Ordered collection classes — which choices represent ordered collections in .NET?

Introduction / Context:
“Ordered” refers to a deterministic iteration order defined by the data structure. Stack and Queue impose specific orders (LIFO and FIFO respectively).

Concept / Approach:
Stack yields elements in reverse insertion order (LIFO). Queue yields elements in insertion order (FIFO). HashTable has no guaranteed order. BitArray is index-addressable but represents bits rather than general objects; the question context typically treats Stack and Queue as the canonical ordered structures among those listed.

Why Other Options Are Wrong:
Map is not a standard .NET type name; HashTable has no guaranteed iteration order; “All”/“None” do not fit the behavior of Stack and Queue.

Final Answer:
Stack and Queue