Finalizer Cleanup Scope
Question
Can a finalizer execute exactly the same logic as
Dispose?
Short interview answer
No. A finalizer should release only unmanaged resources directly owned by the type. It must not depend on other managed objects because their finalization order is not guaranteed.
Detailed answer
The dispose pattern separates cleanup performed by Dispose from finalizer cleanup. Dispose can clean managed and unmanaged resources because the caller controls timing. A finalizer is a GC fallback and should avoid managed dependencies; otherwise it can run after those dependencies have already been finalized. For example, a type that directly owns a native buffer may free that buffer from its finalizer, but it must not flush a managed Stream, notify a managed service, or call back into arbitrary application code there.