Does awaiting for Task.Run always wait for response

Question

I'm trying to implement an await Task.Run in my controller and then return the response.

Just curious if the response will always be got before we attempt to return it.

            var response = await Task.Run(() => _myService.GetResponse(refno));
            return Ok(response);

Could it attempt to return a response which hasn't been set yet?

Thanks

Answer 1

Task.Run will immediately return an unfinished task. With the await you are waiting for the task to complete without blocking your thread. The task will only complete, when _myService.GetResponse(refno)) returns or throws a exception.

In short: Your response will always been set, when you hit your second line. But _myService.GetResponse(refno) could throw an exception. In this case the exception will be rethrown and you will not reach your second line.