private void SendCSV(int ID)
{
var vouchers = new Voucher().GetList(ID);
var parent = vouchers.First(v => v.ID == ID);
Response.Clear();
Response.ClearHeaders();
Response.ClearContent();
Response.AddHeader("content-disposition", string.Format("attachment; filename={0}.csv", parent.Caption));
Response.ContentType = "text/csv";
Response.AddHeader("Pragma", "public");
var sb = new StringBuilder();
vouchers.Select(v => v.Caption).ToList().ForEach(s => sb.AppendLine(s));
Response.Write(sb.ToString());
Response.End();
}