title: How can I copy annotations/highlighting from one PDF to an updated version of that PDF?
body: <p>I've recently moved to almost exclusively electronic books. I prefer to mark up documents with highlighting or annotations as I read them.</p>
  
  <p>However, when I get an updated version of a PDF - O'Reilly, for example, will give access to corrected versions of the books you've purchased - I'm then stuck with a marked up older copy and a newer copy, without my notes.</p>
  
  <p>My preferred language being C# I realize that <a href="http://itextpdf.com/" rel="nofollow noreferrer">iTextSharp</a> is probably what I'd need to use if I wanted to programmatically do this (see for example <a href="https://stackoverflow.com/questions/3372606/copy-pdf-annotations-via-c">Copy pdf annotations via C#</a>), but is there an easier way to handle this?</p>
  
  <p>I can't believe I'm the only one with this issue, so is there perhaps already a solution that will handle this for me?</p>