System.Runtime.Serialization.XmlSerializableServices.ReadNodes C# (CSharp) Method

        public static XmlNode[] ReadNodes(XmlReader xmlReader)
        {
            if (xmlReader == null)
                throw System.Runtime.Serialization.DiagnosticUtility.ExceptionUtility.ThrowHelperArgumentNull(nameof(xmlReader));
            XmlDocument doc = new XmlDocument();
            List<XmlNode> nodeList = new List<XmlNode>();
            if (xmlReader.MoveToFirstAttribute())
            {
                do
                {
                    if (IsValidAttribute(xmlReader))
                    {
                        XmlNode node = doc.ReadNode(xmlReader);
                        if (node == null)
                            throw System.Runtime.Serialization.DiagnosticUtility.ExceptionUtility.ThrowHelperError(XmlObjectSerializer.CreateSerializationException(SR.UnexpectedEndOfFile));
                        nodeList.Add(node);
                    }
                } while (xmlReader.MoveToNextAttribute());
            }
            xmlReader.MoveToElement();
            if (!xmlReader.IsEmptyElement)
            {
                int startDepth = xmlReader.Depth;
                xmlReader.Read();
                while (xmlReader.Depth > startDepth && xmlReader.NodeType != XmlNodeType.EndElement)
                {
                    XmlNode node = doc.ReadNode(xmlReader);
                    if (node == null)
                        throw System.Runtime.Serialization.DiagnosticUtility.ExceptionUtility.ThrowHelperError(XmlObjectSerializer.CreateSerializationException(SR.UnexpectedEndOfFile));
                    nodeList.Add(node);
                }
            }
            return nodeList.ToArray();
        }

        internal static object ReadIXmlSerializable(XmlSerializableReader xmlSerializableReader, XmlReaderDelegator xmlReader, XmlDataContract xmlDataContract, bool isMemberType)
        {
            object obj = null;

            xmlSerializableReader.BeginRead(xmlReader);
            if (isMemberType && !xmlDataContract.HasRoot)
            {
                xmlReader.Read();
                xmlReader.MoveToContent();
            }
            if (xmlDataContract.UnderlyingType == Globals.TypeOfXmlElement)
            {
                if (!xmlReader.IsStartElement())
                {
                    throw DiagnosticUtility.ExceptionUtility.ThrowHelperError(CreateUnexpectedStateException(XmlNodeType.Element, xmlReader));
                }
                XmlDocument xmlDoc = new XmlDocument();
                obj = (XmlElement)xmlDoc.ReadNode(xmlSerializableReader);
            }
            else if (xmlDataContract.UnderlyingType == Globals.TypeOfXmlNodeArray)
            {
                obj = XmlSerializableServices.ReadNodes(xmlSerializableReader);
            }
            else
            {
                IXmlSerializable xmlSerializable = xmlDataContract.CreateXmlSerializableDelegate();
                xmlSerializable.ReadXml(xmlSerializableReader);
                obj = xmlSerializable;
            }
            xmlSerializableReader.EndRead();
            return(obj);
        }