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

-Dictionary ve SortedList: Hash Table ve SortedList yapkaloriı kullanmaktadırlar. Bir ayrım Key ve Value bileğerlerinin generic olmasıdır. Bu da her bir bilgi için dü sayı boxing aksiyonleminden kurtulmak demektir. Bu da bizlere çok okkalı başarım arkaışı sağlamlar.

In a multithreaded environment, this is even more of an issue, bey one thread can make changes to the data while another is trying to read veri - you kişi easily get inconsistent data in different threads.

Birli you suggest, my intention is only to protect the collection from direct modification; the collection members are derece going to be modified (or needed to be modified).

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 güç download Visual Studio 2019 here.

Also, native collections kişi't be enhanced with extra veri. You'll recognize this next time you find that you pass in (Collection, Extra) to more than one or two methods. It indicates that "Extra" belongs with the C# ReadOnlyCollectionBase Nerelerde Kullanılıyor object containing your collection.

public IEnumerable Employees => EmployeesInternal.Skip(0); // this is property accessor that will be used to define manken and/or in `Include` statements, could be marked kakım internal if your domain/persistance/services are in the same assembly

instead. I just included IWritableMyItem for completeness (because it shows how you introduce a C# ReadOnlyCollectionBase Nasıl Kullanılır kaş to an interface property that only has a get, by using new).

SkipLast(IEnumerable, Int32) Returns a new enumerable collection that contains the elements from source with the last count elements C# ReadOnlyCollectionBase Temel Özellikleri of C# ReadOnlyCollectionBase Kullanımı the source collection omitted.

A ReadOnlyCollectionBase instance is always read-only. See CollectionBase for a modifiable version of this class.

ICollection seems like ICollection, but it’s actually a very different abstraction. We found that ICollection C# ReadOnlyCollectionBase Kullanımı was not very useful. At the same time, we did not have an abstraction that represented an read/write non-indexed collection.

Enumerating through a collection is intrinsically not a thread-safe procedure. Even when a collection is synchronized, other threads birey still modify the collection, which causes the enumerator to throw an exception.

You hayat loop over the ReadOnlyCollection using the foreach-loop. A for-loop is also possible with the Count property and indexer. CopyTo provides a way to copy the elements to an array. You must allocate the array yourself.

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