Amazon.SQS.AmazonSQSClient.ReceiveMessageAsync C# (CSharp) Метод

        public void ReceiveMessageAsync(string queueUrl,  AmazonServiceCallback<ReceiveMessageRequest, ReceiveMessageResponse> callback, AsyncOptions options = null)
        {
            var request = new ReceiveMessageRequest();
            request.QueueUrl = queueUrl;
            ReceiveMessageAsync(request, callback, options);
        }

        public async Task<Amazon.SQS.Model.Message> GetMessage(string queueName, int  timeoutInMilliseconds, int numberOfCacheableMessages)
        {
            Amazon.SQS.Model.Message message = null;
            if (_queue.ContainsKey(queueName) && _queue[queueName].TryDequeue(out message)) return message;
            
            var request = new ReceiveMessageRequest(queueName)
            {
                MaxNumberOfMessages = numberOfCacheableMessages,
                WaitTimeSeconds = (int)TimeSpan.FromMilliseconds(timeoutInMilliseconds).TotalSeconds
            };

            using (var client = new AmazonSQSClient(_credentials))
            {
                var response = await client.ReceiveMessageAsync(request);
                                
                if (response.HttpStatusCode != HttpStatusCode.OK) return message;

                if (response.ContentLength == 0) return message;

                if (!response.Messages.Any()) return message;

                AddToQueue(queueName, response.Messages);

                if(_queue.ContainsKey(queueName))
                    _queue[queueName].TryDequeue(out message);
            }

            return message;
        }