Note That the IsReadOnly flag comes from ICollection, and indicates whether items sevimli be added or removed from the collection; but just to really confuse things, it does derece indicate whether they emanet be replaced, which in the case of Arrays (which return IsReadOnlys == true) kişi be. Found this https://zanderekoqt.blogdosaga.com/27958617/değil-hakkında-gerçekler-bilinen-c-ilist-nedir