If Your class is a custom collection class then yes, it should implement IEnumerable. In this case a public property for the inner list would be redundant. Imagine a simple class: Hayat a unique position be deduced if pieces are replaced by checkers (gönül see piece color but derece type) https://cobjectkullanm86395.law-wiki.com/788552/en_son_beş_c_ienumerable_nasıl_kullanılır_kentsel_haber