Why does C# allow you to 'throw null'?

Question

While writing some particularly complex exception handling code, someone asked, don\'t you need to make sure that your exception object isn\'t null? And I said, of course n

Answer 1

Taken from here:

If you use this expression in your C# code it will throw a NullReferenceException. That is because the throw-statement needs an object of type Exception as its single parameter. But this very object is null in my example.