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        /// <summary>  
        /// DateTime时间格式转换为Unix时间戳格式  
        /// </summary>  
        /// <param name="time"> DateTime时间格式</param>  
        /// <returns>Unix时间戳格式</returns>  
        public static long GetTimestamp(DateTime time)
        {
            DateTime startTime = new DateTime(1970, 1, 1, 0, 0, 0);
            return (long)(time.ToUniversalTime() - startTime).TotalSeconds;
        }