设计模式-4-抽象工厂

 public abstract class AbsProduct
    {
        public abstract void Exc();
    }
 public abstract class AbsProductC
    {
        public abstract void Use(AbsProduct product);
    }
public abstract class AbsFactory
    {
        public abstract AbsProduct GetProduct();
        public abstract AbsProductC GetProductC();
    }
public class FactoryA : AbsFactory
    {
        public override AbsProduct GetProduct()
        {
            return new ProductA();
        }


        public override AbsProductC GetProductC()
        {
            return new ProductC();
        }
    }
          AbsFactory.AbsFactory absFactory = new FactoryA();
          absFactory.GetProduct().Exc();
          absFactory.GetProductC().Use(absFactory.GetProduct());