LINQ - Does the Where expression return new instance or reference to object instance

Question

This is probably a basic question for some, but it affects how I design a piece of my program.

I have a single collection of type A:

IEnumerable         


        

Answer 1

Making a new object that is a reference type is non-trivial. LINQ would have no idea how to do it. LINQ always returns the same instances when dealing with reference types.