public FileContentResult ExportList(int?id) { var generatedList = dbNew.RetrieveLists.Find(id); if (generatedList != null) { var contacts = PlatformHelper.GetContactsByIds(dbNew, generatedList.ContactsIds.Split(',')); var csvString = PlatformHelper.GenerateCSVString(contacts); var fileName = generatedList.Name + " " + DateTime.UtcNow.ToString() + ".csv"; return(File(new System.Text.UTF8Encoding().GetBytes(csvString), "text/csv", fileName)); } return(null); }