MemoryStream memStream = new MemoryStream();            System.Windows.Media.Imaging.RenderTargetBitmap bmp = new System.Windows.Media.Imaging.RenderTargetBitmap((int)panel.ActualWidth, (int)panel.ActualHeight, 96d, 96d, System.Windows.Media.PixelFormats.Pbgra32);            bmp.Render(panel);            System.Windows.Media.Imaging.JpegBitmapEncoder encoder = new System.Windows.Media.Imaging.JpegBitmapEncoder();            encoder.Frames.Add(System.Windows.Media.Imaging.BitmapFrame.Create(bmp));            encoder.Save(memStream);            byte[] bt = memStream.ToArray();            memStream.Close();            memStream = new MemoryStream(bt);            BitmapImage biImg = new BitmapImage();            biImg.BeginInit();            biImg.StreamSource = memStream;            biImg.EndInit();                        ImageBrush brush = new ImageBrush();            brush.ImageSource = (ImageSource)biImg;            imagePanel2.Background = brush;