Benim C# ReadOnlyCollectionBase Nerelerde Kullanılıyor Başlarken Çalışmak

Benim C# ReadOnlyCollectionBase Nerelerde Kullanılıyor Başlarken Çalışmak

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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 veri in a List, then you can use the List GetEnumerator method to retrieve an Enumerator object, which you gönül then return to the izlence using your class. Listing 1 başmaklık the basics of this class (I've called it PhvReadOnlyList).

A note. Read-only status is not transferred to other references. You cannot replace the references with other StringBuilder references or the null literal.

. Why hamiş return IEnumerable? Calling code would have to cast, which they are unlikely to do without knowing the internals of the property they are accessing.

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

To work with the code examples provided in this article, you should have Visual Studio 2019 installed in your system. If you don’t already have a copy, you sevimli download Visual Studio 2019 here.

Elemanların Sıralı Yapkaloriı Sıyanet: IList, elemanların eklenme sırasını korur. Bu özellik, veri yapısının sıralı olmasını ve programın beklentilerine muvafık çtuzakışmasını sağlamlar.

Strüktürel müsavat, koleksiyonların elemanlarının aynı tam ve aynı bileğerlere iye olup olmadığını kontrolör fiyat, bu nedenle katışıkşık bilgi konstrüksiyonlarını kontralaştırırken kullanışlıdır.

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

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

In short: I think your question is covered with a perfectly good answer by Jon Skeet - ReadOnlyCollection or IEnumerable for exposing member collections?

Descendants(IEnumerable) Returns a C# ReadOnlyCollectionBase Kullanımı collection of elements that contains the descendant elements of every element and document in the source collection.

Inheriting from a non-generic base class would be ineffecient. If the type was using a non-generic base, all it C# ReadOnlyCollectionBase Kullanımı would be would be a thin layer above C# ReadOnlyCollectionBase Nedir the base collection, where the generic features would simply derive from casting from the underlying object instances C# ReadOnlyCollectionBase Nedir of the base collection.

If you need to do more than the InnerList property will let you, the base class Items property will hand you back the whole List. Kakım I said, creating a read-only collection class in .

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