Update nuget packages.

Build/MQTTnet.nuspec

@@ -57,7 +57,7 @@
         <dependency id="System.Net.WebSockets.Client" version="4.3.2" />
       </group>
       <group targetFramework="uap10.0">
-        <dependency id="Microsoft.NETCore.UniversalWindowsPlatform" version="6.1.9" />
+        <dependency id="Microsoft.NETCore.UniversalWindowsPlatform" version="6.2.8" />
       </group>
       <group targetFramework="net452">
       </group>

MQTTnet.sln

@@ -1,7 +1,7 @@
 
 Microsoft Visual Studio Solution File, Format Version 12.00
-# Visual Studio 15
-VisualStudioVersion = 15.0.27004.2010
+# Visual Studio Version 16
+VisualStudioVersion = 16.0.28729.10
 MinimumVisualStudioVersion = 10.0.40219.1
 Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "MQTTnet.Tests", "Tests\MQTTnet.Core.Tests\MQTTnet.Tests.csproj", "{A7FF0C91-25DE-4BA6-B39E-F54E8DADF1CC}"
 EndProject

Source/MQTTnet.AspnetCore/MqttWebSocketServerAdapter.cs

@@ -44,9 +44,9 @@ namespace MQTTnet.AspNetCore
             clientCertificate?.Dispose();
 
             var channel = new MqttWebSocketChannel(webSocket, endpoint, isSecureConnection);
-            var clientAdapter = new MqttChannelAdapter(channel, new MqttPacketFormatterAdapter(), _logger.CreateChildLogger(nameof(MqttWebSocketServerAdapter)));
+            var channelAdapter = new MqttChannelAdapter(channel, new MqttPacketFormatterAdapter(), _logger.CreateChildLogger(nameof(MqttWebSocketServerAdapter)));
 
-            var eventArgs = new MqttServerAdapterClientAcceptedEventArgs(clientAdapter);
+            var eventArgs = new MqttServerAdapterClientAcceptedEventArgs(channelAdapter);
             ClientAcceptedHandler?.Invoke(eventArgs);
 
             if (eventArgs.SessionTask != null)

Source/MQTTnet/Formatter/MqttPacketFormatterAdapter.cs

@@ -20,19 +20,22 @@ namespace MQTTnet.Formatter
             UseProtocolVersion(protocolVersion);
         }
 
-        public MqttProtocolVersion ProtocolVersion { get; private set; }
+        public MqttProtocolVersion ProtocolVersion { get; private set; } = MqttProtocolVersion.Unknown;
 
         public IMqttDataConverter DataConverter
         {
             get
             {
                 ThrowIfFormatterNotSet();
+
                 return _formatter.DataConverter;
             }
         }
 
         public ArraySegment<byte> Encode(MqttBasePacket packet)
         {
+            if (packet == null) throw new ArgumentNullException(nameof(packet));
+
             ThrowIfFormatterNotSet();
 
             return _formatter.Encode(packet);
@@ -40,6 +43,8 @@ namespace MQTTnet.Formatter
 
         public MqttBasePacket Decode(ReceivedMqttPacket receivedMqttPacket)
         {
+            if (receivedMqttPacket == null) throw new ArgumentNullException(nameof(receivedMqttPacket));
+
             ThrowIfFormatterNotSet();
 
             return _formatter.Decode(receivedMqttPacket);

Source/MQTTnet/MQTTnet.csproj

@@ -54,7 +54,7 @@
   </ItemGroup>
 
   <ItemGroup Condition="'$(TargetFramework)'=='uap10.0'">
-    <PackageReference Include="Microsoft.NETCore.UniversalWindowsPlatform" Version="6.1.9" />
+    <PackageReference Include="Microsoft.NETCore.UniversalWindowsPlatform" Version="6.2.8" />
   </ItemGroup>
 
   <ItemGroup Condition="'$(TargetFramework)'=='net452'">
@@ -62,9 +62,5 @@
 
   <ItemGroup Condition="'$(TargetFramework)'=='net461'">
   </ItemGroup>
-
-  <ItemGroup>
-    <PackageReference Include="Microsoft.NETCore.UniversalWindowsPlatform" Version="6.2.2" />
-  </ItemGroup>
-
+  
 </Project>

Tests/MQTTnet.AspNetCore.Tests/MQTTnet.AspNetCore.Tests.csproj

@@ -7,7 +7,7 @@
   </PropertyGroup>
 
   <ItemGroup>
-    <PackageReference Include="Microsoft.NET.Test.Sdk" Version="15.9.0" />
+    <PackageReference Include="Microsoft.NET.Test.Sdk" Version="16.0.1" />
     <PackageReference Include="MSTest.TestAdapter" Version="1.4.0" />
     <PackageReference Include="MSTest.TestFramework" Version="1.4.0" />
   </ItemGroup>

Tests/MQTTnet.Benchmarks/MQTTnet.Benchmarks.csproj

@@ -9,7 +9,7 @@
   </PropertyGroup>
 
   <ItemGroup>
-    <PackageReference Include="BenchmarkDotNet" Version="0.11.3" />
+    <PackageReference Include="BenchmarkDotNet" Version="0.11.5" />
     <PackageReference Include="System.IO.Pipelines" Version="4.5.2" />
     <PackageReference Include="Microsoft.AspNetCore" Version="2.1.6" />
   </ItemGroup>

Tests/MQTTnet.Core.Tests/MQTTnet.Tests.csproj

@@ -9,7 +9,7 @@
   <ItemGroup>
     <PackageReference Include="MSTest.TestAdapter" Version="1.4.0" />
     <PackageReference Include="MSTest.TestFramework" Version="1.4.0" />
-    <PackageReference Include="Microsoft.NET.Test.Sdk" Version="15.9.0" />
+    <PackageReference Include="Microsoft.NET.Test.Sdk" Version="16.0.1" />
   </ItemGroup>
 
   <ItemGroup>

Tests/MQTTnet.TestApp.UniversalWindows/MQTTnet.TestApp.UniversalWindows.csproj

@@ -12,7 +12,7 @@
     <DefaultLanguage>en-US</DefaultLanguage>
     <TargetPlatformIdentifier>UAP</TargetPlatformIdentifier>
     <TargetPlatformVersion Condition=" '$(TargetPlatformVersion)' == '' ">10.0.17134.0</TargetPlatformVersion>
-    <TargetPlatformMinVersion>10.0.16299.0</TargetPlatformMinVersion>
+    <TargetPlatformMinVersion>10.0.10240.0</TargetPlatformMinVersion>
     <MinimumVisualStudioVersion>14</MinimumVisualStudioVersion>
     <FileAlignment>512</FileAlignment>
     <ProjectTypeGuids>{A5A43C5B-DE2A-4C0C-9213-0A381AF9435A};{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}</ProjectTypeGuids>
@@ -142,10 +142,10 @@
   </ItemGroup>
   <ItemGroup>
     <PackageReference Include="Microsoft.NETCore.UniversalWindowsPlatform">
-      <Version>6.2.2</Version>
+      <Version>6.2.8</Version>
     </PackageReference>
     <PackageReference Include="Microsoft.Toolkit.Uwp.UI.Controls">
-      <Version>5.0.0</Version>
+      <Version>4.0.0</Version>
     </PackageReference>
   </ItemGroup>
   <PropertyGroup Condition=" '$(VisualStudioVersion)' == '' or '$(VisualStudioVersion)' &lt; '14.0' ">