title: How to remove special characters from a XML
body: <p>I have an xml file. I want to remove all of the special characters in it using C#. </p>
  
  <p>The special characters include:</p>
  
  <ol>
  <li><code>+</code></li>
  <li><code>-</code></li>
  <li><code>/</code></li>
  <li><code>_</code></li>
  </ol>
  
  <p>etc.</p>