// REQUIRED for pin
        void AddPinOverlay(MapView map)
        {
            var pin        = Resources.GetDrawable(Resource.Drawable.map_pin);
            var pinOverlay = new MapPinOverlay(pin);

            map.Overlays.Add(pinOverlay);
        }
 // REQUIRED for pin
 void AddPinOverlay(MapView map)
 {
     var pin = Resources.GetDrawable(Resource.Drawable.map_pin);
     var pinOverlay = new MapPinOverlay(pin);
     map.Overlays.Add(pinOverlay);
 }