Further warning fixes.

Author: networkfusion

nanoFramework.Aws.IoTCore.Devices/MqttConnectionClient.cs

@@ -19,10 +19,10 @@ namespace nanoFramework.Aws.IoTCore.Devices
     /// </summary>
     /// <remarks>
     /// Further documentation:
-    /// <a href="https://github.com/aws/aws-sdk-net/blob/master/sdk/src/Services/IotData/Generated/_netstandard/AmazonIotDataClient.cs"/>
-    /// <a href="https://github.com/aws/aws-iot-device-sdk-embedded-C/tree/master/src"/>
-    /// <a href="https://docs.aws.amazon.com/iot/latest/developerguide/device-shadow-mqtt.html"/>
-    /// <remarks>
+    /// <see href="https://github.com/aws/aws-sdk-net/blob/master/sdk/src/Services/IotData/Generated/_netstandard/AmazonIotDataClient.cs"/>
+    /// <see href="https://github.com/aws/aws-iot-device-sdk-embedded-C/tree/master/src"/>
+    /// <see href="https://docs.aws.amazon.com/iot/latest/developerguide/device-shadow-mqtt.html"/>
+    /// </remarks>
     public class MqttConnectionClient : IDisposable
     {
         /// <summary>
@@ -86,6 +86,8 @@ public enum QoSLevel
         /// </summary>
         public event CloudToDeviceMessage CloudToDeviceMessage;
 
+        internal MqttConnectionClient() { } //Required by IDisposable.
+
 
         /// <summary>
         /// Creates an <see cref="MqttConnectionClient"/> class.