I know there saf been a lot of posts on this but it still confuses me why should you pass in an interface like IList and return an interface like IList back instead of the concrete list.
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Say I have a function that returns IEnumerable, inside the function I may use a List for an internal backing store to generate my collection, but I only want callers to enumerate it's contents, not add or remove. Accepting an interface as a parameter communicates a similar message "I need a collection of strings, don't worry though, I won't change it."
Your functions above only care about being able to iterate over a list. Ideally they shouldn't need to know who implements that list or how they implement it.
In the end, you might need to replace an implementation for any reason; performance is just one possibility. Regardless of the reason, using the least-derived type possible will reduce the need for changes in your code when you change the specific run-time type of your objects.
so its safety for you and freedom to the coder who is writing concrete implementation to change or add more C# IList Nedir functionality to his concrete class.
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Whether you return an Interface or a concrete C# IList Nedir type depends upon what you want to let your callers do with the object you created -- this is an API design decision, and there's no hard and fast rule. You have C# IList Neden Kullanmalıyız to weigh their ability to make full use of the object against their ability to easily use a portion of the objects functionality (and of course whether you WANT them to be making full use of the object).
What US checks and balances prevent the FBI from raiding politicians unfavorable to the federal government? more hot questions
Emanet you please provide me some link to a class that implements IList interface or provide me a code that at least implements Add and Remove methods?
List communicates "I need to get and set the elements of this sequence in arbitrary order and I only accept lists; I do derece accept arrays."
Özel C# IList Nedir koleksiyonlar oluşturmanıza olanak tanılamar: ölçünlü koleksiyon sınıfları gereksinimlerinizı karşıtlamıyorsa, kendi özel koleksiyonlarınızı C# CollectionBase kullanarak oluşturabilirsiniz. Bu, bilgi mimarilarınızı istediğiniz şekilde özelleştirmenizi sağlamlar.
This works, because only the outer list is created in the first place. You yaşama then insert individual items that are compatible with IList: