public class Father

        {

            public virtual void Show()

            {

                Console.WriteLine(" I am your father ");

            }

        }

        public class Child:Father

        {

            public override void Show()

            {

                base.Show();

                Console.WriteLine("I am your child");

            }

        }

       public class Father

        {

           public string Name { get; set; }

           public Father(string Name)

            {

                this.Name = Name;

            }

        }

        public class Child:Father

        {

            public Child():base("小明")

            {

                Console.WriteLine("输出基类的Name:{0}",Name);

            }

        }

        static void Main(string[] args)

        {

            Child child = new Child();

            Console.ReadKey();

        }