Unnamed

StringBuilder sb = new StringBuilder(215);
            sb.AppendFormat("BEGIN:VCALENDAR{0}", Environment.NewLine);
            sb.AppendFormat("CALSCALE:GREGORIAN{0}", Environment.NewLine);
            sb.AppendFormat("VERSION:1.0{0}", Environment.NewLine);
            sb.AppendFormat("BEGIN:VEVENT{0}", Environment.NewLine);
            sb.AppendFormat("DTSTART:20080703T093000{0}", Environment.NewLine);
            sb.AppendFormat("DTEND:20080703T113000{0}", Environment.NewLine);
            sb.AppendFormat("LOCATION:testing some locationşş{0}", Environment.NewLine);
            sb.AppendFormat("SUMMARY:Testing Some subject{0}", Environment.NewLine);
            sb.AppendFormat("CLASS:PUBLIC{0}", Environment.NewLine);
            sb.AppendFormat("END:VEVENT{0}", Environment.NewLine);
            sb.AppendFormat("END:VCALENDAR{0}", Environment.NewLine);

            UTF8Encoding enc = new UTF8Encoding();
            byte[] arrBytData = enc.GetBytes(sb.ToString());

            Response.Clear();
            Response.ContentType = "text/plain";
            Response.AppendHeader("Content-Disposition", "attachment; filename=vCalendar.ics");
            Response.AppendHeader("Content-Length", arrBytData.Length.ToString());
            Response.ContentType = "application/octet-stream";
            Response.BinaryWrite(arrBytData);
            Response.Flush();
            Response.End();