1 public double   ConvertDateTimeInt(System.DateTime time)
 2         {
 3             double   intResult = 0;
 4             System.DateTime startTime = TimeZone.CurrentTimeZone.ToLocalTime(new System.DateTime(1970, 1, 1));
 5             intResult =  (time - startTime).TotalSeconds ;
 6             return intResult;
 7         }
 8         public DateTime  ConvertIntDatetime(double   utc)
 9         {         
10             System.DateTime startTime = TimeZone.CurrentTimeZone.ToLocalTime(new System.DateTime(1970, 1, 1));
11             startTime = startTime.AddSeconds(utc);     
12            startTime = startTime.AddHours(8);//转化为北京时间(北京时间=UTC时间+8小时 )
13             return startTime;
14         }
15       
16 
17  
18 
19 调用方法
20 
21  DateTime utcNow = DateTime.Now.ToUniversalTime();
22  double utc= ConvertDateTimeInt(utcNow);
23  DateTime dtime = ConvertIntDatetime(utc);