Size of an object at runtime

Question

How do you get the size(in bytes) of an object or data structure at runtime, I know there profiler tools that do this I am only interested in doing this at runtime.

Data Structure is List<object>

I am trying to find out how much space the entire collection is taking and how much space an individual object is taking, not that there should, in theory, be a difference between the two.

Answer 1

I think the sizeof operator only works for value and unmanaged types; Marshal.SizeOf might give you what you need.