XML VB.Net

Imports System
Imports System.Xml
Imports System.Xml.XPath
Public Class MainClass
    Public Shared Sub Main()
        Dim document As XmlDocument = New XmlDocument()
        document.Load("domainBooks.xml")
        Dim navigator As XPathNavigator = document.CreateNavigator()
        
        Dim manager As XmlNamespaceManager = New XmlNamespaceManager(document.NameTable)
        manager.AddNamespace("bk", "http://www.domain.com/books")
        
        Dim first As XPathNavigator = navigator.SelectSingleNode("/bk:bookstore/bk:book[1]", manager)
        Dim last As XPathNavigator = navigator.SelectSingleNode("/bk:bookstore/bk:book[2]", manager)
        
        navigator.MoveTo(first)
        Dim newRange As XmlWriter = navigator.ReplaceRange(last)
        newRange.WriteStartElement("book")
        newRange.WriteAttributeString("genre", "")
        newRange.WriteAttributeString("publicationdate", "2005-04-07")
        newRange.WriteAttributeString("ISBN", "0")
        newRange.WriteStartElement("title")
        newRange.WriteString("New Book")
        newRange.WriteEndElement()
        newRange.WriteStartElement("author")
        newRange.WriteStartElement("first-name")
        newRange.WriteString("First Name")
        newRange.WriteEndElement()
        newRange.WriteStartElement("last-name")
        newRange.WriteString("Last Name")
        newRange.WriteEndElement()
        newRange.WriteEndElement()
        newRange.WriteElementString("price", "$0.00")
        newRange.WriteEndElement()
        newRange.Close()
        Console.WriteLine(navigator.OuterXml)
    End Sub
End Class