System.Globalization.HebrewCalendar.GetHebrewYearType C# (CSharp) Method

        internal int GetHebrewYearType(int year, int era) {
            CheckHebrewYearValue(year, era, "year");
            // The m_HebrewTable is indexed by Gregorian year and starts from FirstGregorianYear.
            // So we need to convert year (Hebrew year value) to Gregorian Year below.
            return (m_HebrewTable[(year - HebrewYearOf1AD - FirstGregorianTableYear) * 2 + 1]);
        }

        /// <summary>返回指定纪元中指定年份的天数。</summary>
        /// <returns>指定纪元中指定年份的天数。</returns>
        /// <param name="year">表示年份的整数。</param>
        /// <param name="era">表示纪元的整数。指定 <see cref="F:System.Globalization.HebrewCalendar.HebrewEra" /> 或 HebrewCalendar.Eras[Calendar.CurrentEra]。</param>
        /// <exception cref="T:System.ArgumentOutOfRangeException">
        /// <paramref name="year" /> 或 <paramref name="era" /> 超出了当前 <see cref="T:System.Globalization.HebrewCalendar" /> 对象支持的范围。</exception>
        public override int GetDaysInYear(int year, int era)
        {
            HebrewCalendar.CheckEraRange(era);
            int hebrewYearType = HebrewCalendar.GetHebrewYearType(year, era);

            if (hebrewYearType < 4)
            {
                return(352 + hebrewYearType);
            }
            return(382 + (hebrewYearType - 3));
        }