using System;

    public class Program

    {

        public static void Main(string[] args)

        {

            var dog = new Dog();

            var animal = dog as Animal;

​

            animal.SayMyKind();

            animal.SayMyName();

            dog.SayMyName();

        }

    }

    class Animal

    {   

        public Animal()

        {

            this.SayMyKind();

            this.SayMyName();

        }

​

        public virtual void  SayMyKind()

        {

            Console.WriteLine("I am an animal");

        }

​

        public void SayMyName()

        {

            Console.WriteLine("Bob");

        }

    }

​

    class Dog: Animal

    {

        public Dog()

        {

            this.SayMyKind();

            this.SayMyName();

        }

​

        public override void SayMyKind()

        {

            Console.WriteLine("I am a dog");

        }

​

        public  new void SayMyName()

        {

            Console.WriteLine("Astor");

        }

    }