.NET - Multiple Timers instances mean Multiple Threads?

Question

I already have a windows service running with a System.Timers.Timer that do a specific work. But, I want some works to run at the same time, but in different threads.

I've been told to create a different System.Timers.Timer instance. Is this correct? Is this way works running in parallel?

for instance:

System.Timers.Timer tmr1 = new System.Timers.Timer();
tmr1.Elapsed += new ElapsedEventHandler(DoWork1);
tmr1.Interval = 5000;

System.Timers.Timer tmr2 = new System.Timers.Timer();
tmr2.Elapsed += new ElapsedEventHandler(DoWork2);
tmr2.Interval = 5000;

Will tmr1 and tmr2 run on different threads so that DoWork1 and DoWork2 can run at the same time, i.e., concurrently?

Thanks!

Answer 1

It is not incorrect.

Be careful. System.Timers.Timer will start a new thread for every Elapsed event. You'll get in trouble when your Elapsed event handler takes too long. Your handler will be called again on another thread, even though the previous call wasn't completed yet. This tends to produce hard to diagnose bugs. Something you can avoid by setting the AutoReset property to false. Also be sure to use try/catch in your event handler, exceptions are swallowed without diagnostic.