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

        public override DateTime ToDateTime(int year, int month, int day, int hour, int minute, int second, int millisecond, int era) {
            if (day >= 1 && day <= 29)
            {
                CheckYearMonthRange(year, month, era);
                goto DayInRang;
            }

            // The year/month/era value checking is done in GetDaysInMonth().
             int daysInMonth = GetDaysInMonth(year, month, era);

             if (day < 1 || day > daysInMonth) {
                 BCLDebug.Log("year = " + year + ", month = " + month + ", day = " + day);
                 throw new ArgumentOutOfRangeException(
                            "day",
                            String.Format(
                                CultureInfo.CurrentCulture,
                                Environment.GetResourceString("ArgumentOutOfRange_Day"),
                                daysInMonth,
                                month));
             }
DayInRang:
            long lDate = GetAbsoluteDateUmAlQura(year, month, day);

            if (lDate >= 0) {
                return (new DateTime(lDate * GregorianCalendar.TicksPerDay + TimeToTicks(hour, minute, second, millisecond)));
            } else {
                throw new ArgumentOutOfRangeException(null, Environment.GetResourceString("ArgumentOutOfRange_BadYearMonthDay"));
            }
        }

        public static DateTime?ToHijriDateTimeObject(this string date)
        {
            if (string.IsNullOrEmpty(date.Trim()))
            {
                return(null);
            }
            string[] DateParts = date.Split('/');
            var      umAlQura  = new System.Globalization.UmAlQuraCalendar();

            return(umAlQura.ToDateTime(int.Parse(DateParts[2]), int.Parse(DateParts[1]), int.Parse(DateParts[0]), 0, 0, 0, 0));
        }