This post is a follow-up from this How to create nuget package with Stylecop Analyzer and custom ruleset?

I am currently working on a nuget package with custom analyzers, a stylecop.json, and a Custom.ruleset with referencing to stylecop analyzer. This package serves as a consistent style guideline in all our team projects.

I have created my solution based on the Visual studio template Analyzer with Code Fix (.NET Standard).

I removed the .CodeFixes, .Test and .VSIX project and moved the CodeFixes into the main Analyzer.csproj project. Those work fine.

Now I want to add a stylecop.json and a Custom.ruleset to my nuget package, which also checks for warnings and highlight them in the project where the nuget package will be installed.

I added the references in the .csproj files like so:

MyAnalyzer.csproj

<ItemGroup>
  <None Include="stylecop.json" CopyToOutputDirectory="PreserveNewest" Pack="true" PackagePath="content"/>
  <None Include="Custom.ruleset" CopyToOutputDirectory="PreserveNewest" Pack="true" PackagePath="content"/>
</ItemGroup>

MyAnalyzer.Package.csproj

<ItemGroup>
<ProjectReference Include="..MyAnalyzerMyAnalyzer.csproj" />
</ItemGroup>

<ItemGroup>
    <Content Include="..MyAnalyzerstylecop.json" Pack="true" PackagePath="contentFiles/any/any/stylecop.json" />
    <Content Include="..MyAnalyzerCustom.ruleset" Pack="true" PackagePath="contentFiles/any/any/Custom.ruleset" />
</ItemGroup>

<ItemGroup>
    <None Include="..MyAnalyzerstylecop.json" Pack="true" PackagePath="content/stylecop.json" />
    <None Include="..MyAnalyzerCustom.ruleset" Pack="true" PackagePath="content/Custom.ruleset" />
</ItemGroup>

Sadly this does not work.
To generate the .nupkg file I do:

MyAnalyzer> dotnet build -c Release

MyAnalyzer.Package> dotnet build -c Release
MyAnalyzer.Package> dotnet pack -c Release
MyAnalyzer.Package> copy binReleaseMyAnalyzer.1.0.1.nupkg C:LocalNuGetFeed

MyTestProject> dotnet add package MyAnalyzer --version 1.0.1 --source C:LocalNuGetFeed

If I look at the .nuspec file inside the generated .nupkg it looks like this:

<?xml version="1.0" encoding="utf-8"?>
<package xmlns="http://schemas.microsoft.com/packaging/2013/05/nuspec.xsd">
  <metadata>
    <id>MyAnalyzer</id>
    <version>1.0.2</version>
    ...
    <contentFiles>
      <files include="any/any/stylecop.json" buildAction="Content" />
      <files include="any/any/Custom.ruleset" buildAction="Content" />
    </contentFiles>
  </metadata>
</package>

The PackageReference in my testProject after adding the nuget package is this:

 <PackageReference Include="MyAnalyzer" Version="1.0.2">
   <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
   <PrivateAssets>all</PrivateAssets>
 </PackageReference>

I tried to research this specific case, but I had no luck. Does someone have any idea on what to try?