Amazon.Glacier.Transfer.Internal.DownloadFileCommand.readNextMessage C# (CSharp) Method

        Message readNextMessage()
        {
            int retryAttempts = 0;
            var receiveRequest = new ReceiveMessageRequest() { QueueUrl = this.queueUrl, MaxNumberOfMessages = 1 };
            while (true)
            {
                try
                {
                    var receiveResponse = this.sqsClient.ReceiveMessage(receiveRequest);
                    retryAttempts = 0;

                    if (receiveResponse.Messages.Count == 0)
                    {
                        Thread.Sleep((int)(this.options.PollingInterval * 1000 * 60));
                        continue;
                    }

                    return receiveResponse.Messages[0];
                }
                catch (Exception)
                {
                    retryAttempts++;
                    if (retryAttempts <= MAX_OPERATION_RETRY)
                        Thread.Sleep(60 * 1000);
                    else
                        throw;
                }
            }
        }