System.Xml.Xsl.XPath.XPathQilFactory.TryEnsureNodeSet C# (CSharp) Method

        public QilNode TryEnsureNodeSet(QilNode n)
        {
            if (n.XmlType.IsNode && n.XmlType.IsNotRtf)
            {
                return n;
            }
            if (CannotBeNodeSet(n))
            {
                return null;
            }

            // Ensure it is not an Rtf at runtime
            return InvokeEnsureNodeSet(n);
        }