公历农历相互转换方

//公历转换为农历
ChineseLunisolarCalendar ChineseCalendar = new ChineseLunisolarCalendar();
            int year = ChineseCalendar.GetYear(DateTime.Now);
            int month = ChineseCalendar.GetMonth(DateTime.Now);
            int day = ChineseCalendar.GetDayOfMonth(DateTime.Now);
            string LunarBirthday = string.Format(year+"-"+ month+"-"+ day);
            model.LunarBirthday =Convert.ToDateTime(LunarBirthday); 
//农历转换为公历 
ChineseLunisolarCalendar SolarCalendar = new ChineseLunisolarCalendar();
DateTime Birthday = SolarCalendar.ToDateTime(model.LunarBirthday.Year, model.LunarBirthday.Month, model.LunarBirthday.Day, model.LunarBirthday.Hour, model.LunarBirthday.Minute, model.LunarBirthday.Second, model.LunarBirthday.Millisecond);
model.Birthday = Birthday;