This doesn't create a copy of list. ReadOnlyCollection doesn't copy the data, it works directly on the supplied list. See documentation:
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Yaşama 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 odd?
List's are a very common datastructure, but creating them in this fashion involves quite a bit of syntactic noise - and it sevimli easily get even worse (e.g.
The main advantage of this comes in the fact that you birey't add code to collections so whenever you have a native "collection" in your object prototip, you ALWAYS have non-OO support code spread throughout your project to access it.
The single line of code required by my extension method just instantiates my PhvReadOnly class (using the datatype that the extension method katışıksız deduced), passing whatever IList object the extension method is being used on.
Note also that this makes your sorun particularly birçok. If you don't want people changing the collections, your container need contain no mutators. If you decide later that in just one case you actually HAVE to modify it, you birey create a safe mechanism to do so.
Nedeniyle güç istenirse Array, az bellek kullanımı istenirse List yeğleme edilmelidir. şayet koleksiyona eklenicek C# ReadOnlyCollectionBase Nedir tip sınırlı bileğilse ArrayList kullanılabilir. Ama aynı aksiyonlevi generic listemizde içinlayabilme yetisine sahiptir.
I've implemented AReadOnlyList birli a read-only property because I'm assuming that if you don't want programs adding or removing items from your collection, you probably don't want programs shoving whole new collections into your property, either. Simplifying Code with Extension Methods
In Visual Basic, an extension method must be C# ReadOnlyCollectionBase Kullanımı declared inside a Module and decorated with the Extension attribute. Its first parameter specifies the kind C# ReadOnlyCollectionBase Temel Özellikleri of object to which it will attach itself. I want my extension method to appear in the IntelliSense dropdown lists for any class that implements the C# ReadOnlyCollectionBase Temel Özellikleri IList interface, so I'll declare the method's first (and only) parameter bey IList(of T) -- the compiler will figure out the type that T represents based on the List passed to my method.
One possibility C# ReadOnlyCollectionBase Temel Özellikleri is to implement your own thread-safe variant of the ReadOnlyCollection to allow locked access, though this will be non-trivial and non-performant if you want to support IEnumerable, and it still
Nodes(IEnumerable) Returns a collection of the child nodes of every document and element in the source collection.
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I have a readOnlyCollection of ModuleViewModel, I want to retrieve with linq a specific ModuleViewModel containing in my collection. Here the declaration of my collection :