If the hypothetical is: 1) you don't own the type, 2) it holds onto unmanaged resources, 3) the author didn't bother implementing IDisposable. Furthermore, 4) t

If the hypothetical is: 1) you don't own the type, 2) it holds onto unmanaged resources, 3) the author didn't bother implementing IDisposable. Furthermore, 4) the unmanaged resources are publicly exposed. This seems like an extreme edge case but ok. As soon as you are done implementing it, please contact the author and ask them to implement IDisposable like every other class that holds onto unmanaged resources.