public void EventHandlerNewEventArgsˑPerformanceTest()
        {
            var provider = new MyEventProvider1EventHandler <MyEventArgs> ();
            var listener = new MyEventListener1EventHandler <MyEventArgs>();

            listener.Listen(provider);
            provider.Raise4PerformanceTest();
            Assert.That(listener.Count, Is.EqualTo(listener.Count), "listener.Count");
        }