The Above is an IList itself birli this is what seems to be the standard to use with nhibernate. Otherwise I might have returned IEnumberable back but not sure. Still, I can't figure out what the user would 100% need(that's where returning a concrete saf an advantage over). Found this https://c-object-kullan-m97417.mybjjblog.com/temel-İlkeleri-c-ilist-nasıl-kullanılır-41571618