title: Concatenate PDF files and insert a page into a PDF File
body: <p>I’ve got this new task of creating a web app (I will use Asp.net + C#):
  •   The customer gives us an X number of PDF files everyday (x will be different from day to day)
  •   My application will need to take this PDF files and insert a blank page after page #3 (not each 3 pages, just after page #3) of each PDF file and then concatenate all of those PDF files them into one large PDF file.
  I was thinking about using Aspose, since it seems like it can concatenate pdf files, but i will have to check if it can also insert a page inside a pdf file.</p>
  
  <p>Are there any other plugins , webservices, code behind  or even a technique that you are aware that does just that ?</p>