private void Dispose(bool isDisposing)
        {
            if (isDisposing)
            {
                foreach (pSprite p in Sprites)
                {
                    m_sprite_manager.Remove(p);
                    p.Dispose();
                }

                m_sprite_manager.Remove(Background);
                Background.Dispose();
            }
        }
 public override void Dispose()
 {
     base.Dispose();
     spinner.Dispose();
 }