时间戳和本地时间的转换

public static string GetTimeStamp( DateTime date)
        {
            TimeSpan ts = date.ToUniversalTime() - new DateTime( 1970, 1 , 1, 0, 0 , 0, 0);
            var ret =   Convert. ToInt64(ts.TotalSeconds) .ToString();
            return ret;
        }

 public static DateTime FROM_UNIXTIME( long timeStamp)
        {
            return DateTime .Parse("1970-01-01 00:00:00" ).AddSeconds(timeStamp) .ToLocalTime();
        }