using System;

public class Program

{

    public static void Main()

    {

        {    

    Console.Write("Enter first number: ");

    int a = Int32.Parse(Console.ReadLine());

    Console.Write("Enter second number: ");

    int b = Int32.Parse(Console.ReadLine());    

​

    if (a > b)

    {

        a = a + b;

        b = a - b;

        a = a - b;

    }

    Console.WriteLine("First number - {0}, Second number - {1}.", a, b);

} 

    }

}

​