计算两个时间之间的日期

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/// <summary>         /// 计算两个时间之间的日期         /// </summary>         /// <param name="startDate">开始日期</param>         /// <param name="endDate">结束日期</param>         /// <returns>日期集合</returns>         /// <exception cref="ArgumentException">异常</exception>         private static IEnumerable<DateTime> GetDateTimes(DateTime startDate, DateTime endDate)         {             if (endDate < startDate)             {                 throw new ArgumentException(nameof(startDate));             }               var result = new List<DateTime>();             for (var date = startDate; date <= endDate; date = date.AddDays(1))             {                 result.Add(date);             }               return result;         }