' 导入命名空间
Imports System.Xml

public class Test

  public shared sub Main()

    Dim doc as XmlDocument = new XmlDocument()
    doc.LoadXml("<root>"& _
                "<elem>some text<child/>more text</elem>" & _
                "</root>")

    Dim elem as XmlElement
    elem = CType (doc.DocumentElement.ChildNodes.Item(0), XmlElement)

    ' Note that InnerText does not include the markup.
    Console.WriteLine("Display the InnerText of the element...")
    Console.WriteLine( elem.InnerText )

    ' InnerXml includes the markup of the element.
    Console.WriteLine("Display the InnerXml of the element...")
    Console.WriteLine(elem.InnerXml)

    ' Set InnerText to a string that includes markup.  
    ' The markup is escaped.
    elem.InnerText = "Text containing <markup/> will have char(<) and char(>) escaped."
    Console.WriteLine( elem.OuterXml )

    ' Set InnerXml to a string that includes markup.  
    'The markup is not escaped.
    elem.InnerXml = "Text containing <markup/>."
    Console.WriteLine( elem.OuterXml )
    
  end sub
end class

public class Test
   public Shared Sub Main
        Dim myDoc As New Xml.XmlDocument
        myDoc.Load("test.xml")

        Dim chpts As Xml.XmlNodeList = myDoc.SelectNodes("/book/chapters/chapter")
        For Each nd As Xml.XmlNode In chpts
            Console.WriteLine(nd.Attributes("id").Value)

        Next


        Dim book As Xml.XmlElement
        book = myDoc.Item("book")
        Console.WriteLine("ISBN: " & book.Attributes("isbn").Value)

        Dim title As Xml.XmlElement
        title = book.Item("title")
        Console.WriteLine(title.InnerText)

        Console.WriteLine("Authors:")
        Dim authors As Xml.XmlElement
        authors = book.Item("authors")

        For Each node As Xml.XmlNode In authors.ChildNodes
            If node.Name = "author" Then
                Console.WriteLine(node.InnerText)
            End If
        Next

        Dim chapters As Xml.XmlElement
        chapters = book.Item("chapters")

        For Each node As Xml.XmlNode In chapters.ChildNodes
            If node.Name = "chapter" Then
                Console.WriteLine(node.Attributes("id").Value)
                Console.WriteLine(node.Attributes("topic").Value)
            End If
        Next
   End Sub
End class