public void FetchTopics(string filter, out string[] topics)
{
_responses.Clear();
_mqttClient.ConnectAndWait(_channelConnectionOptions);
while (_mqttClient.IsConnected == false)
{
Thread.Sleep(100);
}
_mqttClient.Subscribe(filter, QosLevel.AtLeastOnce);
Thread.Sleep(2000);
_mqttClient.Unsubscribe(filter);
_mqttClient.DisconnectAndWait();
topics = new string[_responses.Count];
var i = 0;
foreach (var response in _responses)
{
topics[i] = response.Key + ":" + response.Value;
i++;
}
while (_mqttClient.IsConnected)
{
Thread.Sleep(100);
}
}