using System.Windows.Interop;

//...

// Convert BitmapImage to Bitmap

private Bitmap BitmapImage2Bitmap(BitmapImage bitmapImage)

 {         return new Bitmap(bitmapImage.StreamSource);  }      // Convert Bitmap to BitmapImage  private BitmapImage Bitmap2BitmapImage(Bitmap bitmap)  {                       BitmapSource i = Imaging.CreateBitmapSourceFromHBitmap(bitmap.GetHbitmap(),IntPtr.Zero,Int32Rect.Empty,BitmapSizeOptions.FromEmptyOptions());       return (BitmapImage)i;  }