C# ReadOnlyCollectionBase Nasıl Kullanılır Seçenekler

C# ReadOnlyCollectionBase Nasıl Kullanılır Seçenekler

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This doesn't create a copy of list. ReadOnlyCollection doesn't copy the data, it works directly on the supplied list. See documentation:

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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 .Kupkuru Framework 4.5 you sevimli use the read-only collections that Eric Vogel covered in an earlier C# Corner column, "The New Read-Only Collections in .NET 4.5," to define that property. My client, however, was working with the .NET Framework 4 and didn't intend to upgrade. Fortunately, in earlier versions of .NET you sevimli also create a read-only class from an existing List just by calling your List's AsReadOnly method. However, if you need something special (a List that users dirilik add items to but hamiş remove items from), inheriting from the ReadOnlyCollectionBase class makes that very easy to do.

Which means that I always have to cast the items back to MyItem when I want to use them. Also the items yaşama be casted into MyItem outside the class.

This base class is provided to make it easier for implementers to create a generic read-only custom collection. Implementers are encouraged to extend this base C# ReadOnlyCollectionBase Temel Özellikleri class instead of creating their own.

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

If you're tolerant of some "noise" in your own encapsulated code then I would suggest wrapping a C# ReadOnlyCollectionBase Nerelerde Kullanılıyor T[] array and exposing an IList which happens to be a ReadOnlyCollection:

HashTable hash kodlarına için dizdiğinden belli başlı bir sıralaması yoktur.Algoritması bu kodların içinde gizlidr. Dictionary ise verilerin ekleniş sırasını hiç bileğmeseletirmeden saklamıştır.

Bu yüzden her bir koleksiyonun C# ReadOnlyCollectionBase Nasıl Kullanılır performansını ve nerede kullanılması icap ettiğini düzgün bilmek gerekir. Makalemizin son kısmında, bütün koleksiyonlar yararlanma ammaçları dâhilin gruplandırılmış olup adidaki sınav koduyla ayrı ayrı performans testleri mefultır.

Elements(IEnumerable, C# ReadOnlyCollectionBase Nasıl Kullanılır XName) Returns a filtered collection of the child elements of every element and document in the source collection. Only elements that have a matching XName are included in the collection.

C# IStructuralEquatable, özellikle çeşitli bilgi yapılarının veya koleksiyonların derunğinin konstrüktif olarak içinlaştırılması müstelzim durumlarda kullanılır. Bu durumlar beyninde:

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).

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If however your intent is to prevent the calling code from observing updates from other C# ReadOnlyCollectionBase Nedir threads you'll have to fall back to solutions already mentioned, to perform a deep or shallow copy depending on your need.