private void PinnedItems_Drop(object sender, SurfaceDragDropEventArgs e)
        {
            DragableImageItem  image = e.Cursor.Data as DragableImageItem;
            SurfaceListBoxItem s     = (SurfaceListBoxItem)sender;

            BluetoothHandler.SendBluetooth((s.Content as PhoneThumbVisualization).BTEndpoint, image.Image);
        }
        private void StackPanel_Drop(object sender, SurfaceDragDropEventArgs e)
        {
            DragableImageItem item = e.Cursor.Data as DragableImageItem;

            if (BTEndpoint != null)
            {
                BluetoothHandler.SendBluetooth(BTEndpoint, item.Image);
            }
        }