protected override void Initialize()
{
base.Initialize();
highlightsService = DocumentContext.RoslynWorkspace.Services.GetLanguageServices(LanguageNames.CSharp).GetService <IDocumentHighlightsService> ();
Editor.SetSelectionSurroundingProvider(new CSharpSelectionSurroundingProvider(Editor, DocumentContext));
fallbackHighlighting = Editor.SyntaxHighlighting;
UpdateHighlighting();
DocumentContext.AnalysisDocumentChanged += HandleAnalysisDocumentChanged;
}