Traverse an XML Document Produce a namespacemanager

using System;
using System.Collections.Generic;
using System.Text;
using System.Xml;

namespace xpath
{
    class XmlTraverser
    {
        private XmlDocument doc;
        private XmlNamespaceManager nmgr;
        public XmlNamespaceManager getXmlNamespaceManager(){
            return nmgr;
        }
        public XmlTraverser(XmlDocument doc)
        {
            this.doc = doc;
            XmlNode node = doc.DocumentElement;
            nmgr = new XmlNamespaceManager(doc.NameTable);
              
            
            traverseDocument(node, "", nmgr);
            ShowAllNamespaces(nmgr);

           
        }

        private void traverseDocument(XmlNode node, string path, XmlNamespaceManager nmgr)
        {
            path += "/" + node.Name;
            
            
            if (node.HasChildNodes)
            {
                foreach (XmlAttribute att in node.Attributes)
                {

                    if (att.Name.StartsWith("xmlns"))
                    {
                        string[] splitString = att.Name.Split(new Char[] { ':' });
                        nmgr.AddNamespace(splitString[1], att.InnerText);
                        

                    }
                    Console.WriteLine(att.Name + " == " + att.InnerText);
                }
            
               
                foreach (XmlNode childNode in node.ChildNodes)
                {
                    if (!childNode.HasChildNodes)
                    {


                        
                        
                        Console.WriteLine(path + " = "+childNode.InnerText);
                    }
                    traverseDocument(childNode, path, nmgr);
                }
            }
           
        }
        private void ShowAllNamespaces(XmlNamespaceManager nsmgr)
        {
            do
            {
                Console.WriteLine("popedScope");
                foreach (String prefix in nsmgr)
                {
                    Console.WriteLine("Prefix={0}, Namespace={1}", prefix, nsmgr.LookupNamespace(prefix));
                }
            }
            while (nsmgr.PopScope());
        }

    }
}
Usage
static void Main(string[] args)
        {
            XmlDocument doc = new XmlDocument();
            doc.Load(@"c:\Data\adrian\adrian.xml");
            XmlTraverser xmlTraverser = new XmlTraverser(doc);
            XmlNamespaceManager mgr = xmlTraverser.getXmlNamespaceManager();
            XmlNodeList nodes = doc.SelectNodes("/ns5:dataItemInstance[ns6:id/ns6:id=16100 and ns6:id/ns6:version=1]/ns5:relatedDIT/ns7:id/text()", mgr);
            foreach (XmlNode node in nodes)
            {
                Console.WriteLine("Got here");
                Console.WriteLine(node.InnerText);
            }
            Console.Read();

        }