Answer / archanarastogi

The abstract factory pattern provides an interface for
creating a family of objects whereas factory method
provides an interface for creating one object

Answer / nitin

Abstract factory pattern is used when you do not want the user to change the existing factories, instead allow him to plugin his factory class to create abstract object. Aim is to keep default framework from changing.

Factory method is used when you give the control of the entire framework to user, and he can add new methods to the factory (inorder to create new object type)

Answer / guest

Abstract Factory patterns acts a super-factory which creates
other factories. This pattern is also called as Factory of
factories. In Abstract Factory pattern an interface is
responsible for creating a set of related objects, or
dependent objects without specifying their concrete classes.

public interface AbstractFactory
{
AbstractProductA CreateProductA();

AbstractProductB CreateProductB();
}

public class ConcreteFactoryA : AbstractFactory
{
public AbstractProductA CreateProductA()
{
return new ProductA1();
}

public AbstractProductB CreateProductB()
{
return new ProductB1();
}
}

public class ConcreteFactoryB : AbstractFactory
{
public AbstractProductA CreateProductA()
{
return new ProductA2();
}

public AbstractProductB CreateProductB()
{
return new ProductB2();
}
}

public interface AbstractProductA { }

public class ProductA1 : AbstractProductA { }

public class ProductA2 : AbstractProductA { }

public interface AbstractProductB { }

public class ProductB1 : AbstractProductB { }

public class ProductB2 : AbstractProductB { }

public class Client
{
private AbstractProductA _productA;
private AbstractProductB _productB;

public Client(AbstractFactory factory)
{
_productA = factory.CreateProductA();
_productB = factory.CreateProductB();
}
}

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