Jūs esatechange resolution
change resolution
XNA. Change resolution & set full screen
I am creating a game with the XNA framework and I needed to change the resolution for XNA game. So, that's how it's done:
public class MyCoolGame : Microsoft.Xna.Framework.Game
// Code...
// GraphicsDeviceManager graphics = new GraphicsDeviceManager(this);
graphics.PreferredBackBufferWidth = Width;
graphics.PreferredBackBufferHeight = Height;
graphics.ApplyChanges();
Another very useful property is IsFullScreen - boolean variable, which sets game to full screen or not (do not forget to call graphics.ApplyChanges().).

