Data at the root level is invalid. Line 1, position 1.

string confirmValue = Request.Form["confirm_value"];
           if (confirmValue == "Yes")
           {

               string sPathToWritePdfTo = @"C:\new_pdf_name.pdf";


               System.Text.StringBuilder sbHtml = new System.Text.StringBuilder();
               sbHtml.Append("Contractor1.aspx");




               using (System.IO.Stream stream = new System.IO.FileStream(sPathToWritePdfTo, System.IO.FileMode.OpenOrCreate))
               {

                   Pdfizer.HtmlToPdfConverter htmlToPdf = new Pdfizer.HtmlToPdfConverter();

                   htmlToPdf.Open(stream);

                   htmlToPdf.Run(sbHtml.ToString());

                   htmlToPdf.AddChapter("Mobily");

                   htmlToPdf.Close();
               }


               HttpContext.Current.Response.Clear();

               HttpContext.Current.Response.AddHeader("content-disposition", string.Format("attachment; filename={0}", "mobily.pdf"));

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



               HttpContext.Current.Response.WriteFile(sPathToWritePdfTo);

               HttpContext.Current.Response.End();

           }