Write a program in C# for using Sealed keyword wih class

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

namespace prg8
{
    sealed class A
    {
        public void show()
        {
            Console.WriteLine("used sealed keyword prevent further extension of class");
            
        }
    }
    
    class Program
    {
        static void Main(string[] args)
        {
            A om = new A();
            om.show();
        }
    }
}




OUTPUT
used sealed keyword prevent further extension of class