/// <summary>
/// handle the mouse down so that the Prompt is disabled
/// </summary>
/// <param name="e">Event args</param>
protected override void OnMouseDown(MouseButtonEventArgs e)
{
AdornerLayer layer = AdornerLayer.GetAdornerLayer(AdornedElement);
if (layer != null)
{
layer.Remove(this);
EnableDisableElement(AdornedElement, false);
AdornedElement.Focus();
}
base.OnMouseDown(e);
}