using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;
using System.Xml;
using System.Xml.XPath;
public class MainClass {
public static void Main() {
XmlDocument doc = new XmlDocument();
doc.Load("books.xml");
XPathNavigator nav = doc.CreateNavigator();
if (nav.CanEdit) {
XPathNodeIterator iter = nav.Select("/bookstore/book/price");
while (iter.MoveNext()) {
iter.Current.InsertAfter("5");
}
}
doc.Save("newbooks.xml");
}
}