Update test projects from net6.0 to net9.0

[Copilot]

.NET 6.0 reached end of support. This updates test projects to net9.0 for continued security and tooling support.

Changes

• Updated TargetFramework from net6.0 to net9.0 in:
  • TestSolution_NUnit_Tests.csproj
  • TestSolution_XUnit_Tests.csproj
  • TestSolution_MSTest_Tests.csproj
  • TestSolution_EdgeDriver_Tests.csproj

All existing package versions in Directory.Packages.props are already net9.0-compatible. The referenced TestSolution.csproj targets netstandard2.0 and requires no changes.

Warning

Firewall rules blocked me from connecting to one or more addresses (expand for details)

I tried to connect to the following addresses, but was blocked by firewall rules:

• dnceng.pkgs.visualstudio.com
  • Triggering command: /usr/bin/dotnet dotnet restore TestSolution.sln (dns block)
  • Triggering command: /usr/bin/dotnet dotnet build --no-restore (dns block)
  • Triggering command: /usr/bin/dotnet dotnet restore --configfile /tmp/NuGet.config (dns block)

If you need me to access, download, or install something from one of these locations, you can either:

• Configure Actions setup steps to set up my environment, which run before the firewall is enabled
• Add the appropriate URLs or hosts to the custom allowlist in this repository's Copilot coding agent settings (admins only)

Original prompt

Summary

Update all test projects that currently target net6.0 to target net9.0.

Files to Update

The following project files need their TargetFramework property changed from net6.0 to net9.0:

1. src/SourceBrowser/TestCode/TestSolution_NUnit_Tests/TestSolution_NUnit_Tests.csproj
2. src/SourceBrowser/TestCode/TestSolution_XUnit_Tests/TestSolution_XUnit_Tests.csproj
3. src/SourceBrowser/TestCode/TestSolution_MSTest_Tests/TestSolution_MSTest_Tests.csproj
4. src/SourceBrowser/TestCode/TestSolution_EdgeDriver_Tests/TestSolution_EdgeDriver_Tests.csproj

Required Change

In each file, change:

<TargetFramework>net6.0</TargetFramework>

to:

<TargetFramework>net9.0</TargetFramework>

Additional Considerations

• Ensure all NuGet package references (e.g., Microsoft.NET.Test.Sdk, NUnit3TestAdapter, xunit.runner.visualstudio, MSTest.TestAdapter, Selenium.WebDriver, coverlet.collector) are compatible with .NET 9. Update package versions if necessary.
• Check if TestSolution.csproj (referenced by all test projects) also needs to be updated to net9.0.
• Verify the solution builds and tests pass after the upgrade.

Context

.NET 6.0 has reached end of support. Upgrading to .NET 9.0 ensures the projects use a supported framework version with the latest security patches, performance improvements, and language features.

This pull request was created from Copilot chat.

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[radical]

Other projects are also net 8/9 right now, so I didn't move this to net10 either.

[joperezr]

Curious, why not net10?

[radical]

Other projects are also net 8/9 right now, so I didn't move this to net10 either. This would keep the changes limited.

Future PRs can move all the netX.0 projects to net10.0 .