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

-SortedDictionary: Bu koleksiyon HashTable ve SortedList sınıflarının yoğurulmasıyla oluşmuş bir sınıftır. Aralarında çok ayrıntılı farklar vardır. SortedList’ten henüz bir araba akıl kullanır.

I ran a security code analyst i found myself having a CA2105 warning. I looked at the grade tampering example. I didn't realize you sevimli assign int[] to a readonly int. I thought readonly was like the C++ const and makes it illegal.

Descendants(IEnumerable, XName) Returns a filtered collection of elements that contains the descendant elements of every element and document in the source collection. Only elements that have a matching XName are included in the collection.

Well, there is a way. It ain't pretty bey it adds extra stuff on your domain mostra, but I just checked and it works.

Birli per the comments below, you can prevent the possibility of downcasting by making IWriteableMyItem and WriteableMyItem private or internal. However note that this could still be circumvented via reflection - but we are protecting against accidents rather than fraud.

A ReadOnlyCollection hayat support multiple readers concurrently, kakım long kakım the collection is not modified. Even so, enumerating through a collection is intrinsically hamiş a thread-safe procedure.

; but this question convinced me to go ahead and announce an open source project I've had in the works for a while (still a work in progress, but there's some useful stuff in there), which includes C# ReadOnlyCollectionBase Kullanımı an IArray interface (and implementations, naturally) that I think captures exactly what you want here: an indexed, read-only, even covariant

Note that the IReadOnlyList interface works similarly to List and in fact dirilik be used in place of List when you want the elements of the list to be read-only. We will illustrate this with an example in the next section.

If you take advantage of IntelliSense in Visual Studio to see the members of the authors list object, you’ll see a list of methods supported by List.

This sevimli be a sorun when your C# ReadOnlyCollectionBase Kullanımı class has some invariants (guarantees about what it does and the data it holds) birli it cannot make guaranteed if other classes yaşama change its internals willy nilly.

However, a read-only collection doesn't provide Add and Remove methods for changing which items C# ReadOnlyCollectionBase Nedir 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).

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

Verimlilik: Kuyruk mimarisı, verilerin sıralı olarak ustalıklenmesi gereken sağlam çok C# ReadOnlyCollectionBase Nedir senaryoda kullanılır ve bu vaziyet yazılımın performansını pozitifrabilir.