C# IList Nasıl Kullanılır Hakkında Gerçekler Açığa

C# IList Nasıl Kullanılır Hakkında Gerçekler Açığa

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Else use List. You kişi't really argue "oh but I KNOW that I will always pass in a List here", then you should take a List hamiş an IList, else you are breaking Liskov substitution principle: "if S is a subtype of T, then objects of type T may be replaced with objects of type S"

Bu şekilde listelerin birbirini point etmesi ve rabıtlı listenin elemanlarına boy bos verilmesi sağlamlanmaktadır.

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, hamiş add or remove. Accepting an interface kakım 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.

Your code is now broken, because int[] implements IList, but is of fixed size. The contract for ICollection (the base of IList) requires the code that uses it to check the IsReadOnly flag before attempting to add or remove items from the collection. The contract for List does derece.

IList on the other hand is an Interface. Basically, if you want to create your own custom List, say a list class called BookList, then you kişi use the Interface to give you basic methods and structure to your new class. IList is for C# IList Kullanımı when you want to create your own, special sub-class that implements List.

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Matthew WatsonMatthew Watson 108k1111 gold badges170170 silver badges290290 bronze badges 2 2 This is trivially true for every interface. If you want to follow through with your argument, than you could argue to never use any interface at all, because some implementation of it might throw.

For example, let's say you have a C# IList Nedir Person class and a Group class. A Group instance başmaklık many people, so a List here would make sense. When I declare the list object in Group I will use an IList and instantiate it kakım a List.

API Entegrasyonu: Dış API'lerden kırmızıınan C# IList Nedir verileri yürümek ve yönetmek bâtınin kullanılabilir, bu da icraat arası C# IList Neden Kullanmalıyız data işini kolaylaştırır.

IList is derece a class; it's an interface that classes sevimli implement. The interface itself is just a contract between the consumer of the class and the class itself. This C# IList Neden Kullanmalıyız line of code will work:

You might want to have an IOrderRepository that defines a collection of orders in either a IList or ICollection. You could then have different kinds of implementations to provide a list of orders birli long as they conform to "rules" defined by your IList or ICollection.

I have two ILists of the same type returned by NHibernate and have emerged the two IList into one, hence the need for sorting.

For instance, if you return an IEnumerable, then you are limiting them to iterating -- they yaşama't add or remove items from your object, they can only act against the objects. If you need to expose a collection outside of a class, but don't want to let the caller change the collection, this is one way of doing it. On the other hand, if you are returning an empty collection that you expect/want them to populate, then an IEnumerable is unsuitable.