asp .net mvc程序发布到IIS
consumer.Received 去监听处理的时候，使用的BasicAck 手动确认，发现处理了消息，但是手动确认并未成功，该消息还在队列中

using (IConnection connection = factory.CreateConnection())
{
using (var _recvChannel = connection.CreateModel())
{
_recvChannel.QueueDeclare(queue, true, false, false, null);

                        var consumer = new EventingBasicConsumer(_recvChannel);
                        consumer.Received += (sender, ea) =>
                        {
                            var body = Encoding.UTF8.GetString(ea.Body.ToArray());
                            var Head = ea.BasicProperties.Headers;
                            if (true)
                            {
                                _recvChannel.BasicAck(deliveryTag: ea.DeliveryTag, multiple: false); //这里未生效
                            }
                            else
                            {
                                _recvChannel.BasicNack(deliveryTag: ea.DeliveryTag, multiple: false, requeue: true);
                            }
                        };
                        _recvChannel.BasicConsume(queue: queue, autoAck: false, consumer: consumer);
                        Console.ReadLine();
                }
            }