private void PositionAndResize(object sender, EventArgs e)
{
if (TargetElement != null && TargetElement.IsVisible)
{
var point = TargetElement.PointToScreen(new System.Windows.Point());
Left = point.X;
Top = point.Y;
Height = TargetElement.ActualHeight;
Width = TargetElement.ActualWidth;
}
}
