C# Limit running code by time

Limiter.cs

class Limiter
{
    static readonly object _mtx = new object();

    readonly TimeSpan _limit;
    Action _action;
    bool _isWaiting;
    bool _requested;

    public Limiter(double limit) : this(TimeSpan.FromMilliseconds(limit))
    {
    }

    public Limiter(TimeSpan limit)
    {
        _limit = limit;
    }

    public void Do(Action action)
    {
        lock (_mtx)
        {
            _action = action;

            if (_isWaiting)
            {
                _requested = true;
                return;
            }

            Action();
        }
    }

    private async void Action()
    {
        _action();
        _isWaiting = true;

        await Task.Delay(_limit);
        if (!_requested)
        {
            _isWaiting = false;
            return;
        }

        _requested = false;
        Action();
    }
}

Program.cs

var limiter = new Limiter(1000);

while (true)
{
    limiter.Do(() =>
    {
        Console.WriteLine(DateTime.Now);
    });
}

// 05/07/2020 18:00:35
// 05/07/2020 18:00:36
// 05/07/2020 18:00:37
// 05/07/2020 18:00:38
// 05/07/2020 18:00:39
// 05/07/2020 18:00:40
// 05/07/2020 18:00:41
// 05/07/2020 18:00:42