public void Dispose()
 {
     _bitmap.NotifyPixelsChanged();
     _parent.Version++;
     Monitor.Exit(_parent._lock);
     _bitmap = null;
     _parent = null;
 }
 public BitmapFramebuffer(WriteableBitmapImpl parent, SKBitmap bitmap)
 {
     _parent = parent;
     _bitmap = bitmap;
     Monitor.Enter(parent._lock);
 }