class Program    {        static void Main(string[] args)        {            //十进制转二进制            Console.WriteLine("十进制166的二进制表示: " + Convert.ToString(166, 2));            //十进制转八进制            Console.WriteLine("十进制166的八进制表示: " + Convert.ToString(166, 8));            //十进制转十六进制            Console.WriteLine("十进制166的十六进制表示: " + Convert.ToString(166, 16));                Timer t = new Timer();            t.Elapsed += new ElapsedEventHandler(writesecond);            t.Interval = 1000;            t.Enabled = true;            Console.ReadLine();        }        public static void writesecond(object source, ElapsedEventArgs e)        {            Console.Clear();            Console.WriteLine("当前秒数：" + DateTime.Now.ToString());        }    }