Password - Tutorial C# Sharp

using System;
public class Exercise034
{
    public static void Main()
    {
        int user, pass;
        int counter = 0;

        do
        {
            Console.Write("Enter a user:  ");
            user = Convert.ToInt32(Console.ReadLine());

            Console.Write("Enter a password:  ");
            pass = Convert.ToInt32(Console.ReadLine());

            if ((user != 12) || (pass != 1234))
            {
                Console.WriteLine("Login Error");
                counter++;
            }

        }
        while (((user != 12) || (pass != 1234)) && (counter != 3));

        if ((user != 12) || (pass != 1234))
            Console.WriteLine("Logged out!");
        else
            Console.WriteLine("Login successful");
    }
}