/// <summary>
        /// DateTime時間格式轉換為13位帶毫秒的Unix時間戳
        /// </summary>
        /// <param name="time"> DateTime時間格式</param>
        /// <returns>Unix時間戳格式</returns>
        public static long ConvertDateTimeLong(System.DateTime time)
        {
            System.DateTime startTime 
 
= TimeZone.CurrentTimeZone.ToLocalTime(new System.DateTime(1970, 1, 1));
            return (long)(time - startTime).TotalMilliseconds;
        }

//=========================================
        /// <summary>
        /// DateTime時間格式轉換為10位不帶毫秒的Unix時間戳
        /// </summary>
        /// <param name="time">
 
 DateTime時間格式</param>
        /// <returns>Unix時間戳格式</returns>
        public static int ConvertDateTimeInt(System.DateTime time)
        {
            System.DateTime startTime = TimeZone.CurrentTimeZone.ToLocalTime(new System.DateTime(1970, 1, 1));
            return (int)(time - startTime).TotalSeconds;
        }
//========================================
 
/// <summary>
        /// 時間戳轉為C#格式時間
        /// </summary>
        /// <param name="timeStamp">Unix時間戳格式</param>
        /// <returns>C#格式時間</returns>
        public static DateTime GetTime(string timeStamp)
        {
            DateTime dtStart = TimeZone.CurrentTimeZone.ToLocalTime(new DateTime(1970, 1, 1));
            long lTime = long.Parse(timeStamp + "0000000");
            TimeSpan toNow = new TimeSpan(lTime);
            return dtStart.Add(toNow);
        }

C#使用各種時間戳及轉換