System.Globalization.UmAlQuraCalendar.ConvertHijriToGregorian C# (CSharp) Method

        void ConvertHijriToGregorian(int HijriYear, int HijriMonth, int HijriDay, ref int yg, ref int mg, ref int dg)
        {
            BCLDebug.Assert( (HijriYear >= MinCalendarYear) && (HijriYear <= MaxCalendarYear), "Hijri year is out of range.");
            BCLDebug.Assert( HijriMonth >= 1, "Hijri month is out of range.");
            BCLDebug.Assert( HijriDay >= 1, "Hijri day is out of range.");
            int index, b, nDays = HijriDay-1;
            DateTime dt;
			

            index = HijriYear - MinCalendarYear;
            dt = HijriYearInfo[index].GregorianDate;


            b = HijriYearInfo[index].HijriMonthsLengthFlags;

            for(int m = 1; m < HijriMonth; m++)
            {
                nDays = nDays+ 29 + (b&1);   /* Add the months lengths before mh */
                b = b >> 1;
            }

            dt = dt.AddDays(nDays);
            yg = dt.Year;
            mg = dt.Month;
            dg = dt.Day;
        }

        // Token: 0x06002ED1 RID: 11985 RVA: 0x000B3BA4 File Offset: 0x000B1DA4
        private static long GetAbsoluteDateUmAlQura(int year, int month, int day)
        {
            int year2  = 0;
            int month2 = 0;
            int day2   = 0;

            UmAlQuraCalendar.ConvertHijriToGregorian(year, month, day, ref year2, ref month2, ref day2);
            return(GregorianCalendar.GetAbsoluteDate(year2, month2, day2));
        }