// C#

// customerlist2.cs
using System;
using System.Xml;
using System.IO;

namespace Wrox
{
   class consoleApp
   {
      static void Main(string[] args)
      {
         XmlDocument myDocument = new XmlDocument();
         FileStream myStream = 
                   new FileStream("customerlist2.xml", FileMode.Open);
         myDocument.Load(myStream);
         XmlNodeList zipValues = 
                     myDocument.SelectNodes("//customer/postalCode/text()");
         for(int i=0; i<zipValues.Count; i++)
            zipValues[i].Value = zipValues[i].Value + "-0000";
         myDocument.Save("customerlist3.xml");
         myStream.Close(); 
      }
   }
}