Find the inner-most exception without using a while loop?

When C# throws an exception, it can have an inner exception. What I want to do is get the inner-most exception, or in other words, the leaf exception that doesn't have an inner exception. I can do this in a while loop:

while (e.InnerException != null)
{
    e = e.InnerException;
}

But I was wondering if there was some one-liner I could use to do this instead.

Oneliner :)

while (e.InnerException != null) e = e.InnerException;

Obviously, you can't make it any simpler.

As said in this answer by Glenn McElhoe, it's the only reliable way.

I believe Exception.GetBaseException() does the same thing as these solutions.

Caveat: From various comments we've figured out it doesn't always literally do the same thing, and in some cases the recursive/iterating solution will get you further. It is usually the innermost exception, which is disappointingly inconsistent, thanks to certain types of Exceptions that override the default. However if you catch specific types of exceptions and make reasonably sure they're not oddballs (like AggregateException) then I would expect it gets the legitimate innermost/earliest exception.