Receiver

using RabbitMQ.Client;
using RabbitMQ.Client.Events;
using System;
using System.Collections.Generic;
using System.Text;
using System.Web.Script.Serialization;

class Program
{
    public static void Main()
    {
        var factory = new ConnectionFactory()
        {
            HostName = "gopher.rmq.cloudamqp.com",
            UserName = "ugphijbk",
            Password = "JGX8ywVq53msw8k9JA21r7ejNnRri_DD",
            VirtualHost = "ugphijbk"
        };
        var JS = new JavaScriptSerializer();
        using (var connection = factory.CreateConnection())
        using(var channel = connection.CreateModel())
        {
            IDictionary<string, object> Args = new Dictionary<string, object>();
            Args.Add("x-dead-letter-routing-key", "consulang-routing-dead"); //declarar as rotas configuradas
            Args.Add("x-dead-letter-exchange", "consulang-exchange-dead"); //declarar as rotas configuradas

            channel.QueueDeclare(queue: "consulang", durable: true, exclusive: false, autoDelete: false, arguments: Args);

            Console.WriteLine(" [*] Waiting for messages.");

            var consumer = new EventingBasicConsumer(channel);
            consumer.Received += (model, ea) =>
            {
                var body = ea.Body;
                var Msg = new Package();

                Msg = JS.Deserialize<Package>(Encoding.UTF8.GetString(body));
                Console.WriteLine(" [{2}] Received {0} with ID: {1}", Msg.Message, Msg.Id, ea.RoutingKey);

                EventingBasicConsumer m = (EventingBasicConsumer)model;
                m.Model.BasicReject(ea.DeliveryTag, true); //volta a colocar a mensagem na queue original. Perigo, se o problema está no conteudo da msg, o serviço entra em loop
                m.Model.BasicReject(ea.DeliveryTag, false);//coloca a mensagem que deu erro na queue de dead letter
                m.Model.BasicAck(ea.DeliveryTag, false);//após integrar a mensagem corretamente, enviar sinal ao Rabbit de que a msg foi corretamente consumida. Funciona como uma transação

            };

            var res = channel.BasicConsume(queue: "consulang", autoAck: false, consumer: consumer);//auto Acknowledgement a falso, vamos controlar o sucesso ou erro das mensagens

            Console.WriteLine(" Press [enter] to exit.");
            Console.ReadLine();
        }
    }
}
public class Package
{
    public string Id { get; set; }
    public string Message { get; set; }
    public bool Status { get; set; }
    public string CreatedAt { get; set; }
}