Create Arraylist in Xml

Hi

Does anybody knows how to create a arraylist in the xml files using VB.NET..

That means a lists of tags repeat again and again....

I create two textbox for the user to key in and saved to Xml files...

But if that user want to key in again.....how to make it append to the xml file....

Code:

---

<Person>

  ' first set of info save to xml   
    <Item>Pen</Item>           
  <Amount>2</Amount>

  'second set of info save in xml
  <Item>Pencil</Item>
  <Amount>4</Amount>
  </Person>

---

Thanks