//public System.Drawing.RectangleF Area
//{
// get
// {
// if (!Controls.Any())
// return RectangleF.Empty;
// return Controls.Skip(1).Aggregate(Controls.First().Area, (r, c) => RectangleF.Union(r, c.Area), a => a);
// }
//}
public void Paint(Graphics g)
{
Controls.ForAll(c => c.Paint(g));
}