private void BoardMemberGreetings()
    {
        /**
         * 使用 继承+多态 来实现问候
         */
        int iNowTime = int.Parse(DateTime.Now.ToString("HH"));
        MultipurposeMultiplexingClass UsersGreetingsMethod = new MultipurposeMultiplexingClass();

        UsersGreetingsMethod.UsersGreetingsMethod(iNowTime);
        string sAdminGreetings = UsersGreetingsMethod.UsersGreetingsMethod(iNowTime);

        LBLBoardGreetings.Text = sAdminGreetings;
    }
    private void CounsellorGreetings()
    {
        /**
         * 使用继承来实现问候
         */
        int iNowTime = int.Parse(DateTime.Now.ToString("HH"));
        MultipurposeMultiplexingClass UsersGreetingsMethod = new MultipurposeMultiplexingClass();

        UsersGreetingsMethod.UsersGreetingsMethod(iNowTime);
        string sClientGreetings = UsersGreetingsMethod.UsersGreetingsMethod(iNowTime);

        LBLCounsellorGreetings.Text = sClientGreetings;
    }