OmniSharp stopped working after update to 1.19.0

Issue Description

After installing V1.19.0 of the C# extension, Omnisharp has stopped working in all my workspaces.

When looking at the Omnisharp log there are no visible errors, but it always seem to get stuck after the first Adding project ..../.../Project.csproj, no timeout or anything else comes after some time waiting.

I checked my .Net runtime version and it’s 4.7.2 (461814)

Steps to Reproduce

• Update 1.19.0 of the C# Extension was automatically installed by VSCode.

Expected Behavior

• Omnisharp and intellisense should keep working normally.

Actual Behavior

• Omnisharp does not load anymore.

Logs

OmniSharp log

Starting OmniSharp server at 2019-4-17 10:36:23 Target: c:\Users\xxx\Projects\xxx

OmniSharp server started. Path: C:\Users\xxx.vscode\extensions\ms-vscode.csharp-1.19.0.omnisharp\1.32.18\OmniSharp.exe PID: 8892

    Starting OmniSharp on Windows 6.2.9200.0 (x64)

    DotNetPath set to dotnet

    Located 2 MSBuild instance(s)
        1: Visual Studio Professional 2017 15.8.28010.2026 - "C:\Program Files (x86)\Microsoft Visual Studio\2017\Professional\MSBuild\15.0\Bin"
        2: StandAlone 15.0 - "C:\Users\xxx\.vscode\extensions\ms-vscode.csharp-1.19.0\.omnisharp\1.32.18\.msbuild\Current\Bin"

    Registered MSBuild instance: Visual Studio Professional 2017 15.8.28010.2026 - "C:\Program Files (x86)\Microsoft Visual Studio\2017\Professional\MSBuild\15.0\Bin"

    Detecting Cake files in 'c:\Users\xxx\Projects\xxx'.

    Could not find any Cake files

    Project system 'OmniSharp.DotNet.DotNetProjectSystem' is disabled in the configuration.

    No solution files found in 'c:\Users\xxx\Projects\xxx'

    Queue project update for 'c:\Users\xxx\Projects\xxx\src\Mod1\Mod1.csproj'

    Queue project update for 'c:\Users\xxx\Projects\xxx\src\Mod2\Mod2.csproj'

    Detecting CSX files in 'c:\Users\xxx\Projects\xxx'.

    Could not find any CSX files

    Invoking Workspace Options Provider: OmniSharp.Roslyn.CSharp.Services.CSharpWorkspaceOptionsProvider

    Loading project: c:\Users\xxx\Projects\xxx\src\Mod1\Mod1.csproj

    Configuration finished.

    Omnisharp server running using Stdio at location 'c:\Users\xxx\Projects\xxx' on host 19060.

    Successfully loaded project file 'c:\Users\xxx\Projects\xxx\src\Mod1\Mod1.csproj'.

    Adding project 'c:\Users\xxx\Projects\xxx\src\Mod1\Mod1.csproj'

C# log

Post the output from Output-->C# here

Environment information

VSCode version: 1.33.1 C# Extension: 1.19.0

Dotnet Information

.NET Core SDK (reflecting any global.json): Version: 2.1.402 Commit: 3599f217f4

Runtime Environment: OS Name: Windows OS Version: 10.0.17763 OS Platform: Windows RID: win10-x64 Base Path: C:\Program Files\dotnet\sdk\2.1.402\

Host (useful for support): Version: 2.1.4 Commit: 85255dde3e

.NET Core SDKs installed: 1.1.4 [C:\Program Files\dotnet\sdk] 2.1.302 [C:\Program Files\dotnet\sdk] 2.1.402 [C:\Program Files\dotnet\sdk]

.NET Core runtimes installed: Microsoft.AspNetCore.All 2.1.2 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.All] Microsoft.AspNetCore.All 2.1.4 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.All] Microsoft.AspNetCore.App 2.1.2 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.App] Microsoft.AspNetCore.App 2.1.4 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.App] Microsoft.NETCore.App 1.0.7 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App] Microsoft.NETCore.App 1.1.4 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App] Microsoft.NETCore.App 2.1.2 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App] Microsoft.NETCore.App 2.1.4 [C:\Program Files\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
beautify	HookyQR	1.4.11
code-settings-sync	Shan	3.2.8
csharp	ms-vscode	1.19.0
EditorConfig	EditorConfig	0.13.0
gitlens	eamodio	9.6.1
markdown-pdf	yzane	1.2.0
material-icon-theme	PKief	3.7.0
Material-theme	zhuangtongfa	2.21.0
mssql	ms-mssql	1.5.0
project-manager	alefragnani	10.5.1
python	ms-python	2019.3.6558
theme-dracula	dracula-theme	2.17.0
vim	vscodevim	1.4.0
vsc-material-facebook-theme	rmarganti	1.1.0
vsc-material-theme	Equinusocio	2.8.2
vscode-nuget-package-manager	jmrog	1.1.6
vsliveshare	ms-vsliveshare	1.0.45

Thanks

[mvalero]

@iSazonov FYI. I was able to downgrade using the built-in option in VSCode, right click on extension and “Install another version…”

[cjaeckel]

Exact same problem with ms-vscode.csharp 1.19.0 on Windows 10 .NET 4.7.2 (46184).

(Only a downgrade to 1.18 works…)