事件侦听器是否使用CPU时间

也许这是一个愚蠢的问题,但是事件监听器是像计时器一样使用CPU周期,还是在事件被触发之前它们是非活动的?

它是特定于语言的,还是所有语言处理这一点基本相同?

我想写一个小的服务,它只在网络断开事件被触发时做任何事情,我不想服务只在监听时耗尽资源(当然除了内存)。

我计划这样做

using NetworkUtilities;
    ManagementEventWatcher networkAdapterArrivalWatcher = new ManagementEventWatcher("\\root\\wmi","SELECT * FROM MSNdis_NotifyAdapterArrival ");
                    networkAdapterArrivalWatcher.Options.Timeout = new TimeSpan(0,0,5);

    ManagementEventWatcher networkAdapterRemovalWatcher = new ManagementEventWatcher("\\root\\wmi","SELECT * FROM MSNdis_NotifyAdapterRemoval " );
                    networkAdapterRemovalWatcher.Options.Timeout = new TimeSpan(0,0,5);

    ConnectionNotifierHandler handler = new ConnectionNotifierHandler();
                    networkAdapterArrivalWatcher.EventArrived += new EventArrivedEventHandler(handler.Arrived);
                    networkAdapterRemovalWatcher.EventArrived += new EventArrivedEventHandler(handler.Removed);

    //Start watching for events
    networkAdapterArrivalWatcher.Start();
    networkAdapterRemovalWatcher.Start();

    public void Arrived(object sender, EventArrivedEventArgs e)
    {
            using (ManagementBaseObject ev = e.NewEvent)
            {
                //Log the event
            }
    }

    public void Removed(object sender, EventArrivedEventArgs e)
    {
            using (ManagementBaseObject ev = e.NewEvent)
            {
                //Log the event
            }           
    }