using System;

public class Program

{

    public static void Main()

    {

        Console.WriteLine("Ordinary person decorated with Humanitize decorator to save from selfish thinking and having thoughtful of human around.");

        Console.WriteLine("Ordinary person");

        Mankind ordinaryPerson=new OrdinaryPerson();

        ordinaryPerson.Think();

        Console.WriteLine("Humanitizing....");

        Console.WriteLine("Humanitized Person");

        Mankind human=new Humanitize(ordinaryPerson);

        human.Think();

    }

}

​

public abstract class Mankind

{

     public void Eat()

     {

     }

     public void Drink()

     {

     }

​

    public void Sleep() {

    }

    public abstract void Think();

}

​

public abstract class Humanity:Mankind

{

   protected Mankind mankind;

   public Humanity(Mankind mankind)

   {

    this.mankind=mankind;

   }

   public override void Think()

   {

    if(mankind!=null) 

    {

      mankind.Think();

    }

   }

}

​

​

public class OrdinaryPerson:Mankind

{

    public override void Think()

    { 

       Console.WriteLine("I'm just thinking about myself!");

    }

}

​

public class Humanitize:Humanity

{

​

   public Humanitize(Mankind mankind):base(mankind)

   {

   }

​

  public override void Think()

  {

    //base.Think();

    Console.WriteLine("Thinking all human around the world.");

  }

}

​

​

​