Simple throttle utility

ThrottleManager.cs

using System;
using System.Collections.Generic;

namespace Utilities
{
    public class ThrottleManager
    {
        static Dictionary<object, DateTime> disabledUntil = new Dictionary<object, DateTime>();

        public static bool Throttle(object key, int delay)
        {
            bool allowedToRun;
            var now = DateTime.Now;
            

            DateTime expiry;
            if (disabledUntil.TryGetValue(key, out expiry))
            {
                allowedToRun = now > expiry;
            }
            else
            {
                allowedToRun = true;
            }

            if (allowedToRun == true)
            {
                disabledUntil[key] = now.AddMilliseconds(delay);
            }

            return allowedToRun;
        }
    }
}

/*
// Use case in e.g. event handler:

        private void Button_Click(object sender, RoutedEventArgs e)
        {
            if (ThrottleManager.Throttle("SomeAction", 100))
                DoSomeAction();
        }
*/