system.datatime 与system.timespan
static void Main(string[] args) { Console.WriteLine("*********"); UseDatesAndTimes(); Console.ReadLine(); } private static void UseDatesAndTimes() { DateTime dt = new DateTime(2010, 10, 17); //一个月中的哪一天 Console.WriteLine("tht day of {0},is {1}", dt.Date, dt.DayOfWeek); //增加月份 dt = dt.AddMonths(2); Console.WriteLine("day light saving {0};{1}", dt.IsDaylightSavingTime(),dt.Month); //构造函数接受小时,分钟,秒 TimeSpan ts = new TimeSpan(4, 30, 0); Console.WriteLine(ts); //从当前减去15分钟 Console.WriteLine(ts.Subtract(new TimeSpan(0,15,0))); }