using System;
namespace Calculateion
{
    class CalculateNumber
    {
        int Number1, Number2, ;
        char option;
        int Result;
        public void Number()
        {
            Console.WriteLine("Enter the First number");
            Number1 = Convert.ToInt32(Console.ReadLine());
            Console.WriteLine("Enter the second number");
            Number2 = 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 = Number1 + Number2;
                    Console.WriteLine("The result of addition is:{0}",Result);
                    break;
                case '2':
                    Result = Number1 - Number2;
                    Console.WriteLine("The result of subtraction is:{0}",Result);
                   break
                case '3':
                    Result = Number1 * Number2;
                    Console.WriteLine("The result of multiplication is:{0}",Result);
                    break;
                case '4':
                    Result = Number1 / Number2;
                    Console.WriteLine("The result of division is:{0}",Result);
                    break;
                default:
                    Console.WriteLine("Invalid Option");
                   break;
            }
            Console.ReadLine();
                    
        }
               
    }
    class ClassMain
    {
        static void Main(string[] args)
        {
            CalculateNumber obj = new CalculateNumber();
            obj.Number();
        }
    }
}