task-parallel-library Archives

When to dispose CancellationTokenSource?

The class CancellationTokenSource is disposable. A quick look in Reflector proves usage of KernelEvent, a (very likely) unmanaged resource. Since CancellationTokenSource has no … Read more

No ConcurrentList in .Net 4.0?

by IT Nursery

I was thrilled to see the new System.Collections.Concurrent namespace in .Net 4.0, quite nice! I’ve seen ConcurrentDictionary, ConcurrentQueue, ConcurrentStack, ConcurrentBag and BlockingCollection. One … Read more

What’s the difference between Task.Start/Wait and Async/Await?

by IT Nursery

I may be missing something but what is the difference between doing: public void MyMethod() { Task t = Task.Factory.StartNew(DoSomethingThatTakesTime); t.Wait(); UpdateLabelToSayItsComplete(); } … Read more

Create a completed Task

by IT Nursery

I want to create a completed Task (not Task<T>). Is there something built into .NET to do this? A related question: Create a … Read more

Nesting await in Parallel.ForEach [duplicate]

by IT Nursery

This question already has answers here: Parallel foreach with asynchronous lambda (11 answers) Closed 3 months ago. In a metro app, I need … Read more

Cancellation token in Task constructor: why?

by IT Nursery

Certain System.Threading.Tasks.Task constructors take a CancellationToken as a parameter: CancellationTokenSource source = new CancellationTokenSource(); Task t = new Task (/* method */, source.Token); … Read more