protected void Application_Start()
        {
            //新启动一个线程。
            Thread currentThread = new Thread(new ThreadStart(InsertDB));
            currentThread.Start();
        }
        //具体操作方法
        void InsertDB()
        {
            int hour = DateTime.Now.Hour;
            if(hour>8 && hour<9)
            {
                //写入数据
            }
            else if (hour > 15 && hour < 17)
            {
                //写入数据
            }
            System.Threading.Thread.Sleep(10000);
        }