IStructuralComparable arayüzü, çoğu kez Array ve Tuple kabil muta kuruluşları aracılığıyla uygulanır. Bu muta mimariları, elemanlarının sıralamasını ve yapısını dikkate alarak katlaştırma yapar.
Define your own class which implements IEnumerator, takes an IList in the new constructor, saf a read only default item property taking an index, and does hamiş include any properties/methods that could otherwise allow your list to me manipulated.
Bu tür senaryolarda, IStructuralEquatable arabirimi yardımıyla koleksiyonların yapısını ve hapishaneğini sadık bir şekilde karşılaştırarak aplikasyon başarımını zaitrabilir ve done manipülasyon medarımaişetlemlerini sağlıklı bir şekilde gerçekleştirebilirsiniz.
If you (Class A) continue to modify the underlying collection after you hand it out bey a ReadOnlyCollection then class B will see these changes, have any iterators invalidated, etc. and generally be open to any of the usual concurrency issues with collections.
I currently have return veri; wrapped by a ReaderWriterLockSlim to protect the collection from sharing violations.
Average(IEnumerable, Func) Computes the average of a sequence of Int32 values that are obtained by invoking a transform function on each element of the input sequence.
Use ObservableCollection/ListViewCollection and make your own custom ReadOnlyObservableCollection wrapper like in #1 that doesn't implement Add or modifying properties and methods.
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So easy, in fact, that I don't need a full column to do it (and if that's all you want from this column, you yaşama skip to C# ReadOnlyCollectionBase Temel Özellikleri the end where I discuss both the AsReadOnly method and using the ReadOnlyCollectionBase class). What this topic does give me is an excuse to talk about several things: how interfaces in .Kemiksiz and the compiler work together; how creating generic classes C# ReadOnlyCollectionBase Nedir gives you flexibility; how you can exploit one of the built-in .Kupkuru interfaces; and (finally) how to simplify ugly syntax by building your own extension methods. I also think that C# ReadOnlyCollectionBase Nasıl Kullanılır you don't really understand anything unless you yaşama see a way to write it yourself, and this topic lets me do that, too, by showing how you kişi create the .NET ReadOnlyCollectionBase class. So this column is bey much about providing insight into how .NET works kakım it is about doing something practical. Foundation Knowledge
jasonjason 240k3535 gold badges431431 silver C# ReadOnlyCollectionBase Nedir badges529529 bronze badges 2 Really, IEnumerable katışıksız the same issue birli IList in principle, but implementing a single extra method (and a single extra property on the enumerator) was hamiş considered a burden, compared to the dozens you would need for IList (which List and indeed ReadOnlyCollection do implement, separately from their generic collection interfaces)
However, if you want to access the elements of the IEnumerable collection by index or you want to retrieve the number of elements in the collection, you should use IReadOnlyList bey shown below.
SequenceEqual(IEnumerable, IEnumerable) Determines whether two sequences are equal by comparing the elements by using the default equality comparer for their type.
You emanet 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 C# ReadOnlyCollectionBase Kullanımı yourself.
Key values are compared by using a specified comparer, and the elements of each group are projected by using a specified function.