5. Перестановка местами значений

using System;

namespace HomeWork
{
    internal class Program
    {
        public static void Main(string[] args)
        {
            string userName = "12345678";
            string password = "ProGamer";

            Console.WriteLine($"До перестановки: NickName = {userName}, Password = {password}");

            string temp = userName;
            userName = password;
            password = temp;
            Console.WriteLine($"После перестановки: NickName = {userName}, Password = {password}");
        }
    }
}