Running multiple async tasks and waiting for them all to complete

Question

I need to run multiple async tasks in a console application, and wait for them all to complete before further processing.

There\'s many articles out there, but I see

Answer 1

The best option I've seen is the following extension method:

public static Task ForEachAsync(this IEnumerable sequence, Func action) {
    return Task.WhenAll(sequence.Select(action));
}

Call it like this:

await sequence.ForEachAsync(item => item.SomethingAsync(blah));

Or with an async lambda:

await sequence.ForEachAsync(async item => {
    var more = await GetMoreAsync(item);
    await more.FrobbleAsync();
});