/// <summary>
/// UnloadContent will be called once per game and is the place to unload
/// game-specific content.
/// </summary>
protected override void UnloadContent()
{
// TODO: Unload any non ContentManager content here
spaceManager.Dispose();
sunManager.Dispose();
planetManager.Dispose();
asteroidManager.Dispose();
menuManager.Dispose();
creditManager.Dispose();
}