Using IDisposable to unsubscribe events

Question

I have a class that handles events from a WinForms control. Based on what the user is doing, I am deferencing one instance of the class and creating a new one to handle the

Answer 1

No, you're not preventing the intention of IDisposable. IDisposable is intended as an all-purpose way to ensure that when you're done using an object, you can proactively clean up everything tied to that object. It doesn't have to be only unmanaged resources, it can include managed resources too. And an event subscription is just another managed resource!

A similar scenario that frequently arises in practice is that you will implement IDisposable on your type, purely in order to ensure you can call Dispose() on another managed object. This is not a perversion either, it is just tidy resource management!