Apologies if this has been asked before - searching SO for the terms "object reference" primarily returns page after page of questions about NullReferenceException.
What is the size of an object reference in .Net? Does it vary between x86, x64, and/or AnyCPU compilation?
If it makes a difference, I'm personally interested in C#.
The reference itself is basically a pointer. 32 bits on a 32 bit OS, 64 bits on a 64 bit OS.
The size of the object that's referenced is more complicated.
An object reference is basically a pointer to the memory that contains the object's attributes. As such the reference is one processor word in length - 32 bits on 32 bit platforms and 64 bits on x64.