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.

C# CollectionBase dershaneı, özelleştirilebilir koleksiyonların oluşturulmasını sağlamlar ve bu sayede yazılım projelerinde elastikiyet ve yeniden kullanılabilirlik katkısızlar.

Edit: You do need to be quick to get answers in here. Kakım I presented a slightly different syntax to the other answers, I will leave my answer - however, the other answers presented are equally valid.

Yaşama a unique position be deduced if pieces are replaced by checkers (hayat see piece color but derece type)

In this specific case since you're essentially talking about a language construct, not a custom one it generally won't matter, but say for example that you found List didn't support something you needed.

Architecture Astronauts. The chances you will ever write your own IList that adds anything to the ones already in the .NET framework are so remote that it's theoretical jelly tots reserved for "best practices".

I thought I'd never need to change from a List but had to later change to use a custom list library for the extra C# IList Nerelerde Kullanılıyor functionality it provided. Because I'd only returned an IList none of the people that used the library had to change their code.

Don't you know in advance if your method needs a list that dirilik take additional members; don't you specify that in the method signature? What exactly were you going to do if you were C# IList Kullanımı passed a read only list like int[]?

In most cases, if you are using a List and you think you could use a narrower interface C# IList Nedir instead - why not IEnumerable? This is often a better fit if you don't need to C# IList Kullanımı add items. If you need to add to the collection, use the concrete type, List.

Coming soon: C# IList Kullanımı Throughout 2024 we will be phasing out GitHub Issues as the feedback mechanism for content and replacing it with a new feedback system. For more information see: .

private List _numbers; // callers can add/update/remove elements, but cannot reassign a new list to this property

Bu örnekte, Student adında bir dershane ve StudentCollection isminde CollectionBase klasından türeyen özel bir koleksiyon derslikı oluşturduk.

for your return types. This gives your callers the most flexibility in passing in types to your methods and the most opportunities to cast/reuse the return values.

If you had used IList in the rest of the app you could extend List with your own custom class and still be able to pass that around without refactoring.