Conditional Statements - EchangeTwoIntegers

using System;

    class EchangeTwoIntegers
    {
        static void Main(string[] args)
        {
            int a, b; //digits to be entered
            bool successParse;

            do
            {
                Console.Write("Enter digit: ");
                successParse = int.TryParse(Console.ReadLine(), out a);

            } while (!successParse);

            do
            {
                Console.Write("Enter digit: ");
                successParse = int.TryParse(Console.ReadLine(), out b);

            } while (!successParse);

            Console.WriteLine("You entered {0} AND {1} ", a,b);

            if (a>b)
            {
                a = a + b;
                b = a - b;
                a = a - b;
                Console.WriteLine("The values will be exchanged");
                Console.WriteLine("Exchanged values are {0} AND {1}", a, b);
            }

            else
            {
                Console.WriteLine("The value won't be exchanged");
            }
        }
    }