Since I have updated Visual Studio 2019 to v16.10, I got an error when I try to create new project (WPF App C#, but others such as "Console app'" are working fine), and also I cannot open my projects.
Error is:
Project AAA could not be opened because the Visual C# 2019 language service could not be created. Error HRESULT E_FAIL has been returned from a call to a COM component.
ActivityLog (Inside AppData) after I tried to open my project:
Still unable to load MEF component DLL: Could not load file or assembly 'Microsoft.VisualStudio.LanguageServer.Protocol, Version=16.9.150.16657, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a' or one of its dependencies. The system cannot find the file specified. c:\program files (x86)\microsoft visual studio\2019\community\common7\ide\extensions\microsoft\liveshare.vscore\Microsoft.VisualStudio.LanguageServices.Remote.VSCore.dll
Still unable to load MEF component DLL: Could not load file or assembly 'Microsoft.VisualStudio.CppSvc.Internal, Version=16.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a' or one of its dependencies. The system cannot find the file specified. C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\Common7\IDE\CommonExtensions\Microsoft\CodeAnalysis\Microsoft.VisualStudio.CodeAnalysis.VCPlugin.dll
SetSite failed for package [CSharpPackage]Source: '' Description: Package 'RoslynPackage' failed to load. System.ArgumentException: Package 'RoslynPackage' failed to load.at Microsoft.VisualStudio.Shell.Interop.IVsTaskBody.DoWork(IVsTask pTask, UInt32 dwCount, IVsTask[] pParentTasks, Object& pResult)at Microsoft.VisualStudio.Services.VsTask.<>c__DisplayClass118_0.b__0(Task
1[] _)at Microsoft.VisualStudio.Services.VsTask.<>c__DisplayClass119_0.<GetCallbackForSingleParent>b__0(Task1 internalTask)at System.Threading.Tasks.ContinuationResultTaskFromResultTask2.InnerInvoke()at System.Threading.Tasks.Task.Execute() --- End of stack trace from previous location where exception was thrown --- at Microsoft.VisualStudio.Services.VsTask.RethrowException(AggregateException e)at Microsoft.VisualStudio.Services.VsTask.InternalGetResult(Boolean ignoreUIThreadCheck)at Microsoft.VisualStudio.Services.VsTask.GetResult() --- End of stack trace from previous location where exception was thrown --- at Microsoft.VisualStudio.Services.VsTask.RethrowException(AggregateException e)at Microsoft.VisualStudio.Services.VsTask.InternalGetResult(Boolean ignoreUIThreadCheck)at Microsoft.VisualStudio.Services.VsTask.GetResult()at Microsoft.Internal.VisualStudio.Shell.VsTaskAwaiter.GetResult()at Microsoft.VisualStudio.LanguageServices.Implementation.LanguageService.AbstractPackage2.d__5.MoveNext() --- End of stack trace from previous location where exception was thrown --- at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)at Microsoft.VisualStudio.LanguageServices.CSharp.LanguageService.CSharpPackage.d__2.MoveNext() --- End of stack trace from previous location where exception was thrown --- at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)at Microsoft.VisualStudio.Shell.AsyncPackage.<>c__DisplayClass20_0.<b__1>d.MoveNext() --- End of stack trace from previous location where exception was thrown ---at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)at Microsoft.VisualStudio.Shell.UIThreadReentrancyScope.WaitOnTaskCompleteInternal(Task task, CancellationToken cancel, Int32 ms)at Microsoft.VisualStudio.Services.VsTask.<>c__DisplayClass100_1.b__1()at Microsoft.VisualStudio.Services.VsTask.IgnoreObjectDisposedException(Action action)at Microsoft.VisualStudio.Services.VsTask.<>c__DisplayClass100_0.b__0()at Microsoft.VisualStudio.Services.VsTask.<>c__DisplayClass108_0.b__0()at Microsoft.VisualStudio.Services.VsTask.InvokeWithWaitDialog[T](Func`1 function)at Microsoft.VisualStudio.Services.VsTask.InvokeWithWaitDialog(Action action)at Microsoft.VisualStudio.Services.VsTask.InternalGetResult(Boolean ignoreUIThreadCheck)at Microsoft.VisualStudio.Services.VsTask.GetResult()SetSite failed for package [VisualBasicPackage]Source: 'Microsoft.VisualStudio.Shell.UI.Internal' Description: Error HRESULT E_FAIL has been returned from a call to a COM component. System.Runtime.InteropServices.COMException (0x80004005): Error HRESULT E_FAIL has been returned from a call to a COM component.at Microsoft.VisualStudio.Services.VsTask.RethrowException(AggregateException e)at Microsoft.VisualStudio.Services.VsTask.InternalGetResult(Boolean ignoreUIThreadCheck)at Microsoft.VisualStudio.Services.VsTask.GetResult()at Microsoft.Internal.VisualStudio.Shell.VsTaskAwaiter.GetResult()at Microsoft.VisualStudio.LanguageServices.Implementation.LanguageService.AbstractPackage
2.<InitializeAsync>d__5.MoveNext() --- End of stack trace from previous location where exception was thrown --- at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)at Microsoft.VisualStudio.LanguageServices.VisualBasic.VisualBasicPackage.VB$StateMachine_15_InitializeAsync.MoveNext() --- End of stack trace from previous location where exception was thrown --- at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)at Microsoft.VisualStudio.Shell.AsyncPackage.<>c__DisplayClass20_0.<<Microsoft-VisualStudio-Shell-Interop-IAsyncLoadablePackageInitialize-Initialize>b__1>d.MoveNext() --- End of stack trace from previous location where exception was thrown --- at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)at Microsoft.VisualStudio.Shell.UIThreadReentrancyScope.WaitOnTaskCompleteInternal(Task task, CancellationToken cancel, Int32 ms)at Microsoft.VisualStudio.Services.VsTask.<>c__DisplayClass100_1.<InternalGetResult>b__1()at Microsoft.VisualStudio.Services.VsTask.IgnoreObjectDisposedException(Action action)at Microsoft.VisualStudio.Services.VsTask.<>c__DisplayClass100_0.<InternalGetResult>b__0()at Microsoft.VisualStudio.Services.VsTask.<>c__DisplayClass108_0.<InvokeWithWaitDialog>b__0()at Microsoft.VisualStudio.Services.VsTask.InvokeWithWaitDialog[T](Func1 function)at Microsoft.VisualStudio.Services.VsTask.InvokeWithWaitDialog(Action action)at Microsoft.VisualStudio.Services.VsTask.InternalGetResult(Boolean ignoreUIThreadCheck)at Microsoft.VisualStudio.Services.VsTask.GetResult()
Tried many solutions, nothing works. Please help me! I'm frustrated.
(Tried to repair, reinstall, remove folders in Appdata (Roaming, Local..), open in safemode, reset settings, reload project, and more)
I have also tried what suggested here: https://docs.microsoft.com/en-us/answers/questions/394256/i-got-error-34the-39csharppackage39-package-did-no.html