void CreateAsteroid()
{
// This is the same code as I used in Initialize().
// Duplicate code is extremely bad practice. So you should now modify
// Initialize() so that it calls this method instead.
int screenWidth = GraphicsDevice.Viewport.Width;
float xPosition = Shared.Random.Next(0, screenWidth);
asteroids.Add(new Asteroid(new Vector2(xPosition, 0));
}
protected override void Update(GameTime gameTime)