using System;

 using System.Collections.Generic;

 using System.Linq;

 using System.Text;

 namespace Temp_20160623_时间时区

 {

     class Program

     {

         static void Main(string[] args)

         {

             DateTime timeNow = DateTime.Now;         //当前本地时间 (北京时间+8)

             DateTime timeUtcNow = DateTime.UtcNow;   //世界协调时间 (格林威治+0)

             DateTime timeUtcNow2 = new DateTime(

                 timeUtcNow.Year, timeUtcNow.Month, timeUtcNow.Day,

                 timeUtcNow.Hour, timeUtcNow.Minute, timeUtcNow.Second, timeUtcNow.Millisecond,

                 DateTimeKind.Local);                 //世界协调时间 (北京时间+0) —— 和 UTC时间 值一样 的 北京时间

             Console.WriteLine("北京时间+8 :" + timeNow);

             Console.WriteLine("格林威治+0 :" + timeUtcNow);

             Console.WriteLine("北京时间+8 :" + timeUtcNow2);

             //timeNow 和 timeUtcNow 相差 8个时区

             //问:       这两个时间相减 等于多少？

             TimeSpan timeSpan = timeNow - timeUtcNow;

             Console.WriteLine("({0} +8) - ({1} +0) = {2}", timeNow, timeUtcNow, timeSpan.TotalHours.ToString("F6"));

             TimeSpan timeSpan2 = timeNow - timeUtcNow2;

             Console.WriteLine("({0} +8) - ({1} +8) = {2}", timeNow, timeUtcNow2, timeSpan2.TotalHours.ToString("F6"));

         }

     }

 }