求C#阴历转阳历的类

  /**//// <summary>

        /// 阴历转阳历

        /// </summary>

        /// <param name="year">阴历年</param>

        /// <param name="month">阴历月</param>

        /// <param name="day">阴历日</param>

        /// <param name="IsLeapMonth">是否闰月</param>

        public static DateTime GetDateFromLunarDate(int year, int month, int day, bool IsLeapMonth)

        {

            if (year < 1902 || year > 2100)

                throw new Exception("只支持1902～2100期间的农历年");

            if (month < 1 || month > 12)

                throw new Exception("表示月份的数字必须在1～12之间");



            if (day < 1 || day > calendar.GetDaysInMonth(year, month))

                throw new Exception("农历日期输入有误");



            int num1 = 0, num2 = 0;

            int leapMonth = calendar.GetLeapMonth(year);



            if (((leapMonth == month + 1) && IsLeapMonth) || (leapMonth > 0 && leapMonth <= month))

                num2 = month;

            else

                num2 = month - 1;



            while (num2 > 0)

            {

                num1 += calendar.GetDaysInMonth(year, num2--);

            }



            DateTime dt = GetLunarNewYearDate(year);

            return dt.AddDays(num1 + day - 1);

        }