Latest Dotnet version, and Plugin entry point

[Slashscreen]

Hello all, I have 3 questions regarding plugin development:
1) What is the latest version of .NET Framework I can use? I want to use System.Net.Http, which I believe was introduced in 4.8.
2) How do I get a list of the albums in the library, and what data structure do they use?
3) What is the entry point of the plugin? Is it Initialize? I'm attempting to add a menu item as per the tutorial on the wiki, but it isn't showing up, and I don't think my environment is set up properly to capture Console.WriteLine()s.
4) Is there complete documentation somewhere? I haven't been able to find it.

[Steven]

1 - 4.8
2 - use Library_QueryFilesEx(null, ...) and then for each url returned call Library_GetFileTag(url, MetadataType.Album). The api functions only use simple data types
3 - have a look at sample plugin shell that has the entry points