Task.Run vs. ContinueWith in ASP.NET MVC

c# asp.net asp.net-mvc task-parallel-library async-await

This is probably something specific to your web app, so I can only speculate, but here's what I think:

It should work if you do this:

DoSomeBackgroundWork()    .ContinueWith(t => Debug.WriteLine("Background work finished"),         TaskContinuationOptions.ExecuteSynchronously);

This would be more close to the Task.Run version, where the continuation runs synchronously.

Right before you call DoSomeBackgroundWork directly from the controller method, add this:
```
Debug.WriteLine(new { TaskScheduler.Current });
```
If the output is anything but ThreadPoolTaskScheduler, I might be able to further explain this behavior (as I've just dealt with a somewhat related problem here).

BTW, using fire-and-forget in ASP.NET like this is really not a good idea, there's a lot of questions on SO discussing this.

CodeHunter