title: Merging PowerPoint slides using OpenXML
body: <p>All I want to do is merge some slides into a master presentation using OpenXML SDK, I don't want to use Introp as it's not ideal in a server environment, I've tried many code samples but the merged presentation always shows me repair message, when I compared the corrupted file with the repaired one I found out that the ids aren't generated correctly.</p>
  
  <p>Is there any open source library or sample code that actually works. I've heard of Aspose but it's a paid library.      </p>