Boxing/Unboxing and Nullable?

Question

I understand that boxing and unboxing is about casting (real type to object... object to real type). But I do not understand what the MSDN say about it with the Nullable. He

Answer 1

What it's saying is that if you do:

int? x = 5;
object y = x; // Boxing

You end up with a boxed int, not a boxed Nullable. Similarly if you do:

int? x = null; // Same as new Nullable() - HasValue = false;
object y = x; // Boxing

Then y ends up as a null reference.