A project defines `[Cache(60)]` and applies it to a method, but no framework component re…

A project defines `[Cache(60)]` and applies it to a method, but no framework component reads `CacheAttribute`. What does the attribute do?

1. It stores metadata but does not cache calls by itself.
2. The CLR caches the return value for 60 seconds.
3. The compiler generates a dictionary around the method.
4. Reflection automatically intercepts each call.