Refactor namespaces.

Source/MQTTnet/Client/Disconnecting/MqttClientDisconnectOptions.cs

@@ -0,0 +1,9 @@
+namespace MQTTnet.Client.Disconnecting
+{
+    public class MqttClientDisconnectOptions
+    {
+        public MqttClientDisconnectReason ReasonCode { get; set; } = MqttClientDisconnectReason.NormalDisconnection;
+
+        public string ReasonString { get; set; }
+    }
+}

Source/MQTTnet/Client/Disconnecting/MqttClientDisconnectReason.cs

@@ -0,0 +1,8 @@
+namespace MQTTnet.Client.Disconnecting
+{
+    public enum MqttClientDisconnectReason
+    {
+        NormalDisconnection = 0,
+
+    }
+}

Source/MQTTnet/Client/Disconnecting/MqttClientDisconnectedEventArgs.cs

@@ -0,0 +1,17 @@
+using System;
+
+namespace MQTTnet.Client.Disconnecting
+{
+    public class MqttClientDisconnectedEventArgs : EventArgs
+    {
+        public MqttClientDisconnectedEventArgs(bool clientWasConnected, Exception exception)
+        {
+            ClientWasConnected = clientWasConnected;
+            Exception = exception;
+        }
+
+        public bool ClientWasConnected { get; }
+
+        public Exception Exception { get; }
+    }
+}