using System;

namespace inheritance3

{

    class Animal

    {

        public virtual string Test1()

        {

            return "test11";

        }

    }

    class dog: Animal

    {

        public override string Test1()

        {

            return "test12";

        }

    }

    public class ExecRectangle

    {

        public static void Main(string[] args)

        {

            Animal a2 = new dog();

            Console.WriteLine(a2.Test1());          

            Animal a = new Animal();

            Console.WriteLine(a.Test1());

            dog d = new dog();

            Console.WriteLine(d.Test1());

        }

    }

}