using System;

public class Program

{

    public class A {

​

        public virtual void meth1()

        {

            Console.WriteLine("A");

        }

​

    }

​

    public class B : A

    {

        public override void meth1()

        {

            Console.WriteLine("B");

        }

​

    }

​

    public class C: A

    {

        public new void meth1()

        {

            Console.WriteLine("C");

        }

​

    }

    public static void Main()

    {

            A a = new A();

            a.meth1();  //A

​

            A b = new B();

            b.meth1(); //B

​

            A c = new C();

            c.meth1(); //A

​

    }

}