Gost and MQTT in C#

gistfile1.txt

using System;
using System.Text;
using uPLibrary.Networking.M2Mqtt;
using uPLibrary.Networking.M2Mqtt.Messages;

namespace MqttClient_Net
{
    class Program
    {
        static void Main()
        {
            var server = "gost.geodan.nl";
            var topic = "Datastreams(1)/Observations";
            var message = "{\"phenomenonTime\": \"2016 - 05 - 09T11: 04:15.790Z\", \"result\": 20 }";

            Console.WriteLine("Gost - MQTT Client");
            var client = new MqttClient(server);
            client.MqttMsgPublishReceived += client_MqttMsgPublishReceived;
            var clientId = Guid.NewGuid().ToString();
            client.Connect(clientId);
            Console.WriteLine("Listening....");
            // subscribe
            client.Subscribe(new[] { topic },new[] { MqttMsgBase.QOS_LEVEL_EXACTLY_ONCE });
            // and publish something...
            client.Publish("GOST/"+topic, Encoding.Default.GetBytes(message));
        }

        private static void client_MqttMsgPublishReceived(object sender, MqttMsgPublishEventArgs e)
        {
            var str = Encoding.Default.GetString(e.Message);
            Console.WriteLine("result: " + str);
        }
    }
}