The abstractions library for API versioning.
$ dotnet add package Asp.Versioning.AbstractionsASP.NET API versioning gives you a powerful, but easy-to-use method for adding API versioning semantics to your new and existing REST services built with ASP.NET. The API versioning extensions define simple metadata attributes and conventions that you use to describe which API versions are implemented by your services.
This package contains the primary abstractions library for API versioning that can be used to create server and client-based applications.
https://github.com/dotnet/aspnet-api-versioning/releases/tag/v6.0.0