Factory Method

实例化具有相同基类的一组对象，允许创建子类Creator来决定实例哪个对象Product。

参与：

1)Product:interface

2)Concrete Product: derived Product class

3)Creator:Abstract class

4)Concrete Creator: derived Creator class

 

Interface IProduct {string GetName()};

public class Prouct A : IProduct

{

  public string GetName() {return "this is Product A";}

}

 

 

abstract class Creator

{

  public abstract IProduct GetObject();

  }

 

public class CreatorA : Creator

{

   public override IProduct GetObject()

   {

      return new ProductA();

    }
}