title: Add Information To XML file in C#
body: <p>Say I have an XML Document that looks like this:</p>
  
  <pre><code> &lt;BOOK&gt;
    &lt;NAME&gt;Home&lt;/NAME&gt;
    &lt;ISBN&gt;0-943396-04-2&lt;/ISBN&gt;
    &lt;PRICE&gt;$0.82&lt;/PRICE&gt;
   &lt;/BOOK&gt;
  </code></pre>
  
  <p>And I have a program that has the purpose of allowing the user to add another book to the list... what code would I put on the Button I have titled "Add Book" to make it add another set of information?</p>
  
  <p>So the end product would look like this:</p>
  
  <pre><code> &lt;BOOK&gt;
    &lt;NAME&gt;Home&lt;/NAME&gt;
    &lt;ISBN&gt;0-943396-04-2&lt;/ISBN&gt;
    &lt;PRICE&gt;$0.82&lt;/PRICE&gt;
   &lt;/BOOK&gt;
   &lt;BOOK&gt;
    &lt;NAME&gt;Work&lt;/NAME&gt;
    &lt;ISBN&gt;0-85131-041-9&lt;/ISBN&gt;
    &lt;PRICE&gt;$0.99&lt;/PRICE&gt;
   &lt;/BOOK&gt;
  </code></pre>
  
  <p>I am using Microsoft Visual C# 2010 Express, if that helps.</p>