sizeof() equivalent for reference types?

Question

I\'m looking for a way to get the size of an instance of a reference type. sizeof is only for value types. Is this possible?

Answer 1

If you don't mind it being a little less accurate than perfect, and for comparative purposes, you could serialize the object/s and measure that (in bytes for example)

EDIT (I kept thinking after posting): Because it's a little more complicated than sizeof for valuetypes, for example: reference types can have references to other objects and so on... there's not an exact and easy way to do it that I know of...