C# Exercise: 52 Password 5 attempts

using System;  // Import the System namespace to use basic classes like Console

class Program  // Define the main class of the program
{
    static void Main()  // The entry point of the program
    {
        string username;  // Declare a variable to store the username
        string password;  // Declare a variable to store the password
        int attempts = 0;  // Variable to count the number of incorrect attempts

        // Allow a maximum of 5 attempts
        while (attempts < 5)
        {
            // Ask the user for their username
            Console.Write("Enter your username: ");
            username = Console.ReadLine();  // Read the username input from the user

            // Ask the user for their password
            Console.Write("Enter your password: ");
            password = Console.ReadLine();  // Read the password input from the user

            // Check if the username and password are correct
            if (username == "username" && password == "password")  // If both are correct
            {
                Console.WriteLine("Welcome! You have successfully logged in.");  // Display a welcome message
                return;  // Exit the program successfully
            }
            else  // If the username or password is incorrect
            {
                attempts++;  // Increment the number of attempts
                Console.WriteLine("Invalid username or password. Attempts left: " + (5 - attempts));  // Display error message and remaining attempts
            }
        }

        // If the user reaches 5 incorrect attempts, display a rejection message
        Console.WriteLine("You have been rejected after 5 incorrect attempts.");
    }
}