Should Environment.HasShutdownStarted return true in unhandled exception events?

[MichalPetryka]

In .NET the property seems to always return false, but the docs say it should be true when the common language runtime (CLR) is shutting down.

That makes me wonder if it should return true inside AppDomain.UnhandledException event when IsTerminating is true and for similar unhandled/fatal events.

cc @jkotas for opinion.

[jkotas]

This property is documented to return true to indicate that shutdown finalization of all objects has started (https://learn.microsoft.com/dotnet/api/system.environment.hasshutdownstarted).

Shutdown finalization of all objects had fundamental reliability issues and was removed from .NET Core (#16028). Therefore, it makes sense for this property to always return false.