How to prevent an exception in a background thread from terminating an application?

Question

I can hookup to AppDomain.CurrentDomain.UnhandledException to log exceptions from background threads, but how do I prevent them terminating the runtime?

Answer 1

Here is a great blog post about this problem: Handling "Unhandled Exceptions" in .NET 2.0

IMO it would be right to handle exceptions in background threads manually and re-throw them via callback if necessary.

delegate void ExceptionCallback(Exception ex);

void MyExceptionCallback(Exception ex)
{
   throw ex; // Handle/re-throw if necessary
}

void BackgroundThreadProc(Object obj)
{
   try 
   { 
     throw new Exception(); 
   }
   catch (Exception ex)
   { 
     this.BeginInvoke(new ExceptionCallback(MyExceptionCallback), ex); 
   }
}

private void Test()
{
   ThreadPool.QueueUserWorkItem(new WaitCallback(BackgroundThreadProc));
}