Represents a collection of controls
Inheritance: IControlCollection
 public void TestAddControl()
 {
     TextBoxWin tb = (TextBoxWin)GetControlFactory().CreateTextBox();
     IControlCollection col = new ControlCollectionWin(new System.Windows.Forms.Control.ControlCollection(tb));
     IControlHabanero ctl = GetControlFactory().CreateControl();
     col.Add(ctl);
     Assert.AreSame(ctl, col[0], "Control added should be the same object.");
 }