,NET timers

Comparisons: http://msdn.microsoft.com/en-us/magazine/cc164015.aspx

Note that System.Timers.Timer and System.Threading.Timer by default call your timer event handler on a worker thread obtained from the common language runtime (CLR) thread pool.

	System.Windows.Forms	System.Timers	System.Threading
Timer event runs on what thread?	UI thread	UI or worker thread	Worker thread
Instances are thread safe?	No	Yes	No
Familiar/intuitive object model?	Yes	Yes	No
Requires Windows Forms?	Yes	No	No
Metronome-quality beat?	No	Yes*	Yes*
Timer event supports state object?	No	No	Yes
Initial timer event can be scheduled?	No	No	Yes
Class supports inheritance?	Yes	Yes	No
* Depending on the availability of system resources (for example, worker threads)