NewHw15

using System;

class Program
{
    static void Main(string[] args)
    {
        string name = "surname";
        string surname = "name";

        Console.WriteLine($"{name}, {surname}");

        var previousName = name;
        name = surname;
        surname = previousName;

        Console.WriteLine($"{name}, {surname}");
        Console.ReadKey();
    }
}