Fails to load a project that uses an additional SDK reference

[timjroberts]

The extension fails to load .csproj files where additional SDKs have been specified as per the MSBUILD 15.6 "Sdk" Design concept.

Environment data

dotnet --info output:

.NET Command Line Tools (2.1.300-preview1-008174)

Product Information:
 Version:            2.1.300-preview1-008174
 Commit SHA-1 hash:  b8df89a54f

Runtime Environment:
 OS Name:     Mac OS X
 OS Version:  10.13
 OS Platform: Darwin
 RID:         osx.10.12-x64
 Base Path:   /usr/local/share/dotnet/sdk/2.1.300-preview1-008174/

Microsoft .NET Core Shared Framework Host

  Version  : 2.1.0-preview1-26216-03
  Build    : f2c3216183d20416568a4bbf5bb7d153e826f153

VS Code version: 1.21.1
C# Extension version: 1.14.0

Steps to reproduce

Create a .csproj file that references an additional SDK. In my particular example, I have:

<Project Sdk="Microsoft.NET.Sdk;TypeScript.Sdk">
    ....
</Project>

In this example, TypeScript.Sdk has been manually installed into the SDK base path (identified in the dotnet --info output above), however, I've also tried using TypeScript.Sdk/1.0.0 which should prompt the NuGet resolver in MSBUILD to download and make the SDK available.

Expected behavior

The project should load successfully and code-lens/autocompletion support work as normal.

Actual behavior

I receive the following output in the Output window:

[info]: OmniSharp.MSBuild.ProjectManager
        Loading project: /Users/timroberts/test3/Core/Core.csproj
Can't find custom attr constructor image: /usr/local/share/dotnet/sdk/2.1.300-preview1-008174/Sdks/TypeScript.Sdk/lib/netstandard2.0/TypeScript.Sdk.Tasks.dll mtoken: 0x0a00000a due to: Could not load file or assembly 'netstandard, Version=2.0.0.0, Culture=neutral, PublicKeyToken=cc7b13ffcd2ddd51' or one of its dependencies. assembly:netstandard, Version=2.0.0.0, Culture=neutral, PublicKeyToken=cc7b13ffcd2ddd51 type:<unknown type> member:<none>

At that point I receive no code-lens or autocompletion support for any project in the solution.

Running dotnet build works as expected, and the SDKs are executed as intended.

[DustinCampbell]

This issue was moved to OmniSharp/omnisharp-roslyn#1138

[DustinCampbell]

Thanks for reporting this. I've moved the issue to the omnisharp-roslyn repo, since it's more about OmniSharp than C# for VS Code. It will be a bit before this feature makes it's way into OmniSharp. However, you may be able to get it to work by installing the latest Mono MDK (http://www.mono-project.com/download/) if the new MSBuild feature has made its way into Mono. C# for VS Code will use the installed Mono MSBuild if it's present.

[timjroberts]

Thanks @DustinCampbell. I'll update the MDK and see if that flies too.

[timjroberts]

Installing Mono 5.10.0 resolves the issue. The solution and projects load as expected and code-lens/autocompletion support works as normal.

Wished I had tried that first.

[DustinCampbell]

Glad to hear it!