Boxing vs Unboxing

Question

Another recent C# interview question I had was if I knew what Boxing and Unboxing is. I explained that value types are on Stack and reference types on Heap. When a value is cast

Answer 1

b is still 1 because b is a reference that still points to the object on the heap with a value of 1. a is 2 because you assigned it to a new object on the heap with a value of 2.

t2.x is 3 because t and t2 are two different references to the same object on the heap.