protected void btnExcel_Click(object sender, EventArgs e)
        {
            var todos = PaisAppService.ObterTodos();

            ManualMapper.PaisMapper mapper = new ManualMapper.PaisMapper();

            var paisesDTO = mapper.MapDTO(todos);

            var excelExport = new ExcelExport("teste.xlsx");

            excelExport.CreateInMemory(paisesDTO, "Teste123");

            Response.ContentType = "application/vnd.openxmlformats-officedocument.spreadsheetml.sheet";
            Response.AddHeader("content-disposition", "attachment;  filename=DetailReport.xlsx");
            Response.BinaryWrite(excelExport.GetByteArray());
        }