Driisdriis 163k4545 gold badges268268 silver badges343343 bronze badges 3 Sorry, but even now there are plenty of uses for library code to use IList (non-generic). Anyone who says otherwise hasn't suffered enough reflection / data-binding / etc ;) Maybe take it into a List of T rather than ArrayList, so https://milooxcgk.wikinarration.com/6142451/5_basit_teknikleri_için_c_ilist_nedir