public DraggableVisualFeedback()
 {
     InitializeComponent();
     SourceInitialized += OnSourceInitialized;
     _systemMouse = new SystemMouse();
     _systemMouse.PositionChanged += MousePositionChanged;
 }
 public DraggableVisualFeedback()
 {
     InitializeComponent();
     SourceInitialized            += OnSourceInitialized;
     _systemMouse                  = new SystemMouse();
     _systemMouse.PositionChanged += MousePositionChanged;
 }