返回时间差[返回秒]

        /// <summary>
        /// 返回时间差[返回秒]
        /// </summary>
        /// <param name="DateTimex">时间1（小）</param>
        /// <param name="DateTimed">时间2（大）</param>
        /// <returns>返回秒</returns>
        public static double TDiff(DateTime DateTimex, DateTime DateTimed)
        {
           return ((TimeSpan)(DateTimed - DateTimex)).TotalSeconds;
        }

程序调用：TDiff(DateTime.Now, DateTime.Now.AddHours(1))

运行结果：3600