You will have to write the whole Xml document, i.e. all elements and attributes and attribute values by using the XmlTextWriter
. After you've written the <Content>
element, you can write your additional element.
Something like this:
writer.WriteStartDocument();
writer.WriteStartElement("Book");
writer.WriteStartElement("Title");
writer.WriteString("Title");
writer.WriteEndElement();
writer.WriteStartElement("Content");
writer.WriteString("Content");
writer.WriteEndElement();
// insert your new data here
writer.WriteEndElement();
writer.WriteEndDocument();