public Boolean addItemToOrder(InventoryItem inventoryItem, int count)
        {
            if (count <= inventoryItem.getProductCount())
            {
                OrderItem orderItem = new OrderItem();
                orderItem.setProductId(inventoryItem.getInventoryId());
                orderItem.setCount(count);
                orderItem.setSalePrice(inventoryItem.getSalePrice());

                orderItems.Add(orderItem);

                inventoryItem.orderItem(count);
                inventoryItems.Add(inventoryItem);
                return true;
            }
            else
            {
                return false;
            }
        }