接口

            IAnimal p = new Manager();
            p.ShowMsg();//输出Manager

            p = new Person();//输出Person
            p.ShowMsg();
         
            Console.Read();
        }

        interface IAnimal
        {
            void ShowMsg();

        }

        class Person:IAnimal
        {
            public virtual void ShowMsg()
            {
                Console.WriteLine("Person");
            }
        }

        class Manager:Person
        {
            public override void ShowMsg()
            {
                Console.WriteLine("Manager");
            }
        }
           
           
       

    IAnimal p = new Manager();
            p.ShowMsg();//输出Person

            p = new Person();//输出Person
            p.ShowMsg();
         
            Console.Read();
        }

        interface IAnimal
        {
            void ShowMsg();

        }

        class Person:IAnimal
        {
            public virtual  void ShowMsg()
            {
                Console.WriteLine("Person");
            }
        }

        class Manager:Person
        {
            public new void ShowMsg()
            {
                Console.WriteLine("Manager");
            }
        }