How to export data to Excel/CSV file in ASP.NET

How to export data to Excel/CSV file in ASP.NET 

        protected void Page_Load(object sender, EventArgs e)
        {
            Response.Clear();
            Response.Buffer = true;
            Response.ContentType = "application/vnd.ms-excel";
            Response.AddHeader("content-disposition", "attachment;filename=Attendees.csv");
            Response.Charset = "";
            Response.Write("Header\r\nContentetc.");
            Response.End();
        }