Property None

This is a source-breaking change. Existing C# call sites that match the pre-mutation signature will fail to compile because no overload with the original parameter list remains on the type. Choose this action only when you intentionally want to force callers to update their code (for example, in an internal codebase where every caller can be migrated in lockstep, or as the final step of a multi-release deprecation rolled out via ForwardAndMarkObsolete(string?, bool)).