计时器的回调线程

Question

I was thinking about how timers work, and there's something I don't fully understand.
A Timer uses an event that is called when the time elapses. This I assume is triggered by an OS event that controls the clock (or is controlled by the clock).
But I'm not sure what thread will catch that event..

Does a Timer object have a thread of its own ?
Or will the event be called in the thread which created the timer object ?

EDIT:

And is there a difference in that aspect between System.Timers.Timer and System.Windows.Forms.Timer ?

Answer 1

It depends on the Timer . If you use System.Windows.Forms.Timer , the tick event will be handled in the UI thread. In System.Threading.Timer and System.Timers.Timer it defaults to a thread pool thread. However, in the latter case you can specify a SynchronizingObject which can be used to marshal the handler to an appropriate thread.