C# Program to perform all arithmetic operations.

This program is compiled and tested on a Visual Studio 2012.

using System;

namespace TechStudyCSharp
{
    class Program
    {
        static void Main(string[] args)
        {
            int num1;
            int num2;
            int sum, sub, mult, mod;
            float div;

            Console.WriteLine("Enter first number :");
            num1 = Convert.ToInt32( Console.ReadLine());
            Console.WriteLine("Enter second number :");
            num2 = Convert.ToInt32(Console.ReadLine());

            sum = num1 + num2;
            sub = num1 - num2;
            mult = num1 * num2;
            mod = num1 % num2;
            div = (float)num1 / num2;

            Console.WriteLine("\nSum of number1 and number2 : " + sum);
            Console.WriteLine("Difference of number1 and number2 : "+ sub);
            Console.WriteLine("Product of number1 and number2 : " + mult);
            Console.WriteLine("Modulus of number1 and number2 : " + mod);
            Console.WriteLine("Quotient of number1 and number2 : " + div);
            Console.ReadKey();
        }
    }
}

Result:

Enter first number :

16

Enter second number :

3

Sum of number1 and number2 : 19

Difference of number1 and number2 : 13

Product of number1 and number2 : 48

Modulus of number1 and number2 : 1

Quotient of number1 and number2 : 5.333333