1.3.8.1.2

using System;

class Program
    {
    static void Main()
        {
        /*
         * Сделайте счётчик неверных вводов пароля,
         * и при достижение числа 5, завершите программу.
         */

        int attempts = 5;

        while(true)
            {
            string password = Console.ReadLine();
            if (password == "admin")
                {
                Console.WriteLine("Secret message");
                break;
                }
            else
                {
                attempts--;
                Console.WriteLine("Wrong passport, you have only {0} attempts left", attempts);
                if (attempts==0)
                    {
                    Console.Clear();
                    Console.WriteLine("\tYou have no more attempts\n\t\t Bye!");
                    break;
                    }
                }
            }
        }
    }