Webapi2 - Return from controller action after one task completes, but continue with further Async processing

Question

I have a question about Webapi2

My application is fully async/await, but I want to optimize the last part. I have a hard time finding out, so is there a

Answer 1

The code after the return statement will not be executed in your second example, but these tasks can be offloaded to the ThreadPool:

public async Task Foo(Bar bar)
{
    List tasks = new List();
    var actualresult = Barfoo(bar.Bar);
    foreach(var foobar in bar.Foo)
    {
        //some stuff which fills tasks for extra logic, not important for the client
        Task.Run(() => /* foobar task creation, queued on worker threads */);
    }
    // this will execute without waiting for the foobar logic to finish
    return Ok(actualresult.Result);
}

If you want to later check the 'extra logic' tasks for completion or errors, you may want to look into the Task Parallel Library