Factory Method Pattern

Because IoC containers use these patterns internally, consuming code does not need to implement them manually. The Factory Method pattern lets subclasses decide which class to instantiate rather than having the parent class make that decision directly. The Factory Method pattern provides an interface for creating objects, allowing subclasses or configurations to determine which concrete type gets instantiated. In Factory Method, a parent class defines an interface for creation and delegates the actual instantiation decision to its subclasses. IoC containers commonly use the Factory pattern internally. Factory and Singleton patterns operate behind the scenes in IoC containers. Factory Method is appropriate when the exact type of object to create may vary depending on context or configuration. The Factory Method pattern is useful when the correct type of object to create depends on runtime context.