XNA游戏界面全屏切换

 private void ToggleFullScreen()
{
      PresentationParameters presentation =
      graphics.GraphicsDevice.PresentationParameters;
      if (presentation.IsFullScreen)
      {    
            graphics.PreferredBackBufferWidth = 1024;
            graphics.PreferredBackBufferHeight = 768;
            Game.Window.AllowUserResizing = false;
      }
      else
      {
            GraphicsAdapter adapter = graphics.GraphicsDevice.CreationParameters.Adapter;
            graphics.PreferredBackBufferWidth = adapter.CurrentDisplayMode.Width;
            graphics.PreferredBackBufferHeight = adapter.CurrentDisplayMode.Height;
      }
      graphics.ToggleFullScreen();

}

1024和768应该是分辨率，刚刚试了下800和600，发现没这么清楚，因为我的电脑是联想Y450的，屏幕奇宽，用1024的时候发现两边是有黑色的边，于是把1024和768调成1200和768，然后，发现满屏了，呵呵