How do I use XPathNodeIterator to iterate through a list of items in an XML file?

<HostCollection>
  <ApplicationInfo />
  <Hosts>
    <Host>
      <Name>Test</Name>
      <IP>192.168.1.1</IP>
    </Host>
    <Host>
      <Name>Test</Name>
      <IP>192.168.1.2</IP>
    </Host>
  </Hosts>
</HostCollection>

Dim doc As XmlDocument = New XmlDocument()
doc.Load("hosts.xml")
Dim nodeList as XmlNodeList
nodeList = doc.SelectNodes("/HostCollectionInfo/Hosts/Host")

XPathDocument xpathDoc;
        using (StreamReader input = ...)
        {
            xpathDoc = new XPathDocument(input);
        }

        XPathNavigator nav = xpathDoc.CreateNavigator();
        XmlNamespaceManager nsmgr = new XmlNamespaceManager(nav.NameTable);

        XPathNodeIterator nodes = nav.Select("/HostCollection/Hosts/Host", nsmgr);

        while (nodes.MoveNext())
        {
           // access the current Host with nodes.Current
        }