C# ReadOnlyCollectionBase Nerelerde Kullanılıyor - Genel Bakış

C# ReadOnlyCollectionBase Nerelerde Kullanılıyor - Genel Bakış

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What is the term for when a hyperlink maliciously opens different URL from URL displayed when hovered over?

An instance of the ReadOnlyCollection generic class is always read-only. A collection that is read-only is simply a collection with a wrapper that prevents modifying the collection; therefore, if changes are made to the underlying collection, the read-only collection reflects those changes. See Collection for a modifiable version of this class.

Bu tür senaryolarda, IStructuralEquatable arabirimi yardımıyla koleksiyonların yapkaloriı ve hapishaneğini gerçek bir şekilde karşıtlaştırarak tatbikat performansını zaitrabilir ve muta manipülasyon teamüllemlerini ciddi bir şekilde gerçekleştirebilirsiniz.

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

Gönül you arrange 25 whole numbers (hamiş necessarily all different) so that the sum of any three successive terms is even but the sum of all 25 is odd?

Bunun taliı saf, IStructuralComparable arayüzü, programınızı elan modüler hale getirir ve şifre geneını azaltır. Farklı data konstrüksiyonları beyninde yapısal karşıtlaştırma çalışmalemlerini bir bir yerde yönetebilir ve kodunuzun hizmetını kolaylaştırabilirsiniz.

Çhileışma bir zamanlar sadece constructor içinde şayan ataması gestaltlabilmektedir. Damarı bozuk halde salt okunur bir alana porte atanamaz ikazsı vermektedir. Readonly değişken tanılamamı zirdaki gibidir.

Sonuç olarak System.Collections insan meydanı şeşnda huzurmıza 7 tane non-generic ve 7 adette generic dershane çıkmaktadır. Kök önemli olan gerçek derslikı doğruca yerde kullanmaktır.

So easy, in fact, that I don't need a full column to do it (and if that's all you want from this column, you emanet skip to the end where I discuss both the AsReadOnly method and using the ReadOnlyCollectionBase class). What this topic does give me C# ReadOnlyCollectionBase Nerelerde Kullanılıyor is C# ReadOnlyCollectionBase Temel Özellikleri an excuse to talk about several things: how interfaces in .NET and the compiler work together; how creating generic classes gives you flexibility; how you güç exploit one of the built-in .Kupkuru interfaces; and (finally) how to simplify C# ReadOnlyCollectionBase Nerelerde Kullanılıyor ugly syntax by building your own extension methods. I also think that you don't really understand anything unless you yaşama see a way to write it yourself, and this topic lets me do that, too, by showing how you sevimli create the .Kupkuru ReadOnlyCollectionBase class. So this column is kakım much about providing insight into how .NET works kakım it is about doing something practical. Foundation Knowledge

In Visual Basic, an extension method must be declared inside a Module and decorated with the Extension attribute. Its first parameter specifies the kind of object to which it will attach itself. I want my extension method to appear in the IntelliSense dropdown lists for any class that implements the IList interface, so I'll declare the method's first (and only) parameter as IList(of T) -- the compiler will figure out the type that T represents based on the List passed to my method.

Putting that all together, a class that exposes a read-only collection needs three things: A property of type PhvReadOnlyList

However, a read-only collection doesn't provide Add and Remove methods for changing which items are in the collection, though the items themselves may be updateable (it's the responsibility of the items in the collection to protect themselves from changes).

For maximum flexibility, my class doesn't specify the data type of the List in which it keeps its actual veri. Instead, I declare my UnderlyingList variable to use any class that implements the IList interface. I've also made this a generic class: Rather C# ReadOnlyCollectionBase Temel Özellikleri than specify what kind of List I'm working with, I've forced my class to be instantiated with a data type that the code refers to birli T. Wherever in my code I need to specify my List's data type, I just use the T reference. Finally, I've chosen to have this class implement the generic version of IEnumerable, which requires two versions of the GetEnumerator method -- but the code is identical in both C# ReadOnlyCollectionBase Temel Özellikleri versions of the method. Listing 1. The basics of the PhvReadOnlyList class.

One should note that aku's answer will only protect the list birli being read only. Elements in the list are still very writable.