Why is TaskScheduler.Current the default TaskScheduler?

by

I think the current behavior makes sense. If I create my own task scheduler, and start some task that starts other tasks, I probably want all the tasks to use the scheduler I created.

I agree that it’s odd that sometimes starting a task from the UI thread uses the default scheduler and sometimes not. But I don’t know how would I make this better if I was designing it.

Regarding your specific problems:

  • I think the easiest way to start a new task on a specified scheduler is new Task(lambda).Start(scheduler). This has the disadvantage that you have to specify type argument if the task returns something. TaskFactory.Create can infer the type for you.
  • You can use Dispatcher.Invoke() instead of using TaskScheduler.FromCurrentSynchronizationContext().

More Related Contents:

  1. Asynchronously wait for Task to complete with timeout
  2. Awaiting multiple Tasks with different results
  3. Running multiple async tasks and waiting for them all to complete
  4. Using async/await for multiple tasks
  5. StaTaskScheduler and STA thread message pumping
  6. TAP global exception handler
  7. What’s the difference between Task.Start/Wait and Async/Await?
  8. What is the best way to catch exception in Task?
  9. Regarding usage of Task.Start() , Task.Run() and Task.Factory.StartNew()
  10. When should TaskCompletionSource be used?
  11. No ConcurrentList in .Net 4.0?
  12. Task sequencing and re-entracy
  13. How to use non-thread-safe async/await APIs and patterns with ASP.NET Web API?
  14. Is there anything like asynchronous BlockingCollection?
  15. Cancelling a pending task synchronously on the UI thread
  16. Waiting for async/await inside a task
  17. ConfigureAwait pushes the continuation to a pool thread
  18. How can I prevent synchronous continuations on a Task?
  19. multiple awaits vs Task.WaitAll – equivalent?
  20. SynchronizationContext.Current is null in Continuation on the main UI thread
  21. How to achieve remove_if functionality in .NET ConcurrentDictionary
  22. Difference between returning and awaiting a Task in an async method [duplicate]
  23. Use Task.Run() in synchronous method to avoid deadlock waiting on async method?
  24. A pattern for self-cancelling and restarting task
  25. What is the correct way to cancel an async operation that doesn’t accept a CancellationToken?
  26. .Net TPL: Limited Concurrency Level Task scheduler with task priority?
  27. The lack of non-capturing Task.Yield forces me to use Task.Run, why follow that?
  28. Best way to limit the number of active Tasks running via the Parallel Task Library
  29. Task chaining (wait for the previous task to completed)
  30. Create a completed Task

Leave a Comment