title: ITextSharp insert text to an existing pdf
body: <p>The title sums it all.</p>
  
  <p>I want to add a text to an existing PDF file using <a href="http://sourceforge.net/projects/itextsharp/" rel="noreferrer">iTextSharp</a>, however i can't find how to do it anywhere in the web...</p>
  
  <p>PS: I cannot use PDF forms.</p>