Hey guys, I have an XNA window represented in winForm pictureBox. Now the problem I have is - when I want to stretch the window or maximize it, the XNA windows gets stretch (like scaled) and what I want is for it to be in the same scale.
To be more clear:
what I have now:

and when maximized window:


what I want is that when it maximized the scale remains the same, just all 'extra' space gets filled with XNA background color.