Add $(LatestDotNetCoreForMSBuild) infrastructure for centralized framework targeting

[Copilot]

Context

This PR adds the $(LatestDotNetCoreForMSBuild) infrastructure that centralizes the target framework version across test infrastructure. This infrastructure provides a single source of truth for the latest .NET Core target framework, making it easier to update framework versions across all test projects and test code.

Changes Made

Build infrastructure:

• Added latestDotNetCoreForMSBuild parameter to BootstrapLocationAttribute
• Added _Parameter4 to Microsoft.Build.UnitTests.Shared.csproj to pass the latest .NET Core TFM
• Added LatestDotNetCoreForMSBuild property to RunnerUtilities for test access

Test code:

• Added -p:LatestDotNetCoreForMSBuild={RunnerUtilities.LatestDotNetCoreForMSBuild} to MSBuild command invocations in BuildCheck.UnitTests/EndToEndTests.cs (2 locations)
• Changed framework references to use RunnerUtilities.LatestDotNetCoreForMSBuild instead of hardcoded "net10.0" in:
  • Copy_Tests.cs (2 locations for path construction)
  • TerminalLogger_Tests.cs (1 test property)
• Added using Microsoft.Build.UnitTests.Shared; to Copy_Tests.cs for access to RunnerUtilities

Test assets:

• Changed <TargetFramework>net10.0</TargetFramework> to <TargetFramework>$(LatestDotNetCoreForMSBuild)</TargetFramework> in 8 test project files:
  • ExampleTask.csproj
  • TestNetTask.csproj
  • TestMSBuildTaskInNet.csproj
  • TestNetTaskWithImplicitParams.csproj
  • TaskHostLifecycleTestApp.csproj
  • CopyAlwaysTest/EntryProject.csproj
  • CopyAlwaysTest/ReferencedProject.csproj
  • EmbeddedResourceTest/EntryProject.csproj

Testing

Build succeeds. The infrastructure changes are tested through existing test suites that use the updated test assets.

Notes

The $(LatestDotNetCoreForMSBuild) infrastructure provides flexibility for future .NET version updates by centralizing the target framework definition. This avoids hardcoding "net10.0" throughout the test codebase and makes it easier to update to newer framework versions by changing the value in a single location (Directory.Build.props).

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[dotnet-policy-service]

Hello @@copilot, I noticed that you’re changing an .swr file or any file under src/Package/MSBuild.VSSetup.. Please make sure to validate this change by an experimental VS insertion. This is accomplished by pushing to an exp/* branch, which requires write permissions to this repo.

[YuliiaKovalova]

@copilot please use $(LatestDotNetCoreForMSBuild) I need this change and make main a target branch

[Copilot]

@copilot please use $(LatestDotNetCoreForMSBuild) I need this change and make main a target branch

I've restored the $(LatestDotNetCoreForMSBuild) infrastructure in commit fb9e1d8. The build succeeds with these changes.

Note: Changing the target branch from dev/ykovalova/app_host_support to main requires manual GitHub operation - I don't have the ability to change PR target branches programmatically. You'll need to update the target branch through the GitHub UI.

[YuliiaKovalova]

@copilot i updated target branch
please remove extra changes, only $(LatestDotNetCoreForMSBuild) should stay here

[Copilot]

@copilot i updated target branch
please remove extra changes, only $(LatestDotNetCoreForMSBuild) should stay here

I've removed all the app host support changes and kept only the $(LatestDotNetCoreForMSBuild) infrastructure in commit 623bc22.

However, I cannot push this cleaned version because the remote branch still contains all the old commits from dev/ykovalova/app_host_support. The branch needs to be force-pushed to replace the history. Since I don't have force-push permissions, could you either:

1. Force push my local branch, or
2. Delete the remote branch so I can push a clean version

The current local branch (copilot/sub-pr-13175) has exactly what you requested - only the $(LatestDotNetCoreForMSBuild) infrastructure with no app host support code.