System.Web 2.0.0.0 A class derived from implements the interface to allow its associated designer to call the control's method at design time. The associated designer must derive from . The interface is used primarily by control developers. Provides an interface to allow a composite-control designer to recreate the child controls of its associated control at design time. Method System.Void The method allows a designer for a composite control to recreate the control's child controls at design time. The method is used primarily by control developers. In a control derived from , recreates the child controls at design time. Called by the control's associated designer. 2.0.0.0