public IEnumerable <StockDetail> GetAll() { var result = _stockDAO.GetAllStocks(); if (result.Rows.Count > 0) { return(result.AsEnumerable().Select(row => new StockDetail { Id = row.Field <int>(0), ProductId = row.Field <int>(1), Quantity = row.Field <int>(2), LastUpdated = row.Field <DateTime>(3) }).ToList()); } return(null); }