What does invalidate method do?

Question

What does invalidate method do in winform app?

Invalidate() method comes with six overloaded for

Answer 1

Asks windows to redraw the client area of the invalidated window.

From MSDN:

"Invalidates the entire surface of the control and causes the control to be redrawn."

http://msdn.microsoft.com/en-us/library/598t492a.aspx