NET - Explain how to write data to an XML file

XmlTextWriter writer = new XmlTextWriter(@"c:\abc.xml", null);

//Write the root element
writer.WriteStartElement("root");

//Write sub-elements
writer.WriteElementString("one", "node1");
writer.WriteElementString("two", "node2");

// end the root element
writer.WriteEndElement();

//Write the XML to file and close the writer
writer.Close();