public void ConsumeMessage()
        {
            try
            {
                var factory = new ConnectionFactory()
                {
                    HostName = "129.114.104.76", UserName = "******", Password = "******"
                };
                using (var connection = factory.CreateConnection())
                    using (var channel = connection.CreateModel())
                    {
                        channel.ExchangeDeclare(exchange: "amq.direct", type: "direct", durable: true);
                        //	channel.QueueDeclare(queue: "square", durable: false, exclusive: false, autoDelete: false);

                        Console.WriteLine(" [*] Waiting for messages.");
                        Publisher        objPub = new Publisher();
                        SquareController objSq  = new SquareController();

                        var consumer = new EventingBasicConsumer(channel);

                        consumer.Received += (model, ea) =>
                        {
                            var    body       = ea.Body;
                            var    message    = Encoding.UTF8.GetString(body);
                            var    routingKey = ea.RoutingKey;
                            string result     = objSq.GetSquareArea(message);
                            objPub.PublishResponse(result);
                            Console.WriteLine(" [x] Received '{0}':'{1}'", routingKey, message);
                        };
                        channel.BasicConsume(queue: "square", autoAck: true, consumer: consumer);
                        Console.ReadLine();
                    }
            }
            catch (Exception ex)
            {
                Console.Write(ex.Message);
            }
        }