Is there a .NET collection interface that prevents adding objects?

Question

I have a class that maintains list of objects of another class. List of objects is a public property. I would like to prevent users from adding and removing objects directly

Answer 1

Out of the box, only IEnumerable will provide this without exposing any Add and Remove public methods that might trick the client into getting a runtime exception.

If you want your public API to explicitely state that the collection is read-only and you need an indexer, you will have to write your own wrapper around existing List or T[].