/*
 * C# Program to Perform all Basic Arithmetic Operations
 */
using System;
using System.Collections.Generic;
using System.Text;
namespace Program
{
class Program
{
    static void Main(string[] args)
    {
        int Num1, Num2, result;
        char option;
        Console.Write("Enter the First Number : ");
        Num1 = Convert.ToInt32(Console.ReadLine());
        Console.Write("Enter the Second Number : ");
        Num2 = 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.Write("Enter the Operation you want to perform : ");
        option = Convert.ToChar(Console.ReadLine());
        switch (option)
            {
            case '1':
                result = Num1 + Num2;
                Console.WriteLine("The result of Addition is : {0}", result);
                break;
            case '2':
                result = Num1 - Num2;
                Console.WriteLine("The result of Subtraction is : {0}", result);
                break;
            case '3':
                result = Num1 * Num2;
                Console.WriteLine("The result of Multiplication is : {0}", result);
                break;
            case '4':
                result = Num1 / Num2;
                Console.WriteLine("The result of Division is : {0}", result);
                break;
            default:
                Console.WriteLine("Invalid Option");
                break;
            }
        Console.ReadLine();
    }

}
}

/*
Enter the First Number : 100
Enter the Second Number : 2
Main Menu
1.  Addition
2.  Subtraction
3.  Multiplication
4.  Division
Enter the Operation you want to perform : 3
The Result of Multiplication is : 200