Stopping work from one thread using another thread

Question

Not sure if my title is worded well, but whatever :)

I have two threads: the main thread with the work that needs to be done, and a worker thread that contains a form wi

Answer 1

I have a couple of quick comments:

1. Avoid using Thread.Abort() here's why.
2. Make your thread a background thread: Thread.IsBackground = true (this will automatically exit the thread when your app exits).

Here is a detailed discussion on how to safely stop a thread from running: Is it safe to use a boolean flag to stop a thread from running in C#

To stop the work on the main thread you'd have to do something like this:

boolean volatile isRunning = true;

static void Main(...)
{
    // ...
    // Working
    for (i = 0; i <= 10000; i++)
    {
        semaphore.WaitOne();
        if (!isRunning) break; // exit if not running
        if (pBar.Running)
            bgworker_ProgressChanged(i);
        semaphore.Release();
    }
    //...
    t1.Interrupt();// make the worker thread catch the exception
}
// 
void cancelButton_Click(object sender, EventArgs e)
{
    isRunning = false; // optimistic stop
    semaphore.Release();
}