System.Xml.Xsl.XPath.XPathQilFactory.InvokeSubstringBefore C# (CSharp) 메소드

        public QilNode InvokeSubstringBefore(QilNode str1, QilNode str2)
        {
            CheckString(str1);
            CheckString(str2);
            return XsltInvokeEarlyBound(QName("substring-before"),
                XsltMethods.SubstringBefore, T.StringX, new QilNode[] { str1, str2 }
            );
        }