On X11, asks the window manager to maximize the window, if the window manager supports this operation. Not all window managers support this, and some deliberately ignore it or don't have a concept of "maximized"; so you can't rely on the maximization actually happening. But it will happen with most standard window managers, and GDK makes a best effort to get it to happen. On Windows, reliably maximizes the window.

Namespace: Gdk
Assembly: gdk-sharp (in gdk-sharp.dll)