Update Arcade MicrosoftTestingPlatformVersion to stable 2.4.0

[Copilot]

To double check:

• The right tests are in and the right validation has happened. Guidance: https://github.com/dotnet/arcade/blob/main/Documentation/Validation.md
• Description: Move Arcade’s MTP pin from 2.2.3 to released 2.4.0 in the two synchronized version definitions, so downstream cleanup tracked in dotnet/dotnet#8207 can proceed without preview/test-tools dependency assumptions.
• Changes
  • Version source of truth updates
    • src/Microsoft.DotNet.Arcade.Sdk/tools/DefaultVersions.props: MicrosoftTestingPlatformVersion → 2.4.0
    • Directory.Packages.props: synchronized override → 2.4.0
  • Synchronization scope
    • Kept xUnit/MTP dependency graph intact; no unrelated xUnit or tooling version changes.
  • Release/feed confirmation
    • Confirmed 2.4.0 availability for:
      • Microsoft.Testing.Platform
      • Microsoft.Testing.Platform.MSBuild
      • Microsoft.Testing.Extensions.TrxReport
    • Verified in both nuget.org and dotnet-public.
  • Upstream fix inclusion
    • Verified released line includes InvokeTestingPlatform apphost runtime selection behavior (DOTNET_ROOT_<ARCH> from DOTNET_HOST_PATH path).

<!-- before -->
<MicrosoftTestingPlatformVersion>2.2.3</MicrosoftTestingPlatformVersion>

<!-- after -->
<MicrosoftTestingPlatformVersion>2.4.0</MicrosoftTestingPlatformVersion>

[Copilot]

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[Copilot]

🔵 Needs a closer look

The xUnit V3 target uses this property for the VSTest adapter, so the dedicated runner-version property should be used before merging.

Review details

Suppressed comments (1)

src/Microsoft.DotNet.Arcade.Sdk/tools/DefaultVersions.props:89

• This property is also consumed by src/Microsoft.DotNet.Arcade.Sdk/tools/XUnitV3/XUnitV3.targets:25 as the xunit.runner.visualstudio version when UseVSTestRunner is enabled. Bumping it here therefore changes the VSTest adapter to 2.4.0 instead of the separately maintained XUnitRunnerVisualStudioVersion (4.0.0-pre.4), so an MTP-only update can select the wrong adapter for xUnit v3; make that target use the dedicated runner-version property before merging.

    <MicrosoftTestingPlatformVersion Condition="'$(MicrosoftTestingPlatformVersion)' == ''">2.4.0</MicrosoftTestingPlatformVersion>

• Files reviewed: 2/2 changed files
• Comments generated: 0 new
• Review effort level: Lite

[Copilot]

🟡 Changes recommended

The version property also unintentionally changes the xUnit Visual Studio runner through an incorrect existing reference.

Once you've addressed the issues Copilot identified, you can request another Copilot review.

Review details

• Files reviewed: 2/2 changed files
• Comments generated: 1
• Review effort level: Balanced

[akoeplinger]

@copilot address this comment

[Copilot]

Fixed in 9ebe7e2 — XUnitV3.targets now uses $(XUnitRunnerVisualStudioVersion) for xunit.runner.visualstudio instead of $(MicrosoftTestingPlatformVersion).

[Copilot]

🟢 Approval recommended

The synchronized version update and runner-reference correction are consistent and have no unresolved issues.

Review details

• Files reviewed: 3/3 changed files
• Comments generated: 0 new
• Review effort level: Balanced