[BUG] Unexpected error while charging project in C# Dev Kit

[oscardsoto]

Describe the Issue

I got this log trying to run any of my C# projects on VSCode:

4/10/2024 14:14:17
LimitedFunctionality
System.AggregateException: Flujo de datos del sistema de proyectos "Workspace update handler 31752964" cerrado debido a una excepción: Object reference not set to an instance of an object. (Object reference not set to an instance of an object.)
---> (Inner Exception #0) StreamJsonRpc.RemoteInvocationException: Object reference not set to an instance of an object.
   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.Handlers.DynamicItemHandler.<>c__DisplayClass6_0.<<HandleProjectChangeAsync>g__ProcessAdditionsAsync|4>d.MoveNext()
--- End of stack trace from previous location ---
   at Microsoft.VisualStudio.ProjectSystem.VSCode.LanguageServices.Handlers.DynamicItemHandler.HandleProjectChangeAsync(IWorkspaceProject context, IComparable version, IProjectChangeDescription projectChange, ContextState state, ITelemetryOperation telemetryOperation, IManagedProjectDiagnosticOutputService logger)
   at Microsoft.VisualStudio.ProjectSystem.VSCode.LanguageServices.Handlers.DynamicItemHandler.HandleAsync(IWorkspaceProject context, IComparable version, IImmutableDictionary`2 projectChanges, ContextState state, ITelemetryOperation telemetryOperation, IManagedProjectDiagnosticOutputService logger)
   at Microsoft.VisualStudio.ProjectSystem.VSCode.LanguageServices.Workspace.<>c__DisplayClass43_1.<<OnEvaluationUpdateAsync>g__ProcessSourceItemsHandlersAsync|6>d.MoveNext()
--- End of stack trace from previous location ---
   at Microsoft.VisualStudio.ProjectSystem.VSCode.LanguageServices.Workspace.<>c__DisplayClass43_0.<<OnEvaluationUpdateAsync>g__ApplyProjectEvaluationAsync|2>d.MoveNext()
--- End of stack trace from previous location ---
   at Microsoft.VisualStudio.ProjectSystem.VSCode.LanguageServices.Workspace.<>c__DisplayClass46_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.OnEvaluationUpdateAsync(IProjectVersionedValue`1 evaluationUpdate)
   at Microsoft.VisualStudio.ProjectSystem.VSCode.LanguageServices.Workspace.<>c__DisplayClass42_0.<<OnWorkspaceUpdateAsync>g__ApplyUpdateWithinLockAsync|1>d.MoveNext()
--- End of stack trace from previous location ---
   at Microsoft.VisualStudio.ProjectSystem.VSCode.LanguageServices.Workspace.<>c__DisplayClass42_0.<<OnWorkspaceUpdateAsync>g__ApplyUpdateWithinLockAsync|1>d.MoveNext()
--- End of stack trace from previous location ---
   at Microsoft.VisualStudio.ProjectSystem.VSCode.LanguageServices.Workspace.<>c__DisplayClass42_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) 

I can't see the description, methods or attributes of any class:

The error ocurres on the C# Dev Kit, as this message indicates:

I try to reinstall the extension. Doesn't work.
I try to reinstall the extension (with C# ext as well). Doesn't work.
I try to reinstall VSCode. Doesn't work.
I clean the ext cache. Still doesn't work.

Steps To Reproduce

I notice that happens when I try to open a folder with my Blazor project (even if is a new one).

1. Create a new project ('cause is a Blazor project...)

.../your-folder: dotnet new blazor

2. Open the folder in VSCode:
3. Thust the authors

After a few seconds, the error should appear

Expected Behavior

This should not happen. The project should show the classes and its methods normally.

Environment Information

VSCode Version: 1.94.0
Commit: d78a74bcdfad14d5d3b1b782f87255d802b57511
Date: 2024-10-02T13:08:12.626Z
Electron: 30.5.1
ElectronBuildId: 10262041
Chromium: 124.0.6367.243
Node.js: 20.16.0
V8: 12.4.254.20-electron.0
OS: Linux x64 6.8.0-45-generic

Ubuntu: 22.04.1
DotNet Version: 8.0.108

C# Dev Kit extension version: v1.11.11 (pre-release)
C# extension version: v2.49.25 (pre-release)

[smitpatel]

cc: @dibarbet

[dibarbet]

Duplicate of #1470