You can render your game to a render target in the resolution you want, then draw that scaled to the backbuffer. If you don’t know how exactly, I posted about that here: [Solved]Scaling/zooming game window?
You can render your game to a render target in the resolution you want, then draw that scaled to the backbuffer. If you don’t know how exactly, I posted about that here: [Solved]Scaling/zooming game window?