Replace object instance with another in C#

Question

In this question I would like to find out if and how this is possible. This technique would seem extremely bad practice but it seems that the API (UnityEditor) that I am using,

Answer 1

No, that's not possible.

To actually change all references to an object, you would have to freeze all threads in the process, and access their register sets and stack. That's what the garbage collector does, but it's not possible for regular code.

What the method most likely does is to make a deep copy of one object onto the other.