[NETSDKE2E][Green] The test explorer does not show UT test method.

[yinjiehe01]

REGRESSION INFO
This issue does not repro in C# Dev kit Jan Pre-release 2 1.92.5(C# 2.112.45)

INSTALL STEP
1.Install SDK 10.0.102 on Linux.
2.Install latest VS Code and C# dev kit Jan Pre-release 3 1.93.4 (C# 2.113.22) extension.

REPRO STEPS
1.Click the Create .NET Project button and select a UT test project.
2.Add the pass and failed code in UnitTest1.cs file, then build it in solution explorer.

Expected
The testing explorer shows all test cases.

Actual
The test explorer does not found UT test method.

[error] System.MissingMethodException: Method not found: 'Void Microsoft.TestPlatform.VsTestConsole.TranslationLayer.Interfaces.IVsTestConsoleWrapper.DiscoverTests(System.Collections.Generic.IEnumerable`1<System.String>, System.String, Microsoft.VisualStudio.TestPlatform.ObjectModel.Client.TestPlatformOptions, Microsoft.VisualStudio.TestPlatform.ObjectModel.Client.ITestDiscoveryEventsHandler2)'.
   at Microsoft.VisualStudio.TestWindow.Messaging.RemoteAgent.TestRunController.VsTestRunController.DiscoverTestsAsync(IEnumerable`1 sources, String launcherType, String launcherConfiguration, RunSettingsInfo runSettings, RemoteTestPlatformOptions remoteOptions, ITestRunDataSink dataSink, CancellationToken cancellationToken)
   at Microsoft.VisualStudio.TestWindow.Messaging.RemoteAgent.BaseTestAgentBridge.DiscoverTestsAsync(IEnumerable`1 sources, String launcherType, String launcherConfiguration, String discoverySettings, RemoteTestPlatformOptions options, CancellationToken cancellationToken)
   at Microsoft.VisualStudio.TestWindow.Host.TestPlatformProvider.DiscoverTestsAsync(DiscoverTestsRequest request, VsTestRunSession runSession, ImmutableDictionary`2 discoverSettingsMap, ImmutableArray`1 containersToDiscover, IEnumerable`1 activeEnvironments, CancellationToken cancellationToken)
2026-01-21 22:38:07.449 [info] ========== Test discovery aborted: 0 Tests found in 63.8 ms ==========
2026-01-21 22:38:09.230 [info] Tests are available, running test discovery: /home/nicole/TestProject1/TestProject1/bin/Debug/net10.0/TestProject1.dll
2026-01-21 22:38:09.231 [info] Scheduling discovery: /home/nicole/TestProject1/TestProject1/bin/Debug/net10.0/TestProject1.dll [Last modified: 1/21/2026, 10:38:06 PM]
2026-01-21 22:38:09.237 [info] No runSettingsPath configured. Falling back to default settings.

logs.zip

[jmlane-remsoft]

I'm seeing the same missing method exception on C# Dev Kit 1.93.4 on Windows 11 with SDKs 9.0.308 and 10.0.101 installed.

Rolling back to C# Dev Kit v1.90.2 works as expected.

[claudiaregio]

Thanks @jmlane-remsoft the team is looking into this now

[peterwald]

The fix for this has been merged.

[github-actions]

@yinjiehe01 @jmlane-remsoft @claudiaregio @peterwald @BearCarpenter @Wolffy101

A fix for this issue is now available in the next pre-releases of C#DK/C#. If you'd like to try out the fix, please see these instructions to update or try pre-release versions.

[yinjiehe01]

Not repro on C# dev kit Jan pre-release 3.2(RC) 1.93.20 (C# 2.114.6)

[claudiaregio]

Thank you @yinjiehe01!