Create PDF Dynamically and Download PDF from server side using iTextsharp

 MemoryStream MStream = new MemoryStream();

  Document document = new Document(PageSize.A4, 80, 50, 30, 65);

        try

        {

            PdfWriter writer = PdfWriter.GetInstance(document, MStream);

            document.Open();

            document.Add(new iTextSharp.text.Paragraph("This is test and must work"));

            document.Close();

        }

        catch (Exception e)

        {

            throw e;

        }

        HttpContext.Current.Response.Buffer = true;

        HttpContext.Current.Response.ClearContent();

        HttpContext.Current.Response.ClearHeaders();

        HttpContext.Current.Response.ContentType = "application/pdf";

        HttpContext.Current.Response.AddHeader("Content-Disposition", "attachment;filename=myPDFNew.pdf");

        HttpContext.Current.Response.BinaryWrite(MStream.GetBuffer());

        HttpContext.Current.Response.End();