title: How to save (and retrieve) NSAttributedString in a NSDictionary
body: <p>I am trying to save and retrieve XML data to a file. </p>
  
  <p>For this purpose I am using <code>NSDictionary</code>'s <code>writeToFile:</code><br>
  The question is, how to write and retrieve an attributed string to and from a file on disk using <code>NSDictionary</code>'s <code>writeToFile:</code>?</p>