Could not load type 'System.Reflection.Metadata.ISignatureTypeProvider from assembly System.Reflection.Metadata

Question

I'm currently trying to experiment with the Roslyn Workspaces API on OSX and keep running into the following exception when calling CreateRoslynWorkspace:

"Could not load type 'System.Reflection.Metadata.ISignatureTypeProvider`1' from assembly 'System.Reflection.Metadata, Version=1.4.1.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a'."

Is anyone else able to shed some light as to what could be causing this?

Here is the code I am using:

public static class Class1
{
    public static IEnumerable<Microsoft.CodeAnalysis.Workspace> Create(string projectPath)
    {
        var builder = new ProjectContextBuilder().WithProjectDirectory(projectPath);

        return builder.BuildAllTargets().Select(context => context.CreateRoslynWorkspace());
    }

    public static void GetProject()
    {
        // Entry point
        var path = Directory.GetCurrentDirectory() + "/src/DemoLib/project.json";
        var result = Create(path).ToList();
    }
}

and this is the project.json I am using

{
  "version": "1.0.0-*",
  "buildOptions": {
    "debugType": "portable"
  },
  "dependencies": {
    "Microsoft.CodeAnalysis.CSharp": "2.0.0-rc2",
    "Microsoft.CodeAnalysis.CSharp.Features": "2.0.0-rc2",
    "Microsoft.CodeAnalysis.CSharp.Workspaces": "2.0.0-rc2",
    "Microsoft.DotNet.ProjectModel": "1.0.0-rc3-1-003177",
    "Microsoft.DotNet.ProjectModel.Loader": "1.0.0-preview2-1-003177",
    "Microsoft.DotNet.ProjectModel.Workspaces": "1.0.0-preview2-1-003177"
  },
    "frameworks": {
      "netcoreapp1.1": {
        "imports": [ "portable-net45+win8" ]
      }
    }
}

Here is the entire stack trace too:

" at System.Reflection.RuntimeModule.GetTypes(RuntimeModule module)\n at System.Reflection.RuntimeAssembly.get_DefinedTypes()\n at System.Composition.Hosting.ContainerConfiguration.b__0(Assembly a)\n at System.Linq.Enumerable.d__1592.MoveNext()\n at System.Composition.TypedParts.TypedPartExportDescriptorProvider..ctor(IEnumerable1 types, AttributedModelProvider attributeContext)\n at System.Composition.Hosting.ContainerConfiguration.CreateContainer()\n at Microsoft.CodeAnalysis.Host.Mef.MefHostServices.Create(IEnumerable1 assemblies)\n at Microsoft.CodeAnalysis.Host.Mef.MefHostServices.get_DefaultHost()\n at Microsoft.DotNet.ProjectModel.Workspaces.ProjectJsonWorkspace..ctor(ProjectContext context)\n at Microsoft.DotNet.ProjectModel.Workspaces.WorkspaceProjectContextExtensions.CreateRoslynWorkspace(ProjectContext context)\n at ClassLibrary.Class1.<>c.<Create>b__0_0(ProjectContext context) in /Users/personal/Dev/RoslynWorkspace2/src/Lib/Library.cs:line 16\n at System.Linq.Enumerable.SelectEnumerableIterator2.MoveNext()\n at System.Collections.Generic.List1..ctor(IEnumerable1 collection)\n at System.Linq.Enumerable.ToList[TSource](IEnumerable`1 source)\n at ClassLibrary.Class1.GetProject() in /Users/personal/Dev/RoslynWorkspace2/src/Lib/Library.cs:line 21\n at WebAPIApplication.Controllers.ValuesController.Get() in /Users/personal/Dev/RoslynWorkspace2/src/WebAPIApplication/Controllers/ValuesController.cs:line 13\n at lambda_method(Closure , Object , Object[] )\n at Microsoft.AspNetCore.Mvc.Internal.ControllerActionInvoker.d__28.MoveNext()"

Answer 1

Add "System.Reflection.Metadata" as dependency to the project.json.