C# ReadOnlyCollectionBase Nasıl Kullanılır No Further Mystery

C# ReadOnlyCollectionBase Nasıl Kullanılır No Further Mystery

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The collection used here is clearly mutable in nature. So how do you prevent this veri from being changed?

Define your own class which implements IEnumerator, takes an IList in the new constructor, has a read only default item property taking an index, and does not include any properties/methods that could otherwise allow your list to me manipulated.

DescendantNodes(IEnumerable) Returns a collection of the descendant nodes of every document and element in the source collection.

If your veri can be enumerated, you dirilik use Enumerable.ToList method to cast your collection to List and call AsReadOnly on it.

Passing IList/IDictionaries is generally no good because I gönül't communicate nor enforce the read-only nature of those views (so e.g. IList is actively worse than an array here)

Birli I see it IEnumerable is a subset of the interface of ReadOnlyCollection and it does hamiş allow the user to modify the collection. So if the IEnumberable interface is enough then that is the one to use. Is that a proper way of reasoning about it or am I missing something?

Note also that this makes your sorun particularly birçok. If you don't want people changing the collections, your container need contain C# ReadOnlyCollectionBase Nedir no mutators. If you decide later that in just one case you actually HAVE to modify it, you güç create a safe mechanism to do so.

ElementAtOrDefault(IEnumerable, Index) Returns the element at a specified index in a sequence or a default value if the index is C# ReadOnlyCollectionBase Nerelerde Kullanılıyor out of range.

Birey you arrange 25 whole numbers (not necessarily all different) so that the sum of any three successive terms is even but the sum of all 25 is C# ReadOnlyCollectionBase Nasıl Kullanılır odd? more hot questions

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

Single(IEnumerable) Returns the only C# ReadOnlyCollectionBase Nerelerde Kullanılıyor element of a sequence, and throws an exception if there is hamiş exactly one element in the sequence.

So, what's the best-practice way to deal with the bog-standard task of making small collections to pass around values? Should array be preferred over List where possible?

This base class is provided to make it easier for implementers to create a strongly typed read-only custom collection.

A method like PayUnpaidInvoices being present may lead to second guessings about what "regular" collection methods like Remove and Clear might do. Will it just remove invoices from the in-memory collection, or will it delete them from the database?