Greatest Kılavuzu C# ReadOnlyCollectionBase Nasıl Kullanılır için

Greatest Kılavuzu C# ReadOnlyCollectionBase Nasıl Kullanılır için

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

Define your own class which implements IEnumerator, takes an IList in the new constructor, başmaklık a read only default item property taking an index, and does not include any properties/methods that could otherwise allow your list to me manipulated.

Example. In this izlence, a list of ints is created, and then the ReadOnlyCollection constructor is used with that List bey an argument. Inside the ReadOnlyCollection constructor, a reference to the argument is stored as an IList reference field.

List's are a very common datastructure, but creating them in this fashion involves quite a bit of syntactic noise - and it güç easily get even worse (e.g.

The following code snippet illustrates how IReadOnlyList gönül be used in place of List in the above method.

Also, native collections dirilik't be enhanced with extra data. You'll recognize this next time you find that you pass in (Collection, Extra) to more than one or two methods. It indicates that "Extra" belongs with the object containing your collection.

Yapısal müsavat, koleksiyonların elemanlarının aynı sırada ve aynı bileğerlere sahip olup olmadığını muayene eder, bu nedenle katışıkşık bilgi dokumalarını zıtlaştırırken kullanışlıdır.

Collaborate with C# ReadOnlyCollectionBase Nerelerde Kullanılıyor us on GitHub The source for this content yaşama be found on GitHub, where you dirilik also create and review issues and pull requests. For more information, see our contributor guide.

Sum(IEnumerable, Func) Computes the sum of the sequence of nullable Double values that are obtained by invoking a transform function on each element of the input sequence.

If you do this then there's nothing stopping your callers casting the IEnumerable back to ICollection and then modifying it. ReadOnlyCollection C# ReadOnlyCollectionBase Nedir removes this possibility, although it's still possible to access the underlying writable collection via reflection.

Implementers are encouraged to extend this base class instead of creating their own. Members of this base class are protected and are intended to be used through a derived class only.

Note: The StringBuilder references themselves are read-only, but the memory pointed to by the references are still mutable.

On C# ReadOnlyCollectionBase Kullanımı the other hand, let's say you have C# ReadOnlyCollectionBase Kullanımı a ReadOnlyCollection(StringBuilder). This is kind of a strange thing to have, but it is acceptable. You dirilik still change the individual StringBuilder objects by C# ReadOnlyCollectionBase Nerelerde Kullanılıyor accessing their methods.

Chances are, you'll never notice this difference, but if this is a hot-ışıntı in your code and requires every last bit of performance you gönül squeeze out of it, why not use an Array instead? That would be faster still.