Access a string striping out the atributes separately

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C#

ListBox listBox1 = new ListBox();
      1      string fileName = (Server.MapPath("OrgList.xml"));
      2      XPathDocument doc = new XPathDocument(fileName);
      3     XPathNavigator nav = doc.CreateNavigator();
            // Compile a standard XPath expression
      4     XPathExpression expr;
      5      expr = nav.Compile("//DATA_RECORD");
      6     XPathNodeIterator iterator = nav.Select(expr);
            // Iterate on the node set
      7      listBox1.Items.Clear();
            try
            {
                while (iterator.MoveNext())
                {
      8             XPathNavigator nav2 = iterator.Current.Clone();
      9             listBox1.Items.Add(nav2.Value);
                                      
                    
                }
            }
            catch (Exception ex)
            {
                Response.Write(ex.ToString());
            }

In line number 8 XPathNavigator nav2 has a node called DATE_RECORD which has first Name, lastName and an ID as a concatenated string together. I need to access those atributes one by one separately right after the execution of line 8. what member of the XPathNavigator will do that?. I'm stuck on this for almost two days please help.

I just want help on this please I can't go to a diffrenet approach now because its too late for me to do it.