[fail]: OmniSharp.MSBuild.ProjectManager Attempted to update project that is not loaded

Issue Description

I keep getting an error when loading my projects.

Steps to Reproduce

Launch the project/Start OmniSharp

Expected Behavior

Omnisharp loads the project correctly.

Actual Behavior

[fail]: OmniSharp.MSBuild.ProjectManager Attempted to update project that is not loaded: d:\Damian\Hakier\Csharp\Szachy\SzachyMulti\SzachyMulti.csproj error keeps appearing.

Logs

OmniSharp log

Starting OmniSharp server at 12.04.2020, 14:59:27 Target: d:\Damian\Hakier\Csharp\Szachy\SzachyMulti

OmniSharp server started. Path: C:\Users\Dom.vscode\extensions\ms-dotnettools.csharp-1.21.16.omnisharp\1.34.15\OmniSharp.exe PID: 4112

    Starting OmniSharp on Windows 6.1.7601.65536 (x64)

    DotNetPath set to dotnet

    Located 2 MSBuild instance(s)
        1: Visual Studio Build Tools 2019 16.5.30002.166 - "C:\Program Files (x86)\Microsoft Visual Studio\2019\BuildTools\MSBuild\Current\Bin"
        2: StandAlone 16.4 - "C:\Users\Dom\.vscode\extensions\ms-dotnettools.csharp-1.21.16\.omnisharp\1.34.15\.msbuild\Current\Bin"

    Registered MSBuild instance: Visual Studio Build Tools 2019 16.5.30002.166 - "C:\Program Files (x86)\Microsoft Visual Studio\2019\BuildTools\MSBuild\Current\Bin"

    Detecting Cake files in 'd:\Damian\Hakier\Csharp\Szachy\SzachyMulti'.

    Could not find any Cake files

    No solution files found in 'd:\Damian\Hakier\Csharp\Szachy\SzachyMulti'

    Queue project update for 'd:\Damian\Hakier\Csharp\Szachy\SzachyMulti\SzachyMulti.csproj'

    Detecting CSX files in 'd:\Damian\Hakier\Csharp\Szachy\SzachyMulti'.

    Could not find any CSX files

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

    Loading project: d:\Damian\Hakier\Csharp\Szachy\SzachyMulti\SzachyMulti.csproj

    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.EditorConfigWorkspaceOptionsProvider, Order: 200

    Configuration finished.

    Omnisharp server running using Stdio at location 'd:\Damian\Hakier\Csharp\Szachy\SzachyMulti' on host 3392.

    Failed to load project file 'd:\Damian\Hakier\Csharp\Szachy\SzachyMulti\SzachyMulti.csproj'.

d:\Damian\Hakier\Csharp\Szachy\SzachyMulti\SzachyMulti.csproj(1,1) Microsoft.Build.Exceptions.InvalidProjectFileException: Nie można znaleźć określonego zestawu SDK „Microsoft.NET.Sdk”. d:\Damian\Hakier\Csharp\Szachy\SzachyMulti\SzachyMulti.csproj w Microsoft.Build.Shared.ProjectErrorUtilities.ThrowInvalidProject(String errorSubCategoryResourceName, IElementLocation elementLocation, String resourceName, Object[] args) w Microsoft.Build.Evaluation.Evaluator4.ExpandAndLoadImportsFromUnescapedImportExpressionConditioned(String directoryOfImportingFile, ProjectImportElement importElement, List1& projects, SdkResult& sdkResult, Boolean throwOnFileNotExistsError) w Microsoft.Build.Evaluation.Evaluator4.ExpandAndLoadImports(String directoryOfImportingFile, ProjectImportElement importElement, SdkResult& sdkResult) w Microsoft.Build.Evaluation.Evaluator4.EvaluateImportElement(String directoryOfImportingFile, ProjectImportElement importElement) w Microsoft.Build.Evaluation.Evaluator4.PerformDepthFirstPass(ProjectRootElement currentProjectOrImport) w Microsoft.Build.Evaluation.Evaluator4.Evaluate(ILoggingService loggingService, BuildEventContext buildEventContext) w Microsoft.Build.Evaluation.Evaluator4.Evaluate(IEvaluatorData4 data, ProjectRootElement root, ProjectLoadSettings loadSettings, Int32 maxNodeCount, PropertyDictionary1 environmentProperties, ILoggingService loggingService, IItemFactory2 itemFactory, IToolsetProvider toolsetProvider, ProjectRootElementCacheBase projectRootElementCache, BuildEventContext buildEventContext, ISdkResolverService sdkResolverService, Int32 submissionId, EvaluationContext evaluationContext, Boolean interactive) w Microsoft.Build.Evaluation.Project.ProjectImpl.Reevaluate(ILoggingService loggingServiceForEvaluation, ProjectLoadSettings loadSettings, EvaluationContext evaluationContext) w Microsoft.Build.Evaluation.Project.ProjectImpl.ReevaluateIfNecessary(ILoggingService loggingServiceForEvaluation, ProjectLoadSettings loadSettings, EvaluationContext evaluationContext) w Microsoft.Build.Evaluation.Project.ProjectImpl.ReevaluateIfNecessary(EvaluationContext evaluationContext) w Microsoft.Build.Evaluation.Project.ProjectImpl.Initialize(IDictionary2 globalProperties, String toolsVersion, String subToolsetVersion, ProjectLoadSettings loadSettings, EvaluationContext evaluationContext) w Microsoft.Build.Evaluation.Project..ctor(String projectFile, IDictionary2 globalProperties, String toolsVersion, String subToolsetVersion, ProjectCollection projectCollection, ProjectLoadSettings loadSettings, EvaluationContext evaluationContext) w Microsoft.Build.Evaluation.ProjectCollection.LoadProject(String fileName, IDictionary2 globalProperties, String toolsVersion) w OmniSharp.MSBuild.ProjectLoader.EvaluateProjectFileCore(String filePath) w D:\a\1\s\src\OmniSharp.MSBuild\ProjectLoader.cs:wiersz 129 w OmniSharp.MSBuild.ProjectLoader.BuildProject(String filePath) w D:\a\1\s\src\OmniSharp.MSBuild\ProjectLoader.cs:wiersz 72 w OmniSharp.MSBuild.ProjectFile.ProjectFileInfo.Load(String filePath, ProjectIdInfo projectIdInfo, ProjectLoader loader) w D:\a\1\s\src\OmniSharp.MSBuild\ProjectFile\ProjectFileInfo.cs:wiersz 99 w OmniSharp.MSBuild.ProjectManager.LoadOrReloadProject(String projectFilePath, Func1 loader) w D:\a\1\s\src\OmniSharp.MSBuild\ProjectManager.cs:wiersz 308

    Attempted to update project that is not loaded: d:\Damian\Hakier\Csharp\Szachy\SzachyMulti\SzachyMulti.csproj</details>

C# log

Post the output from Output-->C# here

Environment information

VSCode version: 1.44.0 C# Extension: 1.21.16

Dotnet Information

Zestaw .NET Core SDK (odzwierciedlenie dowolnego pliku global.json): Version: 3.1.201 Commit: b1768b4ae7

�rodowisko uruchomieniowe: OS Name: Windows OS Version: 6.1.7601 OS Platform: Windows RID: win7-x64 Base Path: C:\Program Files\dotnet\sdk\3.1.201\

Host (useful for support): Version: 3.1.3 Commit: 4a9f85e9f8

.NET Core SDKs installed: 2.1.403 [C:\Program Files\dotnet\sdk] 3.1.101 [C:\Program Files\dotnet\sdk] 3.1.102 [C:\Program Files\dotnet\sdk] 3.1.201 [C:\Program Files\dotnet\sdk]

.NET Core runtimes installed: Microsoft.AspNetCore.All 2.1.5 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.All] Microsoft.AspNetCore.App 2.1.5 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.App] Microsoft.AspNetCore.App 3.1.2 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.App] Microsoft.AspNetCore.App 3.1.3 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.App] Microsoft.NETCore.App 2.1.5 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App] Microsoft.NETCore.App 3.1.2 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App] Microsoft.NETCore.App 3.1.3 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App] Microsoft.WindowsDesktop.App 3.1.2 [C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App] Microsoft.WindowsDesktop.App 3.1.3 [C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App]

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

Visual Studio Code Extensions

Extension	Author	Version
cpptools	ms-vscode	0.27.0
csharp	ms-dotnettools	1.21.16
dotenv	mikestead	1.0.1
ftp-simple	humy2833	0.7.5
glitch	glitch	0.1.6
jinja	wholroyd	0.0.8
npm-intellisense	christian-kohler	1.3.0
python	ms-python	2020.3.71659
python-extension-pack	donjayamanne	1.6.0
vscode-eslint	dbaeumer	2.1.2
vscode-icons	vscode-icons-team	10.1.1
vscode-language-babel	mgmcdermott	0.0.27
vscode-npm-script	eg2	0.3.11
vscode-nuget-package-manager	jmrog	1.1.6
vscode-pull-request-github	GitHub	0.15.0
vscodeintellicode	VisualStudioExptTeam	1.2.6

I tried to change version to 1.15.2 as suggested in #2509 however it doesn't solve the problem.

[cartermp]

Thanks for the report. Based on the log, this looks like a duplicate of this issue: https://github.com/OmniSharp/omnisharp-vscode/issues/3541

[Nekuskus]

After installing dotnet-sdk-3.1 on Fedora today I found vscode could not locate “Microsoft.NET.Sdk”. After trying numerous workarounds I created a ~/.omnisharp/omnisharp.json file as per omnisharp-roslyn#1313:

{
    "MsBuild": {
        "UseLegacySdkResolver": true
    }
}

and now it’s working fine

Sadly it doesn’t solve my issue (i’m on windows btw)