En iyi Tarafı C# IEnumerator neden kullanmalıyız
This type parameter is covariant. That is, you yaşama use either the type you specified or any type that is more derived. For more information about covariance and contravariance, see Covariance and Contravariance in Generics. Derivedit güç be useful to use the iterators directly. A good example is when trying to "pair up" two different sequence