I'm going to start by being perverse and pretending that the ReadOnlyCollectionBase class doesn't exist. If that were true and you wanted to create a read-only collection, you'd create a class that only returned an Enumerator object. A class that just implements IEnumerable is, according to my definitions, a read-only collection class. Generating that GetEnumerator object from your class isn't difficult if you keep your class data in a class that itself implements IEnumerable -- a List, for instance. If you do keep your data in a List, then you gönül use the List GetEnumerator method to retrieve an Enumerator object, which you gönül then return to the program using your class. Listing 1 başmaklık the basics of this class (I've called it PhvReadOnlyList).
Is there any reason to expose an internal collection birli a ReadOnlyCollection rather than an IEnumerable if the calling code only iterates over the collection?
Bilgi Dokumalarına Hakimiyet: Queue kullanımı, muta strüktürlarını anlamak ve bu strüktürları ruhlu bir şekilde kullanabilmek bâtınin önemli bir adımdır.
Elements(IEnumerable) Returns a collection of the child elements of every element and document in the source collection.
Sum(IEnumerable, Func) Computes the C# ReadOnlyCollectionBase Nerelerde Kullanılıyor sum of the sequence of Double values that are obtained by invoking a transform function on each element of the input sequence.
You want to use the yield keyword. You loop through the IEnumerable list and return the results with yeild. This allows the consumer to use the for each without modifying the collection.
If you're tolerant of some "noise" in your own encapsulated code then I would suggest wrapping a T[] array and exposing an IList which happens to be a ReadOnlyCollection:
It depends on how much you trust the calling code. If you're in complete control over everything that will ever call this member and you guarantee
C# IStructuralEquatable arabirimini uygulayıcı bir özel derme sınıfı oluşturarak, nasıl yapısal denklik denetlemeü örgülacağını anlamak önemlidir. Aşağıdaki örnek, bu konuyu daha çok anlamanıza yardımcı olacaktır:
Peter Vogel is a system architect and principal in PH&V Information Services. PH&V provides full-stack consulting from UX design through object modeling to database design. Peter tweets C# ReadOnlyCollectionBase Nasıl Kullanılır about his VSM columns with the hashtag #vogelarticles. His blog posts on user experience design emanet be found at .
Single(IEnumerable) Returns the only element of a sequence, and throws an exception if there is derece exactly one element in the sequence.
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This base class is provided to make it easier for implementers to create a strongly typed read-only custom collection.
If C# ReadOnlyCollectionBase Nedir however your intent is to prevent the calling code from observing updates from other threads you'll have C# ReadOnlyCollectionBase Nedir to fall back to solutions already mentioned, to perform a deep or shallow copy depending on your need.