private void graphics_PreparingDeviceSettings(object sender, PreparingDeviceSettingsEventArgs e)
{
nativeScreenWidth = graphics.PreferredBackBufferWidth;
nativeScreenHeight = graphics.PreferredBackBufferHeight;
graphics.PreferredBackBufferWidth = 1280;
graphics.PreferredBackBufferHeight = 720;
graphics.PreferMultiSampling = true;
graphics.GraphicsProfile = GraphicsProfile.HiDef;
graphics.SynchronizeWithVerticalRetrace = true;
graphics.PreferredDepthStencilFormat = DepthFormat.Depth24Stencil8;
e.GraphicsDeviceInformation.PresentationParameters.MultiSampleCount = 16;
}