C# 時間戳與DateTime互轉

       #region 轉換時間為unix時間戳
        /// <summary>
        /// 轉換時間為unix時間戳
        /// </summary>
        /// <param name="date">需要傳遞UTC時間,避免時區誤差,例:DataTime.UTCNow</param>
        /// <returns></returns>
        public static double ConvertToUnixOfTime(DateTime date)
        {
            DateTime origin = new DateTime(1970, 1, 1, 0, 0, 0, 0);
            TimeSpan diff = date - origin;
            return Math.Floor(diff.TotalSeconds);
        }
        #endregion

        #region 時間戳轉換為時間

        public static DateTime StampToDateTime(string timeStamp)
        {
            DateTime dateTimeStart = TimeZone.CurrentTimeZone.ToLocalTime(new DateTime(1970, 1, 1));
            long lTime = long.Parse(timeStamp + "0000000");
            TimeSpan toNow = new TimeSpan(lTime);
            return dateTimeStart.Add(toNow);
        }

        #endregion