Do handle exceptions in threads. Unhandled exceptions in threads, even background threads, generally terminate the process. There are three exceptions to this rule:

• A ThreadAbortException is thrown in a thread because Abort was called.

• An AppDomainUnloadedException is thrown in a thread because the application domain is being unloaded.

• The common language runtime or a host process terminates the thread.

For more information, see Exceptions in Managed Threads.