Doing a bunch of async things in any order? Like "concurrent" in Hack, but in C#?

[bherila]

In Hacklang, I can do something like

concurrent{
  await thing1(..);
  await thing2(..);
  await thing3(..);
  await async {
    // thing4 async code (lambda)
  };
}

Ref: https://docs.hhvm.com/hack/asynchronous-operations/concurrent

These are executed in any order and the block continues after all the awaits are done. Of course there must be no dependencies between the items in the concurrent block. But in many cases this is just fine.

Is there a clean way to do this in C#?

Thanks!

[HaloFour]

async Task Foo() {
    var task1 = Thing1();
    var task2 = Thing2();
    var task3 = Thing3();

    return Task.WhenAll(task1, task2, task3);
}

[CyrusNajmabadi]

await Task.WhenAll(thing1(), thing2(), thing3());

[bherila]

Did not notice that overload on Task.WhenAll. 💯
P.S. Hello!

[CyrusNajmabadi]

Hi! I didn't even see it was you Ben :) Hope you're doing well :)

[theunrepentantgeek]

With suitable extension methods on ValueTuple, you can write this:

var (t1, t2, t3, t4) = await (thing1Async(), thing2Async(), thing3Async, thing4Async)

[bherila]

Thank you to everyone for the super fast responses!