public ActivityDesigner()
        {
            this.Loaded += (sender, args) =>
            {
                this.SetupDefaultIcon();
                this.annotationManager.Initialize();
            };

            this.Unloaded += (sender, args) =>
            {
                this.annotationManager.Uninitialize();
            };

            this.annotationManager = new AnnotationManager(this);
        }
 private void InitializeAnnotation()
 {
     this.annotationManager = new AnnotationManager(this);
     this.annotationManager.AnnotationVisualProvider = new FlowSwitchDesignerAnnotationVisualProvider(this);
 }