Note That the IsReadOnly flag comes from ICollection, and indicates whether items gönül be added or removed from the collection; but just to really confuse things, it does not indicate whether they can be replaced, which in the case of Arrays (which return IsReadOnlys == true) güç be. C# CollectionBase https://c-object-kullan-m22803.educationalimpactblog.com/50351231/c-ilist-kullanımı-ile-ilgili-detaylı-notlar