Console game where you guess the frequency of the beep.

FrequencyGuesser.cs

Console.WriteLine("Guess the frequency");

var random = new Random();
var playing = true;
var MIN = 37;
var MAX = 5000;
var threshold = MAX / 20;

var test = 37;
while (test <= MAX)
{
    Console.WriteLine($"This is {test}hz.");
    Console.Beep(test, 1000);
    Thread.Sleep(500);

    if (test == MIN)
    {
        test = 500;
        continue;
    }
    test += 500;
}

while (playing)
{
    Console.WriteLine("Enter a number between 1 and 5000.");
    Console.WriteLine("Press Enter to hear it again or q to quit.");
    Console.Write("Guess: ");
    Thread.Sleep(1000);
    var freq = random.Next(MIN, MAX);
    var lives = 3;
    while (lives > 0)
    {
        Console.Beep(freq, 1000);
        var guess = Console.ReadLine() ?? "";

        if (guess == "")
        {
            Console.Write("Playing again, what is it?: ");
            continue; // play it again sam.
        }

        if (guess.Trim().Equals("q", StringComparison.InvariantCultureIgnoreCase))
        {
            playing = false;
            break;
        }

        if (int.TryParse(guess, out int value))
        {
            if (value > freq - threshold && value < freq + threshold)
            {
                Console.WriteLine($"Yes!  The frequency was {freq}.");
                break;
            }
            else if (value < freq - threshold) Console.WriteLine("Too low!");
            else if (value > freq + threshold) Console.WriteLine("Too high!");
        }

        Console.WriteLine($"Nope. {lives} lives remaining.");
        lives--;

        if (lives == 0)
        {
            Console.WriteLine("DEAD");
            Console.WriteLine($"Frequency was {freq}");
            break;
        }
    }
}