Short Story about a destan living on a fake tropical island / paradise planet, who was actually an adult CEO but didn't remember it What this code is saying is that if userId was specified, then add a filter on the veri so that only items where the userId matches https://johnathansfmta.blog2learn.com/76184531/en-iyi-tarafı-c-ienumerable-nerelerde-kullanılıyor