Xamarin should no longer be referred to and we should refer to or direct to Maui instead:
https://learn.microsoft.com/en-us/dotnet/maui/what-is-maui?view=net-maui-9.0

In the AspNetCore.Docs repo, for all non-Blazor content:

• Remove all references to "Xamarin" or update to ".NET Multi-platform App UI (.NET MAUI)" for first reference and ".NET MAUI" for following references in the same doc.
• If a topic centers on .NET MAUI and requires a complete rewrite rather than just an updated link or reference update, and/or requires a code sample update, AND we decide not to retire or archive it as the solution, then identify it here and then create a new tracking issue for that work.
  Currently there are around 14 files referencing "Xamarin", some of which are Blazor docs for which there is a separate tracking issue.

Notify David Britch when complete and add the following notes on anything that is requiring more extensive work:

• This MessagePack for C# topic needs to be updated to refer to .NET Maui instead of Xamarin, we have some docs that point to it when mentioning MessagePack:
  https://github.com/MessagePack-CSharp/MessagePack-CSharp/tree/v2.1.90#aot-code-generation-to-support-unityxamarin
• There are 4 .gitignore files that call out files to ignore for Xamarin Studio *.userprefs as a safegaurd. I left these in:
  # User-specific files (MonoDevelop/Xamarin Studio) *.userprefs

See also:
#34325 for the Blazor docs part of this effort.
#34326 for the AspNetDocs repo effort.

Associated WorkItem - 363625