Question

Let’s assume I have following console application:

Thread thread = new Thread(new ThreadStart(() => { throw new Exception(); }));
thread.IsBackground = true;
thread.Start();

while (true)
  Console.WriteLine("Hello from main thread");

Is it possible to make entire application not crashing because of background tread’s exception (without using try..catch of course)?

Answer 1

Attach your unhandled exceptions handler:
http://msdn.microsoft.com/en-us/library/system.appdomain.unhandledexception.aspx

The better way you can achieve desired result (Ok, with try/catch, but only once) with global handler:

    public static void GlobalHandler(ThreadStart threadStartTarget)
    {
        try
        {
            threadStartTarget.Invoke();
        }
        catch (Exception ex)
        {
             //handle exception here
        }
    }

And then start your threads:

        Thread thread = new Thread(o => GlobalHandler(ThreadMethod));
        thread.Start();

P.S. However, really, I don’t like idea of catching all exceptions. It is almost never good idea.