【设计模式】7.桥接模式

public class BLL
    {
        private IDAL dataobj;
        public void add() { dataobj.addData();}
        public void update() { dataobj.updateData(); }
        public virtual void delete() { dataobj.deleteData(); }
    }

    public class NewsBLL : BLL
    {
        public override void delete() { 
            //实现方法
        }
    }
    public interface IDAL { 
        void addData();
        void updateData();
        void deleteData(); 
    }

    public class DAL : IDAL
    {
        public void addData() { }
        public void updateData() { }
        public void deleteData() { }
    }

    public class test
    {
        public void start() {
            BLL bll = new NewsBLL();
            bll.delete();
        }
    }