/// <summary>
        /// Retrieve the PurchaseOrderdetail information  from  PurchaseOrderDetail Table according to the purchaseOrderDetail Parameter
        /// Return PurchaseOrderDetail
        /// </summary>
        /// <param name="purchaseOrderDetail"></param>
        /// <returns></returns>
        public PurchaseOrderDetail GetPurchaseOrderDetail(entity.PurchaseOrderDetail purchaseOrderDetail)
        {

            purchaseorderdetail = inventory.PurchaseOrderDetails.Where(reqObj => reqObj.Id == purchaseorderdetail.Id).First();
            if (!purchaseorderdetail.Equals(null))
                return purchaseorderdetail;
            return null;
        }