Hakkında C# ReadOnlyCollectionBase Temel Özellikleri

Hakkında C# ReadOnlyCollectionBase Temel Özellikleri

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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 veri in a class that itself implements IEnumerable -- a List, for instance. If you do keep your veri in a List, then you dirilik use the List GetEnumerator method to retrieve an Enumerator object, which you emanet then return to the program using your class. Listing 1 başmaklık the basics of this class (I've called it PhvReadOnlyList).

In programs, an immutable collection dirilik be used with less copying—we do derece need to worry about it being modified. This can make programs simpler and easier to reason about.

DescendantNodes(IEnumerable) Returns a collection of the descendant nodes of every document and element in the source collection.

Bir metodu güncellemek veya takas etmek istediğinizde, sırf metodu değdavranıştirmeniz kifayetli olacaktır. öteki harf alanlarına dokunmanıza ister kalmaz, bu da hataları önlemenizi ve projenizi henüz hızlı ve kredili bir şekilde güncellemenizi katkısızlar.

Now when you use IntelliSense to inspect IReadOnlyList, you’ll no longer see Add among the supported methods. Figure 2 below displays the members of the IReadOnlyList instance.

Elemanların Sıralı Yapkaloriı Saye: IList, elemanların eklenme sırasını korur. Bu özellik, veri yapısının sıralı olmasını ve izlenceın beklentilerine münasip çkızılışmasını sağlamlar.

Matthew WatsonMatthew Watson 108k1111 gold badges170170 silver badges290290 bronze badges 2 2 To avoid that a client gets a writable object by downcasting, WritableMyItem (and IWritableMyItem if used) could be made private or internal.

; but this question convinced me to go ahead and announce an open source project I've had in the works for a while (still a work in progress, but there's some useful stuff in there), which includes an IArray interface (and implementations, naturally) that I think captures exactly what you want here: an indexed, read-only, even covariant

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

Key değerine için bile bir indeksleyici çitndırır. Bu arayüzlü koleksiyonların seçilme sebebi indeks bileğerlerinin sabit kalma isteğidir. Bir bilgi silindiğinde arkasındaki C# ReadOnlyCollectionBase Kullanımı verilerin indeks değerleri sabit kalır.

However, the syntax is awkward. Adding an extension method gönül simplify that syntax tremendously. Extension methods have at least three convenient features: The first is that they attach themselves to whatever classes you specify, automatically appearing in the IntelliSense dropdown lists for those objects; second, they're automatically passed whatever object they're called from kakım their first parameter; third, when an extension method is used with a generic class C# ReadOnlyCollectionBase Nasıl Kullanılır (for instance, List), the method automatically figures out the veri type of the generic parameter.

SingleOrDefault(IEnumerable, Func) Returns the only element of a sequence that satisfies a specified condition or a default value if no such element exists; this method throws an C# ReadOnlyCollectionBase Temel Özellikleri exception if more than one element satisfies the condition.

When you pass around collections instead of writing an object biçim, entire classes of refactorings will never occur to you.

Sum(IEnumerable, Func) Computes the sum of the sequence of nullable Decimal values C# ReadOnlyCollectionBase Nedir that are C# ReadOnlyCollectionBase Kullanımı obtained by invoking a transform function on each element of the input sequence.