protected override async Task ExecuteCoreAsync(CancellationToken stoppingToken) { var random = new Random(); while (!stoppingToken.IsCancellationRequested) { WriteLine($"{nameof(ConsumerService)}: Dequeue(before)"); var bytes = await _queue.DequeueAsync(stoppingToken); WriteLine($"{nameof(ConsumerService)}: Dequeue(after) {HexHelper.ToString(bytes)}"); // ランダムな時間待機する(何か処理する想定) var sec = random.Next(1, 3); WriteLine($"{nameof(ConsumerService)}: Wait {sec}s"); await Task.Delay(TimeSpan.FromSeconds(sec), stoppingToken); } }