System.DateTimeParse.GetDayOfYM C# (CSharp) Method

        private static Boolean GetDayOfYM(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;
            }

            if (SetDateYMD(ref result, raw.year, raw.month, 1))
            {
                result.flags |= ParseFlags.HaveDate;
                return true;
            }
            result.SetFailure(ParseFailureKind.Format, "Format_BadDateTime", null);
            return false;
        }