create a timer that counts down in csharp

main.cs
using System;
using System.Timers;

class CountdownTimer
{
    static Timer timer = new Timer();

    static void Main()
    {
        int countdownSeconds = 60;

        timer.Interval = 1000; // 1 second
        timer.Elapsed += OnElapsed;
        timer.Start();

        Console.WriteLine($"Countdown started for {countdownSeconds} seconds...");
        Console.ReadLine();
    }

    static void OnElapsed(object sender, ElapsedEventArgs e)
    {
        int countdownSeconds = 60;
        countdownSeconds--;
        
        Console.WriteLine($"Countdown: {countdownSeconds} seconds left...");

        if (countdownSeconds == 0)
        {
            timer.Stop();
            Console.WriteLine("Countdown complete!");
        }
    }
}
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