Abort current process from async task

Question

I have some complex functions that run in an async `Task` spawned via the TPL, which could occasionally fail in unexpected ways. When such a failure occurs, this indicates a programming error which could have resulted in corrupted program state. Therefore, I don't want my program to catch the exception, handle it and "limp on", I want my process to crash and terminate. I also want the thing to die in such a way that the Windows Error Reporting system detects it as a crash, and does all the useful debugging things like catching a minidump, sending it to Microsoft, etc. I realise this may run counter to your opinions of what programs should do in error conditions, but the question is not about that. The problem I have is, because the exception is raised from a task, it doesn't immediately cause the process to crash. It crashes some time later when the garbage collector, in its wisdom, decides to collect the "unobserved" exception. I want the process to crash immediately, because... - Th…

Accepted Answer

You could try this, or something similar:

```
public static Task FailFastOnException(this Task task) 
{ 
    task.ContinueWith(c => Environment.FailFast(“Task faulted”, c.Exception), 
        TaskContinuationOptions.OnlyOnFaulted | 
        TaskContinuationOptions.ExecuteSynchronously | 
        TaskContinuationOptions.DetachedFromParent); 
    return task; 
}
```

and then:

```
var t = Task.Factory.StartNew(…).FailFastOnException();
```

We've just used it a lot with "fire and forget" tasks that we want to take down the process if they for some reason fail.

Taken from a blog post written by Stephen Toub: http://blogs.msdn.com/b/pfxteam/archive/2009/05/31/9674669.aspx

Abort current process from async task

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