This is kind of hard to explain, I hope my English is sufficient:
I have a class "A" which should maintain a list of objects of class "B" (like a private List). A consumer of class "A" should be able to add items to the list. After the items are added to the list, the consumer should not be able to modify them again, left alone that he should not be able to temper with the list itself (add or remove items). But he should be able to enumerate the items in the list and get their values. Is there a pattern for it? How would you do that?
If the question is not clear enough, please let me know.
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