How to add node with hyperlink in xml file

// Create an XML document instance, and load XML data.
            XmlDocument doc = new XmlDocument();
            doc.Load(Server.MapPath(".") + @"\test17.xml");                      // This code assumes that the XML file is in the same folder.


        //http://support.microsoft.com/kb/317664
          //http://support.microsoft.com/kb/317666
          // A. Addition
          // 1. Create a new item element.
          XmlElement newElem = doc.CreateElement("item");


          // Create the child nodes. This code demonstrates various ways to add them.
          newElem.InnerXml = "<title></title><link></link><description></description><pubdate></pubdate>";
          newElem["link"].InnerText = "title";
          newElem["link"].InnerText = "url";
          newElem["description"].InnerText = "<![CDATA[ " + "strdes" + " ";
          newElem["pubDate"].InnerText = System.DateTime.Now.ToString("r");


          // 2.  Add the new element to the end of the item list.
          doc.DocumentElement.SelectNodes("/rss/channel")[0].AppendChild(newElem);


          // 3. Save the modified XML to a file in Unicode format.
          doc.PreserveWhitespace = true;
          XmlTextWriter wrtr = new XmlTextWriter(@"c:\test.xml", System.Text.Encoding.Unicode);
          doc.WriteTo(wrtr);
          wrtr.Close();