byte[] content;

                using (var ms = new MemoryStream())
                {
                    using (var writer = new StreamWriter(ms))
                    {
                        foreach (var movie in movies)
                            writer.WriteLine(movie .ToString());
                    }

                    content = ms.ToArray();
                }

                Response.Buffer = true;
                Response.Charset = "";
                Response.Cache.SetCacheability(HttpCacheability.NoCache);
                Response.ContentType = "text/csv";
                Response.AddHeader("content-disposition", "attachment;filename=tttt.xls".ToString());
                Response.BinaryWrite(content);
                Response.Flush();
                Response.End();