log duplication fix

MQTTSample/MqttMultiTopicClientApp/Program.cs

@@ -17,6 +17,8 @@ namespace MqttMultiTopicClientApp
 
             await _mqttClient.AddTopicAsync("home/livingroom/temperature", MqttQoSLevel.AtLeastOnce);
 
+            await Task.Delay(1000);
+
             await _mqttClient.ConnectAsync(SERVER_IP, PORT, $"cid_{Random.Shared.Next(1, 1000)}");
             
             await _mqttClient.AddTopicAsync("home/bedroom/humidity", MqttQoSLevel.AtMostOnce);

MQTTSample/PMqttClient/MqttMultiTopicClient.cs

@@ -53,8 +53,6 @@ namespace PMqttClient
             _topics.Add(topic, qos);
             if (_mqttClient.IsConnected)
                 await SubscribeAsync(topic, qos);
-
-            WriteLog($"topic '{topic}' is added.");
         }
 
         public async Task RemoveTopicAsync(string topic)
@@ -107,11 +105,7 @@ namespace PMqttClient
             WriteLog("Connected to MQTT Broker.");
 
             foreach (var topic in _topics)
-            {
                 await SubscribeAsync(topic.Key, topic.Value);
-
-                WriteLog($"Subscribed to topic: {topic.Key} with QoS {topic.Value.ToString()}.");
-            }
         }
 
         private void WriteLog(string message)