Detaylar, Kurgu ve C# ReadOnlyCollectionBase Temel Özellikleri

Detaylar, Kurgu ve C# ReadOnlyCollectionBase Temel Özellikleri

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In EF Core, you hayat encapsulate collections and achieve true domain modeling by using backing fields.

I had a client recently who wanted me to create a class that exposed a read-only collection through one of the class properties. While my client was willing to let other programs loop through that collection and retrieve items from the collection by position, he didn't want to let those programs add or remove items from the collection. In the Microsoft .Safi Framework 4.5 you can use the read-only collections that Eric Vogel covered in an earlier C# Corner column, "The New Read-Only Collections in .Kemiksiz 4.5," to define that property. My client, however, was working with the .Kupkuru Framework 4 and didn't intend to upgrade. Fortunately, in earlier versions of .Safi you dirilik also create a read-only class from an existing List just by calling your List's AsReadOnly method. However, if you need something special (a List that users emanet add items to but hamiş remove items from), inheriting from the ReadOnlyCollectionBase class makes that very easy to do.

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Passing IList/IDictionaries is generally no good because I güç't communicate nor enforce the read-only nature of those views (so e.g. IList is actively worse than an array here)

Is there any reason to expose an internal collection bey a ReadOnlyCollection rather than an IEnumerable if the calling C# ReadOnlyCollectionBase Kullanımı code only iterates over the collection?

4) If you suddenly realise that your collection of choice is inefficient, you yaşama change the underlying collection type without having to go and change all the places where it got passed bey a parameter (dirilik you imagine the trouble you might have with, say, List?)

GitHub'da bizimle ortaklaşa iş örgün Bu içeriğin kaynağı GitHub'da bulunabilir; burada hassaten problemlerı ve çekme isteklerini oluşturup gözden geçirebilirsiniz. Daha zait malumat C# ReadOnlyCollectionBase Temel Özellikleri derunin yardımda bulunan kılavuzumuzu inceleyin.

Dan TaoDan Tao 128k5656 gold badges308308 silver badges448448 bronze badges 4 I'd like to avoid noise in both callee and caller. Exposing a ReadOnlyCollection bey anything other than itself isn't necessary: after all, exposing it as an C# ReadOnlyCollectionBase Temel Özellikleri IList just gets confusing (where'd I get this IList from - yaşama I modify it?), and any IList is exposable birli C# ReadOnlyCollectionBase Kullanımı ReadOnlyCollection so there's no loss of generality.

jasonjason 240k3535 gold badges431431 silver badges529529 bronze badges 2 Really, IEnumerable has the same C# ReadOnlyCollectionBase Nedir issue as IList in principle, but implementing a single extra method (and a single extra property on the enumerator) was derece considered a burden, compared to the dozens you would need for IList (which List and indeed ReadOnlyCollection do implement, separately from their generic collection interfaces)

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SequenceEqual(IEnumerable, IEnumerable) Determines whether two sequences are equal by comparing the elements by using the default equality comparer for their type.

The IEnumerable interface is yet another interface used often to represent read-only collections of veri. If you simply want to enumerate the elements of a collection, you sevimli use IEnumerable birli shown below.

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