Update ManagedWinRTComponentCanBeReferenced test to Windows SDK 10.0.26100.0

[Copilot]

The ManagedWinRTComponentCanBeReferenced test was failing in CI due to missing Platform.xml for Windows SDK 10.0.19041.0.

Changes

• Updated TargetFrameworks from windows10.0.19041.0 to windows10.0.26100.0
• Updated CsWinRTWindowsMetadata property to match the new SDK version
• Removed explicit WindowsSdkPackageVersion property (no longer needed)

The newer SDK version should be available on CI infrastructure, allowing the test to pass.

Original prompt

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This section details on the original issue you should resolve

<issue_title>Skipped test: Microsoft.NET.Build.Tests.GivenThatWeWantToBuildAWindowsRuntimeComponent.ManagedWinRTComponentCanBeReferenced</issue_title>
<issue_description>Related: #51935
Related: #51934

Summary

This test was failing in the release/10.0.1xx and main branch for:

• FullFramework: windows (x64)
• TestBuild: windows (x64)

Error Log

[xUnit.net 00:00:16.42]     Microsoft.NET.Build.Tests.GivenThatWeWantToBuildAWindowsRuntimeComponent.ManagedWinRTComponentCanBeReferenced [FAIL]
[xUnit.net 00:00:16.42]       Expected value to be 0 because Expected command to pass but it did not.
[xUnit.net 00:00:16.42]       Working Directory:
[xUnit.net 00:00:16.42]       File Name: C:\h\w\A5D1090F\p\d\dotnet.exe
[xUnit.net 00:00:16.42]       Arguments: msbuild /t:Build C:\h\w\A5D1090F\t\dotnetSdkTests\ltosyl1k.kit\ManagedWinRTC---79256FB9\ConsoleApp\ConsoleApp.csproj /restore
[xUnit.net 00:00:16.42]       Exit Code: 1
[xUnit.net 00:00:16.42]       StdOut:
[xUnit.net 00:00:16.42]       MSBuild version 18.0.6+5ddd0ddc0 for .NET
[xUnit.net 00:00:16.42]         Determining projects to restore...
[xUnit.net 00:00:16.42]         Restored C:\h\w\A5D1090F\t\dotnetSdkTests\ltosyl1k.kit\ManagedWinRTC---79256FB9\ConsoleApp\ConsoleApp.csproj (in 3.71 sec).
Running C:\h\w\A5D1090F\p\d\dotnet.exe msbuild /t:Build C:\h\w\A5D1090F\t\dotnetSdkTests\ltosyl1k.kit\It_fails_when---0E5A998A\WinMDClasslibrary\WinMDClasslibrary.csproj /restore
[xUnit.net 00:00:16.42]         Restored C:\h\w\A5D1090F\t\dotnetSdkTests\ltosyl1k.kit\ManagedWinRTC---79256FB9\ManagedWinRTComponent\ManagedWinRTComponent.csproj (in 3.71 sec).
[xUnit.net 00:00:16.42]       C:\h\w\A5D1090F\p\d\sdk\10.0.102-ci\Sdks\Microsoft.NET.Sdk\targets\Microsoft.NET.RuntimeIdentifierInference.targets(351,5): message NETSDK1057: You are using a preview version of .NET. See: https://aka.ms/dotnet-support-policy [C:\h\w\A5D1090F\t\dotnetSdkTests\ltosyl1k.kit\ManagedWinRTC---79256FB9\ConsoleApp\ConsoleApp.csproj]
[xUnit.net 00:00:16.42]       EXEC : error : Could not read the Windows SDK's Platform.xml at C:\Program Files (x86)\Windows Kits\10\Platforms\UAP\10.0.19041.0\Platform.xml [C:\h\w\A5D1090F\t\dotnetSdkTests\ltosyl1k.kit\ManagedWinRTC---79256FB9\ManagedWinRTComponent\ManagedWinRTComponent.csproj]
[xUnit.net 00:00:16.42]       C:\h\w\A5D1090F\t\dotnetSdkTests\ltosyl1k.kit\.nuget\packages\microsoft.windows.cswinrt\2.1.1\build\Microsoft.Windows.CsWinRT.targets(290,5): error MSB3073: The command ""C:\h\w\A5D1090F\t\dotnetSdkTests\ltosyl1k.kit\.nuget\packages\microsoft.windows.cswinrt\2.1.1\cswinrt.exe" @"C:\h\w\A5D1090F\t\dotnetSdkTests\ltosyl1k.kit\ManagedWinRTC---79256FB9\ManagedWinRTComponent\obj\Debug\net10.0-windows10.0.19041.0\Generated Files\CsWinRT\cswinrt.rsp"" exited with code 1. [C:\h\w\A5D1090F\t\dotnetSdkTests\ltosyl1k.kit\ManagedWinRTC---79256FB9\ManagedWinRTComponent\ManagedWinRTComponent.csproj]
[xUnit.net 00:00:16.42]       StdErr:
[xUnit.net 00:00:16.42]       
[xUnit.net 00:00:16.42]       , but found 1 (difference of 1).
[xUnit.net 00:00:16.42]       Stack Trace:
[xUnit.net 00:00:16.43]            at FluentAssertions.Execution.LateBoundTestFramework.Throw(String message)
[xUnit.net 00:00:16.43]            at FluentAssertions.Execution.DefaultAssertionStrategy.HandleFailure(String message)
[xUnit.net 00:00:16.43]            at FluentAssertions.Execution.AssertionScope.AddPreFormattedFailure(String formattedFailureMessage)
[xUnit.net 00:00:16.43]            at FluentAssertions.Execution.AssertionChain.FailWith(Func`1 getFailureReason)
[xUnit.net 00:00:16.43]            at FluentAssertions.Execution.AssertionChain.FailWith(Func`1 getFailureReason)
[xUnit.net 00:00:16.43]            at FluentAssertions.Execution.AssertionChain.FailWith(String message, Object[] args)
[xUnit.net 00:00:16.43]            at FluentAssertions.Numeric.NumericAssertionsBase`3.Be(T expected, String because, Object[] becauseArgs)
[xUnit.net 00:00:16.43]         /_/test/Microsoft.NET.TestFramework/Assertions/CommandResultAssertions.cs(27,0): at Microsoft.NET.TestFramework.Assertions.CommandResultAssertions.Pass()
[xUnit.net 00:00:16.43]         /_/test/Microsoft.NET.Build.Tests/GivenThatWeWantToBuildAWindowsRuntimeComponent.cs(186,0): at Microsoft.NET.Build.Tests.GivenThatWeWantToBuildAWindowsRuntimeComponent.ManagedWinRTComponentCanBeReferenced()
[xUnit.net 00:00:16.43]            at System.RuntimeMethodHandle.InvokeMethod(ObjectHandleOnStack target, Void** arguments, ObjectHandleOnStack sig, BOOL isConstructor, ObjectHandleOnStack result)
[xUnit.net 00:00:16.43]            at System.Reflection.MethodBaseInvoker.InterpretedInvoke_Method(Object obj, IntPtr* args)
[xUnit.net 00:00:16.43]            at System.Reflection.MethodBaseInvoker.InvokeWithNoArgs(Object obj, BindingFlags invokeAttr)
[xUnit.net 00:00:16.43]       Output:
[xUnit...

</details>



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- Fixes dotnet/sdk#52032

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Pull request overview

This PR fixes the ManagedWinRTComponentCanBeReferenced test that was failing in CI due to missing Platform.xml for Windows SDK 10.0.19041.0. The test is updated to use Windows SDK 10.0.26100.0, which is available on CI infrastructure and already in use in other test files.

Key Changes:

• Updated Windows SDK version from 10.0.19041.0 to 10.0.26100.0 for both TargetFrameworks and CsWinRTWindowsMetadata properties
• Removed obsolete WindowsSdkPackageVersion property that was marked as temporary