public static byte[] AddTermOfAgreement(byte[] pdfIn, string algemeneVoorwaardenPdfPath)
        {
            string tmpFile = System.IO.Path.GetTempFileName() + ".pdf";

            using (MemoryStream newStream = new MemoryStream())
            {
                iTextSharp.text.Document document = new iTextSharp.text.Document(PageSize.A4);
                PdfWriter writer = PdfWriter.GetInstance(document, newStream);
                document.Open();
                PdfContentByte cb = writer.DirectContent;
                PdfImportedPage page = default(PdfImportedPage);
                int rotation = 0;
                PdfReader reader1 = new PdfReader(pdfIn);
                PdfReader reader2 = new PdfReader(algemeneVoorwaardenPdfPath);


                int pageCount1 = reader1.NumberOfPages;

                for (int i = 1; i <= pageCount1; i++)
                {
                    document.SetPageSize(reader1.GetPageSizeWithRotation(i));
                    document.NewPage();
                    page = writer.GetImportedPage(reader1, i);
                    rotation = reader1.GetPageRotation(i);
                    if (rotation == 90 || rotation == 270)
                    {
                        cb.AddTemplate(page, 0, -1f, 1f, 0, 0, reader1.GetPageSizeWithRotation(i).Height);
                    }
                    else
                    {
                        cb.AddTemplate(page, 1f, 0, 0, 1f, 0, 0);
                    }
                }

                int pageCount2 = reader2.NumberOfPages;

                for (int i = 1; i <= pageCount2; i++)
                {
                    document.SetPageSize(reader2.GetPageSizeWithRotation(i));
                    document.NewPage();
                    page = writer.GetImportedPage(reader2, i);
                    rotation = reader2.GetPageRotation(i);
                    if (rotation == 90 || rotation == 270)
                    {
                        cb.AddTemplate(page, 0, -1f, 1f, 0, 0, reader2.GetPageSizeWithRotation(i).Height);
                    }
                    else
                    {
                        cb.AddTemplate(page, 1f, 0, 0, 1f, 0, 0);
                    }
                }
                document.Close();

                return newStream.ToArray();
            }
        }