public static void ExportToExcel <T>(string workSheetName, Controller controller, DataManager dataManager)
        {
            var select    = dataManager.GetSelect <T>();
            var dataTable = Repos <T> .Table(select.Select(x => true));

            using (XLWorkbook wb = new XLWorkbook())
            {
                wb.Worksheets.Add(dataTable, workSheetName);

                string myName = controller.Server.UrlEncode("Test" + "_" +
                                                            DateTime.Now.ToShortDateString() + ".xlsx");
                MemoryStream stream = GetStream(wb);// The method is defined below
                controller.Response.Clear();
                controller.Response.Buffer = true;
                controller.Response.AddHeader("content-disposition",
                                              "attachment; filename=" + myName);
                controller.Response.ContentType = "application/vnd.ms-excel";
                controller.Response.BinaryWrite(stream.ToArray());
                controller.Response.End();
            }
        }