private static void PopoutCard(UIElement element, DragImage image, Point relativePosition)
{
// Copy the selected card into a bitmap for use as the movement target
var bitmap = new WriteableBitmap(element, null);
image.Image.Source = bitmap;
image.Visibility = Visibility.Visible;
image.Opacity = 1.0;
// this needs to be relative to the scrolled position
image.SetVerticalOffset(relativePosition.Y);
//image.SetHorizontalOffset(relativePosition.X);
// hide the underlying item
element.Opacity = 0.0;
}