【机房合作】之单例模式的实现

 #region 单例模式
        private static frmMainUser MainUser = null;//声明一个静态的类变量

        private frmMainUser()
        {
            InitializeComponent();
        }
        public static frmMainUser GetInstance()
        {
            if (MainUser==null || MainUser.IsDisposed)
            {
                MainUser = new frmMainUser();
            }
            return MainUser;
        }
        #endregion

private void ntfMainUser_MouseClick(object sender, MouseEventArgs e)
        {
            frmMainUser.GetInstance().Show();
        }