Thank you but in the new version of c# script component the packages are installed in the script aditor the pack icon “install package” there is no manages assemblies option in the editor component.
The problemes is something related to the permission to the dll file…
@clavel_marine I investigated the PhysX.Net.dll library from its NuGet package. The dll seems to have native dependencies and it seems like that’s what causing an error loading the dll inside of Rhino. I had to use the native dlls from the runtimes\win-x64\native directory of the Nuget package. Even with those I get the error below. I suspect this might be a conflict between native dlls of Rhino and this package.