无代码变更后单元测试意外失败：System.Management.ManagementException

未修改任何代码的情况下，执行单元测试时意外失败，抛出如下异常：

System.TypeInitializationException: The type initializer for 'DiffEngine.ProcessCleanup' threw an exception.

System.TypeInitializationException
The type initializer for 'DiffEngine.ProcessCleanup' threw an exception.
   at DiffEngine.ProcessCleanup.Kill(String command)
   at DiffEngine.DiffRunner.Kill(String tempFile, String targetFile) in C:\projects\diffengine\src\DiffEngine\DiffRunner_Kill.cs:line 32
   at VerifyEngine.ProcessEquals() in /_/src/Verify/Verifier/VerifyEngine.cs:line 179
   at VerifyEngine.ThrowIfRequired() in /_/src/Verify/Verifier/VerifyEngine.cs:line 119
   at InnerVerifier.VerifyInner(Object target, Func`1 cleanup, IEnumerable`1 targets) in /_/src/Verify/Verifier/InnerVerifier_Inner.cs:line 33
   at InnerVerifier.Verify[T](T target) in /_/src/Verify/Verifier/InnerVerifier_Json.cs:line 80
   at VerifyXunit.Verifier.<>c__DisplayClass1_0.<<Verify>b__0>d.MoveNext() in /_/src/Verify.Xunit/Verifier.cs:line 30
--- End of stack trace from previous location ---
   at Xunit.Sdk.TestInvoker`1.<>c__DisplayClass48_1.<<InvokeTestMethodAsync>b__1>d.MoveNext() in C:\Dev\xunit\xunit\src\xunit.execution\Sdk\Frameworks\Runners\TestInvoker.cs:line 264
--- End of stack trace from previous location ---
   at Xunit.Sdk.ExecutionTimer.AggregateAsync(Func`1 asyncAction) in C:\Dev\xunit\xunit\src\xunit.execution\Sdk\Frameworks\ExecutionTimer.cs:line 48
   at Xunit.Sdk.ExceptionAggregator.RunAsync(Func`1 code) in C:\Dev\xunit\xunit\src\xunit.core\Sdk\ExceptionAggregator.cs:line 90

System.Management.ManagementException
Ungültige Klasse 
   at System.Management.ManagementException.ThrowWithExtendedInfo(ManagementStatus errorCode)
   at System.Management.ManagementObjectCollection.ManagementObjectEnumerator.MoveNext()
   at WindowsProcess.FindAll()+MoveNext() in C:\projects\diffengine\src\DiffEngine\Process\WindowsProcess.cs:line 38
   at System.Collections.Generic.EnumerableHelpers.ToArray[T](IEnumerable`1 source, Int32& length)
   at System.Linq.OrderedEnumerable`1.ToList()
   at System.Linq.Enumerable.ToList[TSource](IEnumerable`1 source)
   at DiffEngine.ProcessCleanup.Refresh() in C:\projects\diffengine\src\DiffEngine\Process\ProcessCleanup.cs:line 36
   at DiffEngine.ProcessCleanup..cctor() in C:\projects\diffengine\src\DiffEngine\Process\ProcessCleanup.cs:line 30

• 重新安装.NET SDK和Rider
• 重新拉取项目master分支代码
• 确认团队其他成员的单元测试可正常运行

异常根源是System.Management.ManagementException: Ungültige Klasse（德语，意为“无效类”），说明DiffEngine通过WMI（Windows管理规范）查询Windows进程时，找不到对应WMI类，大概率是本地WMI存储库损坏或权限问题。

尝试以下解决步骤：

1. 修复WMI存储库
   以管理员身份打开命令提示符，执行命令：

   winmgmt /resetrepository
   

   该命令会重置WMI存储库，修复损坏的类定义。

2. 检查WMI服务状态
   打开服务管理器，找到Windows Management Instrumentation服务，确认其处于运行状态；若未运行，手动启动该服务。

3. 验证WMI类可用性
   运行wbemtest命令打开WMI测试工具：

   • 点击“连接”，命名空间输入root\cimv2，点击“连接”
   • 点击“查询”，输入SELECT * FROM Win32_Process，点击“应用”
     若能正常返回进程列表，说明WMI类正常；若报错，需进一步修复WMI。

4. 清理项目编译缓存
   删除项目目录下的bin和obj文件夹，重新生成项目，避免残留缓存影响测试运行。

5. 检查用户权限
   确保当前用户拥有访问WMI的权限，特别是读取Win32_Process类的权限。可通过组策略或WMI权限设置工具调整。

内容的提问来源于stack exchange，提问作者AnneTest123