System.Xml.XmlDocument.AddXmlName C# (CSharp) Method

        internal XmlName AddXmlName(string prefix, string localName, string namespaceURI, IXmlSchemaInfo schemaInfo)
        {
            XmlName n = _domNameTable.AddName(prefix, localName, namespaceURI, schemaInfo);
            Debug.Assert((prefix == null) ? (n.Prefix.Length == 0) : (prefix == n.Prefix));
            Debug.Assert(n.LocalName == localName);
            Debug.Assert((namespaceURI == null) ? (n.NamespaceURI.Length == 0) : (n.NamespaceURI == namespaceURI));
            return n;
        }

        private XmlNode LoadNode(bool skipOverWhitespace)
        {
            XmlReader      r      = _reader;
            XmlNode        parent = null;
            XmlElement     element;
            IXmlSchemaInfo schemaInfo;

            do
            {
                XmlNode node = null;
                switch (r.NodeType)
                {
                case XmlNodeType.Element:
                    bool fEmptyElement = r.IsEmptyElement;
                    element         = _doc.CreateElement(r.Prefix, r.LocalName, r.NamespaceURI);
                    element.IsEmpty = fEmptyElement;

                    if (r.MoveToFirstAttribute())
                    {
                        XmlAttributeCollection attributes = element.Attributes;
                        do
                        {
                            XmlAttribute attr = LoadAttributeNode();
                            attributes.Append(attr);     // special case for load
                        }while (r.MoveToNextAttribute());
                        r.MoveToElement();
                    }

                    // recursively load all children.
                    if (!fEmptyElement)
                    {
                        if (parent != null)
                        {
                            parent.AppendChildForLoad(element, _doc);
                        }
                        parent = element;
                        continue;
                    }
                    else
                    {
                        schemaInfo = r.SchemaInfo;
                        if (schemaInfo != null)
                        {
                            element.XmlName = _doc.AddXmlName(element.Prefix, element.LocalName, element.NamespaceURI, schemaInfo);
                        }
                        node = element;
                        break;
                    }

                case XmlNodeType.EndElement:
                    if (parent == null)
                    {
                        return(null);
                    }
                    Debug.Assert(parent.NodeType == XmlNodeType.Element);
                    schemaInfo = r.SchemaInfo;
                    if (schemaInfo != null)
                    {
                        element = parent as XmlElement;
                        if (element != null)
                        {
                            element.XmlName = _doc.AddXmlName(element.Prefix, element.LocalName, element.NamespaceURI, schemaInfo);
                        }
                    }
                    if (parent.ParentNode == null)
                    {
                        return(parent);
                    }
                    parent = parent.ParentNode;
                    continue;

                case XmlNodeType.EntityReference:
                    node = LoadEntityReferenceNode(false);
                    break;

                case XmlNodeType.EndEntity:
                    Debug.Assert(parent == null);
                    return(null);

                case XmlNodeType.Attribute:
                    node = LoadAttributeNode();
                    break;

                case XmlNodeType.Text:
                    node = _doc.CreateTextNode(r.Value);
                    break;

                case XmlNodeType.SignificantWhitespace:
                    node = _doc.CreateSignificantWhitespace(r.Value);
                    break;

                case XmlNodeType.Whitespace:
                    if (_preserveWhitespace)
                    {
                        node = _doc.CreateWhitespace(r.Value);
                        break;
                    }
                    else if (parent == null && !skipOverWhitespace)
                    {
                        // if called from LoadEntityReferenceNode, just return null
                        return(null);
                    }
                    else
                    {
                        continue;
                    }

                case XmlNodeType.CDATA:
                    node = _doc.CreateCDataSection(r.Value);
                    break;


                case XmlNodeType.XmlDeclaration:
                    node = LoadDeclarationNode();
                    break;

                case XmlNodeType.ProcessingInstruction:
                    node = _doc.CreateProcessingInstruction(r.Name, r.Value);
                    break;

                case XmlNodeType.Comment:
                    node = _doc.CreateComment(r.Value);
                    break;

                case XmlNodeType.DocumentType:
                    node = LoadDocumentTypeNode();
                    break;

                default:
                    throw UnexpectedNodeType(r.NodeType);
                }

                Debug.Assert(node != null);
                if (parent != null)
                {
                    parent.AppendChildForLoad(node, _doc);
                }
                else
                {
                    return(node);
                }
            }while (r.Read());

            // when the reader ended before full subtree is read, return whatever we have created so far
            if (parent != null)
            {
                while (parent.ParentNode != null)
                {
                    parent = parent.ParentNode;
                }
            }
            return(parent);
        }