Question

I dont know why but i can no longer interrupt my own thread.

thread = new Thread(new ParameterizedThreadStart(this.doWork));
thread.Start(param);
...
thread.Interrupt();
//in doWork()
try {
...
}
catch (System.Threading.ThreadInterruptedException)
{
//it never hits here. it use to
}

I search and i dont have any catch in my code and this is the only catch (System.Threading.ThreadInterruptedException). So what is going on? Using the debugger i can see my code run through the thread.Interrupt();. If i do thread.abort() i will catch a System.Threading.ThreadAbortException exception. Why is it catching that and not ThreadInterruptedException?

Answer 1

From BOL:

Interrupts a thread that is in the
WaitSleepJoin thread state.

If this thread is not currently
blocked in a wait, sleep, or join
state, it will be interrupted when it
next begins to block.

ThreadInterruptedException is thrown
in the interrupted thread, but not
until the thread blocks. If the thread
never blocks, the exception is never
thrown, and thus the thread might
complete without ever being
interrupted

BTW, you might be better off using the BackgroundWorker Class which supports cancelling.