System.Xml.XmlDictionaryWriter.WriteNode C# (CSharp) Method

        public virtual void WriteNode(XmlDictionaryReader reader, bool defattr)
        {
            if (reader == null)
                throw System.Runtime.Serialization.DiagnosticUtility.ExceptionUtility.ThrowHelperError(new ArgumentNullException(nameof(reader)));
            int d = (reader.NodeType == XmlNodeType.None ? -1 : reader.Depth);
            do
            {
                XmlNodeType nodeType = reader.NodeType;
                Type type;
                if (nodeType == XmlNodeType.Text || nodeType == XmlNodeType.Whitespace || nodeType == XmlNodeType.SignificantWhitespace)
                {
                    // This will advance if necessary, so we don't need to call Read() explicitly
                    WriteTextNode(reader, false);
                }
                else if (reader.Depth > d && reader.IsStartArray(out type))
                {
                    WriteArrayNode(reader, type);
                }
                else
                {
                    // These will not advance, so we must call Read() explicitly
                    switch (nodeType)
                    {
                        case XmlNodeType.Element:
                            WriteElementNode(reader, defattr);
                            break;
                        case XmlNodeType.CDATA:
                            WriteCData(reader.Value);
                            break;
                        case XmlNodeType.EntityReference:
                            WriteEntityRef(reader.Name);
                            break;
                        case XmlNodeType.XmlDeclaration:
                        case XmlNodeType.ProcessingInstruction:
                            WriteProcessingInstruction(reader.Name, reader.Value);
                            break;
                        case XmlNodeType.DocumentType:
                            WriteDocType(reader.Name, reader.GetAttribute("PUBLIC"), reader.GetAttribute("SYSTEM"), reader.Value);
                            break;
                        case XmlNodeType.Comment:
                            WriteComment(reader.Value);
                            break;
                        case XmlNodeType.EndElement:
                            WriteFullEndElement();
                            break;
                    }
                    if (!reader.Read())
                        break;
                }
            }
            while (d < reader.Depth || (d == reader.Depth && reader.NodeType == XmlNodeType.EndElement));
        }

		protected override void OnWriteBodyContents (
			XmlDictionaryWriter writer)
		{
			if (reader == null && String.IsNullOrEmpty (xml))
				return;
			XmlReader r = reader ?? XmlReader.Create (new StringReader (xml));
			r.MoveToContent ();
			writer.WriteNode (r, false);
		}