Ep2-parse-arn", "4.0");
 
         private static readonly AmazonEp2parsearnEndpointResolver EndpointResolver =
             new AmazonEp2parsearnEndpointResolver();
diff --git a/sdk/test/Services/Ep2parsearn/Properties/AssemblyInfo.cs b/sdk/test/Services/Ep2parsearn/Properties/AssemblyInfo.cs
index 3c157041bc0a..31b968cec313 100644
--- a/sdk/test/Services/Ep2parsearn/Properties/AssemblyInfo.cs
+++ b/sdk/test/Services/Ep2parsearn/Properties/AssemblyInfo.cs
@@ -41,5 +41,9 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.3")]
\ No newline at end of file
+#if BCL
+[assembly: AssemblyVersion("4.0")]
+#else
+[assembly: AssemblyVersion("4.0")]
+#endif
+[assembly: AssemblyFileVersion("4.0")]
\ No newline at end of file
diff --git a/sdk/test/Services/Ep2parsearn/UnitTests/AWSSDK.UnitTests.Ep2parsearn.NetFramework.csproj b/sdk/test/Services/Ep2parsearn/UnitTests/AWSSDK.UnitTests.Ep2parsearn.NetFramework.csproj
index 991e77f83e55..1a8b671334cb 100644
--- a/sdk/test/Services/Ep2parsearn/UnitTests/AWSSDK.UnitTests.Ep2parsearn.NetFramework.csproj
+++ b/sdk/test/Services/Ep2parsearn/UnitTests/AWSSDK.UnitTests.Ep2parsearn.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);TRACE;BCL;ASYNC_AWAIT;DEBUG</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CS1591,CS0612,CS0618</NoWarn>
   </PropertyGroup>
   <ItemGroup>
diff --git a/sdk/test/Services/Ep2s3hostlabel/AWSSDK.Ep2s3hostlabel.NetFramework.csproj b/sdk/test/Services/Ep2s3hostlabel/AWSSDK.Ep2s3hostlabel.NetFramework.csproj
index d9e2899afe1e..00347b8a5d4c 100644
--- a/sdk/test/Services/Ep2s3hostlabel/AWSSDK.Ep2s3hostlabel.NetFramework.csproj
+++ b/sdk/test/Services/Ep2s3hostlabel/AWSSDK.Ep2s3hostlabel.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);BCL;AWS_ASYNC_API;CODE_ANALYSIS</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(RuleSetFileForBuild)' == 'false' Or '$(RuleSetFileForBuild)' == '' ">
diff --git a/sdk/test/Services/Ep2s3hostlabel/AWSSDK.Ep2s3hostlabel.NetStandard.csproj b/sdk/test/Services/Ep2s3hostlabel/AWSSDK.Ep2s3hostlabel.NetStandard.csproj
index 62f1901ab6b6..decc3bf21cd1 100644
--- a/sdk/test/Services/Ep2s3hostlabel/AWSSDK.Ep2s3hostlabel.NetStandard.csproj
+++ b/sdk/test/Services/Ep2s3hostlabel/AWSSDK.Ep2s3hostlabel.NetStandard.csproj
@@ -22,6 +22,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <!-- Async Enumerable Compatibility -->
diff --git a/sdk/test/Services/Ep2s3hostlabel/Generated/AmazonEp2s3hostlabelConfig.cs b/sdk/test/Services/Ep2s3hostlabel/Generated/AmazonEp2s3hostlabelConfig.cs
index d94e27c07e76..3a45e6def8b9 100644
--- a/sdk/test/Services/Ep2s3hostlabel/Generated/AmazonEp2s3hostlabelConfig.cs
+++ b/sdk/test/Services/Ep2s3hostlabel/Generated/AmazonEp2s3hostlabelConfig.cs
@@ -34,7 +34,7 @@ namespace Amazon.Ep2s3hostlabel
     public partial class AmazonEp2s3hostlabelConfig : ClientConfig
     {
         private static readonly string UserAgentString =
-            InternalSDKUtils.BuildUserAgentString("Ep2-s3-host-label", "3.3");
+            InternalSDKUtils.BuildUserAgentString("Ep2-s3-host-label", "4.0");
 
         private static readonly AmazonEp2s3hostlabelEndpointResolver EndpointResolver =
             new AmazonEp2s3hostlabelEndpointResolver();
diff --git a/sdk/test/Services/Ep2s3hostlabel/Properties/AssemblyInfo.cs b/sdk/test/Services/Ep2s3hostlabel/Properties/AssemblyInfo.cs
index 1671e7112cf0..18ee6028bcbf 100644
--- a/sdk/test/Services/Ep2s3hostlabel/Properties/AssemblyInfo.cs
+++ b/sdk/test/Services/Ep2s3hostlabel/Properties/AssemblyInfo.cs
@@ -41,5 +41,9 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.3")]
\ No newline at end of file
+#if BCL
+[assembly: AssemblyVersion("4.0")]
+#else
+[assembly: AssemblyVersion("4.0")]
+#endif
+[assembly: AssemblyFileVersion("4.0")]
\ No newline at end of file
diff --git a/sdk/test/Services/Ep2s3hostlabel/UnitTests/AWSSDK.UnitTests.Ep2s3hostlabel.NetFramework.csproj b/sdk/test/Services/Ep2s3hostlabel/UnitTests/AWSSDK.UnitTests.Ep2s3hostlabel.NetFramework.csproj
index 0694835819bf..8e136a088638 100644
--- a/sdk/test/Services/Ep2s3hostlabel/UnitTests/AWSSDK.UnitTests.Ep2s3hostlabel.NetFramework.csproj
+++ b/sdk/test/Services/Ep2s3hostlabel/UnitTests/AWSSDK.UnitTests.Ep2s3hostlabel.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);TRACE;BCL;ASYNC_AWAIT;DEBUG</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CS1591,CS0612,CS0618</NoWarn>
   </PropertyGroup>
   <ItemGroup>
diff --git a/sdk/test/Services/Ep2substring/AWSSDK.Ep2substring.NetFramework.csproj b/sdk/test/Services/Ep2substring/AWSSDK.Ep2substring.NetFramework.csproj
index b402edd55c06..43333cf1b7c7 100644
--- a/sdk/test/Services/Ep2substring/AWSSDK.Ep2substring.NetFramework.csproj
+++ b/sdk/test/Services/Ep2substring/AWSSDK.Ep2substring.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);BCL;AWS_ASYNC_API;CODE_ANALYSIS</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(RuleSetFileForBuild)' == 'false' Or '$(RuleSetFileForBuild)' == '' ">
diff --git a/sdk/test/Services/Ep2substring/AWSSDK.Ep2substring.NetStandard.csproj b/sdk/test/Services/Ep2substring/AWSSDK.Ep2substring.NetStandard.csproj
index 8dcbe641b459..c4b0e4da01a7 100644
--- a/sdk/test/Services/Ep2substring/AWSSDK.Ep2substring.NetStandard.csproj
+++ b/sdk/test/Services/Ep2substring/AWSSDK.Ep2substring.NetStandard.csproj
@@ -22,6 +22,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <!-- Async Enumerable Compatibility -->
diff --git a/sdk/test/Services/Ep2substring/Generated/AmazonEp2substringConfig.cs b/sdk/test/Services/Ep2substring/Generated/AmazonEp2substringConfig.cs
index 0d3626b4ccfb..381a3a42bc4d 100644
--- a/sdk/test/Services/Ep2substring/Generated/AmazonEp2substringConfig.cs
+++ b/sdk/test/Services/Ep2substring/Generated/AmazonEp2substringConfig.cs
@@ -34,7 +34,7 @@ namespace Amazon.Ep2substring
     public partial class AmazonEp2substringConfig : ClientConfig
     {
         private static readonly string UserAgentString =
-            InternalSDKUtils.BuildUserAgentString("Ep2-substring", "3.3");
+            InternalSDKUtils.BuildUserAgentString("Ep2-substring", "4.0");
 
         private static readonly AmazonEp2substringEndpointResolver EndpointResolver =
             new AmazonEp2substringEndpointResolver();
diff --git a/sdk/test/Services/Ep2substring/Properties/AssemblyInfo.cs b/sdk/test/Services/Ep2substring/Properties/AssemblyInfo.cs
index a756e03d1d95..2c341d5a791a 100644
--- a/sdk/test/Services/Ep2substring/Properties/AssemblyInfo.cs
+++ b/sdk/test/Services/Ep2substring/Properties/AssemblyInfo.cs
@@ -41,5 +41,9 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.3")]
\ No newline at end of file
+#if BCL
+[assembly: AssemblyVersion("4.0")]
+#else
+[assembly: AssemblyVersion("4.0")]
+#endif
+[assembly: AssemblyFileVersion("4.0")]
\ No newline at end of file
diff --git a/sdk/test/Services/Ep2substring/UnitTests/AWSSDK.UnitTests.Ep2substring.NetFramework.csproj b/sdk/test/Services/Ep2substring/UnitTests/AWSSDK.UnitTests.Ep2substring.NetFramework.csproj
index 3abf08b1bc67..1a4e8b42b2e0 100644
--- a/sdk/test/Services/Ep2substring/UnitTests/AWSSDK.UnitTests.Ep2substring.NetFramework.csproj
+++ b/sdk/test/Services/Ep2substring/UnitTests/AWSSDK.UnitTests.Ep2substring.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);TRACE;BCL;ASYNC_AWAIT;DEBUG</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CS1591,CS0612,CS0618</NoWarn>
   </PropertyGroup>
   <ItemGroup>
diff --git a/sdk/test/Services/EventBridge/UnitTests/AWSSDK.UnitTests.EventBridge.NetFramework.csproj b/sdk/test/Services/EventBridge/UnitTests/AWSSDK.UnitTests.EventBridge.NetFramework.csproj
index ebea15080399..cc0860a75f3b 100644
--- a/sdk/test/Services/EventBridge/UnitTests/AWSSDK.UnitTests.EventBridge.NetFramework.csproj
+++ b/sdk/test/Services/EventBridge/UnitTests/AWSSDK.UnitTests.EventBridge.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);TRACE;BCL;ASYNC_AWAIT;DEBUG</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CS1591,CS0612,CS0618</NoWarn>
   </PropertyGroup>
   <ItemGroup>
diff --git a/sdk/test/Services/FIS/UnitTests/AWSSDK.UnitTests.FIS.NetFramework.csproj b/sdk/test/Services/FIS/UnitTests/AWSSDK.UnitTests.FIS.NetFramework.csproj
index 190840fdf8e4..ac337b40b4aa 100644
--- a/sdk/test/Services/FIS/UnitTests/AWSSDK.UnitTests.FIS.NetFramework.csproj
+++ b/sdk/test/Services/FIS/UnitTests/AWSSDK.UnitTests.FIS.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);TRACE;BCL;ASYNC_AWAIT;DEBUG</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CS1591,CS0612,CS0618</NoWarn>
   </PropertyGroup>
   <ItemGroup>
diff --git a/sdk/test/Services/FMS/UnitTests/AWSSDK.UnitTests.FMS.NetFramework.csproj b/sdk/test/Services/FMS/UnitTests/AWSSDK.UnitTests.FMS.NetFramework.csproj
index d25f9cfeb356..7350cc03f72d 100644
--- a/sdk/test/Services/FMS/UnitTests/AWSSDK.UnitTests.FMS.NetFramework.csproj
+++ b/sdk/test/Services/FMS/UnitTests/AWSSDK.UnitTests.FMS.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);TRACE;BCL;ASYNC_AWAIT;DEBUG</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CS1591,CS0612,CS0618</NoWarn>
   </PropertyGroup>
   <ItemGroup>
diff --git a/sdk/test/Services/FSx/UnitTests/AWSSDK.UnitTests.FSx.NetFramework.csproj b/sdk/test/Services/FSx/UnitTests/AWSSDK.UnitTests.FSx.NetFramework.csproj
index 0de9c2780e57..d6a4794d3234 100644
--- a/sdk/test/Services/FSx/UnitTests/AWSSDK.UnitTests.FSx.NetFramework.csproj
+++ b/sdk/test/Services/FSx/UnitTests/AWSSDK.UnitTests.FSx.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);TRACE;BCL;ASYNC_AWAIT;DEBUG</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CS1591,CS0612,CS0618</NoWarn>
   </PropertyGroup>
   <ItemGroup>
diff --git a/sdk/test/Services/FinSpaceData/UnitTests/AWSSDK.UnitTests.FinSpaceData.NetFramework.csproj b/sdk/test/Services/FinSpaceData/UnitTests/AWSSDK.UnitTests.FinSpaceData.NetFramework.csproj
index e32febe8884b..8d8126fe1a50 100644
--- a/sdk/test/Services/FinSpaceData/UnitTests/AWSSDK.UnitTests.FinSpaceData.NetFramework.csproj
+++ b/sdk/test/Services/FinSpaceData/UnitTests/AWSSDK.UnitTests.FinSpaceData.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);TRACE;BCL;ASYNC_AWAIT;DEBUG</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CS1591,CS0612,CS0618</NoWarn>
   </PropertyGroup>
   <ItemGroup>
diff --git a/sdk/test/Services/Finspace/UnitTests/AWSSDK.UnitTests.Finspace.NetFramework.csproj b/sdk/test/Services/Finspace/UnitTests/AWSSDK.UnitTests.Finspace.NetFramework.csproj
index 00e647312d8b..ad2190796b50 100644
--- a/sdk/test/Services/Finspace/UnitTests/AWSSDK.UnitTests.Finspace.NetFramework.csproj
+++ b/sdk/test/Services/Finspace/UnitTests/AWSSDK.UnitTests.Finspace.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);TRACE;BCL;ASYNC_AWAIT;DEBUG</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CS1591,CS0612,CS0618</NoWarn>
   </PropertyGroup>
   <ItemGroup>
diff --git a/sdk/test/Services/ForecastQueryService/UnitTests/AWSSDK.UnitTests.ForecastQueryService.NetFramework.csproj b/sdk/test/Services/ForecastQueryService/UnitTests/AWSSDK.UnitTests.ForecastQueryService.NetFramework.csproj
index 7a596f16b1cc..67e9cceb4171 100644
--- a/sdk/test/Services/ForecastQueryService/UnitTests/AWSSDK.UnitTests.ForecastQueryService.NetFramework.csproj
+++ b/sdk/test/Services/ForecastQueryService/UnitTests/AWSSDK.UnitTests.ForecastQueryService.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);TRACE;BCL;ASYNC_AWAIT;DEBUG</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CS1591,CS0612,CS0618</NoWarn>
   </PropertyGroup>
   <ItemGroup>
diff --git a/sdk/test/Services/ForecastService/UnitTests/AWSSDK.UnitTests.ForecastService.NetFramework.csproj b/sdk/test/Services/ForecastService/UnitTests/AWSSDK.UnitTests.ForecastService.NetFramework.csproj
index dcd9b676c1d2..761f1e9c0d7a 100644
--- a/sdk/test/Services/ForecastService/UnitTests/AWSSDK.UnitTests.ForecastService.NetFramework.csproj
+++ b/sdk/test/Services/ForecastService/UnitTests/AWSSDK.UnitTests.ForecastService.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);TRACE;BCL;ASYNC_AWAIT;DEBUG</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CS1591,CS0612,CS0618</NoWarn>
   </PropertyGroup>
   <ItemGroup>
diff --git a/sdk/test/Services/FraudDetector/UnitTests/AWSSDK.UnitTests.FraudDetector.NetFramework.csproj b/sdk/test/Services/FraudDetector/UnitTests/AWSSDK.UnitTests.FraudDetector.NetFramework.csproj
index 273bc6df21ed..598475c6ad39 100644
--- a/sdk/test/Services/FraudDetector/UnitTests/AWSSDK.UnitTests.FraudDetector.NetFramework.csproj
+++ b/sdk/test/Services/FraudDetector/UnitTests/AWSSDK.UnitTests.FraudDetector.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);TRACE;BCL;ASYNC_AWAIT;DEBUG</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CS1591,CS0612,CS0618</NoWarn>
   </PropertyGroup>
   <ItemGroup>
diff --git a/sdk/test/Services/FreeTier/UnitTests/AWSSDK.UnitTests.FreeTier.NetFramework.csproj b/sdk/test/Services/FreeTier/UnitTests/AWSSDK.UnitTests.FreeTier.NetFramework.csproj
index d780636d774b..91a6992e2789 100644
--- a/sdk/test/Services/FreeTier/UnitTests/AWSSDK.UnitTests.FreeTier.NetFramework.csproj
+++ b/sdk/test/Services/FreeTier/UnitTests/AWSSDK.UnitTests.FreeTier.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);TRACE;BCL;ASYNC_AWAIT;DEBUG</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CS1591,CS0612,CS0618</NoWarn>
   </PropertyGroup>
   <ItemGroup>
diff --git a/sdk/test/Services/GameLift/IntegrationTests/AWSSDK.IntegrationTests.GameLift.NetFramework.csproj b/sdk/test/Services/GameLift/IntegrationTests/AWSSDK.IntegrationTests.GameLift.NetFramework.csproj
index 35a569772bfc..ee58085253d3 100644
--- a/sdk/test/Services/GameLift/IntegrationTests/AWSSDK.IntegrationTests.GameLift.NetFramework.csproj
+++ b/sdk/test/Services/GameLift/IntegrationTests/AWSSDK.IntegrationTests.GameLift.NetFramework.csproj
@@ -1,6 +1,6 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);DEBUG;TRACE;BCL;ASYNC_AWAIT;LOCAL_FILE</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>false</GenerateDocumentationFile>
diff --git a/sdk/test/Services/GameLift/UnitTests/AWSSDK.UnitTests.GameLift.NetFramework.csproj b/sdk/test/Services/GameLift/UnitTests/AWSSDK.UnitTests.GameLift.NetFramework.csproj
index 73fcdb5f4423..a2989290cafe 100644
--- a/sdk/test/Services/GameLift/UnitTests/AWSSDK.UnitTests.GameLift.NetFramework.csproj
+++ b/sdk/test/Services/GameLift/UnitTests/AWSSDK.UnitTests.GameLift.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);TRACE;BCL;ASYNC_AWAIT;DEBUG</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CS1591,CS0612,CS0618</NoWarn>
   </PropertyGroup>
   <ItemGroup>
diff --git a/sdk/test/Services/Glacier/IntegrationTests/AWSSDK.IntegrationTests.Glacier.NetFramework.csproj b/sdk/test/Services/Glacier/IntegrationTests/AWSSDK.IntegrationTests.Glacier.NetFramework.csproj
index a99345c14cfe..b00ffc6cbefd 100644
--- a/sdk/test/Services/Glacier/IntegrationTests/AWSSDK.IntegrationTests.Glacier.NetFramework.csproj
+++ b/sdk/test/Services/Glacier/IntegrationTests/AWSSDK.IntegrationTests.Glacier.NetFramework.csproj
@@ -1,6 +1,6 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);DEBUG;TRACE;BCL;ASYNC_AWAIT;LOCAL_FILE</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>false</GenerateDocumentationFile>
diff --git a/sdk/test/Services/Glacier/UnitTests/AWSSDK.UnitTests.Glacier.NetFramework.csproj b/sdk/test/Services/Glacier/UnitTests/AWSSDK.UnitTests.Glacier.NetFramework.csproj
index 8ca3fdb04cef..ff351fb7c826 100644
--- a/sdk/test/Services/Glacier/UnitTests/AWSSDK.UnitTests.Glacier.NetFramework.csproj
+++ b/sdk/test/Services/Glacier/UnitTests/AWSSDK.UnitTests.Glacier.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);TRACE;BCL;ASYNC_AWAIT;DEBUG</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CS1591,CS0612,CS0618</NoWarn>
   </PropertyGroup>
   <ItemGroup>
diff --git a/sdk/test/Services/GlobalAccelerator/UnitTests/AWSSDK.UnitTests.GlobalAccelerator.NetFramework.csproj b/sdk/test/Services/GlobalAccelerator/UnitTests/AWSSDK.UnitTests.GlobalAccelerator.NetFramework.csproj
index 893c408aeff2..1e1cab150ba2 100644
--- a/sdk/test/Services/GlobalAccelerator/UnitTests/AWSSDK.UnitTests.GlobalAccelerator.NetFramework.csproj
+++ b/sdk/test/Services/GlobalAccelerator/UnitTests/AWSSDK.UnitTests.GlobalAccelerator.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);TRACE;BCL;ASYNC_AWAIT;DEBUG</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CS1591,CS0612,CS0618</NoWarn>
   </PropertyGroup>
   <ItemGroup>
diff --git a/sdk/test/Services/Glue/UnitTests/AWSSDK.UnitTests.Glue.NetFramework.csproj b/sdk/test/Services/Glue/UnitTests/AWSSDK.UnitTests.Glue.NetFramework.csproj
index 25867c43fb37..7d9a6a0f58fa 100644
--- a/sdk/test/Services/Glue/UnitTests/AWSSDK.UnitTests.Glue.NetFramework.csproj
+++ b/sdk/test/Services/Glue/UnitTests/AWSSDK.UnitTests.Glue.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);TRACE;BCL;ASYNC_AWAIT;DEBUG</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CS1591,CS0612,CS0618</NoWarn>
   </PropertyGroup>
   <ItemGroup>
diff --git a/sdk/test/Services/GlueDataBrew/UnitTests/AWSSDK.UnitTests.GlueDataBrew.NetFramework.csproj b/sdk/test/Services/GlueDataBrew/UnitTests/AWSSDK.UnitTests.GlueDataBrew.NetFramework.csproj
index b2ca24779a55..38faffc47850 100644
--- a/sdk/test/Services/GlueDataBrew/UnitTests/AWSSDK.UnitTests.GlueDataBrew.NetFramework.csproj
+++ b/sdk/test/Services/GlueDataBrew/UnitTests/AWSSDK.UnitTests.GlueDataBrew.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);TRACE;BCL;ASYNC_AWAIT;DEBUG</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CS1591,CS0612,CS0618</NoWarn>
   </PropertyGroup>
   <ItemGroup>
diff --git a/sdk/test/Services/Greengrass/UnitTests/AWSSDK.UnitTests.Greengrass.NetFramework.csproj b/sdk/test/Services/Greengrass/UnitTests/AWSSDK.UnitTests.Greengrass.NetFramework.csproj
index 3e692efc3fae..ccea40e18cc4 100644
--- a/sdk/test/Services/Greengrass/UnitTests/AWSSDK.UnitTests.Greengrass.NetFramework.csproj
+++ b/sdk/test/Services/Greengrass/UnitTests/AWSSDK.UnitTests.Greengrass.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);TRACE;BCL;ASYNC_AWAIT;DEBUG</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CS1591,CS0612,CS0618</NoWarn>
   </PropertyGroup>
   <ItemGroup>
diff --git a/sdk/test/Services/GreengrassV2/UnitTests/AWSSDK.UnitTests.GreengrassV2.NetFramework.csproj b/sdk/test/Services/GreengrassV2/UnitTests/AWSSDK.UnitTests.GreengrassV2.NetFramework.csproj
index a6ded99aadd9..b54d9bbd8664 100644
--- a/sdk/test/Services/GreengrassV2/UnitTests/AWSSDK.UnitTests.GreengrassV2.NetFramework.csproj
+++ b/sdk/test/Services/GreengrassV2/UnitTests/AWSSDK.UnitTests.GreengrassV2.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);TRACE;BCL;ASYNC_AWAIT;DEBUG</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CS1591,CS0612,CS0618</NoWarn>
   </PropertyGroup>
   <ItemGroup>
diff --git a/sdk/test/Services/GroundStation/UnitTests/AWSSDK.UnitTests.GroundStation.NetFramework.csproj b/sdk/test/Services/GroundStation/UnitTests/AWSSDK.UnitTests.GroundStation.NetFramework.csproj
index 1cb8375a201b..0c6009407f42 100644
--- a/sdk/test/Services/GroundStation/UnitTests/AWSSDK.UnitTests.GroundStation.NetFramework.csproj
+++ b/sdk/test/Services/GroundStation/UnitTests/AWSSDK.UnitTests.GroundStation.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);TRACE;BCL;ASYNC_AWAIT;DEBUG</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CS1591,CS0612,CS0618</NoWarn>
   </PropertyGroup>
   <ItemGroup>
diff --git a/sdk/test/Services/GuardDuty/UnitTests/AWSSDK.UnitTests.GuardDuty.NetFramework.csproj b/sdk/test/Services/GuardDuty/UnitTests/AWSSDK.UnitTests.GuardDuty.NetFramework.csproj
index a5626d18e700..cc296ac9ddb1 100644
--- a/sdk/test/Services/GuardDuty/UnitTests/AWSSDK.UnitTests.GuardDuty.NetFramework.csproj
+++ b/sdk/test/Services/GuardDuty/UnitTests/AWSSDK.UnitTests.GuardDuty.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);TRACE;BCL;ASYNC_AWAIT;DEBUG</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CS1591,CS0612,CS0618</NoWarn>
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   <ItemGroup>
diff --git a/sdk/test/Services/HealthLake/UnitTests/AWSSDK.UnitTests.HealthLake.NetFramework.csproj b/sdk/test/Services/HealthLake/UnitTests/AWSSDK.UnitTests.HealthLake.NetFramework.csproj
index 98a60e4502f8..780274b0a3f1 100644
--- a/sdk/test/Services/HealthLake/UnitTests/AWSSDK.UnitTests.HealthLake.NetFramework.csproj
+++ b/sdk/test/Services/HealthLake/UnitTests/AWSSDK.UnitTests.HealthLake.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);TRACE;BCL;ASYNC_AWAIT;DEBUG</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CS1591,CS0612,CS0618</NoWarn>
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   <ItemGroup>
diff --git a/sdk/test/Services/Honeycode/UnitTests/AWSSDK.UnitTests.Honeycode.NetFramework.csproj b/sdk/test/Services/Honeycode/UnitTests/AWSSDK.UnitTests.Honeycode.NetFramework.csproj
index 66642786525b..7842b7ae3f4f 100644
--- a/sdk/test/Services/Honeycode/UnitTests/AWSSDK.UnitTests.Honeycode.NetFramework.csproj
+++ b/sdk/test/Services/Honeycode/UnitTests/AWSSDK.UnitTests.Honeycode.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);TRACE;BCL;ASYNC_AWAIT;DEBUG</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CS1591,CS0612,CS0618</NoWarn>
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   <ItemGroup>
diff --git a/sdk/test/Services/IAMRolesAnywhere/UnitTests/AWSSDK.UnitTests.IAMRolesAnywhere.NetFramework.csproj b/sdk/test/Services/IAMRolesAnywhere/UnitTests/AWSSDK.UnitTests.IAMRolesAnywhere.NetFramework.csproj
index 94c6c46f69bf..8956d261e6c7 100644
--- a/sdk/test/Services/IAMRolesAnywhere/UnitTests/AWSSDK.UnitTests.IAMRolesAnywhere.NetFramework.csproj
+++ b/sdk/test/Services/IAMRolesAnywhere/UnitTests/AWSSDK.UnitTests.IAMRolesAnywhere.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);TRACE;BCL;ASYNC_AWAIT;DEBUG</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CS1591,CS0612,CS0618</NoWarn>
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   <ItemGroup>
diff --git a/sdk/test/Services/IVS/UnitTests/AWSSDK.UnitTests.IVS.NetFramework.csproj b/sdk/test/Services/IVS/UnitTests/AWSSDK.UnitTests.IVS.NetFramework.csproj
index ffddcb8bdc89..82cbad001bab 100644
--- a/sdk/test/Services/IVS/UnitTests/AWSSDK.UnitTests.IVS.NetFramework.csproj
+++ b/sdk/test/Services/IVS/UnitTests/AWSSDK.UnitTests.IVS.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
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     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CS1591,CS0612,CS0618</NoWarn>
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   <ItemGroup>
diff --git a/sdk/test/Services/IVSRealTime/UnitTests/AWSSDK.UnitTests.IVSRealTime.NetFramework.csproj b/sdk/test/Services/IVSRealTime/UnitTests/AWSSDK.UnitTests.IVSRealTime.NetFramework.csproj
index b422e076de6c..8742eaa4cd77 100644
--- a/sdk/test/Services/IVSRealTime/UnitTests/AWSSDK.UnitTests.IVSRealTime.NetFramework.csproj
+++ b/sdk/test/Services/IVSRealTime/UnitTests/AWSSDK.UnitTests.IVSRealTime.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
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     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
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+    <LangVersion>9.0</LangVersion>
     <NoWarn>CS1591,CS0612,CS0618</NoWarn>
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   <ItemGroup>
diff --git a/sdk/test/Services/IdentityManagement/IntegrationTests/AWSSDK.IntegrationTests.IdentityManagement.NetFramework.csproj b/sdk/test/Services/IdentityManagement/IntegrationTests/AWSSDK.IntegrationTests.IdentityManagement.NetFramework.csproj
index d80beaf18434..3e2c8ec99466 100644
--- a/sdk/test/Services/IdentityManagement/IntegrationTests/AWSSDK.IntegrationTests.IdentityManagement.NetFramework.csproj
+++ b/sdk/test/Services/IdentityManagement/IntegrationTests/AWSSDK.IntegrationTests.IdentityManagement.NetFramework.csproj
@@ -1,6 +1,6 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
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     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>false</GenerateDocumentationFile>
diff --git a/sdk/test/Services/IdentityManagement/UnitTests/AWSSDK.UnitTests.IdentityManagement.NetFramework.csproj b/sdk/test/Services/IdentityManagement/UnitTests/AWSSDK.UnitTests.IdentityManagement.NetFramework.csproj
index a7aa50b4925b..7ac6de2186d4 100644
--- a/sdk/test/Services/IdentityManagement/UnitTests/AWSSDK.UnitTests.IdentityManagement.NetFramework.csproj
+++ b/sdk/test/Services/IdentityManagement/UnitTests/AWSSDK.UnitTests.IdentityManagement.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);TRACE;BCL;ASYNC_AWAIT;DEBUG</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CS1591,CS0612,CS0618</NoWarn>
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   <ItemGroup>
diff --git a/sdk/test/Services/IdentityStore/UnitTests/AWSSDK.UnitTests.IdentityStore.NetFramework.csproj b/sdk/test/Services/IdentityStore/UnitTests/AWSSDK.UnitTests.IdentityStore.NetFramework.csproj
index 7e71894bb585..dc75ad1b34d3 100644
--- a/sdk/test/Services/IdentityStore/UnitTests/AWSSDK.UnitTests.IdentityStore.NetFramework.csproj
+++ b/sdk/test/Services/IdentityStore/UnitTests/AWSSDK.UnitTests.IdentityStore.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
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     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
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+    <LangVersion>9.0</LangVersion>
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   <ItemGroup>
diff --git a/sdk/test/Services/Imagebuilder/UnitTests/AWSSDK.UnitTests.Imagebuilder.NetFramework.csproj b/sdk/test/Services/Imagebuilder/UnitTests/AWSSDK.UnitTests.Imagebuilder.NetFramework.csproj
index 5f037c323a93..927778be7c63 100644
--- a/sdk/test/Services/Imagebuilder/UnitTests/AWSSDK.UnitTests.Imagebuilder.NetFramework.csproj
+++ b/sdk/test/Services/Imagebuilder/UnitTests/AWSSDK.UnitTests.Imagebuilder.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
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     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
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+    <LangVersion>9.0</LangVersion>
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   <ItemGroup>
diff --git a/sdk/test/Services/ImportExport/IntegrationTests/AWSSDK.IntegrationTests.ImportExport.NetFramework.csproj b/sdk/test/Services/ImportExport/IntegrationTests/AWSSDK.IntegrationTests.ImportExport.NetFramework.csproj
index 182fc734c9db..ee34e60881c3 100644
--- a/sdk/test/Services/ImportExport/IntegrationTests/AWSSDK.IntegrationTests.ImportExport.NetFramework.csproj
+++ b/sdk/test/Services/ImportExport/IntegrationTests/AWSSDK.IntegrationTests.ImportExport.NetFramework.csproj
@@ -1,6 +1,6 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
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     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>false</GenerateDocumentationFile>
diff --git a/sdk/test/Services/ImportExport/UnitTests/AWSSDK.UnitTests.ImportExport.NetFramework.csproj b/sdk/test/Services/ImportExport/UnitTests/AWSSDK.UnitTests.ImportExport.NetFramework.csproj
index dcced90983b3..0c50ca38617c 100644
--- a/sdk/test/Services/ImportExport/UnitTests/AWSSDK.UnitTests.ImportExport.NetFramework.csproj
+++ b/sdk/test/Services/ImportExport/UnitTests/AWSSDK.UnitTests.ImportExport.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
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     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
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+    <LangVersion>9.0</LangVersion>
     <NoWarn>CS1591,CS0612,CS0618</NoWarn>
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   <ItemGroup>
diff --git a/sdk/test/Services/Inspector/IntegrationTests/AWSSDK.IntegrationTests.Inspector.NetFramework.csproj b/sdk/test/Services/Inspector/IntegrationTests/AWSSDK.IntegrationTests.Inspector.NetFramework.csproj
index 3bc64061061d..9e76337d0e57 100644
--- a/sdk/test/Services/Inspector/IntegrationTests/AWSSDK.IntegrationTests.Inspector.NetFramework.csproj
+++ b/sdk/test/Services/Inspector/IntegrationTests/AWSSDK.IntegrationTests.Inspector.NetFramework.csproj
@@ -1,6 +1,6 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
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     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>false</GenerateDocumentationFile>
diff --git a/sdk/test/Services/Inspector/UnitTests/AWSSDK.UnitTests.Inspector.NetFramework.csproj b/sdk/test/Services/Inspector/UnitTests/AWSSDK.UnitTests.Inspector.NetFramework.csproj
index 46f47f49d35f..e1dad8cbc620 100644
--- a/sdk/test/Services/Inspector/UnitTests/AWSSDK.UnitTests.Inspector.NetFramework.csproj
+++ b/sdk/test/Services/Inspector/UnitTests/AWSSDK.UnitTests.Inspector.NetFramework.csproj
@@ -1,7 +1,7 @@
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    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
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     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CS1591,CS0612,CS0618</NoWarn>
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   <ItemGroup>
diff --git a/sdk/test/Services/Inspector2/UnitTests/AWSSDK.UnitTests.Inspector2.NetFramework.csproj b/sdk/test/Services/Inspector2/UnitTests/AWSSDK.UnitTests.Inspector2.NetFramework.csproj
index fa7b9d1d1ff3..1c03bb3a6274 100644
--- a/sdk/test/Services/Inspector2/UnitTests/AWSSDK.UnitTests.Inspector2.NetFramework.csproj
+++ b/sdk/test/Services/Inspector2/UnitTests/AWSSDK.UnitTests.Inspector2.NetFramework.csproj
@@ -1,7 +1,7 @@
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-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
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@@ -19,6 +19,7 @@
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+    <LangVersion>9.0</LangVersion>
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diff --git a/sdk/test/Services/InspectorScan/UnitTests/AWSSDK.UnitTests.InspectorScan.NetFramework.csproj b/sdk/test/Services/InspectorScan/UnitTests/AWSSDK.UnitTests.InspectorScan.NetFramework.csproj
index ecdd14540100..6c335c63a698 100644
--- a/sdk/test/Services/InspectorScan/UnitTests/AWSSDK.UnitTests.InspectorScan.NetFramework.csproj
+++ b/sdk/test/Services/InspectorScan/UnitTests/AWSSDK.UnitTests.InspectorScan.NetFramework.csproj
@@ -1,7 +1,7 @@
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-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
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@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
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+    <LangVersion>9.0</LangVersion>
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diff --git a/sdk/test/Services/InternetMonitor/UnitTests/AWSSDK.UnitTests.InternetMonitor.NetFramework.csproj b/sdk/test/Services/InternetMonitor/UnitTests/AWSSDK.UnitTests.InternetMonitor.NetFramework.csproj
index 158421b70718..ae592bdc604a 100644
--- a/sdk/test/Services/InternetMonitor/UnitTests/AWSSDK.UnitTests.InternetMonitor.NetFramework.csproj
+++ b/sdk/test/Services/InternetMonitor/UnitTests/AWSSDK.UnitTests.InternetMonitor.NetFramework.csproj
@@ -1,7 +1,7 @@
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    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
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     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
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+    <LangVersion>9.0</LangVersion>
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diff --git a/sdk/test/Services/IoT/IntegrationTests/AWSSDK.IntegrationTests.IoT.NetFramework.csproj b/sdk/test/Services/IoT/IntegrationTests/AWSSDK.IntegrationTests.IoT.NetFramework.csproj
index 77f663a76144..ef211b47982a 100644
--- a/sdk/test/Services/IoT/IntegrationTests/AWSSDK.IntegrationTests.IoT.NetFramework.csproj
+++ b/sdk/test/Services/IoT/IntegrationTests/AWSSDK.IntegrationTests.IoT.NetFramework.csproj
@@ -1,6 +1,6 @@
 <Project Sdk="Microsoft.NET.Sdk">
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+    <TargetFramework>net472</TargetFramework>
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diff --git a/sdk/test/Services/IoT/UnitTests/AWSSDK.UnitTests.IoT.NetFramework.csproj b/sdk/test/Services/IoT/UnitTests/AWSSDK.UnitTests.IoT.NetFramework.csproj
index 378af3baa7a1..5d7af1c729ee 100644
--- a/sdk/test/Services/IoT/UnitTests/AWSSDK.UnitTests.IoT.NetFramework.csproj
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@@ -1,7 +1,7 @@
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@@ -19,6 +19,7 @@
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+    <LangVersion>9.0</LangVersion>
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diff --git a/sdk/test/Services/IoT1ClickDevicesService/UnitTests/AWSSDK.UnitTests.IoT1ClickDevicesService.NetFramework.csproj b/sdk/test/Services/IoT1ClickDevicesService/UnitTests/AWSSDK.UnitTests.IoT1ClickDevicesService.NetFramework.csproj
index ec3050eeebb9..88a51c548761 100644
--- a/sdk/test/Services/IoT1ClickDevicesService/UnitTests/AWSSDK.UnitTests.IoT1ClickDevicesService.NetFramework.csproj
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@@ -1,7 +1,7 @@
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-    <TargetFramework>net462</TargetFramework>
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@@ -19,6 +19,7 @@
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+    <LangVersion>9.0</LangVersion>
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diff --git a/sdk/test/Services/IoT1ClickProjects/UnitTests/AWSSDK.UnitTests.IoT1ClickProjects.NetFramework.csproj b/sdk/test/Services/IoT1ClickProjects/UnitTests/AWSSDK.UnitTests.IoT1ClickProjects.NetFramework.csproj
index 67c177daf803..b6da9ed6577f 100644
--- a/sdk/test/Services/IoT1ClickProjects/UnitTests/AWSSDK.UnitTests.IoT1ClickProjects.NetFramework.csproj
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@@ -1,7 +1,7 @@
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     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CS1591,CS0612,CS0618</NoWarn>
   </PropertyGroup>
   <ItemGroup>
diff --git a/sdk/test/Services/IoTAnalytics/UnitTests/AWSSDK.UnitTests.IoTAnalytics.NetFramework.csproj b/sdk/test/Services/IoTAnalytics/UnitTests/AWSSDK.UnitTests.IoTAnalytics.NetFramework.csproj
index 1f890fda43ad..0f70bcf0f634 100644
--- a/sdk/test/Services/IoTAnalytics/UnitTests/AWSSDK.UnitTests.IoTAnalytics.NetFramework.csproj
+++ b/sdk/test/Services/IoTAnalytics/UnitTests/AWSSDK.UnitTests.IoTAnalytics.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);TRACE;BCL;ASYNC_AWAIT;DEBUG</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CS1591,CS0612,CS0618</NoWarn>
   </PropertyGroup>
   <ItemGroup>
diff --git a/sdk/test/Services/IoTDeviceAdvisor/UnitTests/AWSSDK.UnitTests.IoTDeviceAdvisor.NetFramework.csproj b/sdk/test/Services/IoTDeviceAdvisor/UnitTests/AWSSDK.UnitTests.IoTDeviceAdvisor.NetFramework.csproj
index b179cdfad43a..38327416a0d9 100644
--- a/sdk/test/Services/IoTDeviceAdvisor/UnitTests/AWSSDK.UnitTests.IoTDeviceAdvisor.NetFramework.csproj
+++ b/sdk/test/Services/IoTDeviceAdvisor/UnitTests/AWSSDK.UnitTests.IoTDeviceAdvisor.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);TRACE;BCL;ASYNC_AWAIT;DEBUG</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CS1591,CS0612,CS0618</NoWarn>
   </PropertyGroup>
   <ItemGroup>
diff --git a/sdk/test/Services/IoTEvents/UnitTests/AWSSDK.UnitTests.IoTEvents.NetFramework.csproj b/sdk/test/Services/IoTEvents/UnitTests/AWSSDK.UnitTests.IoTEvents.NetFramework.csproj
index f3d70d4a27df..69a0dfb91dd3 100644
--- a/sdk/test/Services/IoTEvents/UnitTests/AWSSDK.UnitTests.IoTEvents.NetFramework.csproj
+++ b/sdk/test/Services/IoTEvents/UnitTests/AWSSDK.UnitTests.IoTEvents.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);TRACE;BCL;ASYNC_AWAIT;DEBUG</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CS1591,CS0612,CS0618</NoWarn>
   </PropertyGroup>
   <ItemGroup>
diff --git a/sdk/test/Services/IoTEventsData/UnitTests/AWSSDK.UnitTests.IoTEventsData.NetFramework.csproj b/sdk/test/Services/IoTEventsData/UnitTests/AWSSDK.UnitTests.IoTEventsData.NetFramework.csproj
index fc118cfbe6de..98b10338ab49 100644
--- a/sdk/test/Services/IoTEventsData/UnitTests/AWSSDK.UnitTests.IoTEventsData.NetFramework.csproj
+++ b/sdk/test/Services/IoTEventsData/UnitTests/AWSSDK.UnitTests.IoTEventsData.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);TRACE;BCL;ASYNC_AWAIT;DEBUG</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CS1591,CS0612,CS0618</NoWarn>
   </PropertyGroup>
   <ItemGroup>
diff --git a/sdk/test/Services/IoTFleetHub/UnitTests/AWSSDK.UnitTests.IoTFleetHub.NetFramework.csproj b/sdk/test/Services/IoTFleetHub/UnitTests/AWSSDK.UnitTests.IoTFleetHub.NetFramework.csproj
index 44f160c04196..55230c114ec5 100644
--- a/sdk/test/Services/IoTFleetHub/UnitTests/AWSSDK.UnitTests.IoTFleetHub.NetFramework.csproj
+++ b/sdk/test/Services/IoTFleetHub/UnitTests/AWSSDK.UnitTests.IoTFleetHub.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);TRACE;BCL;ASYNC_AWAIT;DEBUG</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CS1591,CS0612,CS0618</NoWarn>
   </PropertyGroup>
   <ItemGroup>
diff --git a/sdk/test/Services/IoTFleetWise/UnitTests/AWSSDK.UnitTests.IoTFleetWise.NetFramework.csproj b/sdk/test/Services/IoTFleetWise/UnitTests/AWSSDK.UnitTests.IoTFleetWise.NetFramework.csproj
index 14b40864df2f..8dcc970d8bf3 100644
--- a/sdk/test/Services/IoTFleetWise/UnitTests/AWSSDK.UnitTests.IoTFleetWise.NetFramework.csproj
+++ b/sdk/test/Services/IoTFleetWise/UnitTests/AWSSDK.UnitTests.IoTFleetWise.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);TRACE;BCL;ASYNC_AWAIT;DEBUG</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CS1591,CS0612,CS0618</NoWarn>
   </PropertyGroup>
   <ItemGroup>
diff --git a/sdk/test/Services/IoTJobsDataPlane/UnitTests/AWSSDK.UnitTests.IoTJobsDataPlane.NetFramework.csproj b/sdk/test/Services/IoTJobsDataPlane/UnitTests/AWSSDK.UnitTests.IoTJobsDataPlane.NetFramework.csproj
index 0d556d7adee0..f8d55306dd73 100644
--- a/sdk/test/Services/IoTJobsDataPlane/UnitTests/AWSSDK.UnitTests.IoTJobsDataPlane.NetFramework.csproj
+++ b/sdk/test/Services/IoTJobsDataPlane/UnitTests/AWSSDK.UnitTests.IoTJobsDataPlane.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);TRACE;BCL;ASYNC_AWAIT;DEBUG</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CS1591,CS0612,CS0618</NoWarn>
   </PropertyGroup>
   <ItemGroup>
diff --git a/sdk/test/Services/IoTSecureTunneling/UnitTests/AWSSDK.UnitTests.IoTSecureTunneling.NetFramework.csproj b/sdk/test/Services/IoTSecureTunneling/UnitTests/AWSSDK.UnitTests.IoTSecureTunneling.NetFramework.csproj
index bdc2a784710a..9e0fca6e4fd0 100644
--- a/sdk/test/Services/IoTSecureTunneling/UnitTests/AWSSDK.UnitTests.IoTSecureTunneling.NetFramework.csproj
+++ b/sdk/test/Services/IoTSecureTunneling/UnitTests/AWSSDK.UnitTests.IoTSecureTunneling.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);TRACE;BCL;ASYNC_AWAIT;DEBUG</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CS1591,CS0612,CS0618</NoWarn>
   </PropertyGroup>
   <ItemGroup>
diff --git a/sdk/test/Services/IoTSiteWise/UnitTests/AWSSDK.UnitTests.IoTSiteWise.NetFramework.csproj b/sdk/test/Services/IoTSiteWise/UnitTests/AWSSDK.UnitTests.IoTSiteWise.NetFramework.csproj
index a7598e61bf46..168deca63e70 100644
--- a/sdk/test/Services/IoTSiteWise/UnitTests/AWSSDK.UnitTests.IoTSiteWise.NetFramework.csproj
+++ b/sdk/test/Services/IoTSiteWise/UnitTests/AWSSDK.UnitTests.IoTSiteWise.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);TRACE;BCL;ASYNC_AWAIT;DEBUG</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CS1591,CS0612,CS0618</NoWarn>
   </PropertyGroup>
   <ItemGroup>
diff --git a/sdk/test/Services/IoTThingsGraph/UnitTests/AWSSDK.UnitTests.IoTThingsGraph.NetFramework.csproj b/sdk/test/Services/IoTThingsGraph/UnitTests/AWSSDK.UnitTests.IoTThingsGraph.NetFramework.csproj
index ebe83f2530a0..8a8592db95c4 100644
--- a/sdk/test/Services/IoTThingsGraph/UnitTests/AWSSDK.UnitTests.IoTThingsGraph.NetFramework.csproj
+++ b/sdk/test/Services/IoTThingsGraph/UnitTests/AWSSDK.UnitTests.IoTThingsGraph.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);TRACE;BCL;ASYNC_AWAIT;DEBUG</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CS1591,CS0612,CS0618</NoWarn>
   </PropertyGroup>
   <ItemGroup>
diff --git a/sdk/test/Services/IoTTwinMaker/UnitTests/AWSSDK.UnitTests.IoTTwinMaker.NetFramework.csproj b/sdk/test/Services/IoTTwinMaker/UnitTests/AWSSDK.UnitTests.IoTTwinMaker.NetFramework.csproj
index 46b0360e74be..127e104ef7d9 100644
--- a/sdk/test/Services/IoTTwinMaker/UnitTests/AWSSDK.UnitTests.IoTTwinMaker.NetFramework.csproj
+++ b/sdk/test/Services/IoTTwinMaker/UnitTests/AWSSDK.UnitTests.IoTTwinMaker.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);TRACE;BCL;ASYNC_AWAIT;DEBUG</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CS1591,CS0612,CS0618</NoWarn>
   </PropertyGroup>
   <ItemGroup>
diff --git a/sdk/test/Services/IoTWireless/UnitTests/AWSSDK.UnitTests.IoTWireless.NetFramework.csproj b/sdk/test/Services/IoTWireless/UnitTests/AWSSDK.UnitTests.IoTWireless.NetFramework.csproj
index 2a955ede6a3f..24eb5674458c 100644
--- a/sdk/test/Services/IoTWireless/UnitTests/AWSSDK.UnitTests.IoTWireless.NetFramework.csproj
+++ b/sdk/test/Services/IoTWireless/UnitTests/AWSSDK.UnitTests.IoTWireless.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);TRACE;BCL;ASYNC_AWAIT;DEBUG</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CS1591,CS0612,CS0618</NoWarn>
   </PropertyGroup>
   <ItemGroup>
diff --git a/sdk/test/Services/IotData/IntegrationTests/AWSSDK.IntegrationTests.IotData.NetFramework.csproj b/sdk/test/Services/IotData/IntegrationTests/AWSSDK.IntegrationTests.IotData.NetFramework.csproj
index 6cd13748f562..f8dfb6045e00 100644
--- a/sdk/test/Services/IotData/IntegrationTests/AWSSDK.IntegrationTests.IotData.NetFramework.csproj
+++ b/sdk/test/Services/IotData/IntegrationTests/AWSSDK.IntegrationTests.IotData.NetFramework.csproj
@@ -1,6 +1,6 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);DEBUG;TRACE;BCL;ASYNC_AWAIT;LOCAL_FILE</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>false</GenerateDocumentationFile>
diff --git a/sdk/test/Services/IotData/UnitTests/AWSSDK.UnitTests.IotData.NetFramework.csproj b/sdk/test/Services/IotData/UnitTests/AWSSDK.UnitTests.IotData.NetFramework.csproj
index 3db2f42b6ae6..6b671af17809 100644
--- a/sdk/test/Services/IotData/UnitTests/AWSSDK.UnitTests.IotData.NetFramework.csproj
+++ b/sdk/test/Services/IotData/UnitTests/AWSSDK.UnitTests.IotData.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);TRACE;BCL;ASYNC_AWAIT;DEBUG</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CS1591,CS0612,CS0618</NoWarn>
   </PropertyGroup>
   <ItemGroup>
diff --git a/sdk/test/Services/Ivschat/UnitTests/AWSSDK.UnitTests.Ivschat.NetFramework.csproj b/sdk/test/Services/Ivschat/UnitTests/AWSSDK.UnitTests.Ivschat.NetFramework.csproj
index 138107e56bae..bdb25381db2d 100644
--- a/sdk/test/Services/Ivschat/UnitTests/AWSSDK.UnitTests.Ivschat.NetFramework.csproj
+++ b/sdk/test/Services/Ivschat/UnitTests/AWSSDK.UnitTests.Ivschat.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);TRACE;BCL;ASYNC_AWAIT;DEBUG</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CS1591,CS0612,CS0618</NoWarn>
   </PropertyGroup>
   <ItemGroup>
diff --git a/sdk/test/Services/JSONRPC10/AWSSDK.JSONRPC10.NetFramework.csproj b/sdk/test/Services/JSONRPC10/AWSSDK.JSONRPC10.NetFramework.csproj
index ea11d37e6792..097ecaa85ffe 100644
--- a/sdk/test/Services/JSONRPC10/AWSSDK.JSONRPC10.NetFramework.csproj
+++ b/sdk/test/Services/JSONRPC10/AWSSDK.JSONRPC10.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);BCL;AWS_ASYNC_API;CODE_ANALYSIS</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(RuleSetFileForBuild)' == 'false' Or '$(RuleSetFileForBuild)' == '' ">
diff --git a/sdk/test/Services/JSONRPC10/AWSSDK.JSONRPC10.NetStandard.csproj b/sdk/test/Services/JSONRPC10/AWSSDK.JSONRPC10.NetStandard.csproj
index 1830735bee23..51dcd01c6b29 100644
--- a/sdk/test/Services/JSONRPC10/AWSSDK.JSONRPC10.NetStandard.csproj
+++ b/sdk/test/Services/JSONRPC10/AWSSDK.JSONRPC10.NetStandard.csproj
@@ -22,6 +22,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <!-- Async Enumerable Compatibility -->
diff --git a/sdk/test/Services/JSONRPC10/Generated/AmazonJSONRPC10Config.cs b/sdk/test/Services/JSONRPC10/Generated/AmazonJSONRPC10Config.cs
index d160ada804f6..501964cea93c 100644
--- a/sdk/test/Services/JSONRPC10/Generated/AmazonJSONRPC10Config.cs
+++ b/sdk/test/Services/JSONRPC10/Generated/AmazonJSONRPC10Config.cs
@@ -34,7 +34,7 @@ namespace Amazon.JSONRPC10
     public partial class AmazonJSONRPC10Config : ClientConfig
     {
         private static readonly string UserAgentString =
-            InternalSDKUtils.BuildUserAgentString("JSON RPC 10", "3.3");
+            InternalSDKUtils.BuildUserAgentString("JSON RPC 10", "4.0");
 
 
         private string _userAgent = UserAgentString;
diff --git a/sdk/test/Services/JSONRPC10/Properties/AssemblyInfo.cs b/sdk/test/Services/JSONRPC10/Properties/AssemblyInfo.cs
index 59203611d830..e49a29c9748f 100644
--- a/sdk/test/Services/JSONRPC10/Properties/AssemblyInfo.cs
+++ b/sdk/test/Services/JSONRPC10/Properties/AssemblyInfo.cs
@@ -41,5 +41,9 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.3")]
\ No newline at end of file
+#if BCL
+[assembly: AssemblyVersion("4.0")]
+#else
+[assembly: AssemblyVersion("4.0")]
+#endif
+[assembly: AssemblyFileVersion("4.0")]
\ No newline at end of file
diff --git a/sdk/test/Services/JSONRPC10/UnitTests/AWSSDK.UnitTests.JSONRPC10.NetFramework.csproj b/sdk/test/Services/JSONRPC10/UnitTests/AWSSDK.UnitTests.JSONRPC10.NetFramework.csproj
index eec1675a94aa..62a9c5d007d9 100644
--- a/sdk/test/Services/JSONRPC10/UnitTests/AWSSDK.UnitTests.JSONRPC10.NetFramework.csproj
+++ b/sdk/test/Services/JSONRPC10/UnitTests/AWSSDK.UnitTests.JSONRPC10.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);TRACE;BCL;ASYNC_AWAIT;DEBUG</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CS1591,CS0612,CS0618</NoWarn>
   </PropertyGroup>
   <ItemGroup>
diff --git a/sdk/test/Services/JsonProtocol/AWSSDK.JsonProtocol.NetFramework.csproj b/sdk/test/Services/JsonProtocol/AWSSDK.JsonProtocol.NetFramework.csproj
index 64e62c48ec8c..795a344d4fad 100644
--- a/sdk/test/Services/JsonProtocol/AWSSDK.JsonProtocol.NetFramework.csproj
+++ b/sdk/test/Services/JsonProtocol/AWSSDK.JsonProtocol.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);BCL;AWS_ASYNC_API;CODE_ANALYSIS</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(RuleSetFileForBuild)' == 'false' Or '$(RuleSetFileForBuild)' == '' ">
diff --git a/sdk/test/Services/JsonProtocol/AWSSDK.JsonProtocol.NetStandard.csproj b/sdk/test/Services/JsonProtocol/AWSSDK.JsonProtocol.NetStandard.csproj
index 5da3506a76a8..a82ac3ff11f8 100644
--- a/sdk/test/Services/JsonProtocol/AWSSDK.JsonProtocol.NetStandard.csproj
+++ b/sdk/test/Services/JsonProtocol/AWSSDK.JsonProtocol.NetStandard.csproj
@@ -22,6 +22,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <!-- Async Enumerable Compatibility -->
diff --git a/sdk/test/Services/JsonProtocol/Generated/AmazonJsonProtocolConfig.cs b/sdk/test/Services/JsonProtocol/Generated/AmazonJsonProtocolConfig.cs
index cb7f3a7a1f68..7f468de8c803 100644
--- a/sdk/test/Services/JsonProtocol/Generated/AmazonJsonProtocolConfig.cs
+++ b/sdk/test/Services/JsonProtocol/Generated/AmazonJsonProtocolConfig.cs
@@ -34,7 +34,7 @@ namespace Amazon.JsonProtocol
     public partial class AmazonJsonProtocolConfig : ClientConfig
     {
         private static readonly string UserAgentString =
-            InternalSDKUtils.BuildUserAgentString("Json Protocol", "3.3");
+            InternalSDKUtils.BuildUserAgentString("Json Protocol", "4.0");
 
 
         private string _userAgent = UserAgentString;
diff --git a/sdk/test/Services/JsonProtocol/Properties/AssemblyInfo.cs b/sdk/test/Services/JsonProtocol/Properties/AssemblyInfo.cs
index cb5c84f37829..8d0676336718 100644
--- a/sdk/test/Services/JsonProtocol/Properties/AssemblyInfo.cs
+++ b/sdk/test/Services/JsonProtocol/Properties/AssemblyInfo.cs
@@ -41,5 +41,9 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.3")]
\ No newline at end of file
+#if BCL
+[assembly: AssemblyVersion("4.0")]
+#else
+[assembly: AssemblyVersion("4.0")]
+#endif
+[assembly: AssemblyFileVersion("4.0")]
\ No newline at end of file
diff --git a/sdk/test/Services/JsonProtocol/UnitTests/AWSSDK.UnitTests.JsonProtocol.NetFramework.csproj b/sdk/test/Services/JsonProtocol/UnitTests/AWSSDK.UnitTests.JsonProtocol.NetFramework.csproj
index d20ea1056bed..79161a164152 100644
--- a/sdk/test/Services/JsonProtocol/UnitTests/AWSSDK.UnitTests.JsonProtocol.NetFramework.csproj
+++ b/sdk/test/Services/JsonProtocol/UnitTests/AWSSDK.UnitTests.JsonProtocol.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);TRACE;BCL;ASYNC_AWAIT;DEBUG</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CS1591,CS0612,CS0618</NoWarn>
   </PropertyGroup>
   <ItemGroup>
diff --git a/sdk/test/Services/Kafka/UnitTests/AWSSDK.UnitTests.Kafka.NetFramework.csproj b/sdk/test/Services/Kafka/UnitTests/AWSSDK.UnitTests.Kafka.NetFramework.csproj
index 7d0d5b82ee4b..78fcd40df65f 100644
--- a/sdk/test/Services/Kafka/UnitTests/AWSSDK.UnitTests.Kafka.NetFramework.csproj
+++ b/sdk/test/Services/Kafka/UnitTests/AWSSDK.UnitTests.Kafka.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);TRACE;BCL;ASYNC_AWAIT;DEBUG</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CS1591,CS0612,CS0618</NoWarn>
   </PropertyGroup>
   <ItemGroup>
diff --git a/sdk/test/Services/KafkaConnect/UnitTests/AWSSDK.UnitTests.KafkaConnect.NetFramework.csproj b/sdk/test/Services/KafkaConnect/UnitTests/AWSSDK.UnitTests.KafkaConnect.NetFramework.csproj
index 927674abab4f..a475132210d7 100644
--- a/sdk/test/Services/KafkaConnect/UnitTests/AWSSDK.UnitTests.KafkaConnect.NetFramework.csproj
+++ b/sdk/test/Services/KafkaConnect/UnitTests/AWSSDK.UnitTests.KafkaConnect.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);TRACE;BCL;ASYNC_AWAIT;DEBUG</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CS1591,CS0612,CS0618</NoWarn>
   </PropertyGroup>
   <ItemGroup>
diff --git a/sdk/test/Services/Kendra/UnitTests/AWSSDK.UnitTests.Kendra.NetFramework.csproj b/sdk/test/Services/Kendra/UnitTests/AWSSDK.UnitTests.Kendra.NetFramework.csproj
index 0b12c9bd66e6..96a80810e1c2 100644
--- a/sdk/test/Services/Kendra/UnitTests/AWSSDK.UnitTests.Kendra.NetFramework.csproj
+++ b/sdk/test/Services/Kendra/UnitTests/AWSSDK.UnitTests.Kendra.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);TRACE;BCL;ASYNC_AWAIT;DEBUG</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CS1591,CS0612,CS0618</NoWarn>
   </PropertyGroup>
   <ItemGroup>
diff --git a/sdk/test/Services/KendraRanking/UnitTests/AWSSDK.UnitTests.KendraRanking.NetFramework.csproj b/sdk/test/Services/KendraRanking/UnitTests/AWSSDK.UnitTests.KendraRanking.NetFramework.csproj
index aee6f710c212..cab1fd1dd4a9 100644
--- a/sdk/test/Services/KendraRanking/UnitTests/AWSSDK.UnitTests.KendraRanking.NetFramework.csproj
+++ b/sdk/test/Services/KendraRanking/UnitTests/AWSSDK.UnitTests.KendraRanking.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);TRACE;BCL;ASYNC_AWAIT;DEBUG</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CS1591,CS0612,CS0618</NoWarn>
   </PropertyGroup>
   <ItemGroup>
diff --git a/sdk/test/Services/KeyManagementService/IntegrationTests/AWSSDK.IntegrationTests.KeyManagementService.NetFramework.csproj b/sdk/test/Services/KeyManagementService/IntegrationTests/AWSSDK.IntegrationTests.KeyManagementService.NetFramework.csproj
index 7791f7eefe35..cb29e6814c94 100644
--- a/sdk/test/Services/KeyManagementService/IntegrationTests/AWSSDK.IntegrationTests.KeyManagementService.NetFramework.csproj
+++ b/sdk/test/Services/KeyManagementService/IntegrationTests/AWSSDK.IntegrationTests.KeyManagementService.NetFramework.csproj
@@ -1,6 +1,6 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);DEBUG;TRACE;BCL;ASYNC_AWAIT;LOCAL_FILE</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>false</GenerateDocumentationFile>
diff --git a/sdk/test/Services/KeyManagementService/UnitTests/AWSSDK.UnitTests.KeyManagementService.NetFramework.csproj b/sdk/test/Services/KeyManagementService/UnitTests/AWSSDK.UnitTests.KeyManagementService.NetFramework.csproj
index d93e1c4b2da5..e91a5905614c 100644
--- a/sdk/test/Services/KeyManagementService/UnitTests/AWSSDK.UnitTests.KeyManagementService.NetFramework.csproj
+++ b/sdk/test/Services/KeyManagementService/UnitTests/AWSSDK.UnitTests.KeyManagementService.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);TRACE;BCL;ASYNC_AWAIT;DEBUG</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CS1591,CS0612,CS0618</NoWarn>
   </PropertyGroup>
   <ItemGroup>
diff --git a/sdk/test/Services/Keyspaces/UnitTests/AWSSDK.UnitTests.Keyspaces.NetFramework.csproj b/sdk/test/Services/Keyspaces/UnitTests/AWSSDK.UnitTests.Keyspaces.NetFramework.csproj
index 06cb9ae7b263..b015ba1ae8af 100644
--- a/sdk/test/Services/Keyspaces/UnitTests/AWSSDK.UnitTests.Keyspaces.NetFramework.csproj
+++ b/sdk/test/Services/Keyspaces/UnitTests/AWSSDK.UnitTests.Keyspaces.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);TRACE;BCL;ASYNC_AWAIT;DEBUG</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CS1591,CS0612,CS0618</NoWarn>
   </PropertyGroup>
   <ItemGroup>
diff --git a/sdk/test/Services/Kinesis/IntegrationTests/AWSSDK.IntegrationTests.Kinesis.NetFramework.csproj b/sdk/test/Services/Kinesis/IntegrationTests/AWSSDK.IntegrationTests.Kinesis.NetFramework.csproj
index 3523924a1dca..6a7d479dab70 100644
--- a/sdk/test/Services/Kinesis/IntegrationTests/AWSSDK.IntegrationTests.Kinesis.NetFramework.csproj
+++ b/sdk/test/Services/Kinesis/IntegrationTests/AWSSDK.IntegrationTests.Kinesis.NetFramework.csproj
@@ -1,6 +1,6 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);DEBUG;TRACE;BCL;ASYNC_AWAIT;LOCAL_FILE</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>false</GenerateDocumentationFile>
diff --git a/sdk/test/Services/Kinesis/UnitTests/AWSSDK.UnitTests.Kinesis.NetFramework.csproj b/sdk/test/Services/Kinesis/UnitTests/AWSSDK.UnitTests.Kinesis.NetFramework.csproj
index 770756a32b14..d2c64aeb4d84 100644
--- a/sdk/test/Services/Kinesis/UnitTests/AWSSDK.UnitTests.Kinesis.NetFramework.csproj
+++ b/sdk/test/Services/Kinesis/UnitTests/AWSSDK.UnitTests.Kinesis.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);TRACE;BCL;ASYNC_AWAIT;DEBUG</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CS1591,CS0612,CS0618</NoWarn>
   </PropertyGroup>
   <ItemGroup>
diff --git a/sdk/test/Services/KinesisAnalytics/UnitTests/AWSSDK.UnitTests.KinesisAnalytics.NetFramework.csproj b/sdk/test/Services/KinesisAnalytics/UnitTests/AWSSDK.UnitTests.KinesisAnalytics.NetFramework.csproj
index 50111ceba62b..32b42ff26521 100644
--- a/sdk/test/Services/KinesisAnalytics/UnitTests/AWSSDK.UnitTests.KinesisAnalytics.NetFramework.csproj
+++ b/sdk/test/Services/KinesisAnalytics/UnitTests/AWSSDK.UnitTests.KinesisAnalytics.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);TRACE;BCL;ASYNC_AWAIT;DEBUG</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CS1591,CS0612,CS0618</NoWarn>
   </PropertyGroup>
   <ItemGroup>
diff --git a/sdk/test/Services/KinesisAnalyticsV2/UnitTests/AWSSDK.UnitTests.KinesisAnalyticsV2.NetFramework.csproj b/sdk/test/Services/KinesisAnalyticsV2/UnitTests/AWSSDK.UnitTests.KinesisAnalyticsV2.NetFramework.csproj
index 729344acbe65..40e2fafba620 100644
--- a/sdk/test/Services/KinesisAnalyticsV2/UnitTests/AWSSDK.UnitTests.KinesisAnalyticsV2.NetFramework.csproj
+++ b/sdk/test/Services/KinesisAnalyticsV2/UnitTests/AWSSDK.UnitTests.KinesisAnalyticsV2.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);TRACE;BCL;ASYNC_AWAIT;DEBUG</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CS1591,CS0612,CS0618</NoWarn>
   </PropertyGroup>
   <ItemGroup>
diff --git a/sdk/test/Services/KinesisFirehose/IntegrationTests/AWSSDK.IntegrationTests.KinesisFirehose.NetFramework.csproj b/sdk/test/Services/KinesisFirehose/IntegrationTests/AWSSDK.IntegrationTests.KinesisFirehose.NetFramework.csproj
index 6eb574a0cd87..90b35c17a758 100644
--- a/sdk/test/Services/KinesisFirehose/IntegrationTests/AWSSDK.IntegrationTests.KinesisFirehose.NetFramework.csproj
+++ b/sdk/test/Services/KinesisFirehose/IntegrationTests/AWSSDK.IntegrationTests.KinesisFirehose.NetFramework.csproj
@@ -1,6 +1,6 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);DEBUG;TRACE;BCL;ASYNC_AWAIT;LOCAL_FILE</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>false</GenerateDocumentationFile>
diff --git a/sdk/test/Services/KinesisFirehose/UnitTests/AWSSDK.UnitTests.KinesisFirehose.NetFramework.csproj b/sdk/test/Services/KinesisFirehose/UnitTests/AWSSDK.UnitTests.KinesisFirehose.NetFramework.csproj
index 60cc5ac17420..791019217394 100644
--- a/sdk/test/Services/KinesisFirehose/UnitTests/AWSSDK.UnitTests.KinesisFirehose.NetFramework.csproj
+++ b/sdk/test/Services/KinesisFirehose/UnitTests/AWSSDK.UnitTests.KinesisFirehose.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);TRACE;BCL;ASYNC_AWAIT;DEBUG</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CS1591,CS0612,CS0618</NoWarn>
   </PropertyGroup>
   <ItemGroup>
diff --git a/sdk/test/Services/KinesisVideo/UnitTests/AWSSDK.UnitTests.KinesisVideo.NetFramework.csproj b/sdk/test/Services/KinesisVideo/UnitTests/AWSSDK.UnitTests.KinesisVideo.NetFramework.csproj
index d87f812bf106..ee53e5cb723e 100644
--- a/sdk/test/Services/KinesisVideo/UnitTests/AWSSDK.UnitTests.KinesisVideo.NetFramework.csproj
+++ b/sdk/test/Services/KinesisVideo/UnitTests/AWSSDK.UnitTests.KinesisVideo.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);TRACE;BCL;ASYNC_AWAIT;DEBUG</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CS1591,CS0612,CS0618</NoWarn>
   </PropertyGroup>
   <ItemGroup>
diff --git a/sdk/test/Services/KinesisVideoArchivedMedia/UnitTests/AWSSDK.UnitTests.KinesisVideoArchivedMedia.NetFramework.csproj b/sdk/test/Services/KinesisVideoArchivedMedia/UnitTests/AWSSDK.UnitTests.KinesisVideoArchivedMedia.NetFramework.csproj
index 4ff1b5629201..5a78f19bae1f 100644
--- a/sdk/test/Services/KinesisVideoArchivedMedia/UnitTests/AWSSDK.UnitTests.KinesisVideoArchivedMedia.NetFramework.csproj
+++ b/sdk/test/Services/KinesisVideoArchivedMedia/UnitTests/AWSSDK.UnitTests.KinesisVideoArchivedMedia.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);TRACE;BCL;ASYNC_AWAIT;DEBUG</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CS1591,CS0612,CS0618</NoWarn>
   </PropertyGroup>
   <ItemGroup>
diff --git a/sdk/test/Services/KinesisVideoMedia/UnitTests/AWSSDK.UnitTests.KinesisVideoMedia.NetFramework.csproj b/sdk/test/Services/KinesisVideoMedia/UnitTests/AWSSDK.UnitTests.KinesisVideoMedia.NetFramework.csproj
index b926c3c1d816..c45a48161172 100644
--- a/sdk/test/Services/KinesisVideoMedia/UnitTests/AWSSDK.UnitTests.KinesisVideoMedia.NetFramework.csproj
+++ b/sdk/test/Services/KinesisVideoMedia/UnitTests/AWSSDK.UnitTests.KinesisVideoMedia.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);TRACE;BCL;ASYNC_AWAIT;DEBUG</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CS1591,CS0612,CS0618</NoWarn>
   </PropertyGroup>
   <ItemGroup>
diff --git a/sdk/test/Services/KinesisVideoSignalingChannels/UnitTests/AWSSDK.UnitTests.KinesisVideoSignalingChannels.NetFramework.csproj b/sdk/test/Services/KinesisVideoSignalingChannels/UnitTests/AWSSDK.UnitTests.KinesisVideoSignalingChannels.NetFramework.csproj
index a354ed892e47..ecbdd27f9ad1 100644
--- a/sdk/test/Services/KinesisVideoSignalingChannels/UnitTests/AWSSDK.UnitTests.KinesisVideoSignalingChannels.NetFramework.csproj
+++ b/sdk/test/Services/KinesisVideoSignalingChannels/UnitTests/AWSSDK.UnitTests.KinesisVideoSignalingChannels.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);TRACE;BCL;ASYNC_AWAIT;DEBUG</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CS1591,CS0612,CS0618</NoWarn>
   </PropertyGroup>
   <ItemGroup>
diff --git a/sdk/test/Services/KinesisVideoWebRTCStorage/UnitTests/AWSSDK.UnitTests.KinesisVideoWebRTCStorage.NetFramework.csproj b/sdk/test/Services/KinesisVideoWebRTCStorage/UnitTests/AWSSDK.UnitTests.KinesisVideoWebRTCStorage.NetFramework.csproj
index a1314e9acc3b..977bfd04d9e9 100644
--- a/sdk/test/Services/KinesisVideoWebRTCStorage/UnitTests/AWSSDK.UnitTests.KinesisVideoWebRTCStorage.NetFramework.csproj
+++ b/sdk/test/Services/KinesisVideoWebRTCStorage/UnitTests/AWSSDK.UnitTests.KinesisVideoWebRTCStorage.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);TRACE;BCL;ASYNC_AWAIT;DEBUG</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CS1591,CS0612,CS0618</NoWarn>
   </PropertyGroup>
   <ItemGroup>
diff --git a/sdk/test/Services/LakeFormation/UnitTests/AWSSDK.UnitTests.LakeFormation.NetFramework.csproj b/sdk/test/Services/LakeFormation/UnitTests/AWSSDK.UnitTests.LakeFormation.NetFramework.csproj
index beac8781154c..0d8b6a0a7b81 100644
--- a/sdk/test/Services/LakeFormation/UnitTests/AWSSDK.UnitTests.LakeFormation.NetFramework.csproj
+++ b/sdk/test/Services/LakeFormation/UnitTests/AWSSDK.UnitTests.LakeFormation.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);TRACE;BCL;ASYNC_AWAIT;DEBUG</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CS1591,CS0612,CS0618</NoWarn>
   </PropertyGroup>
   <ItemGroup>
diff --git a/sdk/test/Services/Lambda/IntegrationTests/AWSSDK.IntegrationTests.Lambda.NetFramework.csproj b/sdk/test/Services/Lambda/IntegrationTests/AWSSDK.IntegrationTests.Lambda.NetFramework.csproj
index e3ef0ef799d1..4726ab4a0785 100644
--- a/sdk/test/Services/Lambda/IntegrationTests/AWSSDK.IntegrationTests.Lambda.NetFramework.csproj
+++ b/sdk/test/Services/Lambda/IntegrationTests/AWSSDK.IntegrationTests.Lambda.NetFramework.csproj
@@ -1,6 +1,6 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);DEBUG;TRACE;BCL;ASYNC_AWAIT;LOCAL_FILE</DefineConstants>
     <DebugType>portable</DebugType>
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diff --git a/sdk/test/Services/Lambda/UnitTests/AWSSDK.UnitTests.Lambda.NetFramework.csproj b/sdk/test/Services/Lambda/UnitTests/AWSSDK.UnitTests.Lambda.NetFramework.csproj
index 0a5f408adb37..5b3bd2b07c2e 100644
--- a/sdk/test/Services/Lambda/UnitTests/AWSSDK.UnitTests.Lambda.NetFramework.csproj
+++ b/sdk/test/Services/Lambda/UnitTests/AWSSDK.UnitTests.Lambda.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);TRACE;BCL;ASYNC_AWAIT;DEBUG</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
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   <ItemGroup>
diff --git a/sdk/test/Services/LaunchWizard/UnitTests/AWSSDK.UnitTests.LaunchWizard.NetFramework.csproj b/sdk/test/Services/LaunchWizard/UnitTests/AWSSDK.UnitTests.LaunchWizard.NetFramework.csproj
index 9fbc6cc17b72..3f5378866d5a 100644
--- a/sdk/test/Services/LaunchWizard/UnitTests/AWSSDK.UnitTests.LaunchWizard.NetFramework.csproj
+++ b/sdk/test/Services/LaunchWizard/UnitTests/AWSSDK.UnitTests.LaunchWizard.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
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     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
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diff --git a/sdk/test/Services/Lex/UnitTests/AWSSDK.UnitTests.Lex.NetFramework.csproj b/sdk/test/Services/Lex/UnitTests/AWSSDK.UnitTests.Lex.NetFramework.csproj
index 7af64700af35..99fb1a02bfc8 100644
--- a/sdk/test/Services/Lex/UnitTests/AWSSDK.UnitTests.Lex.NetFramework.csproj
+++ b/sdk/test/Services/Lex/UnitTests/AWSSDK.UnitTests.Lex.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
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     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
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+    <LangVersion>9.0</LangVersion>
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diff --git a/sdk/test/Services/LexModelBuildingService/UnitTests/AWSSDK.UnitTests.LexModelBuildingService.NetFramework.csproj b/sdk/test/Services/LexModelBuildingService/UnitTests/AWSSDK.UnitTests.LexModelBuildingService.NetFramework.csproj
index 4bd38c276727..7c5c69be945a 100644
--- a/sdk/test/Services/LexModelBuildingService/UnitTests/AWSSDK.UnitTests.LexModelBuildingService.NetFramework.csproj
+++ b/sdk/test/Services/LexModelBuildingService/UnitTests/AWSSDK.UnitTests.LexModelBuildingService.NetFramework.csproj
@@ -1,7 +1,7 @@
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    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
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@@ -19,6 +19,7 @@
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+    <LangVersion>9.0</LangVersion>
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diff --git a/sdk/test/Services/LexModelsV2/UnitTests/AWSSDK.UnitTests.LexModelsV2.NetFramework.csproj b/sdk/test/Services/LexModelsV2/UnitTests/AWSSDK.UnitTests.LexModelsV2.NetFramework.csproj
index d06f78ec5ad7..9931811d3b0d 100644
--- a/sdk/test/Services/LexModelsV2/UnitTests/AWSSDK.UnitTests.LexModelsV2.NetFramework.csproj
+++ b/sdk/test/Services/LexModelsV2/UnitTests/AWSSDK.UnitTests.LexModelsV2.NetFramework.csproj
@@ -1,7 +1,7 @@
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    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
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@@ -19,6 +19,7 @@
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+    <LangVersion>9.0</LangVersion>
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diff --git a/sdk/test/Services/LexRuntimeV2/UnitTests/AWSSDK.UnitTests.LexRuntimeV2.NetFramework.csproj b/sdk/test/Services/LexRuntimeV2/UnitTests/AWSSDK.UnitTests.LexRuntimeV2.NetFramework.csproj
index 7b15cee969cf..b780bbedb4e3 100644
--- a/sdk/test/Services/LexRuntimeV2/UnitTests/AWSSDK.UnitTests.LexRuntimeV2.NetFramework.csproj
+++ b/sdk/test/Services/LexRuntimeV2/UnitTests/AWSSDK.UnitTests.LexRuntimeV2.NetFramework.csproj
@@ -1,7 +1,7 @@
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    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
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@@ -19,6 +19,7 @@
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+    <LangVersion>9.0</LangVersion>
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diff --git a/sdk/test/Services/LicenseManager/UnitTests/AWSSDK.UnitTests.LicenseManager.NetFramework.csproj b/sdk/test/Services/LicenseManager/UnitTests/AWSSDK.UnitTests.LicenseManager.NetFramework.csproj
index 12581340cfe4..6c67544f7706 100644
--- a/sdk/test/Services/LicenseManager/UnitTests/AWSSDK.UnitTests.LicenseManager.NetFramework.csproj
+++ b/sdk/test/Services/LicenseManager/UnitTests/AWSSDK.UnitTests.LicenseManager.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
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    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
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@@ -19,6 +19,7 @@
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+    <LangVersion>9.0</LangVersion>
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diff --git a/sdk/test/Services/LicenseManagerLinuxSubscriptions/UnitTests/AWSSDK.UnitTests.LicenseManagerLinuxSubscriptions.NetFramework.csproj b/sdk/test/Services/LicenseManagerLinuxSubscriptions/UnitTests/AWSSDK.UnitTests.LicenseManagerLinuxSubscriptions.NetFramework.csproj
index 83db68fb0025..324da0272267 100644
--- a/sdk/test/Services/LicenseManagerLinuxSubscriptions/UnitTests/AWSSDK.UnitTests.LicenseManagerLinuxSubscriptions.NetFramework.csproj
+++ b/sdk/test/Services/LicenseManagerLinuxSubscriptions/UnitTests/AWSSDK.UnitTests.LicenseManagerLinuxSubscriptions.NetFramework.csproj
@@ -1,7 +1,7 @@
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    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
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@@ -19,6 +19,7 @@
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+    <LangVersion>9.0</LangVersion>
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diff --git a/sdk/test/Services/LicenseManagerUserSubscriptions/UnitTests/AWSSDK.UnitTests.LicenseManagerUserSubscriptions.NetFramework.csproj b/sdk/test/Services/LicenseManagerUserSubscriptions/UnitTests/AWSSDK.UnitTests.LicenseManagerUserSubscriptions.NetFramework.csproj
index 8a15417b77e7..7d06a6af7427 100644
--- a/sdk/test/Services/LicenseManagerUserSubscriptions/UnitTests/AWSSDK.UnitTests.LicenseManagerUserSubscriptions.NetFramework.csproj
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@@ -1,7 +1,7 @@
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    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
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@@ -19,6 +19,7 @@
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+    <LangVersion>9.0</LangVersion>
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diff --git a/sdk/test/Services/Lightsail/IntegrationTests/AWSSDK.IntegrationTests.Lightsail.NetFramework.csproj b/sdk/test/Services/Lightsail/IntegrationTests/AWSSDK.IntegrationTests.Lightsail.NetFramework.csproj
index 34152fbdb6dd..d7eb6927a761 100644
--- a/sdk/test/Services/Lightsail/IntegrationTests/AWSSDK.IntegrationTests.Lightsail.NetFramework.csproj
+++ b/sdk/test/Services/Lightsail/IntegrationTests/AWSSDK.IntegrationTests.Lightsail.NetFramework.csproj
@@ -1,6 +1,6 @@
 <Project Sdk="Microsoft.NET.Sdk">
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-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
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     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>false</GenerateDocumentationFile>
diff --git a/sdk/test/Services/Lightsail/UnitTests/AWSSDK.UnitTests.Lightsail.NetFramework.csproj b/sdk/test/Services/Lightsail/UnitTests/AWSSDK.UnitTests.Lightsail.NetFramework.csproj
index 73f4947c62af..ae174ac922d9 100644
--- a/sdk/test/Services/Lightsail/UnitTests/AWSSDK.UnitTests.Lightsail.NetFramework.csproj
+++ b/sdk/test/Services/Lightsail/UnitTests/AWSSDK.UnitTests.Lightsail.NetFramework.csproj
@@ -1,7 +1,7 @@
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    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
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@@ -19,6 +19,7 @@
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+    <LangVersion>9.0</LangVersion>
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diff --git a/sdk/test/Services/LocationService/UnitTests/AWSSDK.UnitTests.LocationService.NetFramework.csproj b/sdk/test/Services/LocationService/UnitTests/AWSSDK.UnitTests.LocationService.NetFramework.csproj
index 2ad5cb26bff0..7ac5ea19ca99 100644
--- a/sdk/test/Services/LocationService/UnitTests/AWSSDK.UnitTests.LocationService.NetFramework.csproj
+++ b/sdk/test/Services/LocationService/UnitTests/AWSSDK.UnitTests.LocationService.NetFramework.csproj
@@ -1,7 +1,7 @@
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    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
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@@ -19,6 +19,7 @@
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+    <LangVersion>9.0</LangVersion>
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diff --git a/sdk/test/Services/LookoutEquipment/UnitTests/AWSSDK.UnitTests.LookoutEquipment.NetFramework.csproj b/sdk/test/Services/LookoutEquipment/UnitTests/AWSSDK.UnitTests.LookoutEquipment.NetFramework.csproj
index adda56f7e109..1111a980bd1b 100644
--- a/sdk/test/Services/LookoutEquipment/UnitTests/AWSSDK.UnitTests.LookoutEquipment.NetFramework.csproj
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@@ -1,7 +1,7 @@
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    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
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@@ -19,6 +19,7 @@
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+    <LangVersion>9.0</LangVersion>
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diff --git a/sdk/test/Services/LookoutMetrics/UnitTests/AWSSDK.UnitTests.LookoutMetrics.NetFramework.csproj b/sdk/test/Services/LookoutMetrics/UnitTests/AWSSDK.UnitTests.LookoutMetrics.NetFramework.csproj
index c67a857934f7..56d34bb4ff20 100644
--- a/sdk/test/Services/LookoutMetrics/UnitTests/AWSSDK.UnitTests.LookoutMetrics.NetFramework.csproj
+++ b/sdk/test/Services/LookoutMetrics/UnitTests/AWSSDK.UnitTests.LookoutMetrics.NetFramework.csproj
@@ -1,7 +1,7 @@
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-    <TargetFramework>net462</TargetFramework>
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@@ -19,6 +19,7 @@
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+    <LangVersion>9.0</LangVersion>
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diff --git a/sdk/test/Services/LookoutforVision/UnitTests/AWSSDK.UnitTests.LookoutforVision.NetFramework.csproj b/sdk/test/Services/LookoutforVision/UnitTests/AWSSDK.UnitTests.LookoutforVision.NetFramework.csproj
index 048271b004a6..a7f129531179 100644
--- a/sdk/test/Services/LookoutforVision/UnitTests/AWSSDK.UnitTests.LookoutforVision.NetFramework.csproj
+++ b/sdk/test/Services/LookoutforVision/UnitTests/AWSSDK.UnitTests.LookoutforVision.NetFramework.csproj
@@ -1,7 +1,7 @@
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    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
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@@ -19,6 +19,7 @@
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+    <LangVersion>9.0</LangVersion>
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diff --git a/sdk/test/Services/MQ/UnitTests/AWSSDK.UnitTests.MQ.NetFramework.csproj b/sdk/test/Services/MQ/UnitTests/AWSSDK.UnitTests.MQ.NetFramework.csproj
index 6152d9ba445c..b3449f97b859 100644
--- a/sdk/test/Services/MQ/UnitTests/AWSSDK.UnitTests.MQ.NetFramework.csproj
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@@ -1,7 +1,7 @@
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@@ -19,6 +19,7 @@
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+    <LangVersion>9.0</LangVersion>
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diff --git a/sdk/test/Services/MTurk/UnitTests/AWSSDK.UnitTests.MTurk.NetFramework.csproj b/sdk/test/Services/MTurk/UnitTests/AWSSDK.UnitTests.MTurk.NetFramework.csproj
index b65b8fb8af3e..ed76ca5e4345 100644
--- a/sdk/test/Services/MTurk/UnitTests/AWSSDK.UnitTests.MTurk.NetFramework.csproj
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@@ -1,7 +1,7 @@
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@@ -19,6 +19,7 @@
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+    <LangVersion>9.0</LangVersion>
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diff --git a/sdk/test/Services/MWAA/UnitTests/AWSSDK.UnitTests.MWAA.NetFramework.csproj b/sdk/test/Services/MWAA/UnitTests/AWSSDK.UnitTests.MWAA.NetFramework.csproj
index 7542b0d21e8a..15eb572ab4a9 100644
--- a/sdk/test/Services/MWAA/UnitTests/AWSSDK.UnitTests.MWAA.NetFramework.csproj
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@@ -1,7 +1,7 @@
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@@ -19,6 +19,7 @@
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+    <LangVersion>9.0</LangVersion>
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diff --git a/sdk/test/Services/MachineLearning/IntegrationTests/AWSSDK.IntegrationTests.MachineLearning.NetFramework.csproj b/sdk/test/Services/MachineLearning/IntegrationTests/AWSSDK.IntegrationTests.MachineLearning.NetFramework.csproj
index 5e6f2064d133..1fb38a4f32ae 100644
--- a/sdk/test/Services/MachineLearning/IntegrationTests/AWSSDK.IntegrationTests.MachineLearning.NetFramework.csproj
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@@ -1,6 +1,6 @@
 <Project Sdk="Microsoft.NET.Sdk">
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diff --git a/sdk/test/Services/MachineLearning/UnitTests/AWSSDK.UnitTests.MachineLearning.NetFramework.csproj b/sdk/test/Services/MachineLearning/UnitTests/AWSSDK.UnitTests.MachineLearning.NetFramework.csproj
index f483fd63a306..5796f2798aca 100644
--- a/sdk/test/Services/MachineLearning/UnitTests/AWSSDK.UnitTests.MachineLearning.NetFramework.csproj
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@@ -1,7 +1,7 @@
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@@ -19,6 +19,7 @@
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diff --git a/sdk/test/Services/Macie2/UnitTests/AWSSDK.UnitTests.Macie2.NetFramework.csproj b/sdk/test/Services/Macie2/UnitTests/AWSSDK.UnitTests.Macie2.NetFramework.csproj
index e2adbd696d84..00d3ff990eaf 100644
--- a/sdk/test/Services/Macie2/UnitTests/AWSSDK.UnitTests.Macie2.NetFramework.csproj
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@@ -1,7 +1,7 @@
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    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
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@@ -19,6 +19,7 @@
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+    <LangVersion>9.0</LangVersion>
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diff --git a/sdk/test/Services/MainframeModernization/UnitTests/AWSSDK.UnitTests.MainframeModernization.NetFramework.csproj b/sdk/test/Services/MainframeModernization/UnitTests/AWSSDK.UnitTests.MainframeModernization.NetFramework.csproj
index 8fe4ec8570f5..3a332fd98015 100644
--- a/sdk/test/Services/MainframeModernization/UnitTests/AWSSDK.UnitTests.MainframeModernization.NetFramework.csproj
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@@ -1,7 +1,7 @@
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-    <TargetFramework>net462</TargetFramework>
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@@ -19,6 +19,7 @@
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+    <LangVersion>9.0</LangVersion>
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diff --git a/sdk/test/Services/ManagedBlockchain/UnitTests/AWSSDK.UnitTests.ManagedBlockchain.NetFramework.csproj b/sdk/test/Services/ManagedBlockchain/UnitTests/AWSSDK.UnitTests.ManagedBlockchain.NetFramework.csproj
index e39de71048c3..21df037d8fc2 100644
--- a/sdk/test/Services/ManagedBlockchain/UnitTests/AWSSDK.UnitTests.ManagedBlockchain.NetFramework.csproj
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@@ -1,7 +1,7 @@
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@@ -19,6 +19,7 @@
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+    <LangVersion>9.0</LangVersion>
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diff --git a/sdk/test/Services/ManagedBlockchainQuery/UnitTests/AWSSDK.UnitTests.ManagedBlockchainQuery.NetFramework.csproj b/sdk/test/Services/ManagedBlockchainQuery/UnitTests/AWSSDK.UnitTests.ManagedBlockchainQuery.NetFramework.csproj
index 432094219654..d265e4eb7841 100644
--- a/sdk/test/Services/ManagedBlockchainQuery/UnitTests/AWSSDK.UnitTests.ManagedBlockchainQuery.NetFramework.csproj
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    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
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@@ -19,6 +19,7 @@
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+    <LangVersion>9.0</LangVersion>
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diff --git a/sdk/test/Services/ManagedGrafana/UnitTests/AWSSDK.UnitTests.ManagedGrafana.NetFramework.csproj b/sdk/test/Services/ManagedGrafana/UnitTests/AWSSDK.UnitTests.ManagedGrafana.NetFramework.csproj
index 17100e66f6c8..f14c886e0d3e 100644
--- a/sdk/test/Services/ManagedGrafana/UnitTests/AWSSDK.UnitTests.ManagedGrafana.NetFramework.csproj
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@@ -19,6 +19,7 @@
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+    <LangVersion>9.0</LangVersion>
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diff --git a/sdk/test/Services/MarketplaceAgreement/UnitTests/AWSSDK.UnitTests.MarketplaceAgreement.NetFramework.csproj b/sdk/test/Services/MarketplaceAgreement/UnitTests/AWSSDK.UnitTests.MarketplaceAgreement.NetFramework.csproj
index c85e23ed6d8f..478d2217fa68 100644
--- a/sdk/test/Services/MarketplaceAgreement/UnitTests/AWSSDK.UnitTests.MarketplaceAgreement.NetFramework.csproj
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@@ -19,6 +19,7 @@
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+    <LangVersion>9.0</LangVersion>
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diff --git a/sdk/test/Services/MarketplaceCatalog/UnitTests/AWSSDK.UnitTests.MarketplaceCatalog.NetFramework.csproj b/sdk/test/Services/MarketplaceCatalog/UnitTests/AWSSDK.UnitTests.MarketplaceCatalog.NetFramework.csproj
index d45c534cb167..1cf231be8899 100644
--- a/sdk/test/Services/MarketplaceCatalog/UnitTests/AWSSDK.UnitTests.MarketplaceCatalog.NetFramework.csproj
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diff --git a/sdk/test/Services/MarketplaceDeployment/UnitTests/AWSSDK.UnitTests.MarketplaceDeployment.NetFramework.csproj b/sdk/test/Services/MarketplaceDeployment/UnitTests/AWSSDK.UnitTests.MarketplaceDeployment.NetFramework.csproj
index 1c4c5cc019ec..c479cc132f8e 100644
--- a/sdk/test/Services/MarketplaceDeployment/UnitTests/AWSSDK.UnitTests.MarketplaceDeployment.NetFramework.csproj
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diff --git a/sdk/test/Services/MarketplaceEntitlementService/UnitTests/AWSSDK.UnitTests.MarketplaceEntitlementService.NetFramework.csproj b/sdk/test/Services/MarketplaceEntitlementService/UnitTests/AWSSDK.UnitTests.MarketplaceEntitlementService.NetFramework.csproj
index 041e87fd3190..ed3b68afc268 100644
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diff --git a/sdk/test/Services/MediaConnect/UnitTests/AWSSDK.UnitTests.MediaConnect.NetFramework.csproj b/sdk/test/Services/MediaConnect/UnitTests/AWSSDK.UnitTests.MediaConnect.NetFramework.csproj
index 7d04b4c5454e..28687720ab4e 100644
--- a/sdk/test/Services/MediaConnect/UnitTests/AWSSDK.UnitTests.MediaConnect.NetFramework.csproj
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+    <LangVersion>9.0</LangVersion>
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diff --git a/sdk/test/Services/MediaConvert/UnitTests/AWSSDK.UnitTests.MediaConvert.NetFramework.csproj b/sdk/test/Services/MediaConvert/UnitTests/AWSSDK.UnitTests.MediaConvert.NetFramework.csproj
index afce25e78697..442abfc04e11 100644
--- a/sdk/test/Services/MediaConvert/UnitTests/AWSSDK.UnitTests.MediaConvert.NetFramework.csproj
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+    <LangVersion>9.0</LangVersion>
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diff --git a/sdk/test/Services/MediaLive/UnitTests/AWSSDK.UnitTests.MediaLive.NetFramework.csproj b/sdk/test/Services/MediaLive/UnitTests/AWSSDK.UnitTests.MediaLive.NetFramework.csproj
index 9d77433916d4..a30e80481018 100644
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diff --git a/sdk/test/Services/MediaPackage/UnitTests/AWSSDK.UnitTests.MediaPackage.NetFramework.csproj b/sdk/test/Services/MediaPackage/UnitTests/AWSSDK.UnitTests.MediaPackage.NetFramework.csproj
index 94b3acc5058a..2b3f5f7d36ad 100644
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diff --git a/sdk/test/Services/MediaPackageV2/UnitTests/AWSSDK.UnitTests.MediaPackageV2.NetFramework.csproj b/sdk/test/Services/MediaPackageV2/UnitTests/AWSSDK.UnitTests.MediaPackageV2.NetFramework.csproj
index 1c6acc697324..670ba6f06d3a 100644
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diff --git a/sdk/test/Services/MediaPackageVod/UnitTests/AWSSDK.UnitTests.MediaPackageVod.NetFramework.csproj b/sdk/test/Services/MediaPackageVod/UnitTests/AWSSDK.UnitTests.MediaPackageVod.NetFramework.csproj
index b562e6a22c99..b689b9455156 100644
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diff --git a/sdk/test/Services/MediaStore/UnitTests/AWSSDK.UnitTests.MediaStore.NetFramework.csproj b/sdk/test/Services/MediaStore/UnitTests/AWSSDK.UnitTests.MediaStore.NetFramework.csproj
index c6bad3e18f23..23bd1a198470 100644
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diff --git a/sdk/test/Services/MediaStoreData/UnitTests/AWSSDK.UnitTests.MediaStoreData.NetFramework.csproj b/sdk/test/Services/MediaStoreData/UnitTests/AWSSDK.UnitTests.MediaStoreData.NetFramework.csproj
index 35952acf68b7..95c7b57da43b 100644
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@@ -19,6 +19,7 @@
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diff --git a/sdk/test/Services/MediaTailor/UnitTests/AWSSDK.UnitTests.MediaTailor.NetFramework.csproj b/sdk/test/Services/MediaTailor/UnitTests/AWSSDK.UnitTests.MediaTailor.NetFramework.csproj
index 9408e4fb498a..b8970699fdd2 100644
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diff --git a/sdk/test/Services/MedicalImaging/UnitTests/AWSSDK.UnitTests.MedicalImaging.NetFramework.csproj b/sdk/test/Services/MedicalImaging/UnitTests/AWSSDK.UnitTests.MedicalImaging.NetFramework.csproj
index ce1ad3a29215..c8a329bf5f1d 100644
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@@ -19,6 +19,7 @@
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diff --git a/sdk/test/Services/MemoryDB/UnitTests/AWSSDK.UnitTests.MemoryDB.NetFramework.csproj b/sdk/test/Services/MemoryDB/UnitTests/AWSSDK.UnitTests.MemoryDB.NetFramework.csproj
index 496d430979c6..324c82116123 100644
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@@ -19,6 +19,7 @@
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diff --git a/sdk/test/Services/Mgn/UnitTests/AWSSDK.UnitTests.Mgn.NetFramework.csproj b/sdk/test/Services/Mgn/UnitTests/AWSSDK.UnitTests.Mgn.NetFramework.csproj
index 585a43f7abc8..c7690c39b79d 100644
--- a/sdk/test/Services/Mgn/UnitTests/AWSSDK.UnitTests.Mgn.NetFramework.csproj
+++ b/sdk/test/Services/Mgn/UnitTests/AWSSDK.UnitTests.Mgn.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
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     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
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     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
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   <ItemGroup>
diff --git a/sdk/test/Services/MigrationHub/UnitTests/AWSSDK.UnitTests.MigrationHub.NetFramework.csproj b/sdk/test/Services/MigrationHub/UnitTests/AWSSDK.UnitTests.MigrationHub.NetFramework.csproj
index ad36438c1e24..7a846d89b3f2 100644
--- a/sdk/test/Services/MigrationHub/UnitTests/AWSSDK.UnitTests.MigrationHub.NetFramework.csproj
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@@ -1,7 +1,7 @@
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    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
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     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
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+    <LangVersion>9.0</LangVersion>
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diff --git a/sdk/test/Services/MigrationHubConfig/UnitTests/AWSSDK.UnitTests.MigrationHubConfig.NetFramework.csproj b/sdk/test/Services/MigrationHubConfig/UnitTests/AWSSDK.UnitTests.MigrationHubConfig.NetFramework.csproj
index 9596be2e4082..dad20469d1e0 100644
--- a/sdk/test/Services/MigrationHubConfig/UnitTests/AWSSDK.UnitTests.MigrationHubConfig.NetFramework.csproj
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@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
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    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
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@@ -19,6 +19,7 @@
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+    <LangVersion>9.0</LangVersion>
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diff --git a/sdk/test/Services/MigrationHubOrchestrator/UnitTests/AWSSDK.UnitTests.MigrationHubOrchestrator.NetFramework.csproj b/sdk/test/Services/MigrationHubOrchestrator/UnitTests/AWSSDK.UnitTests.MigrationHubOrchestrator.NetFramework.csproj
index 1a1ad08294ac..06b16abef939 100644
--- a/sdk/test/Services/MigrationHubOrchestrator/UnitTests/AWSSDK.UnitTests.MigrationHubOrchestrator.NetFramework.csproj
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@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
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    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
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     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
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+    <LangVersion>9.0</LangVersion>
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diff --git a/sdk/test/Services/MigrationHubRefactorSpaces/UnitTests/AWSSDK.UnitTests.MigrationHubRefactorSpaces.NetFramework.csproj b/sdk/test/Services/MigrationHubRefactorSpaces/UnitTests/AWSSDK.UnitTests.MigrationHubRefactorSpaces.NetFramework.csproj
index 6b8197101838..0f9a244338f8 100644
--- a/sdk/test/Services/MigrationHubRefactorSpaces/UnitTests/AWSSDK.UnitTests.MigrationHubRefactorSpaces.NetFramework.csproj
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@@ -1,7 +1,7 @@
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    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
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@@ -19,6 +19,7 @@
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+    <LangVersion>9.0</LangVersion>
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diff --git a/sdk/test/Services/MigrationHubStrategyRecommendations/UnitTests/AWSSDK.UnitTests.MigrationHubStrategyRecommendations.NetFramework.csproj b/sdk/test/Services/MigrationHubStrategyRecommendations/UnitTests/AWSSDK.UnitTests.MigrationHubStrategyRecommendations.NetFramework.csproj
index f87ebec6b7e8..dcecdbc0a115 100644
--- a/sdk/test/Services/MigrationHubStrategyRecommendations/UnitTests/AWSSDK.UnitTests.MigrationHubStrategyRecommendations.NetFramework.csproj
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@@ -1,7 +1,7 @@
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@@ -19,6 +19,7 @@
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+    <LangVersion>9.0</LangVersion>
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diff --git a/sdk/test/Services/Mobile/UnitTests/AWSSDK.UnitTests.Mobile.NetFramework.csproj b/sdk/test/Services/Mobile/UnitTests/AWSSDK.UnitTests.Mobile.NetFramework.csproj
index 7a4a21797fe9..14e46265cdef 100644
--- a/sdk/test/Services/Mobile/UnitTests/AWSSDK.UnitTests.Mobile.NetFramework.csproj
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@@ -1,7 +1,7 @@
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@@ -19,6 +19,7 @@
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+    <LangVersion>9.0</LangVersion>
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diff --git a/sdk/test/Services/MobileAnalytics/UnitTests/AWSSDK.UnitTests.MobileAnalytics.NetFramework.csproj b/sdk/test/Services/MobileAnalytics/UnitTests/AWSSDK.UnitTests.MobileAnalytics.NetFramework.csproj
index f1330a6d87cb..c23daec1ab18 100644
--- a/sdk/test/Services/MobileAnalytics/UnitTests/AWSSDK.UnitTests.MobileAnalytics.NetFramework.csproj
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@@ -1,7 +1,7 @@
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    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
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@@ -19,6 +19,7 @@
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+    <LangVersion>9.0</LangVersion>
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diff --git a/sdk/test/Services/Neptune/UnitTests/AWSSDK.UnitTests.Neptune.NetFramework.csproj b/sdk/test/Services/Neptune/UnitTests/AWSSDK.UnitTests.Neptune.NetFramework.csproj
index c77813a7cb42..120b53198bf4 100644
--- a/sdk/test/Services/Neptune/UnitTests/AWSSDK.UnitTests.Neptune.NetFramework.csproj
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@@ -1,7 +1,7 @@
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@@ -19,6 +19,7 @@
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+    <LangVersion>9.0</LangVersion>
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diff --git a/sdk/test/Services/NeptuneGraph/UnitTests/AWSSDK.UnitTests.NeptuneGraph.NetFramework.csproj b/sdk/test/Services/NeptuneGraph/UnitTests/AWSSDK.UnitTests.NeptuneGraph.NetFramework.csproj
index 5bffc0fb0f6e..7181d6a7755b 100644
--- a/sdk/test/Services/NeptuneGraph/UnitTests/AWSSDK.UnitTests.NeptuneGraph.NetFramework.csproj
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@@ -1,7 +1,7 @@
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@@ -19,6 +19,7 @@
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+    <LangVersion>9.0</LangVersion>
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diff --git a/sdk/test/Services/Neptunedata/UnitTests/AWSSDK.UnitTests.Neptunedata.NetFramework.csproj b/sdk/test/Services/Neptunedata/UnitTests/AWSSDK.UnitTests.Neptunedata.NetFramework.csproj
index 22b898d3ab66..fc7f3c5a5557 100644
--- a/sdk/test/Services/Neptunedata/UnitTests/AWSSDK.UnitTests.Neptunedata.NetFramework.csproj
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@@ -1,7 +1,7 @@
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@@ -19,6 +19,7 @@
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+    <LangVersion>9.0</LangVersion>
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diff --git a/sdk/test/Services/NetworkFirewall/UnitTests/AWSSDK.UnitTests.NetworkFirewall.NetFramework.csproj b/sdk/test/Services/NetworkFirewall/UnitTests/AWSSDK.UnitTests.NetworkFirewall.NetFramework.csproj
index 5945ec56bceb..2875a0544953 100644
--- a/sdk/test/Services/NetworkFirewall/UnitTests/AWSSDK.UnitTests.NetworkFirewall.NetFramework.csproj
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@@ -1,7 +1,7 @@
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@@ -19,6 +19,7 @@
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+    <LangVersion>9.0</LangVersion>
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diff --git a/sdk/test/Services/NetworkManager/UnitTests/AWSSDK.UnitTests.NetworkManager.NetFramework.csproj b/sdk/test/Services/NetworkManager/UnitTests/AWSSDK.UnitTests.NetworkManager.NetFramework.csproj
index 88ed30cfd5d3..59437c7cab82 100644
--- a/sdk/test/Services/NetworkManager/UnitTests/AWSSDK.UnitTests.NetworkManager.NetFramework.csproj
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@@ -1,7 +1,7 @@
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@@ -19,6 +19,7 @@
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+    <LangVersion>9.0</LangVersion>
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diff --git a/sdk/test/Services/NetworkMonitor/UnitTests/AWSSDK.UnitTests.NetworkMonitor.NetFramework.csproj b/sdk/test/Services/NetworkMonitor/UnitTests/AWSSDK.UnitTests.NetworkMonitor.NetFramework.csproj
index 17343ba6e77f..50c551703fef 100644
--- a/sdk/test/Services/NetworkMonitor/UnitTests/AWSSDK.UnitTests.NetworkMonitor.NetFramework.csproj
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+    <LangVersion>9.0</LangVersion>
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diff --git a/sdk/test/Services/NimbleStudio/UnitTests/AWSSDK.UnitTests.NimbleStudio.NetFramework.csproj b/sdk/test/Services/NimbleStudio/UnitTests/AWSSDK.UnitTests.NimbleStudio.NetFramework.csproj
index aef13e29e754..9585b105cb64 100644
--- a/sdk/test/Services/NimbleStudio/UnitTests/AWSSDK.UnitTests.NimbleStudio.NetFramework.csproj
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@@ -19,6 +19,7 @@
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+    <LangVersion>9.0</LangVersion>
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diff --git a/sdk/test/Services/OAM/UnitTests/AWSSDK.UnitTests.OAM.NetFramework.csproj b/sdk/test/Services/OAM/UnitTests/AWSSDK.UnitTests.OAM.NetFramework.csproj
index 2149b1b8e6f6..9578333c4e1d 100644
--- a/sdk/test/Services/OAM/UnitTests/AWSSDK.UnitTests.OAM.NetFramework.csproj
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@@ -1,7 +1,7 @@
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@@ -19,6 +19,7 @@
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+    <LangVersion>9.0</LangVersion>
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diff --git a/sdk/test/Services/OSIS/UnitTests/AWSSDK.UnitTests.OSIS.NetFramework.csproj b/sdk/test/Services/OSIS/UnitTests/AWSSDK.UnitTests.OSIS.NetFramework.csproj
index f6faa070762d..527c2097c7a4 100644
--- a/sdk/test/Services/OSIS/UnitTests/AWSSDK.UnitTests.OSIS.NetFramework.csproj
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@@ -1,7 +1,7 @@
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@@ -19,6 +19,7 @@
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+    <LangVersion>9.0</LangVersion>
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diff --git a/sdk/test/Services/Omics/UnitTests/AWSSDK.UnitTests.Omics.NetFramework.csproj b/sdk/test/Services/Omics/UnitTests/AWSSDK.UnitTests.Omics.NetFramework.csproj
index 2c73b3bf8b85..9ba0031e79c2 100644
--- a/sdk/test/Services/Omics/UnitTests/AWSSDK.UnitTests.Omics.NetFramework.csproj
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@@ -1,7 +1,7 @@
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+    <LangVersion>9.0</LangVersion>
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diff --git a/sdk/test/Services/OpenSearchServerless/UnitTests/AWSSDK.UnitTests.OpenSearchServerless.NetFramework.csproj b/sdk/test/Services/OpenSearchServerless/UnitTests/AWSSDK.UnitTests.OpenSearchServerless.NetFramework.csproj
index 9db002b6c365..20273d2f26ed 100644
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@@ -19,6 +19,7 @@
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+    <LangVersion>9.0</LangVersion>
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diff --git a/sdk/test/Services/OpenSearchService/UnitTests/AWSSDK.UnitTests.OpenSearchService.NetFramework.csproj b/sdk/test/Services/OpenSearchService/UnitTests/AWSSDK.UnitTests.OpenSearchService.NetFramework.csproj
index 0763c5ceae76..ac15b4a0e45b 100644
--- a/sdk/test/Services/OpenSearchService/UnitTests/AWSSDK.UnitTests.OpenSearchService.NetFramework.csproj
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@@ -1,7 +1,7 @@
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@@ -19,6 +19,7 @@
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+    <LangVersion>9.0</LangVersion>
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diff --git a/sdk/test/Services/OpsWorks/IntegrationTests/AWSSDK.IntegrationTests.OpsWorks.NetFramework.csproj b/sdk/test/Services/OpsWorks/IntegrationTests/AWSSDK.IntegrationTests.OpsWorks.NetFramework.csproj
index 80af5c31614e..e4e8ba12a2cc 100644
--- a/sdk/test/Services/OpsWorks/IntegrationTests/AWSSDK.IntegrationTests.OpsWorks.NetFramework.csproj
+++ b/sdk/test/Services/OpsWorks/IntegrationTests/AWSSDK.IntegrationTests.OpsWorks.NetFramework.csproj
@@ -1,6 +1,6 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);DEBUG;TRACE;BCL;ASYNC_AWAIT;LOCAL_FILE</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>false</GenerateDocumentationFile>
diff --git a/sdk/test/Services/OpsWorks/UnitTests/AWSSDK.UnitTests.OpsWorks.NetFramework.csproj b/sdk/test/Services/OpsWorks/UnitTests/AWSSDK.UnitTests.OpsWorks.NetFramework.csproj
index d9b0cedc21d0..c8c22bcbca01 100644
--- a/sdk/test/Services/OpsWorks/UnitTests/AWSSDK.UnitTests.OpsWorks.NetFramework.csproj
+++ b/sdk/test/Services/OpsWorks/UnitTests/AWSSDK.UnitTests.OpsWorks.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);TRACE;BCL;ASYNC_AWAIT;DEBUG</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CS1591,CS0612,CS0618</NoWarn>
   </PropertyGroup>
   <ItemGroup>
diff --git a/sdk/test/Services/OpsWorksCM/UnitTests/AWSSDK.UnitTests.OpsWorksCM.NetFramework.csproj b/sdk/test/Services/OpsWorksCM/UnitTests/AWSSDK.UnitTests.OpsWorksCM.NetFramework.csproj
index 6d6316e6742f..9ddeb84c2e2e 100644
--- a/sdk/test/Services/OpsWorksCM/UnitTests/AWSSDK.UnitTests.OpsWorksCM.NetFramework.csproj
+++ b/sdk/test/Services/OpsWorksCM/UnitTests/AWSSDK.UnitTests.OpsWorksCM.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);TRACE;BCL;ASYNC_AWAIT;DEBUG</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CS1591,CS0612,CS0618</NoWarn>
   </PropertyGroup>
   <ItemGroup>
diff --git a/sdk/test/Services/Organizations/UnitTests/AWSSDK.UnitTests.Organizations.NetFramework.csproj b/sdk/test/Services/Organizations/UnitTests/AWSSDK.UnitTests.Organizations.NetFramework.csproj
index 479b78721231..96362fcc3c7c 100644
--- a/sdk/test/Services/Organizations/UnitTests/AWSSDK.UnitTests.Organizations.NetFramework.csproj
+++ b/sdk/test/Services/Organizations/UnitTests/AWSSDK.UnitTests.Organizations.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);TRACE;BCL;ASYNC_AWAIT;DEBUG</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CS1591,CS0612,CS0618</NoWarn>
   </PropertyGroup>
   <ItemGroup>
diff --git a/sdk/test/Services/Outposts/UnitTests/AWSSDK.UnitTests.Outposts.NetFramework.csproj b/sdk/test/Services/Outposts/UnitTests/AWSSDK.UnitTests.Outposts.NetFramework.csproj
index 5027e7e00b02..adcc7817142d 100644
--- a/sdk/test/Services/Outposts/UnitTests/AWSSDK.UnitTests.Outposts.NetFramework.csproj
+++ b/sdk/test/Services/Outposts/UnitTests/AWSSDK.UnitTests.Outposts.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);TRACE;BCL;ASYNC_AWAIT;DEBUG</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CS1591,CS0612,CS0618</NoWarn>
   </PropertyGroup>
   <ItemGroup>
diff --git a/sdk/test/Services/PI/UnitTests/AWSSDK.UnitTests.PI.NetFramework.csproj b/sdk/test/Services/PI/UnitTests/AWSSDK.UnitTests.PI.NetFramework.csproj
index bcf8b7ac7c25..b1d3bad30cb5 100644
--- a/sdk/test/Services/PI/UnitTests/AWSSDK.UnitTests.PI.NetFramework.csproj
+++ b/sdk/test/Services/PI/UnitTests/AWSSDK.UnitTests.PI.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);TRACE;BCL;ASYNC_AWAIT;DEBUG</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CS1591,CS0612,CS0618</NoWarn>
   </PropertyGroup>
   <ItemGroup>
diff --git a/sdk/test/Services/PaginatorsTest/AWSSDK.PaginatorsTest.NetFramework.csproj b/sdk/test/Services/PaginatorsTest/AWSSDK.PaginatorsTest.NetFramework.csproj
index 5224ba7b28dc..0e0dc488dda0 100644
--- a/sdk/test/Services/PaginatorsTest/AWSSDK.PaginatorsTest.NetFramework.csproj
+++ b/sdk/test/Services/PaginatorsTest/AWSSDK.PaginatorsTest.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);BCL;AWS_ASYNC_API;CODE_ANALYSIS</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(RuleSetFileForBuild)' == 'false' Or '$(RuleSetFileForBuild)' == '' ">
diff --git a/sdk/test/Services/PaginatorsTest/AWSSDK.PaginatorsTest.NetStandard.csproj b/sdk/test/Services/PaginatorsTest/AWSSDK.PaginatorsTest.NetStandard.csproj
index eb7b70b119f6..2f607455fb56 100644
--- a/sdk/test/Services/PaginatorsTest/AWSSDK.PaginatorsTest.NetStandard.csproj
+++ b/sdk/test/Services/PaginatorsTest/AWSSDK.PaginatorsTest.NetStandard.csproj
@@ -22,6 +22,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <!-- Async Enumerable Compatibility -->
diff --git a/sdk/test/Services/PaginatorsTest/Generated/AmazonPaginatorsTestConfig.cs b/sdk/test/Services/PaginatorsTest/Generated/AmazonPaginatorsTestConfig.cs
index 1c7abb7371ce..402d2bb33e84 100644
--- a/sdk/test/Services/PaginatorsTest/Generated/AmazonPaginatorsTestConfig.cs
+++ b/sdk/test/Services/PaginatorsTest/Generated/AmazonPaginatorsTestConfig.cs
@@ -34,7 +34,7 @@ namespace Amazon.PaginatorsTest
     public partial class AmazonPaginatorsTestConfig : ClientConfig
     {
         private static readonly string UserAgentString =
-            InternalSDKUtils.BuildUserAgentString("Paginators-Test", "3.3");
+            InternalSDKUtils.BuildUserAgentString("Paginators-Test", "4.0");
 
 
         private string _userAgent = UserAgentString;
diff --git a/sdk/test/Services/PaginatorsTest/Properties/AssemblyInfo.cs b/sdk/test/Services/PaginatorsTest/Properties/AssemblyInfo.cs
index 5a03e3dbe38e..ecf1d76a3504 100644
--- a/sdk/test/Services/PaginatorsTest/Properties/AssemblyInfo.cs
+++ b/sdk/test/Services/PaginatorsTest/Properties/AssemblyInfo.cs
@@ -41,5 +41,9 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.3")]
\ No newline at end of file
+#if BCL
+[assembly: AssemblyVersion("4.0")]
+#else
+[assembly: AssemblyVersion("4.0")]
+#endif
+[assembly: AssemblyFileVersion("4.0")]
\ No newline at end of file
diff --git a/sdk/test/Services/PaginatorsTest/UnitTests/AWSSDK.UnitTests.PaginatorsTest.NetFramework.csproj b/sdk/test/Services/PaginatorsTest/UnitTests/AWSSDK.UnitTests.PaginatorsTest.NetFramework.csproj
index 33096225e4c4..10217193102a 100644
--- a/sdk/test/Services/PaginatorsTest/UnitTests/AWSSDK.UnitTests.PaginatorsTest.NetFramework.csproj
+++ b/sdk/test/Services/PaginatorsTest/UnitTests/AWSSDK.UnitTests.PaginatorsTest.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);TRACE;BCL;ASYNC_AWAIT;DEBUG</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CS1591,CS0612,CS0618</NoWarn>
   </PropertyGroup>
   <ItemGroup>
diff --git a/sdk/test/Services/Panorama/UnitTests/AWSSDK.UnitTests.Panorama.NetFramework.csproj b/sdk/test/Services/Panorama/UnitTests/AWSSDK.UnitTests.Panorama.NetFramework.csproj
index d97ce4b737b1..0158c11e9d8c 100644
--- a/sdk/test/Services/Panorama/UnitTests/AWSSDK.UnitTests.Panorama.NetFramework.csproj
+++ b/sdk/test/Services/Panorama/UnitTests/AWSSDK.UnitTests.Panorama.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);TRACE;BCL;ASYNC_AWAIT;DEBUG</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CS1591,CS0612,CS0618</NoWarn>
   </PropertyGroup>
   <ItemGroup>
diff --git a/sdk/test/Services/PaymentCryptography/UnitTests/AWSSDK.UnitTests.PaymentCryptography.NetFramework.csproj b/sdk/test/Services/PaymentCryptography/UnitTests/AWSSDK.UnitTests.PaymentCryptography.NetFramework.csproj
index c7091c7261c1..800c2e86ddfb 100644
--- a/sdk/test/Services/PaymentCryptography/UnitTests/AWSSDK.UnitTests.PaymentCryptography.NetFramework.csproj
+++ b/sdk/test/Services/PaymentCryptography/UnitTests/AWSSDK.UnitTests.PaymentCryptography.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);TRACE;BCL;ASYNC_AWAIT;DEBUG</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CS1591,CS0612,CS0618</NoWarn>
   </PropertyGroup>
   <ItemGroup>
diff --git a/sdk/test/Services/PaymentCryptographyData/UnitTests/AWSSDK.UnitTests.PaymentCryptographyData.NetFramework.csproj b/sdk/test/Services/PaymentCryptographyData/UnitTests/AWSSDK.UnitTests.PaymentCryptographyData.NetFramework.csproj
index 7b8c5c67a484..c1e8145f6426 100644
--- a/sdk/test/Services/PaymentCryptographyData/UnitTests/AWSSDK.UnitTests.PaymentCryptographyData.NetFramework.csproj
+++ b/sdk/test/Services/PaymentCryptographyData/UnitTests/AWSSDK.UnitTests.PaymentCryptographyData.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);TRACE;BCL;ASYNC_AWAIT;DEBUG</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CS1591,CS0612,CS0618</NoWarn>
   </PropertyGroup>
   <ItemGroup>
diff --git a/sdk/test/Services/PcaConnectorAd/UnitTests/AWSSDK.UnitTests.PcaConnectorAd.NetFramework.csproj b/sdk/test/Services/PcaConnectorAd/UnitTests/AWSSDK.UnitTests.PcaConnectorAd.NetFramework.csproj
index d0cf50e8a4ab..5ebd47d90fe8 100644
--- a/sdk/test/Services/PcaConnectorAd/UnitTests/AWSSDK.UnitTests.PcaConnectorAd.NetFramework.csproj
+++ b/sdk/test/Services/PcaConnectorAd/UnitTests/AWSSDK.UnitTests.PcaConnectorAd.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);TRACE;BCL;ASYNC_AWAIT;DEBUG</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CS1591,CS0612,CS0618</NoWarn>
   </PropertyGroup>
   <ItemGroup>
diff --git a/sdk/test/Services/Personalize/UnitTests/AWSSDK.UnitTests.Personalize.NetFramework.csproj b/sdk/test/Services/Personalize/UnitTests/AWSSDK.UnitTests.Personalize.NetFramework.csproj
index 4721b862b700..3aa43ad31430 100644
--- a/sdk/test/Services/Personalize/UnitTests/AWSSDK.UnitTests.Personalize.NetFramework.csproj
+++ b/sdk/test/Services/Personalize/UnitTests/AWSSDK.UnitTests.Personalize.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);TRACE;BCL;ASYNC_AWAIT;DEBUG</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CS1591,CS0612,CS0618</NoWarn>
   </PropertyGroup>
   <ItemGroup>
diff --git a/sdk/test/Services/PersonalizeEvents/UnitTests/AWSSDK.UnitTests.PersonalizeEvents.NetFramework.csproj b/sdk/test/Services/PersonalizeEvents/UnitTests/AWSSDK.UnitTests.PersonalizeEvents.NetFramework.csproj
index 4f096a786e8a..8f6c8bc4fc27 100644
--- a/sdk/test/Services/PersonalizeEvents/UnitTests/AWSSDK.UnitTests.PersonalizeEvents.NetFramework.csproj
+++ b/sdk/test/Services/PersonalizeEvents/UnitTests/AWSSDK.UnitTests.PersonalizeEvents.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);TRACE;BCL;ASYNC_AWAIT;DEBUG</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CS1591,CS0612,CS0618</NoWarn>
   </PropertyGroup>
   <ItemGroup>
diff --git a/sdk/test/Services/PersonalizeRuntime/UnitTests/AWSSDK.UnitTests.PersonalizeRuntime.NetFramework.csproj b/sdk/test/Services/PersonalizeRuntime/UnitTests/AWSSDK.UnitTests.PersonalizeRuntime.NetFramework.csproj
index afc078cfc9ed..b86a77903bdc 100644
--- a/sdk/test/Services/PersonalizeRuntime/UnitTests/AWSSDK.UnitTests.PersonalizeRuntime.NetFramework.csproj
+++ b/sdk/test/Services/PersonalizeRuntime/UnitTests/AWSSDK.UnitTests.PersonalizeRuntime.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);TRACE;BCL;ASYNC_AWAIT;DEBUG</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CS1591,CS0612,CS0618</NoWarn>
   </PropertyGroup>
   <ItemGroup>
diff --git a/sdk/test/Services/Pinpoint/UnitTests/AWSSDK.UnitTests.Pinpoint.NetFramework.csproj b/sdk/test/Services/Pinpoint/UnitTests/AWSSDK.UnitTests.Pinpoint.NetFramework.csproj
index 224e6f26d821..b9e4ca8f522f 100644
--- a/sdk/test/Services/Pinpoint/UnitTests/AWSSDK.UnitTests.Pinpoint.NetFramework.csproj
+++ b/sdk/test/Services/Pinpoint/UnitTests/AWSSDK.UnitTests.Pinpoint.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);TRACE;BCL;ASYNC_AWAIT;DEBUG</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CS1591,CS0612,CS0618</NoWarn>
   </PropertyGroup>
   <ItemGroup>
diff --git a/sdk/test/Services/PinpointEmail/UnitTests/AWSSDK.UnitTests.PinpointEmail.NetFramework.csproj b/sdk/test/Services/PinpointEmail/UnitTests/AWSSDK.UnitTests.PinpointEmail.NetFramework.csproj
index 853b19c18b54..4c97dd2a34a8 100644
--- a/sdk/test/Services/PinpointEmail/UnitTests/AWSSDK.UnitTests.PinpointEmail.NetFramework.csproj
+++ b/sdk/test/Services/PinpointEmail/UnitTests/AWSSDK.UnitTests.PinpointEmail.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);TRACE;BCL;ASYNC_AWAIT;DEBUG</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CS1591,CS0612,CS0618</NoWarn>
   </PropertyGroup>
   <ItemGroup>
diff --git a/sdk/test/Services/PinpointSMSVoice/UnitTests/AWSSDK.UnitTests.PinpointSMSVoice.NetFramework.csproj b/sdk/test/Services/PinpointSMSVoice/UnitTests/AWSSDK.UnitTests.PinpointSMSVoice.NetFramework.csproj
index 9f8131daf670..3f39891a99d2 100644
--- a/sdk/test/Services/PinpointSMSVoice/UnitTests/AWSSDK.UnitTests.PinpointSMSVoice.NetFramework.csproj
+++ b/sdk/test/Services/PinpointSMSVoice/UnitTests/AWSSDK.UnitTests.PinpointSMSVoice.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);TRACE;BCL;ASYNC_AWAIT;DEBUG</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CS1591,CS0612,CS0618</NoWarn>
   </PropertyGroup>
   <ItemGroup>
diff --git a/sdk/test/Services/PinpointSMSVoiceV2/UnitTests/AWSSDK.UnitTests.PinpointSMSVoiceV2.NetFramework.csproj b/sdk/test/Services/PinpointSMSVoiceV2/UnitTests/AWSSDK.UnitTests.PinpointSMSVoiceV2.NetFramework.csproj
index 638752aaf19c..3674b028103c 100644
--- a/sdk/test/Services/PinpointSMSVoiceV2/UnitTests/AWSSDK.UnitTests.PinpointSMSVoiceV2.NetFramework.csproj
+++ b/sdk/test/Services/PinpointSMSVoiceV2/UnitTests/AWSSDK.UnitTests.PinpointSMSVoiceV2.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);TRACE;BCL;ASYNC_AWAIT;DEBUG</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CS1591,CS0612,CS0618</NoWarn>
   </PropertyGroup>
   <ItemGroup>
diff --git a/sdk/test/Services/Pipes/UnitTests/AWSSDK.UnitTests.Pipes.NetFramework.csproj b/sdk/test/Services/Pipes/UnitTests/AWSSDK.UnitTests.Pipes.NetFramework.csproj
index 7853e50884b4..d5f6e3935ee9 100644
--- a/sdk/test/Services/Pipes/UnitTests/AWSSDK.UnitTests.Pipes.NetFramework.csproj
+++ b/sdk/test/Services/Pipes/UnitTests/AWSSDK.UnitTests.Pipes.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);TRACE;BCL;ASYNC_AWAIT;DEBUG</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CS1591,CS0612,CS0618</NoWarn>
   </PropertyGroup>
   <ItemGroup>
diff --git a/sdk/test/Services/Polly/IntegrationTests/AWSSDK.IntegrationTests.Polly.NetFramework.csproj b/sdk/test/Services/Polly/IntegrationTests/AWSSDK.IntegrationTests.Polly.NetFramework.csproj
index 9842c191c073..ecda4824e70c 100644
--- a/sdk/test/Services/Polly/IntegrationTests/AWSSDK.IntegrationTests.Polly.NetFramework.csproj
+++ b/sdk/test/Services/Polly/IntegrationTests/AWSSDK.IntegrationTests.Polly.NetFramework.csproj
@@ -1,6 +1,6 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);DEBUG;TRACE;BCL;ASYNC_AWAIT;LOCAL_FILE</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>false</GenerateDocumentationFile>
diff --git a/sdk/test/Services/Polly/UnitTests/AWSSDK.UnitTests.Polly.NetFramework.csproj b/sdk/test/Services/Polly/UnitTests/AWSSDK.UnitTests.Polly.NetFramework.csproj
index 5ecb0ac865f3..eb90e9c3b98b 100644
--- a/sdk/test/Services/Polly/UnitTests/AWSSDK.UnitTests.Polly.NetFramework.csproj
+++ b/sdk/test/Services/Polly/UnitTests/AWSSDK.UnitTests.Polly.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);TRACE;BCL;ASYNC_AWAIT;DEBUG</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CS1591,CS0612,CS0618</NoWarn>
   </PropertyGroup>
   <ItemGroup>
diff --git a/sdk/test/Services/Pricing/UnitTests/AWSSDK.UnitTests.Pricing.NetFramework.csproj b/sdk/test/Services/Pricing/UnitTests/AWSSDK.UnitTests.Pricing.NetFramework.csproj
index 6195817b5b94..51c4e6b912cc 100644
--- a/sdk/test/Services/Pricing/UnitTests/AWSSDK.UnitTests.Pricing.NetFramework.csproj
+++ b/sdk/test/Services/Pricing/UnitTests/AWSSDK.UnitTests.Pricing.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);TRACE;BCL;ASYNC_AWAIT;DEBUG</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CS1591,CS0612,CS0618</NoWarn>
   </PropertyGroup>
   <ItemGroup>
diff --git a/sdk/test/Services/Private5G/UnitTests/AWSSDK.UnitTests.Private5G.NetFramework.csproj b/sdk/test/Services/Private5G/UnitTests/AWSSDK.UnitTests.Private5G.NetFramework.csproj
index 291569ec5ad2..c9b6b1b93cd5 100644
--- a/sdk/test/Services/Private5G/UnitTests/AWSSDK.UnitTests.Private5G.NetFramework.csproj
+++ b/sdk/test/Services/Private5G/UnitTests/AWSSDK.UnitTests.Private5G.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);TRACE;BCL;ASYNC_AWAIT;DEBUG</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CS1591,CS0612,CS0618</NoWarn>
   </PropertyGroup>
   <ItemGroup>
diff --git a/sdk/test/Services/PrometheusService/UnitTests/AWSSDK.UnitTests.PrometheusService.NetFramework.csproj b/sdk/test/Services/PrometheusService/UnitTests/AWSSDK.UnitTests.PrometheusService.NetFramework.csproj
index 219e4fddfcb5..698a1eecb1aa 100644
--- a/sdk/test/Services/PrometheusService/UnitTests/AWSSDK.UnitTests.PrometheusService.NetFramework.csproj
+++ b/sdk/test/Services/PrometheusService/UnitTests/AWSSDK.UnitTests.PrometheusService.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);TRACE;BCL;ASYNC_AWAIT;DEBUG</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CS1591,CS0612,CS0618</NoWarn>
   </PropertyGroup>
   <ItemGroup>
diff --git a/sdk/test/Services/Proton/UnitTests/AWSSDK.UnitTests.Proton.NetFramework.csproj b/sdk/test/Services/Proton/UnitTests/AWSSDK.UnitTests.Proton.NetFramework.csproj
index 8166a50893ae..8aac8b8e8361 100644
--- a/sdk/test/Services/Proton/UnitTests/AWSSDK.UnitTests.Proton.NetFramework.csproj
+++ b/sdk/test/Services/Proton/UnitTests/AWSSDK.UnitTests.Proton.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);TRACE;BCL;ASYNC_AWAIT;DEBUG</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CS1591,CS0612,CS0618</NoWarn>
   </PropertyGroup>
   <ItemGroup>
diff --git a/sdk/test/Services/QBusiness/UnitTests/AWSSDK.UnitTests.QBusiness.NetFramework.csproj b/sdk/test/Services/QBusiness/UnitTests/AWSSDK.UnitTests.QBusiness.NetFramework.csproj
index e738a282d4ad..f9de9f9e21ad 100644
--- a/sdk/test/Services/QBusiness/UnitTests/AWSSDK.UnitTests.QBusiness.NetFramework.csproj
+++ b/sdk/test/Services/QBusiness/UnitTests/AWSSDK.UnitTests.QBusiness.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);TRACE;BCL;ASYNC_AWAIT;DEBUG</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CS1591,CS0612,CS0618</NoWarn>
   </PropertyGroup>
   <ItemGroup>
diff --git a/sdk/test/Services/QConnect/UnitTests/AWSSDK.UnitTests.QConnect.NetFramework.csproj b/sdk/test/Services/QConnect/UnitTests/AWSSDK.UnitTests.QConnect.NetFramework.csproj
index 33773b9525dd..c724220cf9aa 100644
--- a/sdk/test/Services/QConnect/UnitTests/AWSSDK.UnitTests.QConnect.NetFramework.csproj
+++ b/sdk/test/Services/QConnect/UnitTests/AWSSDK.UnitTests.QConnect.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);TRACE;BCL;ASYNC_AWAIT;DEBUG</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CS1591,CS0612,CS0618</NoWarn>
   </PropertyGroup>
   <ItemGroup>
diff --git a/sdk/test/Services/QLDB/UnitTests/AWSSDK.UnitTests.QLDB.NetFramework.csproj b/sdk/test/Services/QLDB/UnitTests/AWSSDK.UnitTests.QLDB.NetFramework.csproj
index 5e8bf362566b..b3a855b91a0f 100644
--- a/sdk/test/Services/QLDB/UnitTests/AWSSDK.UnitTests.QLDB.NetFramework.csproj
+++ b/sdk/test/Services/QLDB/UnitTests/AWSSDK.UnitTests.QLDB.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);TRACE;BCL;ASYNC_AWAIT;DEBUG</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CS1591,CS0612,CS0618</NoWarn>
   </PropertyGroup>
   <ItemGroup>
diff --git a/sdk/test/Services/QLDBSession/UnitTests/AWSSDK.UnitTests.QLDBSession.NetFramework.csproj b/sdk/test/Services/QLDBSession/UnitTests/AWSSDK.UnitTests.QLDBSession.NetFramework.csproj
index 3f6de2e47818..cb4ac5337759 100644
--- a/sdk/test/Services/QLDBSession/UnitTests/AWSSDK.UnitTests.QLDBSession.NetFramework.csproj
+++ b/sdk/test/Services/QLDBSession/UnitTests/AWSSDK.UnitTests.QLDBSession.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);TRACE;BCL;ASYNC_AWAIT;DEBUG</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CS1591,CS0612,CS0618</NoWarn>
   </PropertyGroup>
   <ItemGroup>
diff --git a/sdk/test/Services/QueryCompatible/AWSSDK.QueryCompatible.NetFramework.csproj b/sdk/test/Services/QueryCompatible/AWSSDK.QueryCompatible.NetFramework.csproj
index 51632f403f82..680473f1c8fa 100644
--- a/sdk/test/Services/QueryCompatible/AWSSDK.QueryCompatible.NetFramework.csproj
+++ b/sdk/test/Services/QueryCompatible/AWSSDK.QueryCompatible.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);BCL;AWS_ASYNC_API;CODE_ANALYSIS</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(RuleSetFileForBuild)' == 'false' Or '$(RuleSetFileForBuild)' == '' ">
diff --git a/sdk/test/Services/QueryCompatible/AWSSDK.QueryCompatible.NetStandard.csproj b/sdk/test/Services/QueryCompatible/AWSSDK.QueryCompatible.NetStandard.csproj
index e010f1a1bd5f..076772d2daeb 100644
--- a/sdk/test/Services/QueryCompatible/AWSSDK.QueryCompatible.NetStandard.csproj
+++ b/sdk/test/Services/QueryCompatible/AWSSDK.QueryCompatible.NetStandard.csproj
@@ -22,6 +22,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <!-- Async Enumerable Compatibility -->
diff --git a/sdk/test/Services/QueryCompatible/Generated/AmazonQueryCompatibleConfig.cs b/sdk/test/Services/QueryCompatible/Generated/AmazonQueryCompatibleConfig.cs
index 34edb452251d..1020e97ebb84 100644
--- a/sdk/test/Services/QueryCompatible/Generated/AmazonQueryCompatibleConfig.cs
+++ b/sdk/test/Services/QueryCompatible/Generated/AmazonQueryCompatibleConfig.cs
@@ -34,7 +34,7 @@ namespace Amazon.QueryCompatible
     public partial class AmazonQueryCompatibleConfig : ClientConfig
     {
         private static readonly string UserAgentString =
-            InternalSDKUtils.BuildUserAgentString("AWSQueryCompatible", "3.3");
+            InternalSDKUtils.BuildUserAgentString("AWSQueryCompatible", "4.0");
 
 
         private string _userAgent = UserAgentString;
diff --git a/sdk/test/Services/QueryCompatible/Properties/AssemblyInfo.cs b/sdk/test/Services/QueryCompatible/Properties/AssemblyInfo.cs
index 4b33ae1103e2..f5bd2dbc26cc 100644
--- a/sdk/test/Services/QueryCompatible/Properties/AssemblyInfo.cs
+++ b/sdk/test/Services/QueryCompatible/Properties/AssemblyInfo.cs
@@ -41,5 +41,9 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.3")]
\ No newline at end of file
+#if BCL
+[assembly: AssemblyVersion("4.0")]
+#else
+[assembly: AssemblyVersion("4.0")]
+#endif
+[assembly: AssemblyFileVersion("4.0")]
\ No newline at end of file
diff --git a/sdk/test/Services/QueryCompatible/UnitTests/AWSSDK.UnitTests.QueryCompatible.NetFramework.csproj b/sdk/test/Services/QueryCompatible/UnitTests/AWSSDK.UnitTests.QueryCompatible.NetFramework.csproj
index e28934c5471f..c5186238b9b2 100644
--- a/sdk/test/Services/QueryCompatible/UnitTests/AWSSDK.UnitTests.QueryCompatible.NetFramework.csproj
+++ b/sdk/test/Services/QueryCompatible/UnitTests/AWSSDK.UnitTests.QueryCompatible.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);TRACE;BCL;ASYNC_AWAIT;DEBUG</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CS1591,CS0612,CS0618</NoWarn>
   </PropertyGroup>
   <ItemGroup>
diff --git a/sdk/test/Services/QueryProtocol/AWSSDK.QueryProtocol.NetFramework.csproj b/sdk/test/Services/QueryProtocol/AWSSDK.QueryProtocol.NetFramework.csproj
index 0ad2a7cb1bba..027adbf56f20 100644
--- a/sdk/test/Services/QueryProtocol/AWSSDK.QueryProtocol.NetFramework.csproj
+++ b/sdk/test/Services/QueryProtocol/AWSSDK.QueryProtocol.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);BCL;AWS_ASYNC_API;CODE_ANALYSIS</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(RuleSetFileForBuild)' == 'false' Or '$(RuleSetFileForBuild)' == '' ">
diff --git a/sdk/test/Services/QueryProtocol/AWSSDK.QueryProtocol.NetStandard.csproj b/sdk/test/Services/QueryProtocol/AWSSDK.QueryProtocol.NetStandard.csproj
index 5a6cab8f2d17..75b25233ac1b 100644
--- a/sdk/test/Services/QueryProtocol/AWSSDK.QueryProtocol.NetStandard.csproj
+++ b/sdk/test/Services/QueryProtocol/AWSSDK.QueryProtocol.NetStandard.csproj
@@ -22,6 +22,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <!-- Async Enumerable Compatibility -->
diff --git a/sdk/test/Services/QueryProtocol/Generated/AmazonQueryProtocolConfig.cs b/sdk/test/Services/QueryProtocol/Generated/AmazonQueryProtocolConfig.cs
index 6be071d5f5cc..37ed36c07878 100644
--- a/sdk/test/Services/QueryProtocol/Generated/AmazonQueryProtocolConfig.cs
+++ b/sdk/test/Services/QueryProtocol/Generated/AmazonQueryProtocolConfig.cs
@@ -34,7 +34,7 @@ namespace Amazon.QueryProtocol
     public partial class AmazonQueryProtocolConfig : ClientConfig
     {
         private static readonly string UserAgentString =
-            InternalSDKUtils.BuildUserAgentString("Query Protocol", "3.3");
+            InternalSDKUtils.BuildUserAgentString("Query Protocol", "4.0");
 
 
         private string _userAgent = UserAgentString;
diff --git a/sdk/test/Services/QueryProtocol/Properties/AssemblyInfo.cs b/sdk/test/Services/QueryProtocol/Properties/AssemblyInfo.cs
index 80aed250fa20..f500f8a91e08 100644
--- a/sdk/test/Services/QueryProtocol/Properties/AssemblyInfo.cs
+++ b/sdk/test/Services/QueryProtocol/Properties/AssemblyInfo.cs
@@ -41,5 +41,9 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.3")]
\ No newline at end of file
+#if BCL
+[assembly: AssemblyVersion("4.0")]
+#else
+[assembly: AssemblyVersion("4.0")]
+#endif
+[assembly: AssemblyFileVersion("4.0")]
\ No newline at end of file
diff --git a/sdk/test/Services/QueryProtocol/UnitTests/AWSSDK.UnitTests.QueryProtocol.NetFramework.csproj b/sdk/test/Services/QueryProtocol/UnitTests/AWSSDK.UnitTests.QueryProtocol.NetFramework.csproj
index 3a04ea1d62d5..c70c3154c827 100644
--- a/sdk/test/Services/QueryProtocol/UnitTests/AWSSDK.UnitTests.QueryProtocol.NetFramework.csproj
+++ b/sdk/test/Services/QueryProtocol/UnitTests/AWSSDK.UnitTests.QueryProtocol.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);TRACE;BCL;ASYNC_AWAIT;DEBUG</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CS1591,CS0612,CS0618</NoWarn>
   </PropertyGroup>
   <ItemGroup>
diff --git a/sdk/test/Services/QuickSight/UnitTests/AWSSDK.UnitTests.QuickSight.NetFramework.csproj b/sdk/test/Services/QuickSight/UnitTests/AWSSDK.UnitTests.QuickSight.NetFramework.csproj
index b5b4d861e7e6..6e7435b43ad5 100644
--- a/sdk/test/Services/QuickSight/UnitTests/AWSSDK.UnitTests.QuickSight.NetFramework.csproj
+++ b/sdk/test/Services/QuickSight/UnitTests/AWSSDK.UnitTests.QuickSight.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);TRACE;BCL;ASYNC_AWAIT;DEBUG</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CS1591,CS0612,CS0618</NoWarn>
   </PropertyGroup>
   <ItemGroup>
diff --git a/sdk/test/Services/RAM/UnitTests/AWSSDK.UnitTests.RAM.NetFramework.csproj b/sdk/test/Services/RAM/UnitTests/AWSSDK.UnitTests.RAM.NetFramework.csproj
index 0aedcc9fabe5..8e19d8fcf731 100644
--- a/sdk/test/Services/RAM/UnitTests/AWSSDK.UnitTests.RAM.NetFramework.csproj
+++ b/sdk/test/Services/RAM/UnitTests/AWSSDK.UnitTests.RAM.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);TRACE;BCL;ASYNC_AWAIT;DEBUG</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CS1591,CS0612,CS0618</NoWarn>
   </PropertyGroup>
   <ItemGroup>
diff --git a/sdk/test/Services/RDS/IntegrationTests/AWSSDK.IntegrationTests.RDS.NetFramework.csproj b/sdk/test/Services/RDS/IntegrationTests/AWSSDK.IntegrationTests.RDS.NetFramework.csproj
index 0ce45732ef91..584c9a8e219f 100644
--- a/sdk/test/Services/RDS/IntegrationTests/AWSSDK.IntegrationTests.RDS.NetFramework.csproj
+++ b/sdk/test/Services/RDS/IntegrationTests/AWSSDK.IntegrationTests.RDS.NetFramework.csproj
@@ -1,6 +1,6 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);DEBUG;TRACE;BCL;ASYNC_AWAIT;LOCAL_FILE</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>false</GenerateDocumentationFile>
diff --git a/sdk/test/Services/RDS/UnitTests/AWSSDK.UnitTests.RDS.NetFramework.csproj b/sdk/test/Services/RDS/UnitTests/AWSSDK.UnitTests.RDS.NetFramework.csproj
index e913d4b3acab..f6648576c4b0 100644
--- a/sdk/test/Services/RDS/UnitTests/AWSSDK.UnitTests.RDS.NetFramework.csproj
+++ b/sdk/test/Services/RDS/UnitTests/AWSSDK.UnitTests.RDS.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);TRACE;BCL;ASYNC_AWAIT;DEBUG</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CS1591,CS0612,CS0618</NoWarn>
   </PropertyGroup>
   <ItemGroup>
diff --git a/sdk/test/Services/RDSDataService/UnitTests/AWSSDK.UnitTests.RDSDataService.NetFramework.csproj b/sdk/test/Services/RDSDataService/UnitTests/AWSSDK.UnitTests.RDSDataService.NetFramework.csproj
index e4902c72564b..2ab16870777f 100644
--- a/sdk/test/Services/RDSDataService/UnitTests/AWSSDK.UnitTests.RDSDataService.NetFramework.csproj
+++ b/sdk/test/Services/RDSDataService/UnitTests/AWSSDK.UnitTests.RDSDataService.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);TRACE;BCL;ASYNC_AWAIT;DEBUG</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CS1591,CS0612,CS0618</NoWarn>
   </PropertyGroup>
   <ItemGroup>
diff --git a/sdk/test/Services/RecycleBin/UnitTests/AWSSDK.UnitTests.RecycleBin.NetFramework.csproj b/sdk/test/Services/RecycleBin/UnitTests/AWSSDK.UnitTests.RecycleBin.NetFramework.csproj
index 2557e9668192..62e7595d0d38 100644
--- a/sdk/test/Services/RecycleBin/UnitTests/AWSSDK.UnitTests.RecycleBin.NetFramework.csproj
+++ b/sdk/test/Services/RecycleBin/UnitTests/AWSSDK.UnitTests.RecycleBin.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);TRACE;BCL;ASYNC_AWAIT;DEBUG</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CS1591,CS0612,CS0618</NoWarn>
   </PropertyGroup>
   <ItemGroup>
diff --git a/sdk/test/Services/Redshift/IntegrationTests/AWSSDK.IntegrationTests.Redshift.NetFramework.csproj b/sdk/test/Services/Redshift/IntegrationTests/AWSSDK.IntegrationTests.Redshift.NetFramework.csproj
index f72a4e40c28a..22661a6ebcb1 100644
--- a/sdk/test/Services/Redshift/IntegrationTests/AWSSDK.IntegrationTests.Redshift.NetFramework.csproj
+++ b/sdk/test/Services/Redshift/IntegrationTests/AWSSDK.IntegrationTests.Redshift.NetFramework.csproj
@@ -1,6 +1,6 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);DEBUG;TRACE;BCL;ASYNC_AWAIT;LOCAL_FILE</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>false</GenerateDocumentationFile>
diff --git a/sdk/test/Services/Redshift/UnitTests/AWSSDK.UnitTests.Redshift.NetFramework.csproj b/sdk/test/Services/Redshift/UnitTests/AWSSDK.UnitTests.Redshift.NetFramework.csproj
index fab5b26bf100..9edb679ae1d1 100644
--- a/sdk/test/Services/Redshift/UnitTests/AWSSDK.UnitTests.Redshift.NetFramework.csproj
+++ b/sdk/test/Services/Redshift/UnitTests/AWSSDK.UnitTests.Redshift.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);TRACE;BCL;ASYNC_AWAIT;DEBUG</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CS1591,CS0612,CS0618</NoWarn>
   </PropertyGroup>
   <ItemGroup>
diff --git a/sdk/test/Services/RedshiftDataAPIService/UnitTests/AWSSDK.UnitTests.RedshiftDataAPIService.NetFramework.csproj b/sdk/test/Services/RedshiftDataAPIService/UnitTests/AWSSDK.UnitTests.RedshiftDataAPIService.NetFramework.csproj
index 059232ddc0e4..10a90d84675b 100644
--- a/sdk/test/Services/RedshiftDataAPIService/UnitTests/AWSSDK.UnitTests.RedshiftDataAPIService.NetFramework.csproj
+++ b/sdk/test/Services/RedshiftDataAPIService/UnitTests/AWSSDK.UnitTests.RedshiftDataAPIService.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);TRACE;BCL;ASYNC_AWAIT;DEBUG</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CS1591,CS0612,CS0618</NoWarn>
   </PropertyGroup>
   <ItemGroup>
diff --git a/sdk/test/Services/RedshiftServerless/UnitTests/AWSSDK.UnitTests.RedshiftServerless.NetFramework.csproj b/sdk/test/Services/RedshiftServerless/UnitTests/AWSSDK.UnitTests.RedshiftServerless.NetFramework.csproj
index 91dcaf6da1c2..40b736d2f49b 100644
--- a/sdk/test/Services/RedshiftServerless/UnitTests/AWSSDK.UnitTests.RedshiftServerless.NetFramework.csproj
+++ b/sdk/test/Services/RedshiftServerless/UnitTests/AWSSDK.UnitTests.RedshiftServerless.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);TRACE;BCL;ASYNC_AWAIT;DEBUG</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CS1591,CS0612,CS0618</NoWarn>
   </PropertyGroup>
   <ItemGroup>
diff --git a/sdk/test/Services/Rekognition/UnitTests/AWSSDK.UnitTests.Rekognition.NetFramework.csproj b/sdk/test/Services/Rekognition/UnitTests/AWSSDK.UnitTests.Rekognition.NetFramework.csproj
index f408e3b6bbe1..a6fc91307f7a 100644
--- a/sdk/test/Services/Rekognition/UnitTests/AWSSDK.UnitTests.Rekognition.NetFramework.csproj
+++ b/sdk/test/Services/Rekognition/UnitTests/AWSSDK.UnitTests.Rekognition.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);TRACE;BCL;ASYNC_AWAIT;DEBUG</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CS1591,CS0612,CS0618</NoWarn>
   </PropertyGroup>
   <ItemGroup>
diff --git a/sdk/test/Services/Repostspace/UnitTests/AWSSDK.UnitTests.Repostspace.NetFramework.csproj b/sdk/test/Services/Repostspace/UnitTests/AWSSDK.UnitTests.Repostspace.NetFramework.csproj
index 924c040ad78a..b32914fe49b5 100644
--- a/sdk/test/Services/Repostspace/UnitTests/AWSSDK.UnitTests.Repostspace.NetFramework.csproj
+++ b/sdk/test/Services/Repostspace/UnitTests/AWSSDK.UnitTests.Repostspace.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);TRACE;BCL;ASYNC_AWAIT;DEBUG</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CS1591,CS0612,CS0618</NoWarn>
   </PropertyGroup>
   <ItemGroup>
diff --git a/sdk/test/Services/ResilienceHub/UnitTests/AWSSDK.UnitTests.ResilienceHub.NetFramework.csproj b/sdk/test/Services/ResilienceHub/UnitTests/AWSSDK.UnitTests.ResilienceHub.NetFramework.csproj
index 513155569191..7cd7e8805552 100644
--- a/sdk/test/Services/ResilienceHub/UnitTests/AWSSDK.UnitTests.ResilienceHub.NetFramework.csproj
+++ b/sdk/test/Services/ResilienceHub/UnitTests/AWSSDK.UnitTests.ResilienceHub.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);TRACE;BCL;ASYNC_AWAIT;DEBUG</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CS1591,CS0612,CS0618</NoWarn>
   </PropertyGroup>
   <ItemGroup>
diff --git a/sdk/test/Services/ResourceExplorer2/UnitTests/AWSSDK.UnitTests.ResourceExplorer2.NetFramework.csproj b/sdk/test/Services/ResourceExplorer2/UnitTests/AWSSDK.UnitTests.ResourceExplorer2.NetFramework.csproj
index 3cf3863b99dd..87a49e6528e3 100644
--- a/sdk/test/Services/ResourceExplorer2/UnitTests/AWSSDK.UnitTests.ResourceExplorer2.NetFramework.csproj
+++ b/sdk/test/Services/ResourceExplorer2/UnitTests/AWSSDK.UnitTests.ResourceExplorer2.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);TRACE;BCL;ASYNC_AWAIT;DEBUG</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CS1591,CS0612,CS0618</NoWarn>
   </PropertyGroup>
   <ItemGroup>
diff --git a/sdk/test/Services/ResourceGroups/UnitTests/AWSSDK.UnitTests.ResourceGroups.NetFramework.csproj b/sdk/test/Services/ResourceGroups/UnitTests/AWSSDK.UnitTests.ResourceGroups.NetFramework.csproj
index c2de796a1edc..67c9883a1983 100644
--- a/sdk/test/Services/ResourceGroups/UnitTests/AWSSDK.UnitTests.ResourceGroups.NetFramework.csproj
+++ b/sdk/test/Services/ResourceGroups/UnitTests/AWSSDK.UnitTests.ResourceGroups.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);TRACE;BCL;ASYNC_AWAIT;DEBUG</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CS1591,CS0612,CS0618</NoWarn>
   </PropertyGroup>
   <ItemGroup>
diff --git a/sdk/test/Services/ResourceGroupsTaggingAPI/UnitTests/AWSSDK.UnitTests.ResourceGroupsTaggingAPI.NetFramework.csproj b/sdk/test/Services/ResourceGroupsTaggingAPI/UnitTests/AWSSDK.UnitTests.ResourceGroupsTaggingAPI.NetFramework.csproj
index 7384a0ecb896..00a902725bd2 100644
--- a/sdk/test/Services/ResourceGroupsTaggingAPI/UnitTests/AWSSDK.UnitTests.ResourceGroupsTaggingAPI.NetFramework.csproj
+++ b/sdk/test/Services/ResourceGroupsTaggingAPI/UnitTests/AWSSDK.UnitTests.ResourceGroupsTaggingAPI.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);TRACE;BCL;ASYNC_AWAIT;DEBUG</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CS1591,CS0612,CS0618</NoWarn>
   </PropertyGroup>
   <ItemGroup>
diff --git a/sdk/test/Services/RestJsonProtocol/AWSSDK.RestJsonProtocol.NetFramework.csproj b/sdk/test/Services/RestJsonProtocol/AWSSDK.RestJsonProtocol.NetFramework.csproj
index 6d2ed3c87808..992010dc8a50 100644
--- a/sdk/test/Services/RestJsonProtocol/AWSSDK.RestJsonProtocol.NetFramework.csproj
+++ b/sdk/test/Services/RestJsonProtocol/AWSSDK.RestJsonProtocol.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);BCL;AWS_ASYNC_API;CODE_ANALYSIS</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(RuleSetFileForBuild)' == 'false' Or '$(RuleSetFileForBuild)' == '' ">
diff --git a/sdk/test/Services/RestJsonProtocol/AWSSDK.RestJsonProtocol.NetStandard.csproj b/sdk/test/Services/RestJsonProtocol/AWSSDK.RestJsonProtocol.NetStandard.csproj
index 3e50a624829e..67172349b64d 100644
--- a/sdk/test/Services/RestJsonProtocol/AWSSDK.RestJsonProtocol.NetStandard.csproj
+++ b/sdk/test/Services/RestJsonProtocol/AWSSDK.RestJsonProtocol.NetStandard.csproj
@@ -22,6 +22,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <!-- Async Enumerable Compatibility -->
diff --git a/sdk/test/Services/RestJsonProtocol/Generated/AmazonRestJsonProtocolConfig.cs b/sdk/test/Services/RestJsonProtocol/Generated/AmazonRestJsonProtocolConfig.cs
index aa17737dcdaa..3889902db107 100644
--- a/sdk/test/Services/RestJsonProtocol/Generated/AmazonRestJsonProtocolConfig.cs
+++ b/sdk/test/Services/RestJsonProtocol/Generated/AmazonRestJsonProtocolConfig.cs
@@ -34,7 +34,7 @@ namespace Amazon.RestJsonProtocol
     public partial class AmazonRestJsonProtocolConfig : ClientConfig
     {
         private static readonly string UserAgentString =
-            InternalSDKUtils.BuildUserAgentString("Rest Json Protocol", "3.3");
+            InternalSDKUtils.BuildUserAgentString("Rest Json Protocol", "4.0");
 
 
         private string _userAgent = UserAgentString;
diff --git a/sdk/test/Services/RestJsonProtocol/Properties/AssemblyInfo.cs b/sdk/test/Services/RestJsonProtocol/Properties/AssemblyInfo.cs
index 063a7e7956b9..be8dc27b91e1 100644
--- a/sdk/test/Services/RestJsonProtocol/Properties/AssemblyInfo.cs
+++ b/sdk/test/Services/RestJsonProtocol/Properties/AssemblyInfo.cs
@@ -41,5 +41,9 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.3")]
\ No newline at end of file
+#if BCL
+[assembly: AssemblyVersion("4.0")]
+#else
+[assembly: AssemblyVersion("4.0")]
+#endif
+[assembly: AssemblyFileVersion("4.0")]
\ No newline at end of file
diff --git a/sdk/test/Services/RestJsonProtocol/UnitTests/AWSSDK.UnitTests.RestJsonProtocol.NetFramework.csproj b/sdk/test/Services/RestJsonProtocol/UnitTests/AWSSDK.UnitTests.RestJsonProtocol.NetFramework.csproj
index c2a20d92c575..6e9fcb24d6a4 100644
--- a/sdk/test/Services/RestJsonProtocol/UnitTests/AWSSDK.UnitTests.RestJsonProtocol.NetFramework.csproj
+++ b/sdk/test/Services/RestJsonProtocol/UnitTests/AWSSDK.UnitTests.RestJsonProtocol.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);TRACE;BCL;ASYNC_AWAIT;DEBUG</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CS1591,CS0612,CS0618</NoWarn>
   </PropertyGroup>
   <ItemGroup>
diff --git a/sdk/test/Services/RestJsonTest/AWSSDK.RestJsonTest.NetFramework.csproj b/sdk/test/Services/RestJsonTest/AWSSDK.RestJsonTest.NetFramework.csproj
index 09ddf086b882..d390aeecdb77 100644
--- a/sdk/test/Services/RestJsonTest/AWSSDK.RestJsonTest.NetFramework.csproj
+++ b/sdk/test/Services/RestJsonTest/AWSSDK.RestJsonTest.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);BCL;AWS_ASYNC_API;CODE_ANALYSIS</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(RuleSetFileForBuild)' == 'false' Or '$(RuleSetFileForBuild)' == '' ">
diff --git a/sdk/test/Services/RestJsonTest/AWSSDK.RestJsonTest.NetStandard.csproj b/sdk/test/Services/RestJsonTest/AWSSDK.RestJsonTest.NetStandard.csproj
index f594f799dd90..79c498150da7 100644
--- a/sdk/test/Services/RestJsonTest/AWSSDK.RestJsonTest.NetStandard.csproj
+++ b/sdk/test/Services/RestJsonTest/AWSSDK.RestJsonTest.NetStandard.csproj
@@ -22,6 +22,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <!-- Async Enumerable Compatibility -->
diff --git a/sdk/test/Services/RestJsonTest/Generated/AmazonRestJsonTestConfig.cs b/sdk/test/Services/RestJsonTest/Generated/AmazonRestJsonTestConfig.cs
index e831c352c655..687e295038d7 100644
--- a/sdk/test/Services/RestJsonTest/Generated/AmazonRestJsonTestConfig.cs
+++ b/sdk/test/Services/RestJsonTest/Generated/AmazonRestJsonTestConfig.cs
@@ -34,7 +34,7 @@ namespace Amazon.RestJsonTest
     public partial class AmazonRestJsonTestConfig : ClientConfig
     {
         private static readonly string UserAgentString =
-            InternalSDKUtils.BuildUserAgentString("Rest-Json-Test", "3.3");
+            InternalSDKUtils.BuildUserAgentString("Rest-Json-Test", "4.0");
 
 
         private string _userAgent = UserAgentString;
diff --git a/sdk/test/Services/RestJsonTest/Properties/AssemblyInfo.cs b/sdk/test/Services/RestJsonTest/Properties/AssemblyInfo.cs
index 37fd24644b54..40649079d605 100644
--- a/sdk/test/Services/RestJsonTest/Properties/AssemblyInfo.cs
+++ b/sdk/test/Services/RestJsonTest/Properties/AssemblyInfo.cs
@@ -41,5 +41,9 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.3")]
\ No newline at end of file
+#if BCL
+[assembly: AssemblyVersion("4.0")]
+#else
+[assembly: AssemblyVersion("4.0")]
+#endif
+[assembly: AssemblyFileVersion("4.0")]
\ No newline at end of file
diff --git a/sdk/test/Services/RestJsonTest/UnitTests/AWSSDK.UnitTests.RestJsonTest.NetFramework.csproj b/sdk/test/Services/RestJsonTest/UnitTests/AWSSDK.UnitTests.RestJsonTest.NetFramework.csproj
index a51ad0da81c9..90da5c8f6d0b 100644
--- a/sdk/test/Services/RestJsonTest/UnitTests/AWSSDK.UnitTests.RestJsonTest.NetFramework.csproj
+++ b/sdk/test/Services/RestJsonTest/UnitTests/AWSSDK.UnitTests.RestJsonTest.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);TRACE;BCL;ASYNC_AWAIT;DEBUG</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CS1591,CS0612,CS0618</NoWarn>
   </PropertyGroup>
   <ItemGroup>
diff --git a/sdk/test/Services/RestXMLTest/AWSSDK.RestXMLTest.NetFramework.csproj b/sdk/test/Services/RestXMLTest/AWSSDK.RestXMLTest.NetFramework.csproj
index ec477ccfe965..36f42a0b2a47 100644
--- a/sdk/test/Services/RestXMLTest/AWSSDK.RestXMLTest.NetFramework.csproj
+++ b/sdk/test/Services/RestXMLTest/AWSSDK.RestXMLTest.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);BCL;AWS_ASYNC_API;CODE_ANALYSIS</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(RuleSetFileForBuild)' == 'false' Or '$(RuleSetFileForBuild)' == '' ">
diff --git a/sdk/test/Services/RestXMLTest/AWSSDK.RestXMLTest.NetStandard.csproj b/sdk/test/Services/RestXMLTest/AWSSDK.RestXMLTest.NetStandard.csproj
index 704ec34a85cc..73868761cd2f 100644
--- a/sdk/test/Services/RestXMLTest/AWSSDK.RestXMLTest.NetStandard.csproj
+++ b/sdk/test/Services/RestXMLTest/AWSSDK.RestXMLTest.NetStandard.csproj
@@ -22,6 +22,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <!-- Async Enumerable Compatibility -->
diff --git a/sdk/test/Services/RestXMLTest/Generated/AmazonRestXMLTestConfig.cs b/sdk/test/Services/RestXMLTest/Generated/AmazonRestXMLTestConfig.cs
index fc6ba954b0b9..35d0db671dbf 100644
--- a/sdk/test/Services/RestXMLTest/Generated/AmazonRestXMLTestConfig.cs
+++ b/sdk/test/Services/RestXMLTest/Generated/AmazonRestXMLTestConfig.cs
@@ -34,7 +34,7 @@ namespace Amazon.RestXMLTest
     public partial class AmazonRestXMLTestConfig : ClientConfig
     {
         private static readonly string UserAgentString =
-            InternalSDKUtils.BuildUserAgentString("Rest-XML-Test", "3.3");
+            InternalSDKUtils.BuildUserAgentString("Rest-XML-Test", "4.0");
 
 
         private string _userAgent = UserAgentString;
diff --git a/sdk/test/Services/RestXMLTest/Properties/AssemblyInfo.cs b/sdk/test/Services/RestXMLTest/Properties/AssemblyInfo.cs
index d956d78fa783..490e405b35a6 100644
--- a/sdk/test/Services/RestXMLTest/Properties/AssemblyInfo.cs
+++ b/sdk/test/Services/RestXMLTest/Properties/AssemblyInfo.cs
@@ -41,5 +41,9 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.3")]
\ No newline at end of file
+#if BCL
+[assembly: AssemblyVersion("4.0")]
+#else
+[assembly: AssemblyVersion("4.0")]
+#endif
+[assembly: AssemblyFileVersion("4.0")]
\ No newline at end of file
diff --git a/sdk/test/Services/RestXMLTest/UnitTests/AWSSDK.UnitTests.RestXMLTest.NetFramework.csproj b/sdk/test/Services/RestXMLTest/UnitTests/AWSSDK.UnitTests.RestXMLTest.NetFramework.csproj
index 5d918a38caab..fddb0bc39b3b 100644
--- a/sdk/test/Services/RestXMLTest/UnitTests/AWSSDK.UnitTests.RestXMLTest.NetFramework.csproj
+++ b/sdk/test/Services/RestXMLTest/UnitTests/AWSSDK.UnitTests.RestXMLTest.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);TRACE;BCL;ASYNC_AWAIT;DEBUG</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CS1591,CS0612,CS0618</NoWarn>
   </PropertyGroup>
   <ItemGroup>
diff --git a/sdk/test/Services/RestXmlProtocol/AWSSDK.RestXmlProtocol.NetFramework.csproj b/sdk/test/Services/RestXmlProtocol/AWSSDK.RestXmlProtocol.NetFramework.csproj
index 623fd2adb457..8d5e0dd1a838 100644
--- a/sdk/test/Services/RestXmlProtocol/AWSSDK.RestXmlProtocol.NetFramework.csproj
+++ b/sdk/test/Services/RestXmlProtocol/AWSSDK.RestXmlProtocol.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);BCL;AWS_ASYNC_API;CODE_ANALYSIS</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(RuleSetFileForBuild)' == 'false' Or '$(RuleSetFileForBuild)' == '' ">
diff --git a/sdk/test/Services/RestXmlProtocol/AWSSDK.RestXmlProtocol.NetStandard.csproj b/sdk/test/Services/RestXmlProtocol/AWSSDK.RestXmlProtocol.NetStandard.csproj
index a112c7c49c3d..9d02d2e99c22 100644
--- a/sdk/test/Services/RestXmlProtocol/AWSSDK.RestXmlProtocol.NetStandard.csproj
+++ b/sdk/test/Services/RestXmlProtocol/AWSSDK.RestXmlProtocol.NetStandard.csproj
@@ -22,6 +22,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <!-- Async Enumerable Compatibility -->
diff --git a/sdk/test/Services/RestXmlProtocol/Generated/AmazonRestXmlProtocolConfig.cs b/sdk/test/Services/RestXmlProtocol/Generated/AmazonRestXmlProtocolConfig.cs
index 17fc612a2794..710766936a46 100644
--- a/sdk/test/Services/RestXmlProtocol/Generated/AmazonRestXmlProtocolConfig.cs
+++ b/sdk/test/Services/RestXmlProtocol/Generated/AmazonRestXmlProtocolConfig.cs
@@ -34,7 +34,7 @@ namespace Amazon.RestXmlProtocol
     public partial class AmazonRestXmlProtocolConfig : ClientConfig
     {
         private static readonly string UserAgentString =
-            InternalSDKUtils.BuildUserAgentString("Rest Xml Protocol", "3.3");
+            InternalSDKUtils.BuildUserAgentString("Rest Xml Protocol", "4.0");
 
 
         private string _userAgent = UserAgentString;
diff --git a/sdk/test/Services/RestXmlProtocol/Properties/AssemblyInfo.cs b/sdk/test/Services/RestXmlProtocol/Properties/AssemblyInfo.cs
index c0f8a7b2c9f2..3b69d3997f7f 100644
--- a/sdk/test/Services/RestXmlProtocol/Properties/AssemblyInfo.cs
+++ b/sdk/test/Services/RestXmlProtocol/Properties/AssemblyInfo.cs
@@ -41,5 +41,9 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.3")]
\ No newline at end of file
+#if BCL
+[assembly: AssemblyVersion("4.0")]
+#else
+[assembly: AssemblyVersion("4.0")]
+#endif
+[assembly: AssemblyFileVersion("4.0")]
\ No newline at end of file
diff --git a/sdk/test/Services/RestXmlProtocol/UnitTests/AWSSDK.UnitTests.RestXmlProtocol.NetFramework.csproj b/sdk/test/Services/RestXmlProtocol/UnitTests/AWSSDK.UnitTests.RestXmlProtocol.NetFramework.csproj
index 82e7e2c441c9..5c5939efa0fe 100644
--- a/sdk/test/Services/RestXmlProtocol/UnitTests/AWSSDK.UnitTests.RestXmlProtocol.NetFramework.csproj
+++ b/sdk/test/Services/RestXmlProtocol/UnitTests/AWSSDK.UnitTests.RestXmlProtocol.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);TRACE;BCL;ASYNC_AWAIT;DEBUG</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CS1591,CS0612,CS0618</NoWarn>
   </PropertyGroup>
   <ItemGroup>
diff --git a/sdk/test/Services/RestXmlProtocolNamespace/AWSSDK.RestXmlProtocolNamespace.NetFramework.csproj b/sdk/test/Services/RestXmlProtocolNamespace/AWSSDK.RestXmlProtocolNamespace.NetFramework.csproj
index 03c823e2b887..b7318bbd1bc4 100644
--- a/sdk/test/Services/RestXmlProtocolNamespace/AWSSDK.RestXmlProtocolNamespace.NetFramework.csproj
+++ b/sdk/test/Services/RestXmlProtocolNamespace/AWSSDK.RestXmlProtocolNamespace.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);BCL;AWS_ASYNC_API;CODE_ANALYSIS</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(RuleSetFileForBuild)' == 'false' Or '$(RuleSetFileForBuild)' == '' ">
diff --git a/sdk/test/Services/RestXmlProtocolNamespace/AWSSDK.RestXmlProtocolNamespace.NetStandard.csproj b/sdk/test/Services/RestXmlProtocolNamespace/AWSSDK.RestXmlProtocolNamespace.NetStandard.csproj
index 84954d82a02a..9eb669c6acb2 100644
--- a/sdk/test/Services/RestXmlProtocolNamespace/AWSSDK.RestXmlProtocolNamespace.NetStandard.csproj
+++ b/sdk/test/Services/RestXmlProtocolNamespace/AWSSDK.RestXmlProtocolNamespace.NetStandard.csproj
@@ -22,6 +22,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <!-- Async Enumerable Compatibility -->
diff --git a/sdk/test/Services/RestXmlProtocolNamespace/Generated/AmazonRestXmlProtocolNamespaceConfig.cs b/sdk/test/Services/RestXmlProtocolNamespace/Generated/AmazonRestXmlProtocolNamespaceConfig.cs
index f4c6e8aead7e..4085081005ac 100644
--- a/sdk/test/Services/RestXmlProtocolNamespace/Generated/AmazonRestXmlProtocolNamespaceConfig.cs
+++ b/sdk/test/Services/RestXmlProtocolNamespace/Generated/AmazonRestXmlProtocolNamespaceConfig.cs
@@ -34,7 +34,7 @@ namespace Amazon.RestXmlProtocolNamespace
     public partial class AmazonRestXmlProtocolNamespaceConfig : ClientConfig
     {
         private static readonly string UserAgentString =
-            InternalSDKUtils.BuildUserAgentString("Rest Xml Protocol Namespace", "3.3");
+            InternalSDKUtils.BuildUserAgentString("Rest Xml Protocol Namespace", "4.0");
 
 
         private string _userAgent = UserAgentString;
diff --git a/sdk/test/Services/RestXmlProtocolNamespace/Properties/AssemblyInfo.cs b/sdk/test/Services/RestXmlProtocolNamespace/Properties/AssemblyInfo.cs
index 17c402af1add..8c03396c6967 100644
--- a/sdk/test/Services/RestXmlProtocolNamespace/Properties/AssemblyInfo.cs
+++ b/sdk/test/Services/RestXmlProtocolNamespace/Properties/AssemblyInfo.cs
@@ -41,5 +41,9 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.3")]
\ No newline at end of file
+#if BCL
+[assembly: AssemblyVersion("4.0")]
+#else
+[assembly: AssemblyVersion("4.0")]
+#endif
+[assembly: AssemblyFileVersion("4.0")]
\ No newline at end of file
diff --git a/sdk/test/Services/RestXmlProtocolNamespace/UnitTests/AWSSDK.UnitTests.RestXmlProtocolNamespace.NetFramework.csproj b/sdk/test/Services/RestXmlProtocolNamespace/UnitTests/AWSSDK.UnitTests.RestXmlProtocolNamespace.NetFramework.csproj
index 2e7da87b66b6..d8894d31b128 100644
--- a/sdk/test/Services/RestXmlProtocolNamespace/UnitTests/AWSSDK.UnitTests.RestXmlProtocolNamespace.NetFramework.csproj
+++ b/sdk/test/Services/RestXmlProtocolNamespace/UnitTests/AWSSDK.UnitTests.RestXmlProtocolNamespace.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);TRACE;BCL;ASYNC_AWAIT;DEBUG</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CS1591,CS0612,CS0618</NoWarn>
   </PropertyGroup>
   <ItemGroup>
diff --git a/sdk/test/Services/RoboMaker/UnitTests/AWSSDK.UnitTests.RoboMaker.NetFramework.csproj b/sdk/test/Services/RoboMaker/UnitTests/AWSSDK.UnitTests.RoboMaker.NetFramework.csproj
index 3f6a5a640fe5..59971c29478e 100644
--- a/sdk/test/Services/RoboMaker/UnitTests/AWSSDK.UnitTests.RoboMaker.NetFramework.csproj
+++ b/sdk/test/Services/RoboMaker/UnitTests/AWSSDK.UnitTests.RoboMaker.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);TRACE;BCL;ASYNC_AWAIT;DEBUG</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CS1591,CS0612,CS0618</NoWarn>
   </PropertyGroup>
   <ItemGroup>
diff --git a/sdk/test/Services/Route53/IntegrationTests/AWSSDK.IntegrationTests.Route53.NetFramework.csproj b/sdk/test/Services/Route53/IntegrationTests/AWSSDK.IntegrationTests.Route53.NetFramework.csproj
index 8212b6372267..1c67ee3b3769 100644
--- a/sdk/test/Services/Route53/IntegrationTests/AWSSDK.IntegrationTests.Route53.NetFramework.csproj
+++ b/sdk/test/Services/Route53/IntegrationTests/AWSSDK.IntegrationTests.Route53.NetFramework.csproj
@@ -1,6 +1,6 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);DEBUG;TRACE;BCL;ASYNC_AWAIT;LOCAL_FILE</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>false</GenerateDocumentationFile>
diff --git a/sdk/test/Services/Route53/UnitTests/AWSSDK.UnitTests.Route53.NetFramework.csproj b/sdk/test/Services/Route53/UnitTests/AWSSDK.UnitTests.Route53.NetFramework.csproj
index fdd965837221..9f40a1b5b621 100644
--- a/sdk/test/Services/Route53/UnitTests/AWSSDK.UnitTests.Route53.NetFramework.csproj
+++ b/sdk/test/Services/Route53/UnitTests/AWSSDK.UnitTests.Route53.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);TRACE;BCL;ASYNC_AWAIT;DEBUG</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CS1591,CS0612,CS0618</NoWarn>
   </PropertyGroup>
   <ItemGroup>
diff --git a/sdk/test/Services/Route53Domains/IntegrationTests/AWSSDK.IntegrationTests.Route53Domains.NetFramework.csproj b/sdk/test/Services/Route53Domains/IntegrationTests/AWSSDK.IntegrationTests.Route53Domains.NetFramework.csproj
index 0a0d6d9412c9..821319d80995 100644
--- a/sdk/test/Services/Route53Domains/IntegrationTests/AWSSDK.IntegrationTests.Route53Domains.NetFramework.csproj
+++ b/sdk/test/Services/Route53Domains/IntegrationTests/AWSSDK.IntegrationTests.Route53Domains.NetFramework.csproj
@@ -1,6 +1,6 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);DEBUG;TRACE;BCL;ASYNC_AWAIT;LOCAL_FILE</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>false</GenerateDocumentationFile>
diff --git a/sdk/test/Services/Route53Domains/UnitTests/AWSSDK.UnitTests.Route53Domains.NetFramework.csproj b/sdk/test/Services/Route53Domains/UnitTests/AWSSDK.UnitTests.Route53Domains.NetFramework.csproj
index 0c925d9a2b74..d374fa3a7796 100644
--- a/sdk/test/Services/Route53Domains/UnitTests/AWSSDK.UnitTests.Route53Domains.NetFramework.csproj
+++ b/sdk/test/Services/Route53Domains/UnitTests/AWSSDK.UnitTests.Route53Domains.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);TRACE;BCL;ASYNC_AWAIT;DEBUG</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CS1591,CS0612,CS0618</NoWarn>
   </PropertyGroup>
   <ItemGroup>
diff --git a/sdk/test/Services/Route53Profiles/UnitTests/AWSSDK.UnitTests.Route53Profiles.NetFramework.csproj b/sdk/test/Services/Route53Profiles/UnitTests/AWSSDK.UnitTests.Route53Profiles.NetFramework.csproj
index 48a69623cf64..a491778c22a2 100644
--- a/sdk/test/Services/Route53Profiles/UnitTests/AWSSDK.UnitTests.Route53Profiles.NetFramework.csproj
+++ b/sdk/test/Services/Route53Profiles/UnitTests/AWSSDK.UnitTests.Route53Profiles.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);TRACE;BCL;ASYNC_AWAIT;DEBUG</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CS1591,CS0612,CS0618</NoWarn>
   </PropertyGroup>
   <ItemGroup>
diff --git a/sdk/test/Services/Route53RecoveryCluster/UnitTests/AWSSDK.UnitTests.Route53RecoveryCluster.NetFramework.csproj b/sdk/test/Services/Route53RecoveryCluster/UnitTests/AWSSDK.UnitTests.Route53RecoveryCluster.NetFramework.csproj
index 980857c77a27..c5878a92c32c 100644
--- a/sdk/test/Services/Route53RecoveryCluster/UnitTests/AWSSDK.UnitTests.Route53RecoveryCluster.NetFramework.csproj
+++ b/sdk/test/Services/Route53RecoveryCluster/UnitTests/AWSSDK.UnitTests.Route53RecoveryCluster.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);TRACE;BCL;ASYNC_AWAIT;DEBUG</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CS1591,CS0612,CS0618</NoWarn>
   </PropertyGroup>
   <ItemGroup>
diff --git a/sdk/test/Services/Route53RecoveryControlConfig/UnitTests/AWSSDK.UnitTests.Route53RecoveryControlConfig.NetFramework.csproj b/sdk/test/Services/Route53RecoveryControlConfig/UnitTests/AWSSDK.UnitTests.Route53RecoveryControlConfig.NetFramework.csproj
index 4f950c850a5e..f3cdb111c1a8 100644
--- a/sdk/test/Services/Route53RecoveryControlConfig/UnitTests/AWSSDK.UnitTests.Route53RecoveryControlConfig.NetFramework.csproj
+++ b/sdk/test/Services/Route53RecoveryControlConfig/UnitTests/AWSSDK.UnitTests.Route53RecoveryControlConfig.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);TRACE;BCL;ASYNC_AWAIT;DEBUG</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CS1591,CS0612,CS0618</NoWarn>
   </PropertyGroup>
   <ItemGroup>
diff --git a/sdk/test/Services/Route53RecoveryReadiness/UnitTests/AWSSDK.UnitTests.Route53RecoveryReadiness.NetFramework.csproj b/sdk/test/Services/Route53RecoveryReadiness/UnitTests/AWSSDK.UnitTests.Route53RecoveryReadiness.NetFramework.csproj
index 97eeacf9dcc1..59ae61c3ab07 100644
--- a/sdk/test/Services/Route53RecoveryReadiness/UnitTests/AWSSDK.UnitTests.Route53RecoveryReadiness.NetFramework.csproj
+++ b/sdk/test/Services/Route53RecoveryReadiness/UnitTests/AWSSDK.UnitTests.Route53RecoveryReadiness.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);TRACE;BCL;ASYNC_AWAIT;DEBUG</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CS1591,CS0612,CS0618</NoWarn>
   </PropertyGroup>
   <ItemGroup>
diff --git a/sdk/test/Services/Route53Resolver/UnitTests/AWSSDK.UnitTests.Route53Resolver.NetFramework.csproj b/sdk/test/Services/Route53Resolver/UnitTests/AWSSDK.UnitTests.Route53Resolver.NetFramework.csproj
index cd73d78c742d..c38f0bd401bc 100644
--- a/sdk/test/Services/Route53Resolver/UnitTests/AWSSDK.UnitTests.Route53Resolver.NetFramework.csproj
+++ b/sdk/test/Services/Route53Resolver/UnitTests/AWSSDK.UnitTests.Route53Resolver.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);TRACE;BCL;ASYNC_AWAIT;DEBUG</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
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   <ItemGroup>
diff --git a/sdk/test/Services/S3/IntegrationTests/AWSSDK.IntegrationTests.S3.NetFramework.csproj b/sdk/test/Services/S3/IntegrationTests/AWSSDK.IntegrationTests.S3.NetFramework.csproj
index fb23abc23c47..7c47e17b12c0 100644
--- a/sdk/test/Services/S3/IntegrationTests/AWSSDK.IntegrationTests.S3.NetFramework.csproj
+++ b/sdk/test/Services/S3/IntegrationTests/AWSSDK.IntegrationTests.S3.NetFramework.csproj
@@ -1,6 +1,6 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);DEBUG;TRACE;BCL;ASYNC_AWAIT;LOCAL_FILE</DefineConstants>
     <DebugType>portable</DebugType>
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diff --git a/sdk/test/Services/S3/UnitTests/AWSSDK.UnitTests.S3.NetFramework.csproj b/sdk/test/Services/S3/UnitTests/AWSSDK.UnitTests.S3.NetFramework.csproj
index 5141e72f74ca..97876c41652c 100644
--- a/sdk/test/Services/S3/UnitTests/AWSSDK.UnitTests.S3.NetFramework.csproj
+++ b/sdk/test/Services/S3/UnitTests/AWSSDK.UnitTests.S3.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);TRACE;BCL;ASYNC_AWAIT;DEBUG</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
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+    <LangVersion>9.0</LangVersion>
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diff --git a/sdk/test/Services/S3Control/UnitTests/AWSSDK.UnitTests.S3Control.NetFramework.csproj b/sdk/test/Services/S3Control/UnitTests/AWSSDK.UnitTests.S3Control.NetFramework.csproj
index e90318f25573..791cdcf8731b 100644
--- a/sdk/test/Services/S3Control/UnitTests/AWSSDK.UnitTests.S3Control.NetFramework.csproj
+++ b/sdk/test/Services/S3Control/UnitTests/AWSSDK.UnitTests.S3Control.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
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    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);TRACE;BCL;ASYNC_AWAIT;DEBUG</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
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diff --git a/sdk/test/Services/S3Outposts/UnitTests/AWSSDK.UnitTests.S3Outposts.NetFramework.csproj b/sdk/test/Services/S3Outposts/UnitTests/AWSSDK.UnitTests.S3Outposts.NetFramework.csproj
index f1e0facc3c19..da68af4178b1 100644
--- a/sdk/test/Services/S3Outposts/UnitTests/AWSSDK.UnitTests.S3Outposts.NetFramework.csproj
+++ b/sdk/test/Services/S3Outposts/UnitTests/AWSSDK.UnitTests.S3Outposts.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
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     <DefineConstants>$(DefineConstants);TRACE;BCL;ASYNC_AWAIT;DEBUG</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
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+    <LangVersion>9.0</LangVersion>
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   <ItemGroup>
diff --git a/sdk/test/Services/SQS/IntegrationTests/AWSSDK.IntegrationTests.SQS.NetFramework.csproj b/sdk/test/Services/SQS/IntegrationTests/AWSSDK.IntegrationTests.SQS.NetFramework.csproj
index e06ff96d46a0..715aa15089d5 100644
--- a/sdk/test/Services/SQS/IntegrationTests/AWSSDK.IntegrationTests.SQS.NetFramework.csproj
+++ b/sdk/test/Services/SQS/IntegrationTests/AWSSDK.IntegrationTests.SQS.NetFramework.csproj
@@ -1,6 +1,6 @@
 <Project Sdk="Microsoft.NET.Sdk">
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+    <TargetFramework>net472</TargetFramework>
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     <DebugType>portable</DebugType>
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diff --git a/sdk/test/Services/SQS/UnitTests/AWSSDK.UnitTests.SQS.NetFramework.csproj b/sdk/test/Services/SQS/UnitTests/AWSSDK.UnitTests.SQS.NetFramework.csproj
index ea181d32322a..7d0cf5b0a073 100644
--- a/sdk/test/Services/SQS/UnitTests/AWSSDK.UnitTests.SQS.NetFramework.csproj
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@@ -1,7 +1,7 @@
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-    <TargetFramework>net462</TargetFramework>
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@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
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+    <LangVersion>9.0</LangVersion>
     <NoWarn>CS1591,CS0612,CS0618</NoWarn>
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   <ItemGroup>
diff --git a/sdk/test/Services/SSMContacts/UnitTests/AWSSDK.UnitTests.SSMContacts.NetFramework.csproj b/sdk/test/Services/SSMContacts/UnitTests/AWSSDK.UnitTests.SSMContacts.NetFramework.csproj
index 04046c5a9a04..0248ffd2cbec 100644
--- a/sdk/test/Services/SSMContacts/UnitTests/AWSSDK.UnitTests.SSMContacts.NetFramework.csproj
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@@ -1,7 +1,7 @@
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    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
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@@ -19,6 +19,7 @@
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+    <LangVersion>9.0</LangVersion>
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diff --git a/sdk/test/Services/SSMIncidents/UnitTests/AWSSDK.UnitTests.SSMIncidents.NetFramework.csproj b/sdk/test/Services/SSMIncidents/UnitTests/AWSSDK.UnitTests.SSMIncidents.NetFramework.csproj
index 3c472bb0bc56..06c3331dc73a 100644
--- a/sdk/test/Services/SSMIncidents/UnitTests/AWSSDK.UnitTests.SSMIncidents.NetFramework.csproj
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@@ -1,7 +1,7 @@
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    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
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@@ -19,6 +19,7 @@
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+    <LangVersion>9.0</LangVersion>
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diff --git a/sdk/test/Services/SSO/UnitTests/AWSSDK.UnitTests.SSO.NetFramework.csproj b/sdk/test/Services/SSO/UnitTests/AWSSDK.UnitTests.SSO.NetFramework.csproj
index 92f57649cb4b..c07575d4d77f 100644
--- a/sdk/test/Services/SSO/UnitTests/AWSSDK.UnitTests.SSO.NetFramework.csproj
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@@ -1,7 +1,7 @@
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@@ -19,6 +19,7 @@
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+    <LangVersion>9.0</LangVersion>
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diff --git a/sdk/test/Services/SSOAdmin/UnitTests/AWSSDK.UnitTests.SSOAdmin.NetFramework.csproj b/sdk/test/Services/SSOAdmin/UnitTests/AWSSDK.UnitTests.SSOAdmin.NetFramework.csproj
index a951e0ab1290..ed7bd07b56e8 100644
--- a/sdk/test/Services/SSOAdmin/UnitTests/AWSSDK.UnitTests.SSOAdmin.NetFramework.csproj
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@@ -1,7 +1,7 @@
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@@ -19,6 +19,7 @@
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+    <LangVersion>9.0</LangVersion>
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diff --git a/sdk/test/Services/SSOOIDC/UnitTests/AWSSDK.UnitTests.SSOOIDC.NetFramework.csproj b/sdk/test/Services/SSOOIDC/UnitTests/AWSSDK.UnitTests.SSOOIDC.NetFramework.csproj
index f7a1231c2097..ac46ae262e03 100644
--- a/sdk/test/Services/SSOOIDC/UnitTests/AWSSDK.UnitTests.SSOOIDC.NetFramework.csproj
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    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
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@@ -19,6 +19,7 @@
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+    <LangVersion>9.0</LangVersion>
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diff --git a/sdk/test/Services/SageMaker/UnitTests/AWSSDK.UnitTests.SageMaker.NetFramework.csproj b/sdk/test/Services/SageMaker/UnitTests/AWSSDK.UnitTests.SageMaker.NetFramework.csproj
index b2098c4f7135..965f4a619690 100644
--- a/sdk/test/Services/SageMaker/UnitTests/AWSSDK.UnitTests.SageMaker.NetFramework.csproj
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@@ -1,7 +1,7 @@
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-    <TargetFramework>net462</TargetFramework>
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@@ -19,6 +19,7 @@
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+    <LangVersion>9.0</LangVersion>
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diff --git a/sdk/test/Services/SageMakerFeatureStoreRuntime/UnitTests/AWSSDK.UnitTests.SageMakerFeatureStoreRuntime.NetFramework.csproj b/sdk/test/Services/SageMakerFeatureStoreRuntime/UnitTests/AWSSDK.UnitTests.SageMakerFeatureStoreRuntime.NetFramework.csproj
index 7560bb9af250..2bf7f9300ce1 100644
--- a/sdk/test/Services/SageMakerFeatureStoreRuntime/UnitTests/AWSSDK.UnitTests.SageMakerFeatureStoreRuntime.NetFramework.csproj
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@@ -19,6 +19,7 @@
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+    <LangVersion>9.0</LangVersion>
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diff --git a/sdk/test/Services/SageMakerGeospatial/UnitTests/AWSSDK.UnitTests.SageMakerGeospatial.NetFramework.csproj b/sdk/test/Services/SageMakerGeospatial/UnitTests/AWSSDK.UnitTests.SageMakerGeospatial.NetFramework.csproj
index c031aba1e04d..3d2a07556ab7 100644
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@@ -1,7 +1,7 @@
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@@ -19,6 +19,7 @@
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+    <LangVersion>9.0</LangVersion>
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diff --git a/sdk/test/Services/SageMakerMetrics/UnitTests/AWSSDK.UnitTests.SageMakerMetrics.NetFramework.csproj b/sdk/test/Services/SageMakerMetrics/UnitTests/AWSSDK.UnitTests.SageMakerMetrics.NetFramework.csproj
index 65c62b026800..9e7f83f4175f 100644
--- a/sdk/test/Services/SageMakerMetrics/UnitTests/AWSSDK.UnitTests.SageMakerMetrics.NetFramework.csproj
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@@ -1,7 +1,7 @@
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@@ -19,6 +19,7 @@
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+    <LangVersion>9.0</LangVersion>
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diff --git a/sdk/test/Services/SageMakerRuntime/UnitTests/AWSSDK.UnitTests.SageMakerRuntime.NetFramework.csproj b/sdk/test/Services/SageMakerRuntime/UnitTests/AWSSDK.UnitTests.SageMakerRuntime.NetFramework.csproj
index 30a53d47a487..af5afda9c312 100644
--- a/sdk/test/Services/SageMakerRuntime/UnitTests/AWSSDK.UnitTests.SageMakerRuntime.NetFramework.csproj
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@@ -1,7 +1,7 @@
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@@ -19,6 +19,7 @@
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+    <LangVersion>9.0</LangVersion>
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diff --git a/sdk/test/Services/SagemakerEdgeManager/UnitTests/AWSSDK.UnitTests.SagemakerEdgeManager.NetFramework.csproj b/sdk/test/Services/SagemakerEdgeManager/UnitTests/AWSSDK.UnitTests.SagemakerEdgeManager.NetFramework.csproj
index b707f8494a9f..8bbafa0106d2 100644
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@@ -19,6 +19,7 @@
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+    <LangVersion>9.0</LangVersion>
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diff --git a/sdk/test/Services/SavingsPlans/UnitTests/AWSSDK.UnitTests.SavingsPlans.NetFramework.csproj b/sdk/test/Services/SavingsPlans/UnitTests/AWSSDK.UnitTests.SavingsPlans.NetFramework.csproj
index 2616cf90b89d..bad19dec7397 100644
--- a/sdk/test/Services/SavingsPlans/UnitTests/AWSSDK.UnitTests.SavingsPlans.NetFramework.csproj
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@@ -19,6 +19,7 @@
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+    <LangVersion>9.0</LangVersion>
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diff --git a/sdk/test/Services/Scheduler/UnitTests/AWSSDK.UnitTests.Scheduler.NetFramework.csproj b/sdk/test/Services/Scheduler/UnitTests/AWSSDK.UnitTests.Scheduler.NetFramework.csproj
index 7310e4c30665..5a24a31d6ce1 100644
--- a/sdk/test/Services/Scheduler/UnitTests/AWSSDK.UnitTests.Scheduler.NetFramework.csproj
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@@ -19,6 +19,7 @@
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+    <LangVersion>9.0</LangVersion>
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diff --git a/sdk/test/Services/Schemas/UnitTests/AWSSDK.UnitTests.Schemas.NetFramework.csproj b/sdk/test/Services/Schemas/UnitTests/AWSSDK.UnitTests.Schemas.NetFramework.csproj
index 2c7afc2dde9c..2ac5b8a48c1a 100644
--- a/sdk/test/Services/Schemas/UnitTests/AWSSDK.UnitTests.Schemas.NetFramework.csproj
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@@ -19,6 +19,7 @@
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+    <LangVersion>9.0</LangVersion>
     <NoWarn>CS1591,CS0612,CS0618</NoWarn>
   </PropertyGroup>
   <ItemGroup>
diff --git a/sdk/test/Services/SecretsManager/UnitTests/AWSSDK.UnitTests.SecretsManager.NetFramework.csproj b/sdk/test/Services/SecretsManager/UnitTests/AWSSDK.UnitTests.SecretsManager.NetFramework.csproj
index 692191804c75..0c86fd305aac 100644
--- a/sdk/test/Services/SecretsManager/UnitTests/AWSSDK.UnitTests.SecretsManager.NetFramework.csproj
+++ b/sdk/test/Services/SecretsManager/UnitTests/AWSSDK.UnitTests.SecretsManager.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);TRACE;BCL;ASYNC_AWAIT;DEBUG</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CS1591,CS0612,CS0618</NoWarn>
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   <ItemGroup>
diff --git a/sdk/test/Services/SecurityHub/UnitTests/AWSSDK.UnitTests.SecurityHub.NetFramework.csproj b/sdk/test/Services/SecurityHub/UnitTests/AWSSDK.UnitTests.SecurityHub.NetFramework.csproj
index 4019db34b6f1..5a42ab280c52 100644
--- a/sdk/test/Services/SecurityHub/UnitTests/AWSSDK.UnitTests.SecurityHub.NetFramework.csproj
+++ b/sdk/test/Services/SecurityHub/UnitTests/AWSSDK.UnitTests.SecurityHub.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);TRACE;BCL;ASYNC_AWAIT;DEBUG</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CS1591,CS0612,CS0618</NoWarn>
   </PropertyGroup>
   <ItemGroup>
diff --git a/sdk/test/Services/SecurityLake/UnitTests/AWSSDK.UnitTests.SecurityLake.NetFramework.csproj b/sdk/test/Services/SecurityLake/UnitTests/AWSSDK.UnitTests.SecurityLake.NetFramework.csproj
index 39dfd32e6186..da3ed5386428 100644
--- a/sdk/test/Services/SecurityLake/UnitTests/AWSSDK.UnitTests.SecurityLake.NetFramework.csproj
+++ b/sdk/test/Services/SecurityLake/UnitTests/AWSSDK.UnitTests.SecurityLake.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);TRACE;BCL;ASYNC_AWAIT;DEBUG</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CS1591,CS0612,CS0618</NoWarn>
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   <ItemGroup>
diff --git a/sdk/test/Services/SecurityToken/IntegrationTests/AWSSDK.IntegrationTests.SecurityToken.NetFramework.csproj b/sdk/test/Services/SecurityToken/IntegrationTests/AWSSDK.IntegrationTests.SecurityToken.NetFramework.csproj
index a58b53b4686e..9001e0b3feae 100644
--- a/sdk/test/Services/SecurityToken/IntegrationTests/AWSSDK.IntegrationTests.SecurityToken.NetFramework.csproj
+++ b/sdk/test/Services/SecurityToken/IntegrationTests/AWSSDK.IntegrationTests.SecurityToken.NetFramework.csproj
@@ -1,6 +1,6 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);DEBUG;TRACE;BCL;ASYNC_AWAIT;LOCAL_FILE</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>false</GenerateDocumentationFile>
diff --git a/sdk/test/Services/SecurityToken/UnitTests/AWSSDK.UnitTests.SecurityToken.NetFramework.csproj b/sdk/test/Services/SecurityToken/UnitTests/AWSSDK.UnitTests.SecurityToken.NetFramework.csproj
index bdc190be819a..15df5d1bd24f 100644
--- a/sdk/test/Services/SecurityToken/UnitTests/AWSSDK.UnitTests.SecurityToken.NetFramework.csproj
+++ b/sdk/test/Services/SecurityToken/UnitTests/AWSSDK.UnitTests.SecurityToken.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);TRACE;BCL;ASYNC_AWAIT;DEBUG</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CS1591,CS0612,CS0618</NoWarn>
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   <ItemGroup>
diff --git a/sdk/test/Services/ServerMigrationService/IntegrationTests/AWSSDK.IntegrationTests.ServerMigrationService.NetFramework.csproj b/sdk/test/Services/ServerMigrationService/IntegrationTests/AWSSDK.IntegrationTests.ServerMigrationService.NetFramework.csproj
index 34b886662c77..a7cc6b979229 100644
--- a/sdk/test/Services/ServerMigrationService/IntegrationTests/AWSSDK.IntegrationTests.ServerMigrationService.NetFramework.csproj
+++ b/sdk/test/Services/ServerMigrationService/IntegrationTests/AWSSDK.IntegrationTests.ServerMigrationService.NetFramework.csproj
@@ -1,6 +1,6 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);DEBUG;TRACE;BCL;ASYNC_AWAIT;LOCAL_FILE</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>false</GenerateDocumentationFile>
diff --git a/sdk/test/Services/ServerMigrationService/UnitTests/AWSSDK.UnitTests.ServerMigrationService.NetFramework.csproj b/sdk/test/Services/ServerMigrationService/UnitTests/AWSSDK.UnitTests.ServerMigrationService.NetFramework.csproj
index e02371da097e..c3d4faaa1a52 100644
--- a/sdk/test/Services/ServerMigrationService/UnitTests/AWSSDK.UnitTests.ServerMigrationService.NetFramework.csproj
+++ b/sdk/test/Services/ServerMigrationService/UnitTests/AWSSDK.UnitTests.ServerMigrationService.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);TRACE;BCL;ASYNC_AWAIT;DEBUG</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CS1591,CS0612,CS0618</NoWarn>
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   <ItemGroup>
diff --git a/sdk/test/Services/ServerlessApplicationRepository/UnitTests/AWSSDK.UnitTests.ServerlessApplicationRepository.NetFramework.csproj b/sdk/test/Services/ServerlessApplicationRepository/UnitTests/AWSSDK.UnitTests.ServerlessApplicationRepository.NetFramework.csproj
index e1919024adf5..0ceae1b66a05 100644
--- a/sdk/test/Services/ServerlessApplicationRepository/UnitTests/AWSSDK.UnitTests.ServerlessApplicationRepository.NetFramework.csproj
+++ b/sdk/test/Services/ServerlessApplicationRepository/UnitTests/AWSSDK.UnitTests.ServerlessApplicationRepository.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
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     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
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+    <LangVersion>9.0</LangVersion>
     <NoWarn>CS1591,CS0612,CS0618</NoWarn>
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   <ItemGroup>
diff --git a/sdk/test/Services/ServiceCatalog/UnitTests/AWSSDK.UnitTests.ServiceCatalog.NetFramework.csproj b/sdk/test/Services/ServiceCatalog/UnitTests/AWSSDK.UnitTests.ServiceCatalog.NetFramework.csproj
index 25b5f32b63d2..2190ad53cb84 100644
--- a/sdk/test/Services/ServiceCatalog/UnitTests/AWSSDK.UnitTests.ServiceCatalog.NetFramework.csproj
+++ b/sdk/test/Services/ServiceCatalog/UnitTests/AWSSDK.UnitTests.ServiceCatalog.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
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     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CS1591,CS0612,CS0618</NoWarn>
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   <ItemGroup>
diff --git a/sdk/test/Services/ServiceDiscovery/UnitTests/AWSSDK.UnitTests.ServiceDiscovery.NetFramework.csproj b/sdk/test/Services/ServiceDiscovery/UnitTests/AWSSDK.UnitTests.ServiceDiscovery.NetFramework.csproj
index 6aa497e2fd31..d04a187257d7 100644
--- a/sdk/test/Services/ServiceDiscovery/UnitTests/AWSSDK.UnitTests.ServiceDiscovery.NetFramework.csproj
+++ b/sdk/test/Services/ServiceDiscovery/UnitTests/AWSSDK.UnitTests.ServiceDiscovery.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
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     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CS1591,CS0612,CS0618</NoWarn>
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   <ItemGroup>
diff --git a/sdk/test/Services/ServiceQuotas/UnitTests/AWSSDK.UnitTests.ServiceQuotas.NetFramework.csproj b/sdk/test/Services/ServiceQuotas/UnitTests/AWSSDK.UnitTests.ServiceQuotas.NetFramework.csproj
index 7711554ce3d4..9163c4231e3c 100644
--- a/sdk/test/Services/ServiceQuotas/UnitTests/AWSSDK.UnitTests.ServiceQuotas.NetFramework.csproj
+++ b/sdk/test/Services/ServiceQuotas/UnitTests/AWSSDK.UnitTests.ServiceQuotas.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
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     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
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   <ItemGroup>
diff --git a/sdk/test/Services/Shield/UnitTests/AWSSDK.UnitTests.Shield.NetFramework.csproj b/sdk/test/Services/Shield/UnitTests/AWSSDK.UnitTests.Shield.NetFramework.csproj
index 2e51e5e17e19..da235e9e7f6b 100644
--- a/sdk/test/Services/Shield/UnitTests/AWSSDK.UnitTests.Shield.NetFramework.csproj
+++ b/sdk/test/Services/Shield/UnitTests/AWSSDK.UnitTests.Shield.NetFramework.csproj
@@ -1,7 +1,7 @@
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   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
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     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
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+    <LangVersion>9.0</LangVersion>
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diff --git a/sdk/test/Services/Signer/UnitTests/AWSSDK.UnitTests.Signer.NetFramework.csproj b/sdk/test/Services/Signer/UnitTests/AWSSDK.UnitTests.Signer.NetFramework.csproj
index 1e4c7c37c336..3cf6b559eb5b 100644
--- a/sdk/test/Services/Signer/UnitTests/AWSSDK.UnitTests.Signer.NetFramework.csproj
+++ b/sdk/test/Services/Signer/UnitTests/AWSSDK.UnitTests.Signer.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
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@@ -19,6 +19,7 @@
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+    <LangVersion>9.0</LangVersion>
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diff --git a/sdk/test/Services/SimSpaceWeaver/UnitTests/AWSSDK.UnitTests.SimSpaceWeaver.NetFramework.csproj b/sdk/test/Services/SimSpaceWeaver/UnitTests/AWSSDK.UnitTests.SimSpaceWeaver.NetFramework.csproj
index ce7f83a6ca5e..7ce21f4b302f 100644
--- a/sdk/test/Services/SimSpaceWeaver/UnitTests/AWSSDK.UnitTests.SimSpaceWeaver.NetFramework.csproj
+++ b/sdk/test/Services/SimSpaceWeaver/UnitTests/AWSSDK.UnitTests.SimSpaceWeaver.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
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     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
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+    <LangVersion>9.0</LangVersion>
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diff --git a/sdk/test/Services/SimpleDB/IntegrationTests/AWSSDK.IntegrationTests.SimpleDB.NetFramework.csproj b/sdk/test/Services/SimpleDB/IntegrationTests/AWSSDK.IntegrationTests.SimpleDB.NetFramework.csproj
index 517c9a7f29a8..4e180993ce81 100644
--- a/sdk/test/Services/SimpleDB/IntegrationTests/AWSSDK.IntegrationTests.SimpleDB.NetFramework.csproj
+++ b/sdk/test/Services/SimpleDB/IntegrationTests/AWSSDK.IntegrationTests.SimpleDB.NetFramework.csproj
@@ -1,6 +1,6 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
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     <GenerateDocumentationFile>false</GenerateDocumentationFile>
diff --git a/sdk/test/Services/SimpleDB/UnitTests/AWSSDK.UnitTests.SimpleDB.NetFramework.csproj b/sdk/test/Services/SimpleDB/UnitTests/AWSSDK.UnitTests.SimpleDB.NetFramework.csproj
index 4914c98bb217..8ff64ecd1383 100644
--- a/sdk/test/Services/SimpleDB/UnitTests/AWSSDK.UnitTests.SimpleDB.NetFramework.csproj
+++ b/sdk/test/Services/SimpleDB/UnitTests/AWSSDK.UnitTests.SimpleDB.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
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     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
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+    <LangVersion>9.0</LangVersion>
     <NoWarn>CS1591,CS0612,CS0618</NoWarn>
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   <ItemGroup>
diff --git a/sdk/test/Services/SimpleEmail/IntegrationTests/AWSSDK.IntegrationTests.SimpleEmail.NetFramework.csproj b/sdk/test/Services/SimpleEmail/IntegrationTests/AWSSDK.IntegrationTests.SimpleEmail.NetFramework.csproj
index b6678af8aa97..d039a0bfe6ee 100644
--- a/sdk/test/Services/SimpleEmail/IntegrationTests/AWSSDK.IntegrationTests.SimpleEmail.NetFramework.csproj
+++ b/sdk/test/Services/SimpleEmail/IntegrationTests/AWSSDK.IntegrationTests.SimpleEmail.NetFramework.csproj
@@ -1,6 +1,6 @@
 <Project Sdk="Microsoft.NET.Sdk">
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-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
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     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>false</GenerateDocumentationFile>
diff --git a/sdk/test/Services/SimpleEmail/UnitTests/AWSSDK.UnitTests.SimpleEmail.NetFramework.csproj b/sdk/test/Services/SimpleEmail/UnitTests/AWSSDK.UnitTests.SimpleEmail.NetFramework.csproj
index 2f034db7a0b5..f854285a0c15 100644
--- a/sdk/test/Services/SimpleEmail/UnitTests/AWSSDK.UnitTests.SimpleEmail.NetFramework.csproj
+++ b/sdk/test/Services/SimpleEmail/UnitTests/AWSSDK.UnitTests.SimpleEmail.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
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    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
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     <DebugType>portable</DebugType>
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@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
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+    <LangVersion>9.0</LangVersion>
     <NoWarn>CS1591,CS0612,CS0618</NoWarn>
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   <ItemGroup>
diff --git a/sdk/test/Services/SimpleEmailV2/UnitTests/AWSSDK.UnitTests.SimpleEmailV2.NetFramework.csproj b/sdk/test/Services/SimpleEmailV2/UnitTests/AWSSDK.UnitTests.SimpleEmailV2.NetFramework.csproj
index 48e4ae80100b..1a567a8e0d31 100644
--- a/sdk/test/Services/SimpleEmailV2/UnitTests/AWSSDK.UnitTests.SimpleEmailV2.NetFramework.csproj
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@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
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-    <TargetFramework>net462</TargetFramework>
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@@ -19,6 +19,7 @@
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+    <LangVersion>9.0</LangVersion>
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diff --git a/sdk/test/Services/SimpleNotificationService/IntegrationTests/AWSSDK.IntegrationTests.SimpleNotificationService.NetFramework.csproj b/sdk/test/Services/SimpleNotificationService/IntegrationTests/AWSSDK.IntegrationTests.SimpleNotificationService.NetFramework.csproj
index 08f80c780c39..476a4b79e69c 100644
--- a/sdk/test/Services/SimpleNotificationService/IntegrationTests/AWSSDK.IntegrationTests.SimpleNotificationService.NetFramework.csproj
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@@ -1,6 +1,6 @@
 <Project Sdk="Microsoft.NET.Sdk">
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+    <TargetFramework>net472</TargetFramework>
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diff --git a/sdk/test/Services/SimpleNotificationService/UnitTests/AWSSDK.UnitTests.SimpleNotificationService.NetFramework.csproj b/sdk/test/Services/SimpleNotificationService/UnitTests/AWSSDK.UnitTests.SimpleNotificationService.NetFramework.csproj
index a8e4025f5cef..0aaa0f344086 100644
--- a/sdk/test/Services/SimpleNotificationService/UnitTests/AWSSDK.UnitTests.SimpleNotificationService.NetFramework.csproj
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@@ -1,7 +1,7 @@
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-    <TargetFramework>net462</TargetFramework>
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@@ -19,6 +19,7 @@
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+    <LangVersion>9.0</LangVersion>
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diff --git a/sdk/test/Services/SimpleSystemsManagement/IntegrationTests/AWSSDK.IntegrationTests.SimpleSystemsManagement.NetFramework.csproj b/sdk/test/Services/SimpleSystemsManagement/IntegrationTests/AWSSDK.IntegrationTests.SimpleSystemsManagement.NetFramework.csproj
index 51712dbb019b..63980e4aff0d 100644
--- a/sdk/test/Services/SimpleSystemsManagement/IntegrationTests/AWSSDK.IntegrationTests.SimpleSystemsManagement.NetFramework.csproj
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@@ -1,6 +1,6 @@
 <Project Sdk="Microsoft.NET.Sdk">
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diff --git a/sdk/test/Services/SimpleSystemsManagement/UnitTests/AWSSDK.UnitTests.SimpleSystemsManagement.NetFramework.csproj b/sdk/test/Services/SimpleSystemsManagement/UnitTests/AWSSDK.UnitTests.SimpleSystemsManagement.NetFramework.csproj
index 7ad298ea6474..0fc9cdf357a6 100644
--- a/sdk/test/Services/SimpleSystemsManagement/UnitTests/AWSSDK.UnitTests.SimpleSystemsManagement.NetFramework.csproj
+++ b/sdk/test/Services/SimpleSystemsManagement/UnitTests/AWSSDK.UnitTests.SimpleSystemsManagement.NetFramework.csproj
@@ -1,7 +1,7 @@
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   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);TRACE;BCL;ASYNC_AWAIT;DEBUG</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
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   <ItemGroup>
diff --git a/sdk/test/Services/SimpleWorkflow/IntegrationTests/AWSSDK.IntegrationTests.SimpleWorkflow.NetFramework.csproj b/sdk/test/Services/SimpleWorkflow/IntegrationTests/AWSSDK.IntegrationTests.SimpleWorkflow.NetFramework.csproj
index ebd652382ebc..8d07415ef087 100644
--- a/sdk/test/Services/SimpleWorkflow/IntegrationTests/AWSSDK.IntegrationTests.SimpleWorkflow.NetFramework.csproj
+++ b/sdk/test/Services/SimpleWorkflow/IntegrationTests/AWSSDK.IntegrationTests.SimpleWorkflow.NetFramework.csproj
@@ -1,6 +1,6 @@
 <Project Sdk="Microsoft.NET.Sdk">
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+    <TargetFramework>net472</TargetFramework>
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diff --git a/sdk/test/Services/SimpleWorkflow/UnitTests/AWSSDK.UnitTests.SimpleWorkflow.NetFramework.csproj b/sdk/test/Services/SimpleWorkflow/UnitTests/AWSSDK.UnitTests.SimpleWorkflow.NetFramework.csproj
index 5218d3485ea4..cbac60f0cffe 100644
--- a/sdk/test/Services/SimpleWorkflow/UnitTests/AWSSDK.UnitTests.SimpleWorkflow.NetFramework.csproj
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@@ -1,7 +1,7 @@
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-    <TargetFramework>net462</TargetFramework>
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     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
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+    <LangVersion>9.0</LangVersion>
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diff --git a/sdk/test/Services/SnowDeviceManagement/UnitTests/AWSSDK.UnitTests.SnowDeviceManagement.NetFramework.csproj b/sdk/test/Services/SnowDeviceManagement/UnitTests/AWSSDK.UnitTests.SnowDeviceManagement.NetFramework.csproj
index 13cd2426ef94..f3059e11e674 100644
--- a/sdk/test/Services/SnowDeviceManagement/UnitTests/AWSSDK.UnitTests.SnowDeviceManagement.NetFramework.csproj
+++ b/sdk/test/Services/SnowDeviceManagement/UnitTests/AWSSDK.UnitTests.SnowDeviceManagement.NetFramework.csproj
@@ -1,7 +1,7 @@
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    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
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     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
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+    <LangVersion>9.0</LangVersion>
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diff --git a/sdk/test/Services/Snowball/IntegrationTests/AWSSDK.IntegrationTests.Snowball.NetFramework.csproj b/sdk/test/Services/Snowball/IntegrationTests/AWSSDK.IntegrationTests.Snowball.NetFramework.csproj
index cbca9e73155f..3726740d20b2 100644
--- a/sdk/test/Services/Snowball/IntegrationTests/AWSSDK.IntegrationTests.Snowball.NetFramework.csproj
+++ b/sdk/test/Services/Snowball/IntegrationTests/AWSSDK.IntegrationTests.Snowball.NetFramework.csproj
@@ -1,6 +1,6 @@
 <Project Sdk="Microsoft.NET.Sdk">
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diff --git a/sdk/test/Services/Snowball/UnitTests/AWSSDK.UnitTests.Snowball.NetFramework.csproj b/sdk/test/Services/Snowball/UnitTests/AWSSDK.UnitTests.Snowball.NetFramework.csproj
index 676cdda7adbf..20ac09a8c4a0 100644
--- a/sdk/test/Services/Snowball/UnitTests/AWSSDK.UnitTests.Snowball.NetFramework.csproj
+++ b/sdk/test/Services/Snowball/UnitTests/AWSSDK.UnitTests.Snowball.NetFramework.csproj
@@ -1,7 +1,7 @@
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-    <TargetFramework>net462</TargetFramework>
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@@ -19,6 +19,7 @@
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+    <LangVersion>9.0</LangVersion>
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diff --git a/sdk/test/Services/SsmSap/UnitTests/AWSSDK.UnitTests.SsmSap.NetFramework.csproj b/sdk/test/Services/SsmSap/UnitTests/AWSSDK.UnitTests.SsmSap.NetFramework.csproj
index 6361a74f05e0..ac9d7c42ee04 100644
--- a/sdk/test/Services/SsmSap/UnitTests/AWSSDK.UnitTests.SsmSap.NetFramework.csproj
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@@ -1,7 +1,7 @@
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-    <TargetFramework>net462</TargetFramework>
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@@ -19,6 +19,7 @@
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+    <LangVersion>9.0</LangVersion>
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diff --git a/sdk/test/Services/StepFunctions/UnitTests/AWSSDK.UnitTests.StepFunctions.NetFramework.csproj b/sdk/test/Services/StepFunctions/UnitTests/AWSSDK.UnitTests.StepFunctions.NetFramework.csproj
index af6c0edd2710..d103b1d8a021 100644
--- a/sdk/test/Services/StepFunctions/UnitTests/AWSSDK.UnitTests.StepFunctions.NetFramework.csproj
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@@ -1,7 +1,7 @@
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@@ -19,6 +19,7 @@
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diff --git a/sdk/test/Services/StorageGateway/IntegrationTests/AWSSDK.IntegrationTests.StorageGateway.NetFramework.csproj b/sdk/test/Services/StorageGateway/IntegrationTests/AWSSDK.IntegrationTests.StorageGateway.NetFramework.csproj
index cf07d1a4818a..41687f71c1eb 100644
--- a/sdk/test/Services/StorageGateway/IntegrationTests/AWSSDK.IntegrationTests.StorageGateway.NetFramework.csproj
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@@ -1,6 +1,6 @@
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diff --git a/sdk/test/Services/StorageGateway/UnitTests/AWSSDK.UnitTests.StorageGateway.NetFramework.csproj b/sdk/test/Services/StorageGateway/UnitTests/AWSSDK.UnitTests.StorageGateway.NetFramework.csproj
index 47c6bd5c62bf..f7b50b906914 100644
--- a/sdk/test/Services/StorageGateway/UnitTests/AWSSDK.UnitTests.StorageGateway.NetFramework.csproj
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@@ -19,6 +19,7 @@
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+    <LangVersion>9.0</LangVersion>
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diff --git a/sdk/test/Services/SupplyChain/UnitTests/AWSSDK.UnitTests.SupplyChain.NetFramework.csproj b/sdk/test/Services/SupplyChain/UnitTests/AWSSDK.UnitTests.SupplyChain.NetFramework.csproj
index fd81d25a5b9b..2058094283c4 100644
--- a/sdk/test/Services/SupplyChain/UnitTests/AWSSDK.UnitTests.SupplyChain.NetFramework.csproj
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@@ -19,6 +19,7 @@
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+    <LangVersion>9.0</LangVersion>
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diff --git a/sdk/test/Services/SupportApp/UnitTests/AWSSDK.UnitTests.SupportApp.NetFramework.csproj b/sdk/test/Services/SupportApp/UnitTests/AWSSDK.UnitTests.SupportApp.NetFramework.csproj
index 4071a48561b9..40a803a6c068 100644
--- a/sdk/test/Services/SupportApp/UnitTests/AWSSDK.UnitTests.SupportApp.NetFramework.csproj
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+    <LangVersion>9.0</LangVersion>
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diff --git a/sdk/test/Services/Synthetics/UnitTests/AWSSDK.UnitTests.Synthetics.NetFramework.csproj b/sdk/test/Services/Synthetics/UnitTests/AWSSDK.UnitTests.Synthetics.NetFramework.csproj
index ac6a866e9dcf..e12cdaf78ca0 100644
--- a/sdk/test/Services/Synthetics/UnitTests/AWSSDK.UnitTests.Synthetics.NetFramework.csproj
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+    <LangVersion>9.0</LangVersion>
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diff --git a/sdk/test/Services/Textract/UnitTests/AWSSDK.UnitTests.Textract.NetFramework.csproj b/sdk/test/Services/Textract/UnitTests/AWSSDK.UnitTests.Textract.NetFramework.csproj
index 75ab645ebdd6..43d83dfd63ec 100644
--- a/sdk/test/Services/Textract/UnitTests/AWSSDK.UnitTests.Textract.NetFramework.csproj
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+    <LangVersion>9.0</LangVersion>
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diff --git a/sdk/test/Services/TimestreamInfluxDB/UnitTests/AWSSDK.UnitTests.TimestreamInfluxDB.NetFramework.csproj b/sdk/test/Services/TimestreamInfluxDB/UnitTests/AWSSDK.UnitTests.TimestreamInfluxDB.NetFramework.csproj
index 0570811b923a..dc3533b46c68 100644
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@@ -19,6 +19,7 @@
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diff --git a/sdk/test/Services/TimestreamQuery/UnitTests/AWSSDK.UnitTests.TimestreamQuery.NetFramework.csproj b/sdk/test/Services/TimestreamQuery/UnitTests/AWSSDK.UnitTests.TimestreamQuery.NetFramework.csproj
index fe31efb3f71e..84405fbf7f94 100644
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@@ -19,6 +19,7 @@
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+    <LangVersion>9.0</LangVersion>
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diff --git a/sdk/test/Services/TimestreamWrite/UnitTests/AWSSDK.UnitTests.TimestreamWrite.NetFramework.csproj b/sdk/test/Services/TimestreamWrite/UnitTests/AWSSDK.UnitTests.TimestreamWrite.NetFramework.csproj
index 8828ce9c81a5..d2b73c637018 100644
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+    <LangVersion>9.0</LangVersion>
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diff --git a/sdk/test/Services/Tnb/UnitTests/AWSSDK.UnitTests.Tnb.NetFramework.csproj b/sdk/test/Services/Tnb/UnitTests/AWSSDK.UnitTests.Tnb.NetFramework.csproj
index 50239b27a763..7fe81d74601d 100644
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@@ -19,6 +19,7 @@
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+    <LangVersion>9.0</LangVersion>
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diff --git a/sdk/test/Services/TranscribeService/UnitTests/AWSSDK.UnitTests.TranscribeService.NetFramework.csproj b/sdk/test/Services/TranscribeService/UnitTests/AWSSDK.UnitTests.TranscribeService.NetFramework.csproj
index e0031bb7175b..63a91b680d41 100644
--- a/sdk/test/Services/TranscribeService/UnitTests/AWSSDK.UnitTests.TranscribeService.NetFramework.csproj
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@@ -19,6 +19,7 @@
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diff --git a/sdk/test/Services/Transfer/UnitTests/AWSSDK.UnitTests.Transfer.NetFramework.csproj b/sdk/test/Services/Transfer/UnitTests/AWSSDK.UnitTests.Transfer.NetFramework.csproj
index 01b4aa7a859d..a8d8e857731a 100644
--- a/sdk/test/Services/Transfer/UnitTests/AWSSDK.UnitTests.Transfer.NetFramework.csproj
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@@ -19,6 +19,7 @@
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diff --git a/sdk/test/Services/Translate/UnitTests/AWSSDK.UnitTests.Translate.NetFramework.csproj b/sdk/test/Services/Translate/UnitTests/AWSSDK.UnitTests.Translate.NetFramework.csproj
index b1a882a24118..d9e17783c8cb 100644
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@@ -19,6 +19,7 @@
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diff --git a/sdk/test/Services/TrustedAdvisor/UnitTests/AWSSDK.UnitTests.TrustedAdvisor.NetFramework.csproj b/sdk/test/Services/TrustedAdvisor/UnitTests/AWSSDK.UnitTests.TrustedAdvisor.NetFramework.csproj
index 60472acad510..fcce6a24af02 100644
--- a/sdk/test/Services/TrustedAdvisor/UnitTests/AWSSDK.UnitTests.TrustedAdvisor.NetFramework.csproj
+++ b/sdk/test/Services/TrustedAdvisor/UnitTests/AWSSDK.UnitTests.TrustedAdvisor.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);TRACE;BCL;ASYNC_AWAIT;DEBUG</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CS1591,CS0612,CS0618</NoWarn>
   </PropertyGroup>
   <ItemGroup>
diff --git a/sdk/test/Services/UseServiceIdTestserviceId/AWSSDK.UseServiceIdTestserviceId.NetFramework.csproj b/sdk/test/Services/UseServiceIdTestserviceId/AWSSDK.UseServiceIdTestserviceId.NetFramework.csproj
index 20bf9cf85e6e..0f5335079351 100644
--- a/sdk/test/Services/UseServiceIdTestserviceId/AWSSDK.UseServiceIdTestserviceId.NetFramework.csproj
+++ b/sdk/test/Services/UseServiceIdTestserviceId/AWSSDK.UseServiceIdTestserviceId.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);BCL;AWS_ASYNC_API;CODE_ANALYSIS</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(RuleSetFileForBuild)' == 'false' Or '$(RuleSetFileForBuild)' == '' ">
diff --git a/sdk/test/Services/UseServiceIdTestserviceId/AWSSDK.UseServiceIdTestserviceId.NetStandard.csproj b/sdk/test/Services/UseServiceIdTestserviceId/AWSSDK.UseServiceIdTestserviceId.NetStandard.csproj
index 8a43e7d99f98..8d3629d9ffed 100644
--- a/sdk/test/Services/UseServiceIdTestserviceId/AWSSDK.UseServiceIdTestserviceId.NetStandard.csproj
+++ b/sdk/test/Services/UseServiceIdTestserviceId/AWSSDK.UseServiceIdTestserviceId.NetStandard.csproj
@@ -22,6 +22,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CA1822</NoWarn>
   </PropertyGroup>
   <!-- Async Enumerable Compatibility -->
diff --git a/sdk/test/Services/UseServiceIdTestserviceId/Generated/AmazonUseServiceIdTestserviceIdConfig.cs b/sdk/test/Services/UseServiceIdTestserviceId/Generated/AmazonUseServiceIdTestserviceIdConfig.cs
index b27dec6250a9..918fcc388448 100644
--- a/sdk/test/Services/UseServiceIdTestserviceId/Generated/AmazonUseServiceIdTestserviceIdConfig.cs
+++ b/sdk/test/Services/UseServiceIdTestserviceId/Generated/AmazonUseServiceIdTestserviceIdConfig.cs
@@ -34,7 +34,7 @@ namespace Amazon.UseServiceIdTestserviceId
     public partial class AmazonUseServiceIdTestserviceIdConfig : ClientConfig
     {
         private static readonly string UserAgentString =
-            InternalSDKUtils.BuildUserAgentString("Use Service Id Test - service Id", "3.3");
+            InternalSDKUtils.BuildUserAgentString("Use Service Id Test - service Id", "4.0");
 
 
         private string _userAgent = UserAgentString;
diff --git a/sdk/test/Services/UseServiceIdTestserviceId/Properties/AssemblyInfo.cs b/sdk/test/Services/UseServiceIdTestserviceId/Properties/AssemblyInfo.cs
index 775d9e616cdc..82974e269286 100644
--- a/sdk/test/Services/UseServiceIdTestserviceId/Properties/AssemblyInfo.cs
+++ b/sdk/test/Services/UseServiceIdTestserviceId/Properties/AssemblyInfo.cs
@@ -41,5 +41,9 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.3")]
-[assembly: AssemblyFileVersion("3.3")]
\ No newline at end of file
+#if BCL
+[assembly: AssemblyVersion("4.0")]
+#else
+[assembly: AssemblyVersion("4.0")]
+#endif
+[assembly: AssemblyFileVersion("4.0")]
\ No newline at end of file
diff --git a/sdk/test/Services/UseServiceIdTestserviceId/UnitTests/AWSSDK.UnitTests.UseServiceIdTestserviceId.NetFramework.csproj b/sdk/test/Services/UseServiceIdTestserviceId/UnitTests/AWSSDK.UnitTests.UseServiceIdTestserviceId.NetFramework.csproj
index 7a37ac9a22bc..ffdd60a22783 100644
--- a/sdk/test/Services/UseServiceIdTestserviceId/UnitTests/AWSSDK.UnitTests.UseServiceIdTestserviceId.NetFramework.csproj
+++ b/sdk/test/Services/UseServiceIdTestserviceId/UnitTests/AWSSDK.UnitTests.UseServiceIdTestserviceId.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);TRACE;BCL;ASYNC_AWAIT;DEBUG</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CS1591,CS0612,CS0618</NoWarn>
   </PropertyGroup>
   <ItemGroup>
diff --git a/sdk/test/Services/VPCLattice/UnitTests/AWSSDK.UnitTests.VPCLattice.NetFramework.csproj b/sdk/test/Services/VPCLattice/UnitTests/AWSSDK.UnitTests.VPCLattice.NetFramework.csproj
index f227f8e50109..7a78805cb807 100644
--- a/sdk/test/Services/VPCLattice/UnitTests/AWSSDK.UnitTests.VPCLattice.NetFramework.csproj
+++ b/sdk/test/Services/VPCLattice/UnitTests/AWSSDK.UnitTests.VPCLattice.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);TRACE;BCL;ASYNC_AWAIT;DEBUG</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CS1591,CS0612,CS0618</NoWarn>
   </PropertyGroup>
   <ItemGroup>
diff --git a/sdk/test/Services/VerifiedPermissions/UnitTests/AWSSDK.UnitTests.VerifiedPermissions.NetFramework.csproj b/sdk/test/Services/VerifiedPermissions/UnitTests/AWSSDK.UnitTests.VerifiedPermissions.NetFramework.csproj
index e6a12ba3817b..2b6b67ccc8ec 100644
--- a/sdk/test/Services/VerifiedPermissions/UnitTests/AWSSDK.UnitTests.VerifiedPermissions.NetFramework.csproj
+++ b/sdk/test/Services/VerifiedPermissions/UnitTests/AWSSDK.UnitTests.VerifiedPermissions.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);TRACE;BCL;ASYNC_AWAIT;DEBUG</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CS1591,CS0612,CS0618</NoWarn>
   </PropertyGroup>
   <ItemGroup>
diff --git a/sdk/test/Services/VoiceID/UnitTests/AWSSDK.UnitTests.VoiceID.NetFramework.csproj b/sdk/test/Services/VoiceID/UnitTests/AWSSDK.UnitTests.VoiceID.NetFramework.csproj
index 78afa2fa98e1..9a6c83c6162e 100644
--- a/sdk/test/Services/VoiceID/UnitTests/AWSSDK.UnitTests.VoiceID.NetFramework.csproj
+++ b/sdk/test/Services/VoiceID/UnitTests/AWSSDK.UnitTests.VoiceID.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);TRACE;BCL;ASYNC_AWAIT;DEBUG</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CS1591,CS0612,CS0618</NoWarn>
   </PropertyGroup>
   <ItemGroup>
diff --git a/sdk/test/Services/WAF/IntegrationTests/AWSSDK.IntegrationTests.WAF.NetFramework.csproj b/sdk/test/Services/WAF/IntegrationTests/AWSSDK.IntegrationTests.WAF.NetFramework.csproj
index 9101c46000b9..31ddd8befcc8 100644
--- a/sdk/test/Services/WAF/IntegrationTests/AWSSDK.IntegrationTests.WAF.NetFramework.csproj
+++ b/sdk/test/Services/WAF/IntegrationTests/AWSSDK.IntegrationTests.WAF.NetFramework.csproj
@@ -1,6 +1,6 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);DEBUG;TRACE;BCL;ASYNC_AWAIT;LOCAL_FILE</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>false</GenerateDocumentationFile>
diff --git a/sdk/test/Services/WAF/UnitTests/AWSSDK.UnitTests.WAF.NetFramework.csproj b/sdk/test/Services/WAF/UnitTests/AWSSDK.UnitTests.WAF.NetFramework.csproj
index 61c88b956a92..a9aca9da4fd0 100644
--- a/sdk/test/Services/WAF/UnitTests/AWSSDK.UnitTests.WAF.NetFramework.csproj
+++ b/sdk/test/Services/WAF/UnitTests/AWSSDK.UnitTests.WAF.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);TRACE;BCL;ASYNC_AWAIT;DEBUG</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CS1591,CS0612,CS0618</NoWarn>
   </PropertyGroup>
   <ItemGroup>
diff --git a/sdk/test/Services/WAFRegional/UnitTests/AWSSDK.UnitTests.WAFRegional.NetFramework.csproj b/sdk/test/Services/WAFRegional/UnitTests/AWSSDK.UnitTests.WAFRegional.NetFramework.csproj
index dd9e42937fca..58236d4ddd24 100644
--- a/sdk/test/Services/WAFRegional/UnitTests/AWSSDK.UnitTests.WAFRegional.NetFramework.csproj
+++ b/sdk/test/Services/WAFRegional/UnitTests/AWSSDK.UnitTests.WAFRegional.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);TRACE;BCL;ASYNC_AWAIT;DEBUG</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CS1591,CS0612,CS0618</NoWarn>
   </PropertyGroup>
   <ItemGroup>
diff --git a/sdk/test/Services/WAFV2/UnitTests/AWSSDK.UnitTests.WAFV2.NetFramework.csproj b/sdk/test/Services/WAFV2/UnitTests/AWSSDK.UnitTests.WAFV2.NetFramework.csproj
index 41e1af533975..08c03e63d85e 100644
--- a/sdk/test/Services/WAFV2/UnitTests/AWSSDK.UnitTests.WAFV2.NetFramework.csproj
+++ b/sdk/test/Services/WAFV2/UnitTests/AWSSDK.UnitTests.WAFV2.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);TRACE;BCL;ASYNC_AWAIT;DEBUG</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CS1591,CS0612,CS0618</NoWarn>
   </PropertyGroup>
   <ItemGroup>
diff --git a/sdk/test/Services/WellArchitected/UnitTests/AWSSDK.UnitTests.WellArchitected.NetFramework.csproj b/sdk/test/Services/WellArchitected/UnitTests/AWSSDK.UnitTests.WellArchitected.NetFramework.csproj
index e0221da8a1f2..31fe381b2b91 100644
--- a/sdk/test/Services/WellArchitected/UnitTests/AWSSDK.UnitTests.WellArchitected.NetFramework.csproj
+++ b/sdk/test/Services/WellArchitected/UnitTests/AWSSDK.UnitTests.WellArchitected.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);TRACE;BCL;ASYNC_AWAIT;DEBUG</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CS1591,CS0612,CS0618</NoWarn>
   </PropertyGroup>
   <ItemGroup>
diff --git a/sdk/test/Services/WorkDocs/UnitTests/AWSSDK.UnitTests.WorkDocs.NetFramework.csproj b/sdk/test/Services/WorkDocs/UnitTests/AWSSDK.UnitTests.WorkDocs.NetFramework.csproj
index 15acf04ccfa7..3db79c4523f8 100644
--- a/sdk/test/Services/WorkDocs/UnitTests/AWSSDK.UnitTests.WorkDocs.NetFramework.csproj
+++ b/sdk/test/Services/WorkDocs/UnitTests/AWSSDK.UnitTests.WorkDocs.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);TRACE;BCL;ASYNC_AWAIT;DEBUG</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CS1591,CS0612,CS0618</NoWarn>
   </PropertyGroup>
   <ItemGroup>
diff --git a/sdk/test/Services/WorkLink/UnitTests/AWSSDK.UnitTests.WorkLink.NetFramework.csproj b/sdk/test/Services/WorkLink/UnitTests/AWSSDK.UnitTests.WorkLink.NetFramework.csproj
index 0699fe3add42..8ac18203b9e7 100644
--- a/sdk/test/Services/WorkLink/UnitTests/AWSSDK.UnitTests.WorkLink.NetFramework.csproj
+++ b/sdk/test/Services/WorkLink/UnitTests/AWSSDK.UnitTests.WorkLink.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);TRACE;BCL;ASYNC_AWAIT;DEBUG</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CS1591,CS0612,CS0618</NoWarn>
   </PropertyGroup>
   <ItemGroup>
diff --git a/sdk/test/Services/WorkMail/UnitTests/AWSSDK.UnitTests.WorkMail.NetFramework.csproj b/sdk/test/Services/WorkMail/UnitTests/AWSSDK.UnitTests.WorkMail.NetFramework.csproj
index 48aff036949b..8995c5b2714c 100644
--- a/sdk/test/Services/WorkMail/UnitTests/AWSSDK.UnitTests.WorkMail.NetFramework.csproj
+++ b/sdk/test/Services/WorkMail/UnitTests/AWSSDK.UnitTests.WorkMail.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);TRACE;BCL;ASYNC_AWAIT;DEBUG</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CS1591,CS0612,CS0618</NoWarn>
   </PropertyGroup>
   <ItemGroup>
diff --git a/sdk/test/Services/WorkMailMessageFlow/UnitTests/AWSSDK.UnitTests.WorkMailMessageFlow.NetFramework.csproj b/sdk/test/Services/WorkMailMessageFlow/UnitTests/AWSSDK.UnitTests.WorkMailMessageFlow.NetFramework.csproj
index ea9c75486f84..7407c32379cc 100644
--- a/sdk/test/Services/WorkMailMessageFlow/UnitTests/AWSSDK.UnitTests.WorkMailMessageFlow.NetFramework.csproj
+++ b/sdk/test/Services/WorkMailMessageFlow/UnitTests/AWSSDK.UnitTests.WorkMailMessageFlow.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);TRACE;BCL;ASYNC_AWAIT;DEBUG</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CS1591,CS0612,CS0618</NoWarn>
   </PropertyGroup>
   <ItemGroup>
diff --git a/sdk/test/Services/WorkSpaces/UnitTests/AWSSDK.UnitTests.WorkSpaces.NetFramework.csproj b/sdk/test/Services/WorkSpaces/UnitTests/AWSSDK.UnitTests.WorkSpaces.NetFramework.csproj
index 58e6ff20c82a..a9f985e915d1 100644
--- a/sdk/test/Services/WorkSpaces/UnitTests/AWSSDK.UnitTests.WorkSpaces.NetFramework.csproj
+++ b/sdk/test/Services/WorkSpaces/UnitTests/AWSSDK.UnitTests.WorkSpaces.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);TRACE;BCL;ASYNC_AWAIT;DEBUG</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CS1591,CS0612,CS0618</NoWarn>
   </PropertyGroup>
   <ItemGroup>
diff --git a/sdk/test/Services/WorkSpacesThinClient/UnitTests/AWSSDK.UnitTests.WorkSpacesThinClient.NetFramework.csproj b/sdk/test/Services/WorkSpacesThinClient/UnitTests/AWSSDK.UnitTests.WorkSpacesThinClient.NetFramework.csproj
index 47669fa16b4a..6e6d42bd49fa 100644
--- a/sdk/test/Services/WorkSpacesThinClient/UnitTests/AWSSDK.UnitTests.WorkSpacesThinClient.NetFramework.csproj
+++ b/sdk/test/Services/WorkSpacesThinClient/UnitTests/AWSSDK.UnitTests.WorkSpacesThinClient.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);TRACE;BCL;ASYNC_AWAIT;DEBUG</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CS1591,CS0612,CS0618</NoWarn>
   </PropertyGroup>
   <ItemGroup>
diff --git a/sdk/test/Services/WorkSpacesWeb/UnitTests/AWSSDK.UnitTests.WorkSpacesWeb.NetFramework.csproj b/sdk/test/Services/WorkSpacesWeb/UnitTests/AWSSDK.UnitTests.WorkSpacesWeb.NetFramework.csproj
index d7210a854a27..23b78599b774 100644
--- a/sdk/test/Services/WorkSpacesWeb/UnitTests/AWSSDK.UnitTests.WorkSpacesWeb.NetFramework.csproj
+++ b/sdk/test/Services/WorkSpacesWeb/UnitTests/AWSSDK.UnitTests.WorkSpacesWeb.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);TRACE;BCL;ASYNC_AWAIT;DEBUG</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CS1591,CS0612,CS0618</NoWarn>
   </PropertyGroup>
   <ItemGroup>
diff --git a/sdk/test/Services/XRay/UnitTests/AWSSDK.UnitTests.XRay.NetFramework.csproj b/sdk/test/Services/XRay/UnitTests/AWSSDK.UnitTests.XRay.NetFramework.csproj
index e47ed03eec35..e8482d6451e6 100644
--- a/sdk/test/Services/XRay/UnitTests/AWSSDK.UnitTests.XRay.NetFramework.csproj
+++ b/sdk/test/Services/XRay/UnitTests/AWSSDK.UnitTests.XRay.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);TRACE;BCL;ASYNC_AWAIT;DEBUG</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CS1591,CS0612,CS0618</NoWarn>
   </PropertyGroup>
   <ItemGroup>
diff --git a/sdk/test/SmokeTests/AWSSDK.SmokeTests.NetFramework.csproj b/sdk/test/SmokeTests/AWSSDK.SmokeTests.NetFramework.csproj
index eb86ce561b44..5c076141a8e2 100644
--- a/sdk/test/SmokeTests/AWSSDK.SmokeTests.NetFramework.csproj
+++ b/sdk/test/SmokeTests/AWSSDK.SmokeTests.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
   <PropertyGroup>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);DEBUG;TRACE;BCL;ASYNC_AWAIT;LOCAL_FILE</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
diff --git a/sdk/test/TestAnalyzer/IntegrationTestsAnalyzer/IntegrationTestsAnalyzer.csproj b/sdk/test/TestAnalyzer/IntegrationTestsAnalyzer/IntegrationTestsAnalyzer.csproj
index 68054dd2e102..b506267e5f9c 100644
--- a/sdk/test/TestAnalyzer/IntegrationTestsAnalyzer/IntegrationTestsAnalyzer.csproj
+++ b/sdk/test/TestAnalyzer/IntegrationTestsAnalyzer/IntegrationTestsAnalyzer.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
     <TargetFramework Condition="'$(OS)' != 'Windows_NT'">netstandard2.0</TargetFramework>
-    <TargetFramework Condition="'$(OS)' == 'Windows_NT'">net462</TargetFramework>
+    <TargetFramework Condition="'$(OS)' == 'Windows_NT'">net472</TargetFramework>
     <AssemblyName>IntegrationTestsAnalyzer</AssemblyName>
     <RootNamespace>IntegrationTestsAnalyzer</RootNamespace>
     <GenerateAssemblyInfo>false</GenerateAssemblyInfo>
diff --git a/sdk/test/UnitTests/AWSSDK.UnitTests.Custom.NetFramework.csproj b/sdk/test/UnitTests/AWSSDK.UnitTests.Custom.NetFramework.csproj
index dd176f5be32f..bd5db3e194e3 100644
--- a/sdk/test/UnitTests/AWSSDK.UnitTests.Custom.NetFramework.csproj
+++ b/sdk/test/UnitTests/AWSSDK.UnitTests.Custom.NetFramework.csproj
@@ -6,7 +6,7 @@ This project file should not be used as part of a release pipeline.
 -->
 <Project Sdk="Microsoft.NET.Sdk">
     <PropertyGroup>
-        <TargetFramework>net462</TargetFramework>
+        <TargetFramework>net472</TargetFramework>
         <DefineConstants>$(DefineConstants);TRACE;BCL;ASYNC_AWAIT;DEBUG;AWS_ASYNC_API</DefineConstants>
         <DebugType>portable</DebugType>
         <GenerateDocumentationFile>true</GenerateDocumentationFile>
diff --git a/sdk/test/UnitTests/AWSSDK.UnitTests.NetFramework.csproj b/sdk/test/UnitTests/AWSSDK.UnitTests.NetFramework.csproj
index dca96f22cd90..2dc38ef6e3d9 100644
--- a/sdk/test/UnitTests/AWSSDK.UnitTests.NetFramework.csproj
+++ b/sdk/test/UnitTests/AWSSDK.UnitTests.NetFramework.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
    <RunAnalyzersDuringBuild Condition="'$(RunAnalyzersDuringBuild)'==''">true</RunAnalyzersDuringBuild>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);TRACE;BCL;ASYNC_AWAIT;DEBUG</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -19,6 +19,7 @@
     <SignAssembly>true</SignAssembly>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
+    <LangVersion>9.0</LangVersion>
     <NoWarn>CS1591,CS0612,CS0618</NoWarn>
   </PropertyGroup>
   <Choose>
diff --git a/sdk/test/UnitTests/Custom/AWSSDK.UnitTestUtilities.NetFramework.csproj b/sdk/test/UnitTests/Custom/AWSSDK.UnitTestUtilities.NetFramework.csproj
index a0f56ff9ba27..ccd47cf9dcee 100644
--- a/sdk/test/UnitTests/Custom/AWSSDK.UnitTestUtilities.NetFramework.csproj
+++ b/sdk/test/UnitTests/Custom/AWSSDK.UnitTestUtilities.NetFramework.csproj
@@ -1,6 +1,6 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
-    <TargetFramework>net462</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <DefineConstants>$(DefineConstants);DEBUG;TRACE;BCL;ASYNC_AWAIT;LOCAL_FILE</DefineConstants>
     <DebugType>portable</DebugType>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>