[Shrezzing]

Dotnet uses Nuget[1]. Packages in the system are immutable, & never changing. They can be unlisted, but never deleted (except in limited & extreme cases, like malware), which means even if a package maintainer stops publishing new versions to the repository, existing packages will continue to be publicly available for as long as Microsoft continues to exist.

[1] https://www.nuget.org/

[mixmastamyk]

Often a package says it works with OS version X, and not X+1. It may be true or false. But what you described does not solve either version of that problem.

Or the "says it will work with > X," but doesn't.