private static void OnUriChange(DependencyObject d, DependencyPropertyChangedEventArgs e)
{
GifControl gif = d as GifControl;
String u = e.NewValue.ToString();
gif.Uri = u;
}
static void ChangingFrameIndex(DependencyObject obj, DependencyPropertyChangedEventArgs ev)
{
GifControl ob = obj as GifControl;
ob.gifImg.SelectActiveFrame(ob.dimension, (int)ev.NewValue);
BitmapImage bi = new BitmapImage();
bi.BeginInit();
MemoryStream ms = new MemoryStream();
// Save to a memory stream..
ob.gifImg.Save(ms, ImageFormat.Bmp);
// Rewind the stream..
ms.Seek(0, SeekOrigin.Begin);
// Tell the WPF image to use this stream...
bi.StreamSource = ms;
bi.EndInit();
ob.Source = bi;
ob.InvalidateVisual();
}