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

namespace ConsoleApplication1
{
    class Program
    {
        static void Main(string[] args)
        {
            int N1, N2;
            char option;
            int Result;

            Console.WriteLine("Enter the First Number:");
            N1 = Convert.ToInt32(Console.ReadLine());

            Console.WriteLine("Enter the Second Number:");
            N2 = Convert.ToInt32(Console.ReadLine());

            Console.WriteLine("****************************Main Menu**************************");
            Console.WriteLine("1. Addition");
            Console.WriteLine("2. Subtraction");
            Console.WriteLine("3. Multiplication");
            Console.WriteLine("4. Division");

            Console.WriteLine("Enter the Operation you want to perform");
            option = Convert.ToChar(Console.ReadLine());

            switch (option)
            {
                case '1':
                    Result = N1 + N2;
                    Console.WriteLine("The result of Addition is:{0}", Result);
                    break;
                case '2':
                    Result = N1 - N2;
                    Console.WriteLine("The result of Subtraction is:{0}", Result);
                    break;
                case '3':
                    Result = N1 * N2;
                    Console.WriteLine("The result of Multiplication is:{0}", Result);
                    break;
                case '4':
                    Result = N1 / N2;
                    Console.WriteLine("The result of Division is:{0}", Result);
                    break;
                default:
                    Console.WriteLine("Invalid Option");
                    break;

            } Console.ReadLine();
        }
    }
}