anchor.diff:              with exn ->
                   Diagnostics.Debug.WriteLine(exn.ToString())
           finally
  -            MonoDevelop.Ide.TypeSystem.TypeSystemService.Unload solution
  +            typeof<MonoDevelop.Ide.TypeSystem.TypeSystemService>?Unload(solution)
           doc, content
positive.code:         let project = new DotNetAssemblyProject ("F#", Name="test", FileName = FilePath("test.fsproj"))
          project.References.AddRange references
          project.Files.Add (new ProjectFile ("/a.fs", BuildAction.Compile))
          let projectConfig = project.AddNewConfiguration("Debug")
  
          use solution = new MonoDevelop.Projects.Solution ()
          solution.AddConfiguration ("", true) |> ignore
  
negative.code: 
  module TestHelpers =
  
      let createDoc (text:string) references defines =
          let content = new TestViewContent()
          let tww = TestWorkbenchWindow(content)
  
  