VSCode启动C# DevKit扩展时持续抛出URI格式异常求助

问题描述 #

每次启动安装了新版C# DevKit扩展的VSCode时，都会触发LimitedFunctionality异常，该异常会被重复记录3-4次，来源标注为DevKit。

异常详情 #

LimitedFunctionality
System.AggregateException: Project system data flow 'Workspace update handler ActionBlockSlimAsync`1' closed because of an exception: Invalid URI: The format of the URI could not be determined.. (Invalid URI: The format of the URI could not be determined.)
---> (Inner Exception #0) StreamJsonRpc.RemoteInvocationException: Invalid URI: The format of the URI could not be determined.
   at StreamJsonRpc.JsonRpc.InvokeCoreAsync[TResult](RequestId id, String targetName, IReadOnlyList`1 arguments, IReadOnlyList`1 positionalArgumentDeclaredTypes, IReadOnlyDictionary`2 namedArgumentDeclaredTypes, CancellationToken cancellationToken, Boolean isParameterObject)
   at Microsoft.VisualStudio.ProjectSystem.VSCode.LanguageServices.Workspace.<>c__DisplayClass45_1`1.<<OnProjectChangedAsync>g__ApplyInBatchAsync|1>d.MoveNext()
--- End of stack trace from previous location ---
   at Microsoft.VisualStudio.Threading.ReentrantSemaphore.StackSemaphore.<>c__DisplayClass3_0.<<ExecuteAsync>b__0>d.MoveNext()
--- End of stack trace from previous location ---
   at Microsoft.VisualStudio.Threading.ReentrantSemaphore.StackSemaphore.ExecuteAsync(Func`1 operation, CancellationToken cancellationToken)
   at Microsoft.VisualStudio.ProjectSystem.OnceInitializedOnceDisposedUnderLockAsync.ExecuteUnderLockCoreAsync(Func`2 action, CancellationToken cancellationToken)
   at Microsoft.VisualStudio.ProjectSystem.VSCode.LanguageServices.Workspace.OnBuildUpdateAsync(IProjectVersionedValue`1 update)
   at Microsoft.VisualStudio.ProjectSystem.VSCode.LanguageServices.Workspace.<>c__DisplayClass41_0.<<OnWorkspaceUpdateAsync>g__ApplyUpdateWithinLockAsync|1>d.MoveNext()
--- End of stack trace from previous location ---
   at Microsoft.VisualStudio.ProjectSystem.VSCode.LanguageServices.Workspace.<>c__DisplayClass41_0.<<OnWorkspaceUpdateAsync>g__ApplyUpdateWithinLockAsync|1>d.MoveNext()
--- End of stack trace from previous location ---
   at Microsoft.VisualStudio.ProjectSystem.VSCode.LanguageServices.Workspace.<>c__DisplayClass41_0.<<OnWorkspaceUpdateAsync>b__0>d.MoveNext()
--- End of stack trace from previous location ---
   at Microsoft.VisualStudio.Threading.ReentrantSemaphore.StackSemaphore.<>c__DisplayClass3_0.<<ExecuteAsync>b__0>d.MoveNext()
--- End of stack trace from previous location ---
   at Microsoft.VisualStudio.Threading.ReentrantSemaphore.StackSemaphore.ExecuteAsync(Func`1 operation, CancellationToken cancellationToken)
   at Microsoft.VisualStudio.ProjectSystem.OnceInitializedOnceDisposedUnderLockAsync.ExecuteUnderLockCoreAsync(Func`2 action, CancellationToken cancellationToken)
   at Microsoft.VisualStudio.ProjectSystem.DataReceivingBlockSlim`1.ProcessInputQueueAsync(InputDataBuffer inputQueue)
<--- (Inner Exception #0) 

解决思路 #

• 检查项目文件中的URI配置：异常提示URI格式错误，优先排查.csproj或.sln文件中是否存在格式不正确的URI（比如缺少协议头、路径格式错误的引用），尤其是自定义的PackageReference、ProjectReference或PublishProfile中的地址。
• 重置C# DevKit扩展状态：在VSCode中禁用并重新启用C# DevKit扩展，或者删除扩展的缓存目录（路径一般为%USERPROFILE%\.vscode\extensions\ms-dotnettools.cs-devkit-*，删除对应版本文件夹后重启VSCode）。
• 回退到C# DevKit旧版本：如果是新版扩展引入的问题，在VSCode扩展市场找到C# DevKit，点击右下角的“管理”按钮选择“安装另一个版本”，选择最近一个稳定版本尝试。
• 检查VSCode工作区配置：确认工作区的settings.json中是否存在与C#相关的错误配置，比如omnisharp.path或dotnet.server.path设置了无效路径。
• 修复.NET SDK环境：验证本地.NET SDK是否安装完整，运行dotnet --info检查版本和路径是否正常，必要时重新安装对应版本的SDK。

内容的提问来源于stack exchange，提问作者JayGlynn