What would be a good list of questions regarding C# and its features ? Have in mind that interviews I have coming up are always oriented around the Unity engine so they won't go too deep into the .NET ecosystem.

Possible questios so far:

1. Difference between value and reference types
2. Explain Garbace Gollection
3. What do you know about the Heap and the Stack
4. Whad do you know about Arrays, Lists, Hash Sets and Dictionaries