title: Library for creating PowerPoint-Presentations
body: <p>is there a (.net-)library for creating PowerPoint-Presentations (PPTX => OpenXML).
  For creating Excel-sheets I like <a href="http://closedxml.codeplex.com/releases/view/73027" rel="nofollow noreferrer">ClosedXML-Library</a> and would love something similar for PowerPoint.
  I can't and don't want to use Microsoft Interop because it is an ASP.NET Web-App.</p>
  
  <p>Does someone has any experiences creating PowerPoint-Slides in ASP.NET?</p>
  
  <p>P.S.: I had a look at <a href="http://www.aspose.com/categories/.net-components/aspose.slides-for-.net/default.aspx" rel="nofollow noreferrer">Aspose</a> but found it little to expensive.</p>