using System;

public class abc{

int a;

int b;

public void sum(){

Console.WriteLine("Enter your First Value \n");

int num1 = Convert.ToInt32(Console.ReadLine());

Console.WriteLine("Enter your Second Value");

int num2 = Convert.ToInt32(Console.ReadLine());

int Total = num1 + num2;

Console.WriteLine("Your total Vaue is  -" + Total);

}   

public void sub(){

Console.WriteLine("Enter your First Value \n");

int num1 = Convert.ToInt32(Console.ReadLine());

Console.WriteLine("Enter your Second Value");

int num2 = Convert.ToInt32(Console.ReadLine());

int Total = num1 - num2;

Console.WriteLine("Your total Vaue is  -" + Total);

}

public void multi(){

Console.WriteLine("Enter your First Value \n");

int num1 = Convert.ToInt32(Console.ReadLine());

Console.WriteLine("Enter your Second Value");

int num2 = Convert.ToInt32(Console.ReadLine());

int Total = num1 * num2;

Console.WriteLine("Your total Vaue is  -" + Total);

}

public void div(){

Console.WriteLine("Enter your First Value \n");

int num1 = Convert.ToInt32(Console.ReadLine());

Console.WriteLine("Enter your Second Value");

int num2 = Convert.ToInt32(Console.ReadLine());

int Total = num1 / num2;

Console.WriteLine("Your total Vaue is  -" + Total);

}

}

​

​

​

​

public class Program

{

    public static void Main()

    {

        abc obj = new abc();

        Console.WriteLine("Hello - Welcome to my Calcutor program with Different Method");

        Console.WriteLine("press any one of the following \n");

        Console.WriteLine("1 - Add");

        Console.WriteLine("2 - Subtract");

        Console.WriteLine("3 - Multiplication");

        Console.WriteLine("4 - Division \n");

        int insert = Convert.ToInt32(Console.ReadLine());

        switch(insert){

            case 1:

                obj.sum();

                break;

            case 2:

                obj.sub();

                break;

            case 3:

                obj.multi();

                break;

            case 4:

                obj.div();

                break;

        }

        }

    }

​