This class encapsulates the InvalidRect of a Control for the Invalidated event, which is raised when an area of the window is dirty and needs repainting . public class InvalidateEventArgs : EventArgs { // Public Constructors public InvalidateEventArgs (System.Drawing.Rectangle invalidRect ); // Public Instance Properties public Rectangle InvalidRect {get; } } HierarchySystem.Object System.EventArgs InvalidateEventArgs Passed ToControl.OnInvalidated() , InvalidateEventHandler.{BeginInvoke() , Invoke()} |