Note That the IsReadOnly flag comes from ICollection, and indicates whether items hayat be added or removed from the collection; but just to really confuse things, it does not indicate whether they yaşama be replaced, which in the case of Arrays (which return IsReadOnlys == true) kişi be. Found this https://fernandogsbiq.blogozz.com/27668131/c-ilist-nedir-için-adım-haritaya-göre-yeni-adım