C# Login/Password System

using System;
public class Login1
{
public static void Main()
{
string username, password;
int ctr = 0;
       Console.Write("\n\nCheck username and password :\n");
       Console.Write("N.B. : Default username and password is : username and password\n");
       Console.Write("---------------------------------\n");
do
{
Console.Write("Input a username: ");
username = Console.ReadLine();

Console.Write("Input a password: ");
password = Console.ReadLine();

ctr++;
}
while (( username != "username" && password != "password" )
        && (ctr != 3));

        if (ctr == 3)
            Console.Write("\nLogin attempt more than three times. Try later!\n\n");
        else
            Console.Write("\nPassword entered successfull!\n\n");

    }
}