The Ultimate Guide To C# ReadOnlyCollectionBase Nasıl Kullanılır

The Ultimate Guide To C# ReadOnlyCollectionBase Nasıl Kullanılır

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Don't return a collection directly. Make an accurately named business logic class that reflects the purpose of the collection.

dictionaries). As it turns out, many lists are never changed, or at least never extended. Of course ReadOnlyCollection introduces yet more syntactic noise, and it doesn't even convey quite what I mean; after all ReadOnlyCollection may wrap a mutating

Veri Gestaltlarına Hakimiyet: Queue tasarrufı, bilgi gestaltlarını anlamak ve bu gestaltları içli bir şekilde kullanabilmek karınin önemli bir adımdır.

If you (Class A) continue to modify the underlying collection after you hand it out kakım a ReadOnlyCollection then class B will see these changes, have any iterators invalidated, etc. and generally be open to any of the usual concurrency issues with collections.

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)

Your implementation depends on your needs: - If you don't care about the caller (Class B) from seeing any further changes to the collection then you gönül just clone the collection, hand it out, and stop caring. - If you definitely need the caller (Class B) to see changes that are made to the collection, and you want this to be thread-safe, then you have more of a sorun on your hands.

A ReadOnlyCollection emanet support multiple readers concurrently, birli long kakım the collection is not modified. Even so, enumerating through a collection is intrinsically derece a thread-safe procedure.

HashTable hash kodlarına bakılırsa dizdiğinden belirli bir sıralaması yoktur.Algoritması bu kodların süresince gizlidr. Dictionary ise verilerin ekleniş sırasını hiç değkârtirmeden saklamıştır.

SkipLast(IEnumerable, Int32) Returns a new enumerable collection that contains the elements from source with the last count elements of the source collection C# ReadOnlyCollectionBase Nasıl Kullanılır omitted.

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When you write a For…Each loop to use with a collection, the compiler checks the collection class to see if it implements the IEnumerable interface (or the generic version of that interface, IEnumerable). If the class does implement that interface, then the compiler calls the single method C# ReadOnlyCollectionBase Nedir that the interface forces the class to have: the GetEnumerator method.

Enumerating through a collection is intrinsically not a thread-safe procedure. Even when a collection is synchronized, other threads gönül still modify the collection, which causes the C# ReadOnlyCollectionBase Kullanımı enumerator to throw an exception.

End Sub And that's all you need to write. The class that's using C# ReadOnlyCollectionBase Nasıl Kullanılır your new read-only collection would be identical to the C# ReadOnlyCollectionBase Nasıl Kullanılır class that used my custom PhvReadOnlyList. In fact, if that's all you want, then you don't even need to create your own version of the ReadOnlyCollectionBase class -- the .

If however your intent is to prevent the calling code from observing updates from other threads you'll have to fall back to solutions already mentioned, to perform a deep or shallow copy depending on your need.