Set PDF Version using iTextSharp

Question

Anyone know how to save a PDF as a lower PDF version programmatically using iTextSharp so that you can use certain iTextSharp features that require the PDF to be version 5 or lower?

I'm trying to merge two PDF version 7 documents together and it insists that they be version 5 or lower.

Answer 1

///for itextSharp 5.4.4
PdfReader reader = new PdfReader(pdfPath);
PdfStamper stamper = new PdfStamper(reader, outputStream); 
stamper.Writer.setPdfVersion(PdfWriter.PDF_VERSION_1_4); 
stamper.close();