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 ;) Found this thread while I was looking for a solution to the https://cobjectkullanm42850.blogkoo.com/c-ilist-nerelerde-kullanılıyor-için-5-İkinci-trick-47635009