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

-SortedDictionary: Bu derme HashTable ve SortedList sınıflarının yoğurulmasıyla oluşmuş bir sınıftır. Aralarında çok narin farklar vardır. SortedList’ten henüz fazla zihin kullanır.

I had a client recently who wanted me to create a class that exposed a read-only collection through one of the class properties. While my client was willing to let other programs loop through that collection and retrieve items from the collection by position, he didn't want to let those programs add or remove items from the collection. In the Microsoft .Kemiksiz Framework 4.5 you emanet use the read-only collections that Eric Vogel covered in an earlier C# Corner column, "The New Read-Only Collections in .Kupkuru 4.5," to define that property. My client, however, was working with the .Kupkuru Framework 4 and didn't intend to upgrade. Fortunately, in earlier versions of .NET you emanet also create a read-only class from an existing List just by calling your List's AsReadOnly method. However, if C# ReadOnlyCollectionBase Nedir you need something special (a List that users hayat add items to but not remove items from), inheriting from the ReadOnlyCollectionBase class makes that very easy to do.

Elements(IEnumerable) Returns a collection of the child elements of every element and document in the source collection.

A collection C# ReadOnlyCollectionBase Nasıl Kullanılır 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 C# ReadOnlyCollectionBase Nedir read-only collection reflects those changes.

Average(IEnumerable, Func) Computes the average of a sequence of Int32 values that are obtained by invoking a transform function on each element of the input sequence.

Koleksiyonların Yapısal önlaştırması: IStructuralEquatable arabirimi, özellikle diziler ve koleksiyonlar üzere strüktürel muta yapılarının karşıtlaştırılması sinein kullanılır.

Average(IEnumerable, Func) Computes C# ReadOnlyCollectionBase Kullanımı the average of a sequence of nullable Int32 values that are obtained by invoking a transform function on each element of the input sequence.

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

jasonjason 240k3535 gold badges431431 silver badges529529 bronze badges 2 Really, IEnumerable saf the same issue kakım IList in principle, but implementing a single extra method (and a single extra property on the enumerator) was derece considered a burden, compared to the dozens you would need for IList (which List and indeed ReadOnlyCollection do implement, separately from their generic collection interfaces)

One might derece realize that the collection is read-only but the variable pointing to it is not. What a ReadOnlyCollection would mean if I yaşama reassign the variable itself to a new collection altogether. +1.

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System.Collections data muhafaza dâhilin kullanılan yegane sınıflarımızın bulunduğu C# ReadOnlyCollectionBase Temel Özellikleri kişi düzlükıdır. Bu kayran şeşndaki melez sınıflar ve arayüzler karşı yazgılmış bilgiler her ne kadar çokça olsa da bazı belirsizlikleri giderememesi bu makaleyi yazmamdaki temel yalnızç olmuşdolaşma.

This causes unnecessary boxing/unboxing of value types. One of the benefits of using generics is the avoidance of such boxing/unboxing which could have a detremintal effect on the performance of the collections.