title: Free library to import FDF into PDF
body: <p>I am trying to save a <strong>PDF</strong> file by saving the data from the <strong>FDF</strong> into a <strong>PDFTemplate</strong>, in my <strong>WPF</strong> application.</p>
  
  <p>So, the situation is like this. I have a <strong>PDFTemplate.pdf</strong> which serves as a template and has placeholders (or fields). Now I generate this <strong>FDF</strong> file pro-grammatically, which in turn contain all the field names required for the <strong>PDFTemplate</strong> to be filled in. Also, this <strong>FDF</strong> contains the file path for the <strong>PDFTemaplte</strong> also, so that on opening, it knows which <strong>PDF</strong> to use.</p>
  
  <p>Now, when try and double click on the <strong>FDF</strong>, it open the <strong>Adober Acrobat Reader</strong> and displays the <strong>PDFTemplate</strong> with the data filled in. But I can't save this file using the File menu, as it says this file will be saved without the data.</p>
  
  <p>I would like to know if it is possible to import the <strong>FDF</strong> data into <strong>PDF</strong> and save it without using a thrid party component. </p>
  
  <p>Also, if it is very difficult to do this, what would be the possible solution in terms of a free library that would be able to do it?</p>
  
  <p>I just realized that <strong>iTextSharp</strong> is not free for commercial applications.</p>