API Browser redirecting to .net Framework 4.8.1 or earlier for a lot of APIs

[dodexahedron]

What the title says.

The API Browser, when told to go to .net 10 or 11, is redirecting to .net Framework 4.8.1 or earlier. This makes a lot of APIs unreachable.

May be happening for other frameworks as well. I did not test it beyond trying 3 different browsers and a handful of namespaces, all for .net 10 and 11.

Many namespaces seem to be affected.

Here are a few:

• System - Goes to .net Framework 4.8.1
• System.Buffers - Goes to netstandard 2.1
• System.Buffers.Binary - Goes to netstandard 2.1
• System.Collections.Generic - Goes to .net framework 4.8.1, making things like PriorityQueue unreachable via the tree (I built the link myself)

Many more were broken, too.
Tested in Firefox, Edge, and Chrome.

[dodexahedron]

Here's a quick demo...

Ms.Learn.Busticated.webm

[gewarren]

Thanks for logging the issue. This is a known issue and is being tracked internally via https://portal.microsofticm.com/imp/v5/incidents/details/795946206/summary (for those that have access). This only affects APIs that are available in both .NET Framework or .NET Standard AND modern .NET versions. This issue started after we moved the .NET Framework API reference source to a separate repo as part of issue #12513.