取消.net 5 支持，

.github/workflows/codeql.yml

@@ -43,6 +43,8 @@ jobs:
     steps:
     - name: Checkout repository
       uses: actions/checkout@v3
+      with:
+        submodules: 'true'
 
     # Initializes the CodeQL tools for scanning.
     - name: Initialize CodeQL

IoTSharp.Extensions.X509/IoTSharp.Extensions.X509.csproj

 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
     <RootNamespace>IoTSharp.Extensions.X509</RootNamespace>
-    <TargetFrameworks>net5.0;net6.0</TargetFrameworks>
+    <TargetFrameworks>net6.0</TargetFrameworks>
     <PackageId>IoTSharp.X509Extensions</PackageId>
     <Authors>Konrad Mattheis und Martin Berthold &amp;  MaiKeBing</Authors>
     <Copyright>Copyright (c) 2018-2020</Copyright>

IoTSharp.SDKs/IoTSharp.Sdk.CSharp/IoTSharp.Sdk.Http.csproj

 <Project Sdk="Microsoft.NET.Sdk">
 
   <PropertyGroup>
-    <TargetFrameworks>net48;net5.0;net6.0</TargetFrameworks>
+    <TargetFrameworks>net48;net6.0</TargetFrameworks>
     <RootNamespace>IoTSharp.Sdk.Http</RootNamespace>
     <Product>IoTSharp</Product>
     <Company>IoTSharp</Company>
@@ -25,8 +25,8 @@
     <Reference Include="System.Net.Http" />
     <Reference Include="System.ComponentModel.DataAnnotations" />
   </ItemGroup>
-  <ItemGroup Condition="'$(TargetFramework)' == 'net5.0'">
-    <PackageReference Include="System.ComponentModel.Annotations" Version="5.0.0" />
+  <ItemGroup Condition="'$(TargetFramework)' == 'net6.0'">
+    <PackageReference Include="System.ComponentModel.Annotations" Version="6.0.*" />
   </ItemGroup>
 
   <ItemGroup>