Problem 10 - Exchange Variable Values

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

namespace ExchangeVariableValues
{
    class ExchangeVariableValues
    {
        static void Main()
        {
            int a = 5;
            int b = 10;

            a = a + b;
            b = a - b;
            a = a - b;

            Console.WriteLine("Values before: a = 5 \n              b = 10");
            Console.WriteLine("Values after:  a = {0}\n              b = {1}", a, b);
        }
    }
}
// Console Output:
// Values before: a = 5
//                b = 10
// Values after:  a = 10
//                b = 5