From 18eceff0d40259746a866eada2128f39410ef06f Mon Sep 17 00:00:00 2001
From: Luke Westendorf <lukewest@microsoft.com>
Date: Wed, 4 Feb 2026 16:38:48 -0800
Subject: [PATCH 01/10] Updating System.Collections.Immutable package reference
 to version 10.0.1

---
 eng/Versions.props | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/eng/Versions.props b/eng/Versions.props
index f61a4bd440..0c256572cd 100644
--- a/eng/Versions.props
+++ b/eng/Versions.props
@@ -65,7 +65,7 @@
     <MicrosoftVSSDKBuildToolsVersion>17.14.2119</MicrosoftVSSDKBuildToolsVersion>
     <MicrosoftWin32RegistryVersion>5.0.0</MicrosoftWin32RegistryVersion>
     <NewtonsoftJsonVersion>13.0.3</NewtonsoftJsonVersion>
-    <SystemCollectionsImmutableVersion>8.0.0</SystemCollectionsImmutableVersion>
+    <SystemCollectionsImmutableVersion>10.0.1</SystemCollectionsImmutableVersion>
     <SystemMemoryVersion>4.5.5</SystemMemoryVersion>
     <SystemReflectionMetadataVersion>8.0.0</SystemReflectionMetadataVersion>
     <TestPlatformExternalsVersion>18.0.0-preview-1-10911-061</TestPlatformExternalsVersion>

From 4635db318e35605b6f3a927b93ccbf1edc5cb007 Mon Sep 17 00:00:00 2001
From: Luke Westendorf <lukewest@microsoft.com>
Date: Wed, 4 Feb 2026 18:47:26 -0800
Subject: [PATCH 02/10] trigger GitHub actions


From 0278199492ee64464f4b1fb2e6c6cb66a79e6c36 Mon Sep 17 00:00:00 2001
From: Luke Westendorf <lukewest@microsoft.com>
Date: Thu, 5 Feb 2026 12:06:31 -0800
Subject: [PATCH 03/10] Updating binding redirect

---
 src/datacollector/app.config | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/datacollector/app.config b/src/datacollector/app.config
index 8e3b9f898c..7223a72d9a 100644
--- a/src/datacollector/app.config
+++ b/src/datacollector/app.config
@@ -26,7 +26,7 @@
       </dependentAssembly>
       <dependentAssembly>
         <assemblyIdentity name="System.Collections.Immutable" publicKeyToken="b03f5f7f11d50a3a" culture="neutral" />
-        <bindingRedirect oldVersion="1.0.0.0-8.0.0.0" newVersion="8.0.0.0" />
+        <bindingRedirect oldVersion="1.0.0.0-10.0.0.0" newVersion="10.0.0.0" />
       </dependentAssembly>
       <dependentAssembly>
         <assemblyIdentity name="System.Reflection.Metadata" publicKeyToken="b03f5f7f11d50a3a" culture="neutral" />

From 72c485c5077582e88dac08f010f9452a5dd08923 Mon Sep 17 00:00:00 2001
From: Luke Westendorf <lukewest@microsoft.com>
Date: Thu, 5 Feb 2026 16:09:00 -0800
Subject: [PATCH 04/10] Moving down to version 9.0.0

---
 eng/Versions.props           | 2 +-
 src/datacollector/app.config | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/eng/Versions.props b/eng/Versions.props
index 0c256572cd..d12915f174 100644
--- a/eng/Versions.props
+++ b/eng/Versions.props
@@ -65,7 +65,7 @@
     <MicrosoftVSSDKBuildToolsVersion>17.14.2119</MicrosoftVSSDKBuildToolsVersion>
     <MicrosoftWin32RegistryVersion>5.0.0</MicrosoftWin32RegistryVersion>
     <NewtonsoftJsonVersion>13.0.3</NewtonsoftJsonVersion>
-    <SystemCollectionsImmutableVersion>10.0.1</SystemCollectionsImmutableVersion>
+    <SystemCollectionsImmutableVersion>9.0.0</SystemCollectionsImmutableVersion>
     <SystemMemoryVersion>4.5.5</SystemMemoryVersion>
     <SystemReflectionMetadataVersion>8.0.0</SystemReflectionMetadataVersion>
     <TestPlatformExternalsVersion>18.0.0-preview-1-10911-061</TestPlatformExternalsVersion>
diff --git a/src/datacollector/app.config b/src/datacollector/app.config
index 7223a72d9a..f2cd37ec8f 100644
--- a/src/datacollector/app.config
+++ b/src/datacollector/app.config
@@ -26,7 +26,7 @@
       </dependentAssembly>
       <dependentAssembly>
         <assemblyIdentity name="System.Collections.Immutable" publicKeyToken="b03f5f7f11d50a3a" culture="neutral" />
-        <bindingRedirect oldVersion="1.0.0.0-10.0.0.0" newVersion="10.0.0.0" />
+        <bindingRedirect oldVersion="1.0.0.0-9.0.0.0" newVersion="10.0.0.0" />
       </dependentAssembly>
       <dependentAssembly>
         <assemblyIdentity name="System.Reflection.Metadata" publicKeyToken="b03f5f7f11d50a3a" culture="neutral" />

From b58313bacf6ff72e1dea7576063407680f3a13a5 Mon Sep 17 00:00:00 2001
From: nohwnd <me@jakubjares.com>
Date: Fri, 6 Feb 2026 08:42:50 +0100
Subject: [PATCH 05/10] Fix versions and redirects

---
 eng/Versions.props            | 2 +-
 src/datacollector/app.config  | 2 +-
 src/testhost.x86/app.config   | 2 +-
 src/vstest.console/app.config | 2 +-
 4 files changed, 4 insertions(+), 4 deletions(-)

diff --git a/eng/Versions.props b/eng/Versions.props
index d12915f174..0c256572cd 100644
--- a/eng/Versions.props
+++ b/eng/Versions.props
@@ -65,7 +65,7 @@
     <MicrosoftVSSDKBuildToolsVersion>17.14.2119</MicrosoftVSSDKBuildToolsVersion>
     <MicrosoftWin32RegistryVersion>5.0.0</MicrosoftWin32RegistryVersion>
     <NewtonsoftJsonVersion>13.0.3</NewtonsoftJsonVersion>
-    <SystemCollectionsImmutableVersion>9.0.0</SystemCollectionsImmutableVersion>
+    <SystemCollectionsImmutableVersion>10.0.1</SystemCollectionsImmutableVersion>
     <SystemMemoryVersion>4.5.5</SystemMemoryVersion>
     <SystemReflectionMetadataVersion>8.0.0</SystemReflectionMetadataVersion>
     <TestPlatformExternalsVersion>18.0.0-preview-1-10911-061</TestPlatformExternalsVersion>
diff --git a/src/datacollector/app.config b/src/datacollector/app.config
index f2cd37ec8f..7223a72d9a 100644
--- a/src/datacollector/app.config
+++ b/src/datacollector/app.config
@@ -26,7 +26,7 @@
       </dependentAssembly>
       <dependentAssembly>
         <assemblyIdentity name="System.Collections.Immutable" publicKeyToken="b03f5f7f11d50a3a" culture="neutral" />
-        <bindingRedirect oldVersion="1.0.0.0-9.0.0.0" newVersion="10.0.0.0" />
+        <bindingRedirect oldVersion="1.0.0.0-10.0.0.0" newVersion="10.0.0.0" />
       </dependentAssembly>
       <dependentAssembly>
         <assemblyIdentity name="System.Reflection.Metadata" publicKeyToken="b03f5f7f11d50a3a" culture="neutral" />
diff --git a/src/testhost.x86/app.config b/src/testhost.x86/app.config
index 61d2d0fa06..b4a59e462e 100644
--- a/src/testhost.x86/app.config
+++ b/src/testhost.x86/app.config
@@ -39,7 +39,7 @@
       </dependentAssembly>
       <dependentAssembly>
         <assemblyIdentity name="System.Collections.Immutable" publicKeyToken="b03f5f7f11d50a3a" culture="neutral" />
-        <bindingRedirect oldVersion="1.0.0.0-8.0.0.0" newVersion="8.0.0.0" />
+        <bindingRedirect oldVersion="1.0.0.0-10.0.0.0" newVersion="10.0.0.0" />
       </dependentAssembly>
       <dependentAssembly>
         <assemblyIdentity name="System.Reflection.Metadata" publicKeyToken="b03f5f7f11d50a3a" culture="neutral" />
diff --git a/src/vstest.console/app.config b/src/vstest.console/app.config
index 9132c7fde7..a322efc804 100644
--- a/src/vstest.console/app.config
+++ b/src/vstest.console/app.config
@@ -31,7 +31,7 @@
       </dependentAssembly>
       <dependentAssembly>
         <assemblyIdentity name="System.Collections.Immutable" publicKeyToken="b03f5f7f11d50a3a" culture="neutral" />
-        <bindingRedirect oldVersion="1.0.0.0-8.0.0.0" newVersion="8.0.0.0" />
+        <bindingRedirect oldVersion="1.0.0.0-10.0.0.0" newVersion="10.0.0.0" />
       </dependentAssembly>
       <dependentAssembly>
         <assemblyIdentity name="System.Reflection.Metadata" publicKeyToken="b03f5f7f11d50a3a" culture="neutral" />

From fcf1407b03ea8dfe4a8727d1ed2d8d6262397658 Mon Sep 17 00:00:00 2001
From: Luke Westendorf <lukewest@microsoft.com>
Date: Fri, 6 Feb 2026 09:55:42 -0800
Subject: [PATCH 06/10] Moving version back to 9.0.0

---
 eng/Versions.props            | 2 +-
 src/datacollector/app.config  | 2 +-
 src/testhost.x86/app.config   | 2 +-
 src/vstest.console/app.config | 2 +-
 4 files changed, 4 insertions(+), 4 deletions(-)

diff --git a/eng/Versions.props b/eng/Versions.props
index 0c256572cd..d12915f174 100644
--- a/eng/Versions.props
+++ b/eng/Versions.props
@@ -65,7 +65,7 @@
     <MicrosoftVSSDKBuildToolsVersion>17.14.2119</MicrosoftVSSDKBuildToolsVersion>
     <MicrosoftWin32RegistryVersion>5.0.0</MicrosoftWin32RegistryVersion>
     <NewtonsoftJsonVersion>13.0.3</NewtonsoftJsonVersion>
-    <SystemCollectionsImmutableVersion>10.0.1</SystemCollectionsImmutableVersion>
+    <SystemCollectionsImmutableVersion>9.0.0</SystemCollectionsImmutableVersion>
     <SystemMemoryVersion>4.5.5</SystemMemoryVersion>
     <SystemReflectionMetadataVersion>8.0.0</SystemReflectionMetadataVersion>
     <TestPlatformExternalsVersion>18.0.0-preview-1-10911-061</TestPlatformExternalsVersion>
diff --git a/src/datacollector/app.config b/src/datacollector/app.config
index 7223a72d9a..eb75311e99 100644
--- a/src/datacollector/app.config
+++ b/src/datacollector/app.config
@@ -26,7 +26,7 @@
       </dependentAssembly>
       <dependentAssembly>
         <assemblyIdentity name="System.Collections.Immutable" publicKeyToken="b03f5f7f11d50a3a" culture="neutral" />
-        <bindingRedirect oldVersion="1.0.0.0-10.0.0.0" newVersion="10.0.0.0" />
+        <bindingRedirect oldVersion="1.0.0.0-9.0.0.0" newVersion="9.0.0.0" />
       </dependentAssembly>
       <dependentAssembly>
         <assemblyIdentity name="System.Reflection.Metadata" publicKeyToken="b03f5f7f11d50a3a" culture="neutral" />
diff --git a/src/testhost.x86/app.config b/src/testhost.x86/app.config
index b4a59e462e..1ceed9a61a 100644
--- a/src/testhost.x86/app.config
+++ b/src/testhost.x86/app.config
@@ -39,7 +39,7 @@
       </dependentAssembly>
       <dependentAssembly>
         <assemblyIdentity name="System.Collections.Immutable" publicKeyToken="b03f5f7f11d50a3a" culture="neutral" />
-        <bindingRedirect oldVersion="1.0.0.0-10.0.0.0" newVersion="10.0.0.0" />
+        <bindingRedirect oldVersion="1.0.0.0-9.0.0.0" newVersion="9.0.0.0" />
       </dependentAssembly>
       <dependentAssembly>
         <assemblyIdentity name="System.Reflection.Metadata" publicKeyToken="b03f5f7f11d50a3a" culture="neutral" />
diff --git a/src/vstest.console/app.config b/src/vstest.console/app.config
index a322efc804..17aac52bd1 100644
--- a/src/vstest.console/app.config
+++ b/src/vstest.console/app.config
@@ -31,7 +31,7 @@
       </dependentAssembly>
       <dependentAssembly>
         <assemblyIdentity name="System.Collections.Immutable" publicKeyToken="b03f5f7f11d50a3a" culture="neutral" />
-        <bindingRedirect oldVersion="1.0.0.0-10.0.0.0" newVersion="10.0.0.0" />
+        <bindingRedirect oldVersion="1.0.0.0-9.0.0.0" newVersion="9.0.0.0" />
       </dependentAssembly>
       <dependentAssembly>
         <assemblyIdentity name="System.Reflection.Metadata" publicKeyToken="b03f5f7f11d50a3a" culture="neutral" />

From 1a1dfbaa9aa220a8285bb4ad8d7b284d0eb537a7 Mon Sep 17 00:00:00 2001
From: nohwnd <me@jakubjares.com>
Date: Thu, 12 Feb 2026 09:49:30 +0100
Subject: [PATCH 07/10] Update system.collections.immutable

---
 .../Microsoft.TestPlatform.CLI.csproj                          | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/src/package/Microsoft.TestPlatform.CLI/Microsoft.TestPlatform.CLI.csproj b/src/package/Microsoft.TestPlatform.CLI/Microsoft.TestPlatform.CLI.csproj
index 871ef099ab..2f08d810ae 100644
--- a/src/package/Microsoft.TestPlatform.CLI/Microsoft.TestPlatform.CLI.csproj
+++ b/src/package/Microsoft.TestPlatform.CLI/Microsoft.TestPlatform.CLI.csproj
@@ -82,6 +82,7 @@
     <PackageReference Include="Microsoft.Diagnostics.NETCore.Client" Version="$(MicrosoftDiagnosticsNETCoreClientVersion)" PrivateAssets="All" GeneratePathProperty="true" />
     <PackageReference Include="Microsoft.Internal.Dia" Version="$(TestPlatformMSDiaVersion)" PrivateAssets="All" GeneratePathProperty="true" Condition="'$(TargetFramework)'=='$(NetFrameworkRunnerTargetFramework)'" />
     <PackageReference Include="Newtonsoft.Json" Version="$(NewtonsoftJsonVersion)" GeneratePathProperty="true" Condition="'$(TargetFramework)' != 'NetFrameworkRunnerTargetFramework'" />
+    <PackageReference Include="System.Collections.Immutable" Version="$(SystemCollectionsImmutableVersion)" GeneratePathProperty="true" />
   </ItemGroup>
 
   <Target Name="CopyFiles" AfterTargets="Build">
@@ -93,6 +94,7 @@
       <MicrosoftInternalDia Include="$(PkgMicrosoft_Internal_Dia)\tools\netstandard\**\*"></MicrosoftInternalDia>
       <MicrosoftDiagnosticsNETCoreClient Include="$(PkgMicrosoft_Diagnostics_NETCore_Client)\lib\netstandard2.0\**\*"></MicrosoftDiagnosticsNETCoreClient>
       <MicrosoftInternalDia Include="$(PkgMicrosoft_Internal_Dia)\tools\net451\**\*"></MicrosoftInternalDia>
+      <SystemCollectionsImmutableFiles Include="$(PkgSystem_Collections_Immutable)\lib\netstandard2.0\*"></SystemCollectionsImmutableFiles>
     </ItemGroup>
 
     <Copy SourceFiles="@(MicrosoftCodeCoverageIO)" DestinationFiles="$(OutDir)\Microsoft.CodeCoverage.IO\%(RecursiveDir)%(Filename)%(Extension)" Condition="'$(DotNetBuildSourceOnly)' != 'true'" />
@@ -101,6 +103,7 @@
     <Copy SourceFiles="@(NewtonsoftJson)" DestinationFiles="$(OutDir)\Newtonsoft.Json\%(RecursiveDir)%(Filename)%(Extension)" />
     <Copy SourceFiles="@(MicrosoftDiagnosticsNETCoreClient)" DestinationFiles="$(OutDir)\Microsoft.Diagnostics.NETCore.Client\%(RecursiveDir)%(Filename)%(Extension)" />
     <Copy SourceFiles="@(MicrosoftInternalDia)" DestinationFiles="$(OutDir)\Microsoft.Internal.Dia\%(RecursiveDir)%(Filename)%(Extension)" />
+    <Copy SourceFiles="@(SystemCollectionsImmutableFiles)" DestinationFiles="$(OutDir)\%(RecursiveDir)%(Filename)%(Extension)" />
   </Target>
 
 </Project>

From 7e39636b17474a7d6864792a96f5b253ea6d35e6 Mon Sep 17 00:00:00 2001
From: Luke Westendorf <lukewest@microsoft.com>
Date: Wed, 18 Feb 2026 10:14:52 -0800
Subject: [PATCH 08/10] Setting NU1510 warning as message

---
 .../Microsoft.TestPlatform.CLI.csproj                           | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/src/package/Microsoft.TestPlatform.CLI/Microsoft.TestPlatform.CLI.csproj b/src/package/Microsoft.TestPlatform.CLI/Microsoft.TestPlatform.CLI.csproj
index 2f08d810ae..386c3cd4ae 100644
--- a/src/package/Microsoft.TestPlatform.CLI/Microsoft.TestPlatform.CLI.csproj
+++ b/src/package/Microsoft.TestPlatform.CLI/Microsoft.TestPlatform.CLI.csproj
@@ -36,6 +36,8 @@
       See https://github.com/NuGet/Home/issues/9147
     -->
     <MSBuildWarningsAsMessages>NU1702</MSBuildWarningsAsMessages>
+    <!-- PackageReference will not be pruned. Consider removing this package from your dependencies, as it is likely unnecessary. -->
+    <MSBuildWarningsAsMessages>$(MSBuildWarningsAsMessages);NU1510</MSBuildWarningsAsMessages>
   </PropertyGroup>
 
   <!-- runner and runner dependencies -->

From 0da140d93dbbeb1592b90183ac19b365572e565f Mon Sep 17 00:00:00 2001
From: Luke Westendorf <lukewest@microsoft.com>
Date: Wed, 18 Feb 2026 10:53:43 -0800
Subject: [PATCH 09/10] Moving suppression to NoWarn

---
 .../Microsoft.TestPlatform.CLI.csproj                         | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/package/Microsoft.TestPlatform.CLI/Microsoft.TestPlatform.CLI.csproj b/src/package/Microsoft.TestPlatform.CLI/Microsoft.TestPlatform.CLI.csproj
index 386c3cd4ae..696cb68cbf 100644
--- a/src/package/Microsoft.TestPlatform.CLI/Microsoft.TestPlatform.CLI.csproj
+++ b/src/package/Microsoft.TestPlatform.CLI/Microsoft.TestPlatform.CLI.csproj
@@ -31,13 +31,13 @@
     <ResolveAssemblyWarnOrErrorOnTargetArchitectureMismatch>None</ResolveAssemblyWarnOrErrorOnTargetArchitectureMismatch>
     <!-- NU5100: No dlls in lib folder -->
     <NoWarn>$(NoWarn);NU5100</NoWarn>
+    <!-- NU1510: PackageReference will not be pruned. Consider removing this package from your dependencies, as it is likely unnecessary. -->
+    <NoWarn>$(NoWarn);NU1510</NoWarn>
     <!--
       Sometimes NU1702 is not suppressed correctly, so force reducing severity of the warning.
       See https://github.com/NuGet/Home/issues/9147
     -->
     <MSBuildWarningsAsMessages>NU1702</MSBuildWarningsAsMessages>
-    <!-- PackageReference will not be pruned. Consider removing this package from your dependencies, as it is likely unnecessary. -->
-    <MSBuildWarningsAsMessages>$(MSBuildWarningsAsMessages);NU1510</MSBuildWarningsAsMessages>
   </PropertyGroup>
 
   <!-- runner and runner dependencies -->

From ace94049281eeabec4ad3907394e9a673d4d926e Mon Sep 17 00:00:00 2001
From: Luke Westendorf <lukewest@microsoft.com>
Date: Wed, 18 Feb 2026 11:51:33 -0800
Subject: [PATCH 10/10] Trigger build