GoogleOverlay gg = new GoogleOverlay();
gg.TileType = TileType.MultipleTile;
gg.GoogleMapType = GoogleMapType.Satellite;
gg.Name = "gg";
////gg.ServerUris.Add(new Uri(""));
//gg.ImageFormat = GoogleImageFormat.Png8;
Map1.Overlays.Add(gg);
Why I got error? How do I add Google map to overaylayer.