using System;

namespace TestSealedClasses 

{

    public class Base

    {

/*

        public sealed void Show()//This Line will give an error - "cannot

            {                      //be sealed because it is not an override"

​

                Console.WriteLine("This is Base Class.");

            }

        }

*/

​

    }

​

    public class Derived : Base

    {

        public void Show()

        {

            Console.WriteLine("This is Derived Class.");

        }

    }

    public class Program

    {

        public static void Main(string[] args)

        {

            Base objBaseReference = new Derived();

            //objBaseReference.Show();// Output ---------> This is Base Class.

        }

    }

}