System.Xml.Xsl.XsltOld.PrefixQName.ParseNCName C# (CSharp) Method

        private static string ParseNCName(string qname, ref int position) {
            int qnameLength = qname.Length;
            int nameStart = position;
            XmlCharType xmlCharType = XmlCharType.Instance;

            if (
                qnameLength == position ||                           // Zero length ncname
                ! xmlCharType.IsStartNCNameChar(qname[position])     // Start from invalid char
            ) {
                throw XsltException.Create(Res.Xslt_InvalidQName, qname);
            }

            position ++;

            while (position < qnameLength && xmlCharType.IsNCNameChar(qname[position])) {
                position ++;
            }

            return qname.Substring(nameStart, position - nameStart);
        }