类的内部实例

最新推荐文章于 2022-04-08 16:34:07 发布

原创最新推荐文章于 2022-04-08 16:34:07 发布 · 342 阅读

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#object #null

        private volatile static AddVacations _instance = null;
        private static Object _locker = new Object();
        public static AddVacations Instance
        {
            get
            {
                if (_instance == null)
                    lock (_locker)
                        if (_instance == null)
                            _instance = new AddVacations();
                return _instance;
            }
        }