C#单例写法

static control instance;
    public static control Instance
    {
        get
        {
            if (instance == null)
            {
                instance = FindObjectOfType();
                if (instance == null)
                {
                    GameObject container = new GameObject();
                    container.name = "control";
                    instance = container.AddComponent();
                }
                DontDestroyOnLoad(instance);
            }
            return instance;
        }
    }