System.TypeLoadException

Issue Description

System.TypeLoadException: Could not load type of field 'Microsoft.Extensions.Configuration.Json.JsonConfigurationFileParser:_context' (1) 

Steps to Reproduce

omnisharp instantly reports the issue when starting vscode or restarting omnisharp

OmniSharp log

Starting OmniSharp server at 2019-07-20, 11:07:12 a.m.
    Target: correct_path_to_sln (redacted)

OmniSharp server started with Mono 5.18.1.
    Path: /Users/keeganstothert/.vscode/extensions/ms-vscode.csharp-1.21.0/.omnisharp/1.34.0/omnisharp/OmniSharp.exe
    PID: 95137

System.TypeLoadException: Could not load type of field 'Microsoft.Extensions.Configuration.Json.JsonConfigurationFileParser:_context' (1) due to: Could not resolve type with token 01000018 from typeref (expected class 'System.Collections.Generic.Stack`1' in assembly 'netstandard, Version=2.0.0.0, Culture=neutral, PublicKeyToken=cc7b13ffcd2ddd51') assembly:netstandard, Version=2.0.0.0, Culture=neutral, PublicKeyToken=cc7b13ffcd2ddd51 type:System.Collections.Generic.Stack`1 member:(null)
  at Microsoft.Extensions.Configuration.FileConfigurationProvider.Load (System.Boolean reload) [0x0010b] in <5b0219d367fd4fd68bb5d8e979bb16b3>:0 
  at Microsoft.Extensions.Configuration.FileConfigurationProvider.Load () [0x00000] in <5b0219d367fd4fd68bb5d8e979bb16b3>:0 
  at Microsoft.Extensions.Configuration.ConfigurationRoot..ctor (System.Collections.Generic.IList`1[T] providers) [0x0003b] in <c58a7bdd3f5a468aa1ce25bba6f36889>:0 
  at Microsoft.Extensions.Configuration.ConfigurationBuilder.Build () [0x0003c] in <c58a7bdd3f5a468aa1ce25bba6f36889>:0 
  at OmniSharp.ConfigurationBuilder.Build () [0x00073] in <2a5906ca9ef7486cb9ec80794c73eb10>:0 
  at OmniSharp.Stdio.Driver.Program+<>c__DisplayClass0_1.<Main>b__1 () [0x000bc] in <8c5dac6e15f8406f96c0166019f5cce3>:0 
  at OmniSharp.CommandLineApplication+<>c__DisplayClass11_0.<OnExecute>b__0 () [0x0000b] in <2a5906ca9ef7486cb9ec80794c73eb10>:0 
  at McMaster.Extensions.CommandLineUtils.CommandLineApplication.Execute (System.String[] args) [0x00039] in <344a1e8cd6594b17b1e01f8df6ae8827>:0 
  at OmniSharp.CommandLineApplication.Execute (System.Collections.Generic.IEnumerable`1[T] args) [0x00042] in <2a5906ca9ef7486cb9ec80794c73eb10>:0 
  at OmniSharp.Stdio.Driver.Program+<>c__DisplayClass0_0.<Main>b__0 () [0x00028] in <8c5dac6e15f8406f96c0166019f5cce3>:0 
  at OmniSharp.HostHelpers.Start (System.Func`1[TResult] action) [0x0001c] in <2a5906ca9ef7486cb9ec80794c73eb10>:0 

[ERROR] Error: OmniSharp server load timed out. Use the 'omnisharp.projectLoadTimeout' setting to override the default delay (one minute).

C# log

empty

Environment information

VSCode version: 1.36.1 C# Extension: 1.21.0

Mono Information

OmniSharp using global mono :5.18.1

Dotnet Information

.NET Core SDK (reflecting any global.json): Version: 2.2.301 Commit: 70d6be0814

Runtime Environment: OS Name: Mac OS X OS Version: 10.14 OS Platform: Darwin RID: osx.10.14-x64 Base Path: /usr/local/share/dotnet/sdk/2.2.301/

Host (useful for support): Version: 3.0.0-preview6-27804-01 Commit: fdf81c6faf

.NET Core SDKs installed: 2.2.301 [/usr/local/share/dotnet/sdk]

.NET Core runtimes installed: Microsoft.AspNetCore.All 2.2.5 [/usr/local/share/dotnet/shared/Microsoft.AspNetCore.All] Microsoft.AspNetCore.All 2.2.6 [/usr/local/share/dotnet/shared/Microsoft.AspNetCore.All] Microsoft.AspNetCore.App 2.2.5 [/usr/local/share/dotnet/shared/Microsoft.AspNetCore.App] Microsoft.AspNetCore.App 2.2.6 [/usr/local/share/dotnet/shared/Microsoft.AspNetCore.App] Microsoft.AspNetCore.App 3.0.0-preview6.19307.2 [/usr/local/share/dotnet/shared/Microsoft.AspNetCore.App] Microsoft.NETCore.App 2.2.5 [/usr/local/share/dotnet/shared/Microsoft.NETCore.App] Microsoft.NETCore.App 2.2.6 [/usr/local/share/dotnet/shared/Microsoft.NETCore.App] Microsoft.NETCore.App 3.0.0-preview6-27804-01 [/usr/local/share/dotnet/shared/Microsoft.NETCore.App]

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

Visual Studio Code Extensions

Extension	Author	Version
atom-keybindings	ms-vscode	3.0.6
code-settings-sync	Shan	3.4.0
cpptools	ms-vscode	0.24.0
csharp	ms-vscode	1.21.0
es7-react-js-snippets	dsznajder	2.3.0
hide-gitignored	npxms	1.0.1
markdown-all-in-one	yzhang	2.4.0
Material-theme	zhuangtongfa	2.26.0
msbuild-project-tools	tintoy	0.2.55
prettier-vscode	esbenp	1.9.0
python	ms-python	2019.6.24221
restructuredtext	lextudio	113.0.0
rust	rust-lang	0.6.1
unity-tools	Tobiah	1.1.1
vscode-apollo	apollographql	1.7.4
vscode-arduino	vsciot-vscode	0.2.27
vscode-eslint	dbaeumer	1.9.0
vscode-great-icons	emmanuelbeziat	2.1.47
vscode-styled-jsx	blanu	1.5.0
vscode-theme-onelight	akamud	2.1.0
vscode-typescript-tslint-plugin	ms-vscode	1.2.2
write-good-linter	travisthetechie	0.1.1

I have tried every step in all similar issues. I have uninstalled and reinstalled mono, unity, dotnet, and vscode. i’ve had similar issues with omnisharp in the past and was able to resolve them with some combination of the above and messing with “omnisharp.path”: “latest”, but this time nothing is working

[m1stermanager]

downgrading my c# extension to 1.20.0 fixed a similar issue for me on OSX… I was getting an error around System.TypeInitializationException: The type initializer for 'Microsoft.Build.Shared.NativeMethodsShared' threw an exception.

if it seems related enough to this I can re-upgrade and then capture the entire error message but I didn’t have to touch anything w/ mono directly to resolve. just downgrade from 1.20.1 -> 1.20.0

[pjangam]

Facing same error

Starting OmniSharp server at 3/8/2019, 5:26:12 PM
    Target: *************

OmniSharp server started with Mono 5.20.1.
    Path: /home/pramod/.vscode/extensions/ms-vscode.csharp-1.21.0/.omnisharp/1.34.0/omnisharp/OmniSharp.exe
    PID: 5703

System.TypeInitializationException: The type initializer for 'OmniSharp.MSBuild.Discovery.MSBuildLocator' threw an exception. ---> System.TypeLoadException: Could not find method '.ctor' due to a type load error: Could not load type of field 'System.Collections.Immutable.SortedInt32KeyNode`1+Enumerator[TValue]:s_enumeratingStacks' (0) due to: Could not resolve type with token 01000026 from typeref (expected class 'System.Collections.Generic.Stack`1' in assembly 'netstandard, Version=2.0.0.0, Culture=neutral, PublicKeyToken=cc7b13ffcd2ddd51') assembly:netstandard, Version=2.0.0.0, Culture=neutral, PublicKeyToken=cc7b13ffcd2ddd51 type:System.Collections.Generic.Stack`1 member:(null) assembly:/home/pramod/.vscode/extensions/ms-vscode.csharp-1.21.0/.omnisharp/1.34.0/omnisharp/System.Collections.Immutable.dll type:Enumerator member:(null)
  at System.Collections.Immutable.ImmutableHashSet`1[T].GetEnumerator () [0x00000] in <6518d0e60ca84f6b915c07341a031a32>:0 
  at System.Collections.Immutable.ImmutableExtensions.GetEnumerableDisposable[T,TEnumerator] (System.Collections.Generic.IEnumerable`1[T] enumerable) [0x00015] in <6518d0e60ca84f6b915c07341a031a32>:0 
  at System.Collections.Immutable.ImmutableHashSet`1[T].Union (System.Collections.Generic.IEnumerable`1[T] other, System.Collections.Immutable.ImmutableHashSet`1+MutationInput[T] origin) [0x00015] in <6518d0e60ca84f6b915c07341a031a32>:0 
  at System.Collections.Immutable.ImmutableHashSet`1[T].Union (System.Collections.Generic.IEnumerable`1[T] items, System.Boolean avoidWithComparer) [0x00034] in <6518d0e60ca84f6b915c07341a031a32>:0 
  at System.Collections.Immutable.ImmutableHashSet`1[T].WithComparer (System.Collections.Generic.IEqualityComparer`1[T] equalityComparer) [0x0001c] in <6518d0e60ca84f6b915c07341a031a32>:0 
  at System.Collections.Immutable.ImmutableHashSet.Create[T] (System.Collections.Generic.IEqualityComparer`1[T] equalityComparer, T[] items) [0x00000] in <6518d0e60ca84f6b915c07341a031a32>:0 
  at OmniSharp.MSBuild.Discovery.MSBuildLocator..cctor () [0x00005] in <3550ddd66d4043539c45cc4b41dec9dc>:0 
   --- End of inner exception stack trace ---
  at OmniSharp.CompositionHostBuilder+<>c__DisplayClass6_0.<CreateDefaultServiceProvider>b__0 (System.IServiceProvider sp) [0x0001c] in <3550ddd66d4043539c45cc4b41dec9dc>:0 
  at Microsoft.Extensions.DependencyInjection.ServiceLookup.CallSiteRuntimeResolver.VisitFactory (Microsoft.Extensions.DependencyInjection.ServiceLookup.FactoryCallSite factoryCallSite, Microsoft.Extensions.DependencyInjection.ServiceLookup.ServiceProviderEngineScope scope) [0x00006] in <824e19d8b53a48d8867d85feb58265d3>:0 
  at Microsoft.Extensions.DependencyInjection.ServiceLookup.CallSiteVisitor`2[TArgument,TResult].VisitCallSite (Microsoft.Extensions.DependencyInjection.ServiceLookup.IServiceCallSite callSite, TArgument argument) [0x0003a] in <824e19d8b53a48d8867d85feb58265d3>:0 
  at Microsoft.Extensions.DependencyInjection.ServiceLookup.CallSiteRuntimeResolver.VisitScoped (Microsoft.Extensions.DependencyInjection.ServiceLookup.ScopedCallSite scopedCallSite, Microsoft.Extensions.DependencyInjection.ServiceLookup.ServiceProviderEngineScope scope) [0x0002d] in <824e19d8b53a48d8867d85feb58265d3>:0 
  at Microsoft.Extensions.DependencyInjection.ServiceLookup.CallSiteRuntimeResolver.VisitSingleton (Microsoft.Extensions.DependencyInjection.ServiceLookup.SingletonCallSite singletonCallSite, Microsoft.Extensions.DependencyInjection.ServiceLookup.ServiceProviderEngineScope scope) [0x0000d] in <824e19d8b53a48d8867d85feb58265d3>:0 
  at Microsoft.Extensions.DependencyInjection.ServiceLookup.CallSiteVisitor`2[TArgument,TResult].VisitCallSite (Microsoft.Extensions.DependencyInjection.ServiceLookup.IServiceCallSite callSite, TArgument argument) [0x00072] in <824e19d8b53a48d8867d85feb58265d3>:0 
  at Microsoft.Extensions.DependencyInjection.ServiceLookup.CallSiteRuntimeResolver.Resolve (Microsoft.Extensions.DependencyInjection.ServiceLookup.IServiceCallSite callSite, Microsoft.Extensions.DependencyInjection.ServiceLookup.ServiceProviderEngineScope scope) [0x00000] in <824e19d8b53a48d8867d85feb58265d3>:0 
  at Microsoft.Extensions.DependencyInjection.ServiceLookup.DynamicServiceProviderEngine+<>c__DisplayClass1_0.<RealizeService>b__0 (Microsoft.Extensions.DependencyInjection.ServiceLookup.ServiceProviderEngineScope scope) [0x0003e] in <824e19d8b53a48d8867d85feb58265d3>:0 
  at Microsoft.Extensions.DependencyInjection.ServiceLookup.ServiceProviderEngine.GetService (System.Type serviceType, Microsoft.Extensions.DependencyInjection.ServiceLookup.ServiceProviderEngineScope serviceProviderEngineScope) [0x00032] in <824e19d8b53a48d8867d85feb58265d3>:0 
  at Microsoft.Extensions.DependencyInjection.ServiceLookup.ServiceProviderEngine.GetService (System.Type serviceType) [0x00008] in <824e19d8b53a48d8867d85feb58265d3>:0 
  at Microsoft.Extensions.DependencyInjection.ServiceProvider.GetService (System.Type serviceType) [0x00000] in <824e19d8b53a48d8867d85feb58265d3>:0 
  at Microsoft.Extensions.DependencyInjection.ServiceProviderServiceExtensions.GetRequiredService (System.IServiceProvider provider, System.Type serviceType) [0x00034] in <4b47b422bc4c4615bbdebe1df9b21b0d>:0 
  at Microsoft.Extensions.DependencyInjection.ServiceProviderServiceExtensions.GetRequiredService[T] (System.IServiceProvider provider) [0x0000e] in <4b47b422bc4c4615bbdebe1df9b21b0d>:0 
  at OmniSharp.CompositionHostBuilder.Build () [0x00082] in <3550ddd66d4043539c45cc4b41dec9dc>:0 
  at OmniSharp.Stdio.Host..ctor (System.IO.TextReader input, OmniSharp.Services.ISharedTextWriter writer, OmniSharp.IOmniSharpEnvironment environment, System.IServiceProvider serviceProvider, OmniSharp.CompositionHostBuilder compositionHostBuilder, Microsoft.Extensions.Logging.ILoggerFactory loggerFactory, System.Threading.CancellationTokenSource cancellationTokenSource) [0x00057] in <9d7bd3e1598f4afe8d6ee99159811c4c>:0 
  at OmniSharp.Stdio.Driver.Program+<>c__DisplayClass0_1.<Main>b__1 () [0x00138] in <5e7b0c1479c34220a9a8ec708a4cc365>:0 
  at OmniSharp.CommandLineApplication+<>c__DisplayClass11_0.<OnExecute>b__0 () [0x0000b] in <3550ddd66d4043539c45cc4b41dec9dc>:0 
  at McMaster.Extensions.CommandLineUtils.CommandLineApplication.Execute (System.String[] args) [0x00039] in <344a1e8cd6594b17b1e01f8df6ae8827>:0 
  at OmniSharp.CommandLineApplication.Execute (System.Collections.Generic.IEnumerable`1[T] args) [0x00042] in <3550ddd66d4043539c45cc4b41dec9dc>:0 
  at OmniSharp.Stdio.Driver.Program+<>c__DisplayClass0_0.<Main>b__0 () [0x00028] in <5e7b0c1479c34220a9a8ec708a4cc365>:0 
  at OmniSharp.HostHelpers.Start (System.Func`1[TResult] action) [0x0001c] in <3550ddd66d4043539c45cc4b41dec9dc>:0 

[ERROR] Error: OmniSharp server load timed out. Use the 'omnisharp.projectLoadTimeout' setting to override the default delay (one minute).