Konami Code in C#

Question

I am looking to have a C# application implement the Konami Code to display an Easter Egg. http://en.wikipedia.org/wiki/Konami_Code

What is the best way to do this?<

Answer 1

Here's a fairly simple and efficient solution:

public class KonamiSequence
{
    private static readonly Keys[] KonamiCode = { Keys.Up, Keys.Up, Keys.Down, Keys.Down, Keys.Left, Keys.Right, Keys.Left, Keys.Right, Keys.B, Keys.A };

    private readonly Queue _inputKeys = new Queue();

    public bool IsCompletedBy(Keys inputKey)
    {
        _inputKeys.Enqueue(inputKey);

        while (_inputKeys.Count > KonamiCode.Length)
            _inputKeys.Dequeue();

        return _inputKeys.SequenceEqual(KonamiCode);
    }
}

Example usage:

private readonly KonamiSequence _konamiSequence = new KonamiSequence();

private void KonamiForm_KeyDown(object sender, KeyEventArgs e)
{
    if (_konamiSequence.IsCompletedBy(e.KeyCode))
        MessageBox.Show("Konami!");
}