Aplicacao web C Sharp com impressora ZEBRA

  //
            string pasfilename = string.Empty;
            pasfilename = "ETIQUETA.txt";
            //
            StringBuilder sb = new StringBuilder();
            sb.AppendLine("*FORMAT,ETIQUETALABEL.lwl");
            sb.AppendLine("SERIAL," + serial);//serial
            sb.AppendLine("*QUANTITY," + 1);//quantidade
            sb.AppendLine("*PRINTERNUMBER," + 1);//idImpressora
            sb.AppendLine("*PRINTLABEL");
            //
            byte[] data = new ASCIIEncoding().GetBytes(sb.ToString());

            FileStream fs = new FileStream(@"C:\teste\" + pasfilename, FileMode.Create); //FileStream(ConfigurationManager.AppSettings["destinoArquivo"] + pasfilename, FileMode.Create);

            fs.Write(data, 0, data.Length);
            fs.Close();

            System.IO.File.Copy(@"C:\teste\ETIQUETA.pas", "USB001", true);//LPT1 USB001
            //System.IO.File.Copy(@"C:\teste\ETIQUETA.pas", @"\\127.0.0.1\IMPRESSORA_X", true);

          //  System.IO.File.Delete(@"C:\teste\ETIQUETA.pas");