private void addAttachment(AttachmentFile file) { var pdfDictionary = new PdfDictionary(); pdfDictionary.Put(PdfName.MODDATE, new PdfDate(DateTime.Now)); var fs = PdfFileSpecification.FileEmbedded(_writer, string.Empty, file.FileName, file.Content, true, null, pdfDictionary); _writer.AddFileAttachment(fs); }