Icon icon = System.Drawing.Icon.ExtractAssociatedIcon(open.FileName);
System.Drawing.Bitmap bmp = new System.Drawing.Bitmap(icon.ToBitmap());
IntPtr hBitmap = bmp.GetHbitmap();
ImageSource WpfBitmap = Imaging.CreateBitmapSourceFromHBitmap(hBitmap, IntPtr.Zero, Int32Rect.Empty, BitmapSizeOptions.FromEmptyOptions());
image1.Source = WpfBitmap;