C#单例设计模式

主要用于游戏角色以及单例的游戏体

class SingleObject
    {
        //单例设计模式
        //1.构造函数私有化
        private SingleObject()
        { }
        //2.声明全局唯一对象
        private static SingleObject _single = null;
        
        //3.提供一个函数用于返回唯一一个对象
        public static SingleObject GetSingle() 
        { 
            if(_single==null)
            {
                _single = new SingleObject();
            }
            return _single;
        }
        //生成get set方法
        public BackGround BG
        {
            get;
            set;
        }
        public PlaneHero PH
        {
            get;
            set;
        }
        //写一个函数，将游戏对象，添加到窗体中
        public void AddGameObject(GameObject go)
        {
            if(go is BackGround)
            {
                this.BG = go as BackGround;
            }
            else if(go is PlaneHero)
            {
                this.PH = PH as PlaneHero;
            }
        }
        public void Draw(Graphics g)
        {
            this.BG.Draw(g);
            this.PH.Draw(g);
        }
    }