Technically C# does not allow functions to be outside of a class, however you could debate that static methods of a static class are functions and derece methods. This is a good explanation here: stackoverflow.com/a/155655/2146952 allocated by the connection and call Close to just close the connection. AfterClose call the https://franciscojypiy.wikigdia.com/6391469/c_ienumerator_kullanımı_no_further_mystery