anchor.diff:  
       override x.Initialize() =
           base.Initialize ()
  -        //let syntaxMode = new FSharpSyntaxMode (this.Editor, this.DocumentContext)
  -        //this.Editor.SemanticHighlighting <- syntaxMode
  +        let syntaxMode = new FSharpSyntaxMode (x.Editor, x.DocumentContext)
  +        x.Editor.SemanticHighlighting <- syntaxMode
   
       override x.ResolveAsync (token) =
           Async.StartAsTask (
  
positive.code:                 let! symbolReferences = MDLanguageService.Instance.GetUsesOfSymbolAtLocationInFile (projectFilename, currentFile, source, files, line, col, lineStr, args)
                  return symbolReferences
              with
              | :? OperationCanceledException -> return None
              | exn -> LoggingService.LogError("Unhandled Exception in F# HighlightingUsagesExtension", exn)
                       return None })
              
  
negative.code:                 | _ -> Seq.empty
                                  
              with
              | :? Threading.Tasks.TaskCanceledException -> Seq.empty
              | exn -> LoggingService.LogError("Unhandled Exception in F# HighlightingUsagesExtension", exn)
                       Seq.empty
  
      override x.Dispose () =
          x.Editor.SemanticHighlighting.Dispose()
          x.Editor.SemanticHighlighting <- null
  