using System;

using System.Collections.Generic;

using System.Linq;

using System.Text;

namespace sealed_method

{

    class Program

    {

        public class BaseClass

        {

            public virtual void Display()

            {

                Console.WriteLine("Virtual method");

            }

        }

       public class DerivedClass : BaseClass

        {

            // Now the display method have been sealed and can;t be overridden

            public override sealed void Display()

            {

                Console.WriteLine("Sealed method");

            }

        }

        static void Main(string[] args)

        {

            DerivedClass ob1 = new DerivedClass();

            ob1.Display();

            Console.ReadLine();

        }

    }

}