C# Program to swap two numbers without using temporary variable

using System;

namespace AbundantcodeApp
{
    class Program
    {
        static void Main(string[] args)
        {
            Console.WriteLine("Abundantcode.com coding sample");
            int number1, number2;
            Console.WriteLine("Enter the First Number : ");
            number1 = int.Parse(Console.ReadLine());
            Console.WriteLine("Enter the Second Number : ");
            number2 = int.Parse(Console.ReadLine());
            number1 = number1 - number2;
            number2 = number1 + number2;
            number1 = number2 - number1;
            Console.WriteLine("First Number is " + number1);
            Console.WriteLine("Second Number is " + number2);
            Console.Read();
        }
    }
}

using System;

​

namespace AbundantcodeApp

{

    class Program

    {

        static void Main(string[] args)

        {

            Console.WriteLine("Abundantcode.com coding sample");

            int number1, number2;

            Console.WriteLine("Enter the First Number : ");

            number1 = int.Parse(Console.ReadLine());

            Console.WriteLine("Enter the Second Number : ");

            number2 = int.Parse(Console.ReadLine());

            number1 = number1 - number2;

            number2 = number1 + number2;

            number1 = number2 - number1;

            Console.WriteLine("First Number is " + number1);

            Console.WriteLine("Second Number is " + number2);

            Console.Read();

        }

    }

}