abstract class example program in c#

using System;

using System.Collections.Generic;

using System.Linq;

using System.Text;

namespace ConsoleApplication16

{

    public abstract class A

    {

        public abstract void show(); //abstract method with method declaraion

    }

    public class B:A

    {

        public override void show()  //method implementation with override keyword

        {

            Console.WriteLine("abstratct class and abstract method");

        }

    }

    class Program

    {

        static void Main(string[] args)

        {

            B b1 = new B();

            b1.show();

        }

    }

}

output screenshot: