倒计时[C#]

            //显示时间   
            DateTime now = DateTime.Now;
            DateTime end = Convert.ToDateTime("2011-12-04 00:00:00");

            TimeSpan ts1 = new TimeSpan(now.Ticks);
            TimeSpan ts2 = new TimeSpan(end.Ticks);
            TimeSpan ts = ts1.Subtract(ts2).Duration();
            string  dateDiff = ts.Days.ToString() + "天" + ts.Hours.ToString() + "小时"
                            + ts.Minutes.ToString() + "分";