Make the CreatePizza method in SimplePizzaStoreBase protected and obviously don't expose it to customers.

[moslemkh]

I think the access modifier of the CreatePizza method in SimplePizzaStoreBase should be changed to protected because only the concrete classes of SimplePizzaStoreBase should be aware of it. In other words, we shouldn't expose CreatePizza to customers who come to the pizza store to order pizza. Therefore, it should be changed to:

protected abstract IPizza CreatePizza(PizzaTypeEnum pizzaType);

And obviously, in their concrete classes:

protected override IPizza CreatePizza(PizzaTypeEnum pizzaType)
=> _factory.CreatePizza(pizzaType);