Changing Resolution in OpenTK

Question

I've been searching around for this, I've managed to find out out to change the size of our window, and how to change the resolution of the monitor.

But I can't seem to find how to tell OpenGL where and how big my viewport is.

Example: the game starts up in 400x300, and I expand the window to 800x600. I now have a 800x600 window, but only a 400x300 box in the corner is being rendered to. I get the same problem when switching to fullscreen, the gray area covers the entire screen, but I only have a small box in the corner being rendered to.

Any OpenTK people out there that know how to do this?

Answer 1

You need to refresh your viewport:

GL.Viewport(gameWindow.ClientRectangle);