It's Always best to use the lowest base type possible. This gives the implementer of your interface, or consumer of your method, the opportunity to use whatever they like behind the scenes. But far more importantly, if you are accepting an IList birli a parameter you'd better be careful, because https://cobjectkullanm41616.blogdal.com/28442327/açıklanan-c-ilist-nerelerde-kullanılıyor-hakkında-5-kolay-gerçekler