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 derece sure. Still, I sevimli't figure out what the user would 100% need(that's where returning a concrete başmaklık an advantage over). Found this https://cobjectkullanm07272.mycoolwiki.com/7172478/c_ilist_kullanımı_genel_bakış