namespace ConsoleApplication3
{
    class Program
    {
        static void Main(string[] args)
        {
            int number = 10;
            string username = "bit1@abv.bg";
            string password = "secret";
            string newUsername = "bit2@abv.bg";
            string newPassword = "secret1";


            // cin
            Console.WriteLine("Ënter username: ");
            username = Console.ReadLine();
            Console.WriteLine("Ënter password: ");
            password = Console.ReadLine();

            if(username==newUsername && password==newPassword)
            {
                Console.WriteLine("Welcome!");
            }
            else
            {
                Console.WriteLine("Error");
            }



            //system.pause()
            Console.ReadKey();

        }
    }
}