Document strong-name runtime error and recommend ILRepack solution for ACadSharp integration

[Copilot]

Problem

Runtime FileLoadException (HRESULT 0x80131044) when CADability (strong-name signed) loads ACadSharp v3.0.8 (unsigned) under .NET Framework. Runtime enforces strong-name requirements despite successful compilation.

Investigation

Attempted vendoring approach:

• Cloned ACadSharp v3.0.8 source to ThirdParty/ACadSharp/
• Configured strong-name signing with CADability's key
• Result: Build fails with 146 errors due to C# version conflicts (code requires 8.0/9.0/11.0/12.0 mix)

Key finding: Warning suppression (<NoWarn>CS8002</NoWarn>) only silences compile-time warnings—does not resolve runtime enforcement.

Recommended Solution: ILRepack

Merge unsigned ACadSharp.dll into signed CADability.dll post-build:

<ItemGroup>
  <PackageReference Include="ILRepack.Lib.MSBuild.Task" Version="2.0.18.3" />
</ItemGroup>

<Target Name="ILRepack" AfterTargets="Build">
  <ItemGroup>
    <InputAssemblies Include="$(OutputPath)CADability.dll" />
    <InputAssemblies Include="$(OutputPath)ACadSharp.dll" />
  </ItemGroup>
  <ILRepack
    OutputFile="$(OutputPath)CADability.dll"
    InputAssemblies="@(InputAssemblies)"
    KeyFile="$(MSBuildProjectDirectory)\CADabilityKey.snk"
    Internalize="true"
  />
</Target>

Benefits: Single signed assembly, no runtime dependency on unsigned DLLs, works with existing NuGet packages.

Alternative Approaches

Documented in STRONG_NAME_RUNTIME_ERROR.md:

• Skip verification (requires admin, not production-ready)
• Target .NET 6+ (modern runtimes ignore strong-name enforcement)
• Fork and sign ACadSharp (high maintenance)
• Request official signed package (long-term)

Status

Documentation complete. ILRepack implementation pending decision. Vendored source remains in tree but does not build.

Warning

Firewall rules blocked me from connecting to one or more addresses (expand for details)

I tried to connect to the following addresses, but was blocked by firewall rules:

• www.nuget.org
  • Triggering command: /usr/bin/wget wget -q REDACTED -O acadsharp.3.0.8.nupkg k/_temp/runtime-logs/user.env (dns block)

If you need me to access, download, or install something from one of these locations, you can either:

• Configure Actions setup steps to set up my environment, which run before the firewall is enabled
• Add the appropriate URLs or hosts to the custom allowlist in this repository's Copilot coding agent settings (admins only)

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