System.Windows.Forms.MdiClient.ControlCollection.Add C# (CSharp) Method

			public override void Add(Control value) {
				if ((value is Form) == false || !(((Form)value).IsMdiChild)) {
					throw new ArgumentException("Form must be MdiChild");
				}
				owner.mdi_child_list.Add (value);
				base.Add (value);

				// newest member is the active one
				Form form = (Form) value;
				owner.ActiveMdiChild = form;
			}