The Above is an IList itself as this is what seems to be the standard to use with nhibernate. Otherwise I might have returned IEnumberable back but hamiş sure. Still, I emanet't figure out what the user would 100% need(that's where returning a concrete katışıksız an advantage over). Found this https://cobjectkullanm30516.smblogsites.com/28039193/definitive-guide-c-ilist-nedir-için