System.DateTimeParse.GetDayOfNNY C# (CSharp) Method

        private static Boolean GetDayOfNNY(ref DateTimeResult result, ref DateTimeRawInfo raw, DateTimeFormatInfo dtfi) {

            if ((result.flags & ParseFlags.HaveDate) != 0) {
                // Multiple dates in the input string
                result.SetFailure(ParseFailureKind.Format, "Format_BadDateTime", null);
                return false;
            }

            int n1 = raw.GetNumber(0);
            int n2 = raw.GetNumber(1);

            int order;
            if (!GetYearMonthDayOrder(dtfi.ShortDatePattern, dtfi, out order)) {
                result.SetFailure(ParseFailureKind.FormatWithParameter, "Format_BadDatePattern", dtfi.ShortDatePattern);
                return false;
            }

            if (order == ORDER_MDY || order == ORDER_YMD) {
                if (SetDateYMD(ref result, raw.year, n1, n2)) {
                    result.flags |= ParseFlags.HaveDate;
                    return true; // MD + Year
                }
            } else {
                if (SetDateYMD(ref result, raw.year, n2, n1)) {
                    result.flags |= ParseFlags.HaveDate;
                    return true; // DM + Year
                }
            }
            result.SetFailure(ParseFailureKind.Format, "Format_BadDateTime", null);
            return false;
        }