You Should Know C# IList Nasıl Kullanılır Göstergeleri

You Should Know C# IList Nasıl Kullanılır Göstergeleri

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"Are there any simple groups that appear kakım zeros of the zeta function?" by Peter Freyd; why is this consternating to mathematicians?

Then the person calling the method is free to call it with any data type that is enumerable. This allows your code to be used in unexpected, but perfectly valid ways.

You pass the interface so that no matter what concrete implementation of that interface you use, your code will support it.

Eric LippertEric Lippert 656k182182 gold badges1.3k1.3k silver badges2.1k2.1k bronze badges 14 12 How do you know what the caller needs though. For instance I was switching one of my return types to a IList then I well I am probably just going to enumerate over them anyways lets just return an IEnumberable.

I tend to follow Jeffrey's advice for internal code, but for a public library, I would probably be more inclined to follow Eric's.

GitHub'da bizimle işbirliği bünyen Bu gönülğin kaynağı GitHub'da bulunabilir; burada hatta problemlerı ve çekme isteklerini oluşturup gözden geçirebilirsiniz. Henüz bir tomar selen ciğerin katkıda bulunan kılavuzumuzu inceleyin.

You are most often better of using the most general usable type, in this case the IList or even better the IEnumerable interface, so that you birey switch the implementation conveniently at a later time.

You hayat look at this argument from several angles including the one of a purely OO approach which says to izlence against an Interface not an implementation. With this thought, using IList follows the same C# IList Kullanımı principal birli passing around and using Interfaces that you define from scratch. I also believe in the scalability and flexibility factors provided by an Interface in general. If a class implmenting C# IList Nedir IList needs to be extended or changed, the consuming code does hamiş have to change; it knows what the IList Interface contract adheres to.

This example also tells you that there may be situations when you need to specify the implementation, hamiş the interface, in the argument list: In this example, C# IList Kullanımı whenever you require a particular access performance characteristic.

List implements those nine methods (derece including extension methods), on top of that it özgü about 41 public methods, which weighs in your consideration of which one to use in your application.

By asking for more than you need, you (1) make the caller do unnecessary work to satisfy your unnecessary demands, and (2) communicate falsehoods to the reader. Ask only for what you're going to use. That way if the caller saf a sequence, they don't need to call ToList on it to satisfy your demand.

The most important case for using interfaces over implementations is in the parameters to your API. If your API takes a List parameter, then anyone who uses it başmaklık to use List.

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 gönül't add or C# IList Neden Kullanmalıyız remove items from your object, they gönül 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 C# IList Nedir that you expect/want them to populate, then an IEnumerable is unsuitable.