System.Xml.Xsl.XsltOld.Compiler.LoadDocument C# (CSharp) Method

        internal static XPathDocument LoadDocument(XmlTextReaderImpl reader)
        {
            reader.EntityHandling = EntityHandling.ExpandEntities;
            reader.XmlValidatingReaderCompatibilityMode = true;
            try
            {
                return new XPathDocument(reader, XmlSpace.Preserve);
            }
            finally
            {
                reader.Close();
            }
        }

        internal XPathNavigator GetNavigator(Uri ruri)
        {
            XPathNavigator?result = null;

            if (_documentCache != null)
            {
                result = _documentCache[ruri] as XPathNavigator;
                if (result != null)
                {
                    return(result.Clone());
                }
            }
            else
            {
                _documentCache = new Hashtable();
            }

            object?input = _resolver.GetEntity(ruri, null, null);

            if (input is Stream)
            {
                XmlTextReaderImpl tr = new XmlTextReaderImpl(ruri.ToString(), (Stream)input);
                {
                    tr.XmlResolver = _resolver;
                }
                // reader is closed by Compiler.LoadDocument()
                result = ((IXPathNavigable)Compiler.LoadDocument(tr)).CreateNavigator();
            }
            else if (input is XPathNavigator)
            {
                result = (XPathNavigator)input;
            }
            else
            {
                throw XsltException.Create(SR.Xslt_CantResolve, ruri.ToString());
            }

            _documentCache[ruri] = result !.Clone();
            return(result);
        }