Microsoft.Direct3D.Device device = ...;

    PresentParameters presentParams = new PresentParameters();
    presentParams.Windowed = false;
    presentParams.SwapEffect = SwapEffect.Discard;
    presentParams.BackBufferFormat = Format.A8R8G8B8;
    presentParams.BackBufferCount = 1;
    presentParams.BackBufferWidth = 640;
    presentParams.BackBufferHeight = 480;
    presentParams.PresentationInterval = PresentInterval.One;

    device.Reset(presentParams);