C# is there anyway to instruct a code block to finish processing before the app gets shut down?

I know this won't work in all scenarios, but please keep in mind the following 3 scenarios:

1. An IIS reset - if the code is running inside IIS
2. A Server restart or shut down
3. User closes the app (if its a Windows form or Console App).

Lets say I have a code block that runs a loop. Is there a way to ensure at least that the current loop item gets processed before the app shuts down.

Like this...

Loop runs: 100 items, app gets shutdown (for reasons above), app is busy with item in loop 53 for example. It first finishes all code for that item between the foreach... and then allows the app to gracefully shutdown.

Is this type of thing possi开发者_如何学编程ble?

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Nothing I would do but If it is ok to abuse the system you might be able to use the CriticalFinalizerObject

It is guaranteed to execute

even in situations where the CLR forcibly unloads an application domain or aborts a thread

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I really don't think so. You are stuck in front of windows. Windows take that kind of decisions for you.. IF somebody is shutting down the pc, then you are just shut down. This is the same scenario as if they where a power failure. What will you do in that case?

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For a normal application: While your code is running in a foreground thread (not ThreadPool or Thread.IsBackground == true) it will not be aborted mid-execution, unless the user forcibly quits the process.

If you are running your loop in a background thread, you can try handling the exit event of the application, waiting for the loop to finish or at least reach a stable state before being aborted.

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In most apps you can handle close event and not allow it but you can't do anything when user decides to kill your process. So i would say that its not possible.

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How about doing this. using a try catch and finally in the static void Main Here even if you end task the application, finally will run. not sure about power failure.

    static void Main()
    {
        Application.EnableVisualStyles();
        Application.SetCompatibleTextRenderingDefault(false);
        try
        {
            Application.Run(new Form1());
        }
        finally
        {
            MessageBox.Show("I run always.");
        }

    }

Hope it helps