Parallel.ForEach: How to block the main thread until all the parallel task finished

Question

In the following scenario: can we block the main thread to begin to perform step 3 until step 2 finished?
I'm talking about C#

//step 1: some tasks
/*
*/

//step 2: perform some sub tasks in parallel.
Parallel.ForEach(X, x => Foo(x));

//step 3: Some other task
//Can we begin to perform step 3 until all sub tasks in step 2 finished???

`Parallel.ForEach` will wait. – Ofiris Oct 11 '14 at 07:01 — Ofiris, Oct 11 '14 at 07:01

score 1 · Answer 1 · answered Oct 11 '14 at 07:10

1

That should be the default behaviour. Put it in a console app with a console.writeline after it to prove it if you need to.

answered Oct 11 '14 at 07:10

kidshaw

3,423
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score 0 · Answer 2 · answered Oct 11 '14 at 07:10

0

If you are using Task class to create the "tasks" you mentioned, probably try Task.WaitAll(Task[])

answered Oct 11 '14 at 07:10

slepox

792
4
9

He isn't using the `Task` class, he's using the `Parallel` class. This doesn't provide an answer to the question. – Yuval Itzchakov Oct 11 '14 at 08:13

Parallel.ForEach: How to block the main thread until all the parallel task finished

2 Answers2