Refactoring

Frameworks/MQTTnet.NetStandard/Client/MqttPacketDispatcher.cs

@@ -83,7 +83,7 @@ namespace MQTTnet.Client
             {
                 _packetByResponseType[responseType] = tcs;
             }
-
+            
             return tcs;
         }
 

Frameworks/MQTTnet.NetStandard/Internal/TaskExtensions.cs

@@ -30,7 +30,7 @@ namespace MQTTnet.Internal
 
                     if (task.IsFaulted)
                     {
-                        throw new MqttCommunicationException(task.Exception.GetBaseException());
+                        throw new MqttCommunicationException(task.Exception?.GetBaseException());
                     }
                 }
                 finally

Frameworks/MQTTnet.NetStandard/Server/IMqttServerOptions.cs

@@ -1,5 +1,4 @@
 using System;
-using System.Net;
 
 namespace MQTTnet.Server
 {