Add .net6 support

Author: FreePhoenix888

.github/workflows/CD.yml

@@ -19,7 +19,7 @@ jobs:
       with:
         submodules: true
     - name: Test
-      run: dotnet test -c Release -f net5
+      run: dotnet test -c Release -f net6
     - name: Generate PDF with CSharp code
       if: github.event_name == 'push'
       run: |

csharp/Platform.Converters.Benchmarks/Platform.Converters.Benchmarks.csproj

@@ -2,7 +2,7 @@
 
   <PropertyGroup>
     <OutputType>Exe</OutputType>
-    <TargetFramework>net5</TargetFramework>
+    <TargetFramework>net6</TargetFramework>
     <IsPackable>false</IsPackable>
     <LangVersion>latest</LangVersion>
     <Nullable>enable</Nullable>

csharp/Platform.Converters.Tests/Platform.Converters.Tests.csproj

@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
   <PropertyGroup>
-    <TargetFrameworks>net472;netcoreapp2.1;netcoreapp3.1;net5</TargetFrameworks>
+    <TargetFrameworks>net472;netcoreapp2.1;netcoreapp3.1;net5;net6</TargetFrameworks>
     <IsPackable>false</IsPackable>
     <LangVersion>latest</LangVersion>
     <Nullable>enable</Nullable>

csharp/Platform.Converters/Platform.Converters.csproj

@@ -6,7 +6,7 @@
     <AssemblyTitle>Platform.Converters</AssemblyTitle>
     <VersionPrefix>0.3.1</VersionPrefix>
     <Authors>Konstantin Diachenko</Authors>
-    <TargetFrameworks>net472;netstandard2.0;netstandard2.1;net5</TargetFrameworks>
+    <TargetFrameworks>net472;netstandard2.0;netstandard2.1;net5;net6</TargetFrameworks>
     <AssemblyName>Platform.Converters</AssemblyName>
     <PackageId>Platform.Converters</PackageId>
     <PackageTags>LinksPlatform;Converters;CachingConverterDecorator;CheckedConverter;ConverterBase;IConverter;UncheckedConverter;UncheckedSignExtendingConverter</PackageTags>