public Models.PurchaseOrder.PurchaseOrder AddPurchaseOrder(Models.PurchaseOrder.PurchaseOrder purchaseOrder)
        {
            var poResult = _context.PurchaseOrders.Add(purchaseOrder);

            _context.SaveChanges();
            return(poResult);
        }
        public Models.PurchaseOrder.PurchaseOrder UpdatePurchaseOrder(int purchaseOrderId, Models.PurchaseOrder.PurchaseOrder purchaseOrder)
        {
            var purchaseOrderResult = Get(purchaseOrderId);

            _context.Entry(purchaseOrderResult).CurrentValues.SetValues(purchaseOrder);
            _context.SaveChanges();
            return(Get(purchaseOrderId));
        }