C# UTP时间转换

 1    protected   static   readonly  DateTime unixTPStart  =
 2                    TimeZone.CurrentTimeZone.ToLocalTime( new  DateTime( 1970 ,  1 ,  1 ));
 3              public   static   long  toUTP(DateTime dt)
 4              {
 5                TimeSpan toNow = dt.Subtract(unixTPStart);
 6                return (long)Math.Round(toNow.TotalSeconds);
 7            }
 8              public   static  DateTime fromUTP( long  tp)
 9              {
10                return unixTPStart.Add(new TimeSpan(tp * 10000000));
11            }
12