using System; using System.Collections.Generic; using System.Text; namespace PublicClass {     public static class CalculationDate     {         /// <summary>         /// 由两个日期计算出年龄(岁、月、天)         /// </summary>         public static void calculationDate(DateTime beginDateTime, DateTime endDateTime)         {             if (beginDateTime > endDateTime)                 throw new Exception("开始时间应小于或等与结束时间！");             /*计算出生日期到当前日期总月数*/             int Months = endDateTime.Month - beginDateTime.Month + 12 * (endDateTime.Year - beginDateTime.Year);             /*出生日期加总月数后，如果大于当前日期则减一个月*/             int totalMonth = (beginDateTime.AddMonths(Months) > endDateTime) ? Months - 1 : Months;             /*计算整年*/             int fullYear = totalMonth / 12;             /*计算整月*/             int fullMonth = totalMonth % 12;             /*计算天数*/             DateTime changeDate = beginDateTime.AddMonths(totalMonth);             double days = (endDateTime - changeDate).TotalDays;         }     } }