We're in the process of updating the xunit.analyzers package to support VS2019 16.11, as well as adding explicit support for VS2022 17.4, 17.6, and 17.8. This should resolve C# 12-related issues like https://github.com/xunit/xunit/issues/2789
The downside? Running the test suite now takes 5 longer than it used to, since it has to run against Roslyn 3.11, 4.2, 4.4, 4.6, and 4.8. Testing parallelization options to minimize wait times, but it's sloooooow right now. 😭
