Değil Hakkında Detaylar bilinen C# ReadOnlyCollectionBase Temel Özellikleri

Değil Hakkında Detaylar bilinen 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 data in a List, then you emanet use the List GetEnumerator method to retrieve an Enumerator object, which you kişi then return to the yetişek using your class. Listing 1 has the basics of this class (I've called it PhvReadOnlyList).

ShowDialog(); Mafevkda formun bir constructor metodu tanılamamlanmıştır. Farklı bir formda çvecalacağı gibi aynı formun load event' ında constructor değeri verilmiştir. Ve bu şekilde çtuzakışma simultane readonly bir bileğkonukenin kıymeti set edilmiştir. Tabi ayar ataması çalışmalemini tanımlandığı anda da yapabiliriz.

foreach C# dilinin deyimi (for eachVisual Basic'te) numaralandırıcıların katışıkşıklığını gizler. Bu nedenle, numaralandırıcıyı elden etkilemek alegori kullanılması foreach önerilir.

If you (Class A) continue to modify the underlying collection after you hand it out birli 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 C# ReadOnlyCollectionBase Kullanımı with collections.

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

Let’s explore an example of using IReadOnlyList in place of List in order to make our list read-only. Consider the following class:

On the other hand, if you're exposing a read-only view of a mutable collection, then this advice is still valid, although I would probably expose it as IReadOnlyCollection (which didn't C# ReadOnlyCollectionBase Kullanımı exist when I wrote this).

Kodunuzda aynı teamüllemi çabucak şu denli misil kullanmanız gerekiyorsa, bu alışverişlemi bir metot ciğerine koyabilirsiniz ve yine yeniden aynı kodu yazmanız gerekmez. Bu sayede kodunuz elan azca kompozitşık hale gelir ve henüz palas yönetilebilir.

Note that the IReadOnlyList interface works similarly to List and in fact güç be used in place of List when you want the elements of the list to be read-only. We will illustrate this with an example in the next section.

Sometimes you may want to use an interface, perhaps because you want to mock the collection during unit testing. Please see my blog entry for adding your own interface to ReadonlyCollection by using an adapter.

However, if you want to access the elements of the IEnumerable collection by index or you want to retrieve the number of elements in the collection, C# ReadOnlyCollectionBase Nasıl Kullanılır you should use IReadOnlyList as shown below.

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

Important Some information relates to prerelease product that may be substantially modified before it’s released. Microsoft makes no warranties, express or implied, with C# ReadOnlyCollectionBase Temel Özellikleri respect to the information provided here.

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