TimeSpan

using System;

using System.Timers;



namespace ConsoleApplication1

{

    class Program

    {

        static void Main(string[] args)

        {

            var time1 = "2010-5-26 8:10:00";

            var time2 = "2013-4-11 15:49:00";

            var t1 = Convert.ToDateTime(time1);

            var t2 = Convert.ToDateTime(time2);

            

            var timeSpan = t1 - t2;



            Console.WriteLine(timeSpan.Hours);

            Console.WriteLine(timeSpan.TotalHours);



            Console.WriteLine(timeSpan.Minutes);

            Console.WriteLine(timeSpan.TotalMinutes);



            Console.WriteLine(t1 - t2);



            var timeSpan1 = t2 - DateTime.Now;

            var timer = new Timer(1000);

            timer.Elapsed += (obj, ergs) =>

            {

                Console.WriteLine(timeSpan1.TotalSeconds);

                timeSpan1 = t2.Subtract(DateTime.Now);

            };



            timer.Start();



            Console.WriteLine("time out.");



            Console.Read();

        }

    }

}