this.Response.Clear();
            this.Response.ClearContent();
            this.Response.ClearHeaders();
            Response.ContentType = "text/csv";
            Response.AddHeader("content-disposition", "attachment;
 filename=" + "Unicode_CSV_Demo.csv");

            DemoCSVcls DemoCSVcls = new DemoCSVcls();
            List<DemoCSVcls> CSVTextList = new List<DemoCSVcls>();
            DemoCSVcls.Text1 = "‘tipping off’";
            DemoCSVcls.Text2 = "ʼ";
            CSVTextList.Add(DemoCSVcls);

            var engine = new FileHelperEngine<DemoCSVcls>(Encoding.UTF8);
            string finalString = engine.WriteString(CSVTextList);
            Response.BufferOutput = true;
            Response.Write(finalString);
            Response.Flush();
            Response.End();