Omnisharp-vscode: VSCode does not recognise .csproj files from unity projects

[vonbloom]

OmniSharp is not able to process .csproj files from Unity projects generated using Unity VSCode plugin,

Environment data

dotnet --info output:

.NET Command Line Tools (1.0.0-preview2-1-003177)

Product Information:
Version: 1.0.0-preview2-1-003177
Commit SHA-1 hash: a2df9c2576

Runtime Environment:
OS Name: ubuntu
OS Version: 16.04
OS Platform: Linux
RID: ubuntu.16.04-x64

VS Code version: 1.10.1

C# Extension version: 1.7.0

Steps to reproduce

Open a unity project in VSCode

Expected behavior

Dispose of all C# advanced tools like intellisense and others.

Actual behavior

OmniSharp fails to proces .csproj files and no advanced features are available.

...
[warn]: OmniSharp.MSBuild.MSBuildProjectSystem
        Failed to process project file '/path/to/project/Assembly-CSharp.csproj'.
...
[warn]: OmniSharp.MSBuild.MSBuildProjectSystem
        Failed to process project file '/path/to/project/Assembly-CSharp-Editor-firstpass.csproj'.
...
[info]: OmniSharp.Script.ScriptProjectSystem
        Detecting CSX files in '/path/to/project'.
[info]: OmniSharp.Script.ScriptProjectSystem
        Could not find any CSX files
[info]: OmniSharp.Startup
        Configuration finished.

[DustinCampbell]

Could you provide the full OmniSharp log rather than abbreviating it?

[vonbloom]

Full log output:

Starting OmniSharp server at 3/2/2017, 3:01:23 PM
    Target: /path/to/project/unity.sln

OmniSharp server started wth Mono
    Path: /path/to/.vscode/extensions/ms-vscode.csharp-1.7.0/bin/run
    PID: 5387

OmniSharp: -s /path/to/project/unity.sln --hostPID 5284 --stdio DotNet:enablePackageRestore=false --encoding utf-8 --loglevel information formattingOptions:useTabs=false formattingOptions:tabSize=4 formattingOptions:indentationSize=4
{"Event":"log","Body":{"LogLevel":"INFORMATION","Name":"OmniSharp.Startup","Message":"Omnisharp server running using Stdio at location '/path/to/project' on host 5284."},"Seq":1,"Type":"event"}
[info]: OmniSharp.DotNet.DotNetProjectSystem
        Initializing in /path/to/project
[info]: OmniSharp.DotNet.DotNetProjectSystem
        Auto package restore: False
[info]: OmniSharp.DotNet.DotNetProjectSystem
        Update workspace context
[info]: OmniSharp.DotNet.DotNetProjectSystem
        Resolving projects references
[info]: OmniSharp.MSBuild.MSBuildProjectSystem
        MSBUILD_EXE_PATH environment variable set to /path/to/.vscode/extensions/ms-vscode.csharp-1.7.0/bin/omnisharp/msbuild/MSBuild.dll
[info]: OmniSharp.MSBuild.MSBuildProjectSystem
        MSBuildExtensionsPath environment variable set to /path/to/.vscode/extensions/ms-vscode.csharp-1.7.0/bin/omnisharp/msbuild
[info]: OmniSharp.MSBuild.MSBuildProjectSystem
        MSBuildSDKsPath environment variable set to /path/to/.vscode/extensions/ms-vscode.csharp-1.7.0/bin/omnisharp/msbuild/Sdks
[info]: OmniSharp.MSBuild.MSBuildProjectSystem
        Detecting projects in '/path/to/project/unity.sln'.
[info]: OmniSharp.MSBuild.MSBuildProjectSystem
        Loading project from '/path/to/project/Assembly-CSharp.csproj'.
[warn]: OmniSharp.MSBuild.MSBuildProjectSystem
        Failed to process project file '/path/to/project/Assembly-CSharp.csproj'.
/path/to/project/Assembly-CSharp.csproj(1,1)
System.InvalidOperationException: The item metadata "%(FullPath)" cannot be applied to the path "//mscorlib.dll". UNC paths should be of the form \\server\share.
  at Microsoft.Build.Shared.ErrorUtilities.ThrowInvalidOperation (System.String resourceName, System.Object[] args) [0x00019] in <6a1392588f4a45bdbe07807130f9b3d0>:0 
  at Microsoft.Build.Shared.ErrorUtilities.VerifyThrowInvalidOperation (System.Boolean condition, System.String resourceName, System.Object arg0, System.Object arg1, System.Object arg2) [0x0000a] in <6a1392588f4a45bdbe07807130f9b3d0>:0 
  at Microsoft.Build.Shared.FileUtilities+ItemSpecModifiers.GetItemSpecModifier (System.String currentDirectory, System.String itemSpec, System.String definingProjectEscaped, System.String modifier, System.String& fullPath) [0x004f2] in <6a1392588f4a45bdbe07807130f9b3d0>:0 
  at Microsoft.Build.Evaluation.BuiltInMetadata.GetMetadataValueEscaped (System.String currentDirectory, System.String evaluatedIncludeBeforeWildcardExpansionEscaped, System.String evaluatedIncludeEscaped, System.String definingProjectEscaped, System.String name, System.String& fullPath) [0x0002e] in <6a1392588f4a45bdbe07807130f9b3d0>:0 
  at Microsoft.Build.Execution.ProjectItemInstance+TaskItem.GetBuiltInMetadataEscaped (System.String name) [0x00012] in <6a1392588f4a45bdbe07807130f9b3d0>:0 
  at Microsoft.Build.Execution.ProjectItemInstance+TaskItem.GetMetadataEscaped (System.String metadataName) [0x000ce] in <6a1392588f4a45bdbe07807130f9b3d0>:0 
  at Microsoft.Build.Execution.ProjectItemInstance+TaskItem.GetMetadata (System.String metadataName) [0x00001] in <6a1392588f4a45bdbe07807130f9b3d0>:0 
  at (wrapper remoting-invoke-with-check) Microsoft.Build.Execution.ProjectItemInstance+TaskItem:GetMetadata (string)
  at Microsoft.Build.Execution.ProjectItemInstance.GetMetadataValue (System.String name) [0x00001] in <6a1392588f4a45bdbe07807130f9b3d0>:0 
  at OmniSharp.MSBuild.ProjectFile.ProjectFileInfo.GetFullPaths (System.Collections.Generic.ICollection`1[T] items) [0x0001b] in <aca7f87b64bc414f95aff1158193a80c>:0 
  at OmniSharp.MSBuild.ProjectFile.ProjectFileInfo.Create (System.String projectFilePath, System.String solutionDirectory, Microsoft.Extensions.Logging.ILogger logger, OmniSharp.Options.MSBuildOptions options, System.Collections.Generic.ICollection`1[T] diagnostics, System.Boolean isUnityProject) [0x00309] in <aca7f87b64bc414f95aff1158193a80c>:0 
  at OmniSharp.MSBuild.MSBuildProjectSystem.CreateProjectFileInfo (System.String projectFilePath, System.Boolean isUnityProject) [0x0001f] in <aca7f87b64bc414f95aff1158193a80c>:0 

[info]: OmniSharp.MSBuild.MSBuildProjectSystem
        Loading project from '/path/to/project/Assembly-CSharp-Editor-firstpass.csproj'.
[warn]: OmniSharp.MSBuild.MSBuildProjectSystem
        Failed to process project file '/path/to/project/Assembly-CSharp-Editor-firstpass.csproj'.
/path/to/project/Assembly-CSharp-Editor-firstpass.csproj(1,1)
System.InvalidOperationException: The item metadata "%(FullPath)" cannot be applied to the path "//mscorlib.dll". UNC paths should be of the form \\server\share.
  at Microsoft.Build.Shared.ErrorUtilities.ThrowInvalidOperation (System.String resourceName, System.Object[] args) [0x00019] in <6a1392588f4a45bdbe07807130f9b3d0>:0 
  at Microsoft.Build.Shared.ErrorUtilities.VerifyThrowInvalidOperation (System.Boolean condition, System.String resourceName, System.Object arg0, System.Object arg1, System.Object arg2) [0x0000a] in <6a1392588f4a45bdbe07807130f9b3d0>:0 
  at Microsoft.Build.Shared.FileUtilities+ItemSpecModifiers.GetItemSpecModifier (System.String currentDirectory, System.String itemSpec, System.String definingProjectEscaped, System.String modifier, System.String& fullPath) [0x004f2] in <6a1392588f4a45bdbe07807130f9b3d0>:0 
  at Microsoft.Build.Evaluation.BuiltInMetadata.GetMetadataValueEscaped (System.String currentDirectory, System.String evaluatedIncludeBeforeWildcardExpansionEscaped, System.String evaluatedIncludeEscaped, System.String definingProjectEscaped, System.String name, System.String& fullPath) [0x0002e] in <6a1392588f4a45bdbe07807130f9b3d0>:0 
  at Microsoft.Build.Execution.ProjectItemInstance+TaskItem.GetBuiltInMetadataEscaped (System.String name) [0x00012] in <6a1392588f4a45bdbe07807130f9b3d0>:0 
  at Microsoft.Build.Execution.ProjectItemInstance+TaskItem.GetMetadataEscaped (System.String metadataName) [0x000ce] in <6a1392588f4a45bdbe07807130f9b3d0>:0 
  at Microsoft.Build.Execution.ProjectItemInstance+TaskItem.GetMetadata (System.String metadataName) [0x00001] in <6a1392588f4a45bdbe07807130f9b3d0>:0 
  at (wrapper remoting-invoke-with-check) Microsoft.Build.Execution.ProjectItemInstance+TaskItem:GetMetadata (string)
  at Microsoft.Build.Execution.ProjectItemInstance.GetMetadataValue (System.String name) [0x00001] in <6a1392588f4a45bdbe07807130f9b3d0>:0 
  at OmniSharp.MSBuild.ProjectFile.ProjectFileInfo.GetFullPaths (System.Collections.Generic.ICollection`1[T] items) [0x0001b] in <aca7f87b64bc414f95aff1158193a80c>:0 
  at OmniSharp.MSBuild.ProjectFile.ProjectFileInfo.Create (System.String projectFilePath, System.String solutionDirectory, Microsoft.Extensions.Logging.ILogger logger, OmniSharp.Options.MSBuildOptions options, System.Collections.Generic.ICollection`1[T] diagnostics, System.Boolean isUnityProject) [0x00309] in <aca7f87b64bc414f95aff1158193a80c>:0 
  at OmniSharp.MSBuild.MSBuildProjectSystem.CreateProjectFileInfo (System.String projectFilePath, System.Boolean isUnityProject) [0x0001f] in <aca7f87b64bc414f95aff1158193a80c>:0 

[info]: OmniSharp.Script.ScriptProjectSystem
        Detecting CSX files in '/path/to/project'.
[info]: OmniSharp.Script.ScriptProjectSystem
        Could not find any CSX files
[info]: OmniSharp.Startup
        Configuration finished.

[DustinCampbell]

Thanks! I've seen this error once before and it was related to an older version of Mono installed on the machine. Could you run mono --version in a terminal window and let me know the output?

[vonbloom]

Mono JIT compiler version 4.2.1 (Debian 4.2.1.102+dfsg2-7ubuntu4)
Copyright (C) 2002-2014 Novell, Inc, Xamarin Inc and Contributors. www.mono-project.com
    TLS:           __thread
    SIGSEGV:       altstack
    Notifications: epoll
    Architecture:  amd64
    Disabled:      none
    Misc:          softdebug 
    LLVM:          supported, not enabled.
    GC:            sgen

[DustinCampbell]

Thanks for confirming. Updating Mono on your machine should fix the issue. This is the same issue as https://github.com/OmniSharp/omnisharp-vscode/issues/1213.

[vonbloom]

I upgraded Mono to latest version following instructions from oficial site and can confirm that issue is fixed.

Thanks @DustinCampbell!

[hecool108]

Hi @vonbloom , I got the same problem, and I reinstalled mono, both by the official pkg and brew. The problem was still not solved. Finally the Unity plugin "VSCode" made it work.
When I review the structure after that, I found it removed both
ProjectName.csproj and
ProjectName.Editor.csproj.
Hope this can help others.