Omnisharp can't find .NET SDK when open any C sharp project

Whenever I open any C sharp project no matter via VS code icon or terminal, it shows such error It was not possible to find any .NET SDKs. I am pretty sure I have SDK installed

I have tried to follow the wiki . Reinstall C sharp extension, reinstall SDK, reboot computer, export the /usr/local/share/dotnet/dotnet in ~/.bashrc, ~/.profile, ~/.zshrc. None of them work.

Environment data

dotnet --info output: .NET Core SDK (reflecting any global.json): Version: 3.1.401 Commit: 39d17847db

Runtime Environment: OS Name: Mac OS X OS Version: 10.15 OS Platform: Darwin RID: osx.10.15-x64 Base Path: /usr/local/share/dotnet/sdk/3.1.401/

Host (useful for support): Version: 3.1.7 Commit: fcfdef8d6b

.NET Core SDKs installed: 3.1.401 [/usr/local/share/dotnet/sdk]

.NET Core runtimes installed: Microsoft.AspNetCore.App 3.1.7 [/usr/local/share/dotnet/shared/Microsoft.AspNetCore.App] Microsoft.NETCore.App 3.1.7 [/usr/local/share/dotnet/shared/Microsoft.NETCore.App]

To install additional .NET Core runtimes or SDKs: https://aka.ms/dotnet-download

VS Code version: Version: 1.48.2

C# Extension version: v1.23.2

OmniSharp log

Starting OmniSharp server at 9/3/2020, 5:44:56 PM Target: /Users/jimmy/Desktop/cSharp

OmniSharp server started. Path: /Users/jimmy/.vscode/extensions/ms-dotnettools.csharp-1.23.2/.omnisharp/1.37.1/run PID: 1287

    Starting OmniSharp on MacOS 10.15.6 (x64)

    DotNetPath set to dotnet

    Located 1 MSBuild instance(s)
        1: StandAlone 16.8.0 - "/Users/jimmy/.vscode/extensions/ms-dotnettools.csharp-1.23.2/.omnisharp/1.37.1/omnisharp/.msbuild/Current/Bin"

    MSBUILD_EXE_PATH environment variable set to '/Users/jimmy/.vscode/extensions/ms-dotnettools.csharp-1.23.2/.omnisharp/1.37.1/omnisharp/.msbuild/Current/Bin/MSBuild.exe'

    Registered MSBuild instance: StandAlone 16.8.0 - "/Users/jimmy/.vscode/extensions/ms-dotnettools.csharp-1.23.2/.omnisharp/1.37.1/omnisharp/.msbuild/Current/Bin"
        CscToolExe = csc.exe
        MSBuildToolsPath = /Users/jimmy/.vscode/extensions/ms-dotnettools.csharp-1.23.2/.omnisharp/1.37.1/omnisharp/.msbuild/Current/Bin
        CscToolPath = /Users/jimmy/.vscode/extensions/ms-dotnettools.csharp-1.23.2/.omnisharp/1.37.1/omnisharp/.msbuild/Current/Bin/Roslyn
        BypassFrameworkInstallChecks = true
        MSBuildExtensionsPath = /Users/jimmy/.vscode/extensions/ms-dotnettools.csharp-1.23.2/.omnisharp/1.37.1/omnisharp/.msbuild

    Detecting Cake files in '/Users/jimmy/Desktop/cSharp'.

    Could not find any Cake files

    No solution files found in '/Users/jimmy/Desktop/cSharp'

    Queue project update for '/Users/jimmy/Desktop/cSharp/cSharp.csproj'

    Detecting CSX files in '/Users/jimmy/Desktop/cSharp'.

    Could not find any CSX files

    Invoking Workspace Options Provider: OmniSharp.Roslyn.CSharp.Services.CSharpFormattingWorkspaceOptionsProvider, Order: 0

    Loading project: /Users/jimmy/Desktop/cSharp/cSharp.csproj

    Invoking Workspace Options Provider: OmniSharp.Roslyn.CSharp.Services.Completion.CompletionOptionsProvider, Order: 0

    Invoking Workspace Options Provider: OmniSharp.Roslyn.CSharp.Services.RenameWorkspaceOptionsProvider, Order: 100

    Invoking Workspace Options Provider: OmniSharp.Roslyn.CSharp.Services.ImplementTypeWorkspaceOptionsProvider, Order: 110

    Invoking Workspace Options Provider: OmniSharp.Roslyn.CSharp.Services.BlockStructureWorkspaceOptionsProvider, Order: 140

    Configuration finished.

    Omnisharp server running using Stdio at location '/Users/jimmy/Desktop/cSharp' on host 1262.

It was not possible to find any installed .NET SDKs. Install a .NET SDK from: https://aka.ms/dotnet-download [warn]: OmniSharp.MSBuild.ProjectManager Failed to load project file ‘/Users/jimmy/Desktop/cSharp/cSharp.csproj’. /Users/jimmy/Desktop/cSharp/cSharp.csproj(1,1) Microsoft.Build.Exceptions.InvalidProjectFileException: The SDK ‘Microsoft.NET.Sdk’ specified could not be found. /Users/jimmy/Desktop/cSharp/cSharp.csproj at Microsoft.Build.Shared.ProjectErrorUtilities.ThrowInvalidProject (System.String errorSubCategoryResourceName, Microsoft.Build.Shared.IElementLocation elementLocation, System.String resourceName, System.Object[] args) [0x00040] in <4322d44f99c84aab9075efd37869f964>:0 at Microsoft.Build.Shared.ProjectErrorUtilities.VerifyThrowInvalidProject[T1] (System.Boolean condition, System.String errorSubCategoryResourceName, Microsoft.Build.Shared.IElementLocation elementLocation, System.String resourceName, T1 arg0) [0x00003] in <4322d44f99c84aab9075efd37869f964>:0 at Microsoft.Build.Shared.ProjectErrorUtilities.ThrowInvalidProject[T1] (Microsoft.Build.Shared.IElementLocation elementLocation, System.String resourceName, T1 arg0) [0x00000] in <4322d44f99c84aab9075efd37869f964>:0 at Microsoft.Build.Evaluation.Evaluator4[P,I,M,D].ExpandAndLoadImportsFromUnescapedImportExpressionConditioned (System.String directoryOfImportingFile, Microsoft.Build.Construction.ProjectImportElement importElement, System.Collections.Generic.List1[Microsoft.Build.Construction.ProjectRootElement]& projects, Microsoft.Build.BackEnd.SdkResolution.SdkResult& sdkResult, System.Boolean throwOnFileNotExistsError) [0x00309] in <4322d44f99c84aab9075efd37869f964>:0 at Microsoft.Build.Evaluation.Evaluator4[P,I,M,D].ExpandAndLoadImports (System.String directoryOfImportingFile, Microsoft.Build.Construction.ProjectImportElement importElement, Microsoft.Build.BackEnd.SdkResolution.SdkResult& sdkResult) [0x00027] in <4322d44f99c84aab9075efd37869f964>:0 at Microsoft.Build.Evaluation.Evaluator4[P,I,M,D].EvaluateImportElement (System.String directoryOfImportingFile, Microsoft.Build.Construction.ProjectImportElement importElement) [0x0000d] in <4322d44f99c84aab9075efd37869f964>:0 at Microsoft.Build.Evaluation.Evaluator4[P,I,M,D].PerformDepthFirstPass (Microsoft.Build.Construction.ProjectRootElement currentProjectOrImport) [0x000e6] in <4322d44f99c84aab9075efd37869f964>:0 at Microsoft.Build.Evaluation.Evaluator4[P,I,M,D].Evaluate () [0x0013c] in <4322d44f99c84aab9075efd37869f964>:0 at Microsoft.Build.Evaluation.Evaluator4[P,I,M,D].Evaluate (Microsoft.Build.Evaluation.IEvaluatorData4[P,I,M,D] data, Microsoft.Build.Construction.ProjectRootElement root, Microsoft.Build.Evaluation.ProjectLoadSettings loadSettings, System.Int32 maxNodeCount, Microsoft.Build.Collections.PropertyDictionary1[T] environmentProperties, Microsoft.Build.BackEnd.Logging.ILoggingService loggingService, Microsoft.Build.Evaluation.IItemFactory2[S,T] itemFactory, Microsoft.Build.Evaluation.IToolsetProvider toolsetProvider, Microsoft.Build.Evaluation.ProjectRootElementCacheBase projectRootElementCache, Microsoft.Build.Framework.BuildEventContext buildEventContext, Microsoft.Build.BackEnd.SdkResolution.ISdkResolverService sdkResolverService, System.Int32 submissionId, Microsoft.Build.Evaluation.Context.EvaluationContext evaluationContext, System.Boolean interactive) [0x00047] in <4322d44f99c84aab9075efd37869f964>:0 at Microsoft.Build.Evaluation.Project+ProjectImpl.Reevaluate (Microsoft.Build.BackEnd.Logging.ILoggingService loggingServiceForEvaluation, Microsoft.Build.Evaluation.ProjectLoadSettings loadSettings, Microsoft.Build.Evaluation.Context.EvaluationContext evaluationContext) [0x00063] in <4322d44f99c84aab9075efd37869f964>:0 at Microsoft.Build.Evaluation.Project+ProjectImpl.ReevaluateIfNecessary (Microsoft.Build.BackEnd.Logging.ILoggingService loggingServiceForEvaluation, Microsoft.Build.Evaluation.ProjectLoadSettings loadSettings, Microsoft.Build.Evaluation.Context.EvaluationContext evaluationContext) [0x00035] in <4322d44f99c84aab9075efd37869f964>:0 at Microsoft.Build.Evaluation.Project+ProjectImpl.ReevaluateIfNecessary (Microsoft.Build.BackEnd.Logging.ILoggingService loggingServiceForEvaluation, Microsoft.Build.Evaluation.Context.EvaluationContext evaluationContext) [0x00000] in <4322d44f99c84aab9075efd37869f964>:0 at Microsoft.Build.Evaluation.Project+ProjectImpl.ReevaluateIfNecessary (Microsoft.Build.Evaluation.Context.EvaluationContext evaluationContext) [0x00007] in <4322d44f99c84aab9075efd37869f964>:0 at Microsoft.Build.Evaluation.Project+ProjectImpl.Initialize (System.Collections.Generic.IDictionary2[TKey,TValue] globalProperties, System.String toolsVersion, System.String subToolsetVersion, Microsoft.Build.Evaluation.ProjectLoadSettings loadSettings, Microsoft.Build.Evaluation.Context.EvaluationContext evaluationContext) [0x00127] in <4322d44f99c84aab9075efd37869f964>:0 at Microsoft.Build.Evaluation.Project..ctor (System.String projectFile, System.Collections.Generic.IDictionary2[TKey,TValue] globalProperties, System.String toolsVersion, System.String subToolsetVersion, Microsoft.Build.Evaluation.ProjectCollection projectCollection, Microsoft.Build.Evaluation.ProjectLoadSettings loadSettings, Microsoft.Build.Evaluation.Context.EvaluationContext evaluationContext) [0x00073] in <4322d44f99c84aab9075efd37869f964>:0 at Microsoft.Build.Evaluation.Project…ctor (System.String projectFile, System.Collections.Generic.IDictionary2[TKey,TValue] globalProperties, System.String toolsVersion, System.String subToolsetVersion, Microsoft.Build.Evaluation.ProjectCollection projectCollection, Microsoft.Build.Evaluation.ProjectLoadSettings loadSettings) [0x00000] in <4322d44f99c84aab9075efd37869f964>:0 at Microsoft.Build.Evaluation.Project..ctor (System.String projectFile, System.Collections.Generic.IDictionary2[TKey,TValue] globalProperties, System.String toolsVersion, Microsoft.Build.Evaluation.ProjectCollection projectCollection, Microsoft.Build.Evaluation.ProjectLoadSettings loadSettings) [0x00000] in <4322d44f99c84aab9075efd37869f964>:0 at Microsoft.Build.Evaluation.Project…ctor (System.String projectFile, System.Collections.Generic.IDictionary2[TKey,TValue] globalProperties, System.String toolsVersion, Microsoft.Build.Evaluation.ProjectCollection projectCollection) [0x00000] in <4322d44f99c84aab9075efd37869f964>:0 at Microsoft.Build.Evaluation.ProjectCollection.LoadProject (System.String fileName, System.Collections.Generic.IDictionary2[TKey,TValue] globalProperties, System.String toolsVersion) [0x000f7] in <4322d44f99c84aab9075efd37869f964>:0 at Microsoft.Build.Evaluation.ProjectCollection.LoadProject (System.String fileName, System.String toolsVersion) [0x00000] in <4322d44f99c84aab9075efd37869f964>:0 at OmniSharp.MSBuild.ProjectLoader.EvaluateProjectFileCore (System.String filePath, System.Collections.Generic.IReadOnlyDictionary2[TKey,TValue] projectConfigurationsInSolution) [0x00160] in <7e6cb753aca94549b693616e0e7d1016>:0 at OmniSharp.MSBuild.ProjectLoader.BuildProject (System.String filePath, System.Collections.Generic.IReadOnlyDictionary2[TKey,TValue] configurationsInSolution) [0x0000d] in <7e6cb753aca94549b693616e0e7d1016>:0 at OmniSharp.MSBuild.ProjectFile.ProjectFileInfo.Load (System.String filePath, OmniSharp.MSBuild.ProjectIdInfo projectIdInfo, OmniSharp.MSBuild.ProjectLoader loader, System.Guid sessionId, OmniSharp.Services.DotNetInfo dotNetInfo) [0x00023] in <7e6cb753aca94549b693616e0e7d1016>:0 at OmniSharp.MSBuild.ProjectManager+<>c__DisplayClass31_0.<LoadProject>b__0 () [0x00000] in <7e6cb753aca94549b693616e0e7d1016>:0 at (wrapper delegate-invoke) System.Func1[System.ValueTuple3[OmniSharp.MSBuild.ProjectFile.ProjectFileInfo,System.Collections.Immutable.ImmutableArray1[OmniSharp.MSBuild.Logging.MSBuildDiagnostic],OmniSharp.MSBuild.Notification.ProjectLoadedEventArgs]].invoke_TResult() at OmniSharp.MSBuild.ProjectManager.LoadOrReloadProject (System.String projectFilePath, System.Func1[TResult] loader) [0x0001b] in <7e6cb753aca94549b693616e0e7d1016>:0

    Attempted to update project that is not loaded: /Users/jimmy/Desktop/cSharp/cSharp.csproj

Steps to reproduce

Whenever open C sharp project from icon or terminal

Expected behavior

Able to pick such debugger tools

Actual behavior

[rezanikfal]

Sometimes the Visual Studio warning will still persist even after installing the .NET SDK. This is because a link/shortcut/alias needs to be created between the .NET executable install location and the Visual Studio path.

The executable was most likely installed in /usr/local/share/dotnet/dotnet. A symbolic link needs to be created to usr/local/bin for Visual Studio.

To create that link assuming the locations above use this in the Terminal:

$ ln -s /usr/local/share/dotnet/dotnet /usr/local/bin/

For Ubuntu & Snap use this instead:

$ sudo ln -s /snap/dotnet-sdk/current/dotnet /usr/local/bin/

[justinmchase]

I managed to resolve this by uninstalling dotnet via brew, breaking down and going to the website and just downloading and running that installer. Basically brew is somehow installing differently and its not properly tested by the omnisharp crew.