Best practice to handle exception, that is thrown within catch block, in a thread. (.NET)

Question

What's your opinion in handling exceptions within a thread's execution? More specifically, what if the exception is thrown inside catch block of an try-catch clause? And what happen to the thread if the exception is unhandled?

Accepted Answer

What's your opinion in handling exceptions within a thread's execution?

You should handle exceptions whenever possible and whenever you expect exceptions. Clarification: I totally agree with John that you should not handle exceptions everywhere - only where you can do something about them. However, you should never let an exception go unhandled in a thread as this will cause serious problems. Have a root exception handler and let your thread die gracefully (after logging the problem etc...)

More specifically, what if the thread is thrown inside catch block of an try-catch clause?

Did you mean: What if the exception is thrown within the catch block? Well, then it goes unhandled by the current try-catch block. It's best not to put too much processing in a catch block to avoid this situation as much as possible.

And what happen to the thread if the the the thread is unhandled?

Did you mean: What happens to the thread if the exception is unhandled? It dies.

And as Ben mentioned:

An uncaught exception in a thread triggers an UnhandledException in the thread's AppDomain. You can watch for these by adding an event handler:

```
AppDomain.CurrentDomain.UnhandledException += CurrentDomain_UnhandledException;
```

Best practice to handle exception, that is thrown within catch block, in a thread. (.NET)

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