[fix] Replace TestSDKAutoGeneratedCode with ExcludeFromCodeCoverage in auto-generated Program files

src/Microsoft.TestPlatform.ObjectModel/CodeCoverage/TestSDKAutoGeneratedCode.cs

@@ -2,13 +2,18 @@
 // Licensed under the MIT license. See LICENSE file in the project root for full license information.
 
 using System;
+using System.ComponentModel;
 
 namespace Microsoft.VisualStudio.TestPlatform;
 
 /// <summary>
-/// Only to be used to Test platform, to exclude auto generated code from CodeCoverage
+/// Only to be used by the Test platform, to exclude auto generated code from code coverage.
+/// New code should use <see cref="System.Diagnostics.CodeAnalysis.ExcludeFromCodeCoverageAttribute"/> instead;
+/// this attribute is retained only so that test assemblies built against older Microsoft.NET.Test.Sdk
+/// versions (which emit this attribute on the generated Main) continue to be excluded from code coverage.
 /// </summary>
 [AttributeUsage(AttributeTargets.All)]
+[EditorBrowsable(EditorBrowsableState.Never)]
 public class TestSDKAutoGeneratedCode : Attribute
 {
 }

src/package/Microsoft.NET.Test.Sdk/netcoreapp/Microsoft.NET.Test.Sdk.Program.cs

@@ -1,4 +1,3 @@
 // <auto-generated> This file has been auto generated. </auto-generated>
-using System;
-[Microsoft.VisualStudio.TestPlatform.TestSDKAutoGeneratedCode]
+[System.Diagnostics.CodeAnalysis.ExcludeFromCodeCoverage]
 class AutoGeneratedProgram {static void Main(string[] args){}}

src/package/Microsoft.NET.Test.Sdk/netcoreapp/Microsoft.NET.Test.Sdk.Program.fs

@@ -1,5 +1,5 @@
 // <auto-generated> This file has been auto generated. </auto-generated>
 module AutoGeneratedProgram
 [<EntryPoint>]
-[<Microsoft.VisualStudio.TestPlatform.TestSDKAutoGeneratedCode>]
+[<System.Diagnostics.CodeAnalysis.ExcludeFromCodeCoverage>]
 let main _ = 0

src/package/Microsoft.NET.Test.Sdk/netcoreapp/Microsoft.NET.Test.Sdk.Program.vb

@@ -1,8 +1,7 @@
 ' <auto-generated> This file has been auto generated. </auto-generated>
-Imports System
 Namespace Global
 Module __MicrosoftTestPlatformAutoGeneratedProgram
-<Microsoft.VisualStudio.TestPlatform.TestSDKAutoGeneratedCode>
+<System.Diagnostics.CodeAnalysis.ExcludeFromCodeCoverage>
 Sub Main(args As String())
 End Sub
 End Module

src/vstest.console/Processors/EnableCodeCoverageArgumentProcessor.cs

@@ -135,6 +135,9 @@ internal class EnableCodeCoverageArgumentExecutor : IArgumentExecutor
         @"                <Attribute>^System\.Diagnostics\.DebuggerHiddenAttribute$</Attribute>" + Environment.NewLine +
         @"                <Attribute>^System\.Diagnostics\.DebuggerNonUserCodeAttribute$</Attribute>" + Environment.NewLine +
         @"                <Attribute>^System\.Diagnostics\.CodeAnalysis\.ExcludeFromCodeCoverageAttribute$</Attribute>" + Environment.NewLine +
+        // Kept for back-compat: test assemblies built against older Microsoft.NET.Test.Sdk versions
+        // carry [TestSDKAutoGeneratedCode] on the auto-generated Main; newer SDK versions emit
+        // [ExcludeFromCodeCoverage] instead. Do not remove until those older assemblies are out of support.
         @"                <Attribute>^Microsoft\.VisualStudio\.TestPlatform\.TestSDKAutoGeneratedCode$</Attribute>" + Environment.NewLine +
         @"              </Exclude>" + Environment.NewLine +
         @"            </Attributes>" + Environment.NewLine +