using System;

public class Program

{

    public static void Main()

    {

​

        Calculate(new Addition());

        Calculate(new Substraction());

        Calculate(new Multiplication());

        Calculate(new Division());

    }

    public static void Calculate(ICalculate calculate)

    {

        Console.WriteLine(calculate.Calc(3, 3));

    }

}

​

public class Addition : ICalculate

    {

        public int Calc(int a, int b)

        {

            Console.WriteLine("Here is the result of Addition:");

            return a + b;

        }

    }

public class Substraction : ICalculate

    {

        public int Calc(int a, int b)

        {

            Console.WriteLine("Here is the result of Substraction:");

            return a - b;

        }

    }

public class Multiplication : ICalculate 

    {

        public int Calc(int a, int b)

        {

            Console.WriteLine("Here is the result of Multiplication:");

            return a * b;

        }

    }

public class Division : ICalculate 

    {

        public int Calc(int a, int b)

        {

            Console.WriteLine("Here is the result of Division:");

            return a / b;

        }

    }

​

​

public interface ICalculate

    {

        int Calc(int a, int b);

    }