En iyi Tarafı C# ReadOnlyCollectionBase Kullanımı
En iyi Tarafı C# ReadOnlyCollectionBase Kullanımı
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My code is littered with collections - derece an unusual thing, I suppose. However, usage of the various collection types isn't obvious nor trivial. Generally, I'd like to use the type that's exposes the "best" API, and has the least syntactic noise.
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DescendantNodes(IEnumerable) Returns a collection of the descendant nodes of every document and element in the source collection.
This hides Add and Remove methods, but does not protect at all. Because I kişi always cast to ICollection and call prohibited method.
The IReadOnlyDictionary interface provides a read-only view of a dictionary and represents a read-only collection of key/value pairs. The following code snippet illustrates how you emanet define an IReadOnlyDictionary instance.
Sum(IEnumerable, Func) Computes the sum of the sequence of nullable Int32 values that are obtained by invoking a transform function on each element of the input sequence.
If you're tolerant of some "noise" in your own encapsulated code then I would suggest wrapping a T[] array and exposing an C# ReadOnlyCollectionBase Nasıl Kullanılır IList which happens to be a ReadOnlyCollection:
protected virtual ICollection EmployeesInternal get; private takım; = new List(); // this will expose collection contents to public, seemingly unneccessary `Skip` statement will prevent casting back to Collection
Does this double well potential contradict the C# ReadOnlyCollectionBase Nedir fact that there is no degeneracy for one-dimensional bound states?
If you do this then there's nothing stopping your callers casting the IEnumerable back to ICollection and then modifying it. ReadOnlyCollection removes this possibility, although it's still possible to C# ReadOnlyCollectionBase Temel Özellikleri access C# ReadOnlyCollectionBase Kullanımı the underlying writable collection via reflection.
ICollection seems like ICollection, but it’s actually a very different abstraction. We found that ICollection was derece very useful. C# ReadOnlyCollectionBase Nerelerde Kullanılıyor At the same time, we did hamiş have an abstraction that represented an read/write non-indexed collection.
Here’s where you emanet take advantage of IReadOnlyList to ensure that the returned veri cannot be changed. By changing the return type of the GetAuthors method from List to IReadOnlyList we hayat make our collection read-only.
End Sub And that's all you need to write. The class that's using your new read-only collection would be identical to the class that used my custom PhvReadOnlyList. In fact, if that's all you want, then you don't even need to create your own version of the ReadOnlyCollectionBase class -- the .
This causes unnecessary boxing/unboxing of value types. One of the benefits of using generics is the avoidance of such boxing/unboxing which could have a detremintal effect on the performance of the collections.