using System;

public class Program

{

    public static void Main()

    {

        Target t = new IntegraterAdapter();

        t.Integrator();

        Target t1 = new Target();

        t1.Integrator();

    }

}

​

public class Target

{

    public virtual void Integrator()

    {

        Console.WriteLine("Called target");

    }

}

​

public class IntegraterAdapter: Target

{

    private IntegrateMe intg = new IntegrateMe();

    public override void Integrator()

    {

        Console.WriteLine(intg.Calculate());

    }

}

​

public class IntegrateMe

{

    public string Calculate()

    {

        return "IntegrateMe called";

    }

}