public IEnumerable <CmnItemGrade> GetGrade(int?pageNumber, int?pageSize, int?IsPaging)
        {
            IEnumerable <CmnItemGrade> objListLot = null;

            try
            {
                objListLot = objStockService.GetGrade(pageNumber, pageSize, IsPaging);
            }
            catch (Exception e)
            {
                e.ToString();
            }
            return(objListLot.ToList());
        }