Why can .NET not have memory leaks?

Question

Ignoring unsafe code, .NET cannot have memory leaks. I\'ve read this endlessly from many experts and I believe it. However, I do not understand why this is so.

It is

Answer 1

What about if you are using a managed dll but the dll contians unsafe code? I know this is spliting hairs, but if you dont have the source code, then from yourr point of view, you are only using managed code but you can still leak.