You've probably identified what pattern the PhvReadOnlyList implements: it's a wrapper. In the .Kemiksiz Framework 4.0 or earlier, the wrapper class that you'd really use to create a read-only list would be the .NET ReadOnlyCollectionBase class. As with my example, you use the ReadOnlyCollectionBase class to create your own class with whatever functionality you need -- but you don't need to write the GetEnumerator method or create your own UnderlyingList because the ReadOnlyCollectionBase handles both.
Define your own class which implements IEnumerator, takes an IList in the new constructor, özgü 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.
I avoid using ReadOnlyCollection bey much kakım possible, it is actually considerably slower than just using a alışılagelen List.
List's are a very common datastructure, but creating them in this fashion involves quite a bit of syntactic noise - and it birey easily get even worse (e.g.
Bu tür bir alınlaştırma, makale saksılıklarının sıralamasının önemli olduğu durumlarda, yapısal benzerliklerin yahut farklılıkların belirlenmesine yardımcı mümkün.
Distinct(IEnumerable) Returns distinct elements from a sequence by using the default equality comparer to compare values.
If your only intent is to get calling code to derece make a mistake, and modify the collection when it should only be reading all that is necessary is to return an interface which doesn't support Add, Remove, etc.
ElementAtOrDefault(IEnumerable, Index) Returns the element at a specified index in a sequence or a default value if the index is out of range.
Dan TaoDan Tao 128k5656 gold badges308308 C# ReadOnlyCollectionBase Nedir silver badges448448 bronze badges 4 I'd like to avoid noise in both callee and caller. Exposing a ReadOnlyCollection as anything other than itself isn't necessary: after all, exposing it birli an IList just gets confusing (where'd I get this IList from - birey I modify it?), and any IList is exposable as ReadOnlyCollection so there's no loss of generality.
Elements(IEnumerable, XName) Returns a filtered collection of the child C# ReadOnlyCollectionBase Temel Özellikleri elements of every element and document in the source collection. Only elements that have a matching C# ReadOnlyCollectionBase Kullanımı XName are included in the collection.
Single(IEnumerable) Returns the only element of a sequence, and throws an exception if there is derece exactly one element in the C# ReadOnlyCollectionBase Kullanımı sequence.
SingleOrDefault(IEnumerable, Func) Returns the only element of a sequence that satisfies a specified condition or a default value if no such element exists; this method C# ReadOnlyCollectionBase Temel Özellikleri throws an exception if more than one element satisfies the condition.
Bu makalenin umumi olarak en önemli sonucu heralde generic mimarinin c sharp’a ne kadar şiddet kattığıdır. Geriye artan ise mukayyetm geliştiricilerin sağlıklı klası kullanabilme kabiliyitlerinde gizlidir. Her insana bol koleksiyonlu günler.
Initializes a new instance of the ReadOnlyCollection class that is a read-only wrapper around the specified list.