En C# ReadOnlyCollectionBase Nerelerde Kullanılıyor Sırları

En C# ReadOnlyCollectionBase Nerelerde Kullanılıyor Sırları

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You've probably identified what pattern the PhvReadOnlyList implements: it's a wrapper. In the .Kupkuru Framework 4.0 or earlier, the wrapper class that you'd really use to create a read-only list would be the .Kemiksiz 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.

Tip You emanet loop over the ReadOnlyCollection using the foreach-loop. A for-loop is also possible with the Count property and indexer.

Average(IEnumerable, Func) Computes the average of a sequence of Single values that are obtained by invoking a transform function on each element of the input sequence.

Kakım the last point states, you shouldn't avoid ReadOnlyCollection like you were suggesting. It is a very useful type to use for public members to inform the consumer of the limitations of the collection they are accessing.

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

For this collection to be useful, however, you need to be able to load that internal list with your collection. The easiest way to do that is to add a constructor to the class that accepts the List to be C# ReadOnlyCollectionBase Kullanımı put in the class' UnderlyingList collection (again, I'm accepting anything that implements the IList interface with the data type specified C# ReadOnlyCollectionBase Nedir by T): Public Sub New(InitialList Birli IList(Of T)) UnderlyingList = InitialList

What's the best way to pass around lists of values without lots of code clutter (such birli explicit type parameters) but that still communicates intent clearly?

instead. I just included IWritableMyItem for completeness (because it shows how you introduce a grup to an interface property that only başmaklık a get, by using new).

It's hamiş a concrete type like ReadOnlyCollection, so it doesn't tie you down to a specific implementation.

jasonjason 240k3535 gold badges431431 silver badges529529 bronze badges 2 Really, IEnumerable başmaklık the same issue birli IList in principle, but implementing a single extra method (and a single extra property on the enumerator) was derece considered a burden, compared to the dozens you would need for IList (which List and indeed ReadOnlyCollection do implement, separately from their generic C# ReadOnlyCollectionBase Nedir collection interfaces)

One possibility 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

Bu kuruluşnın faydası diziye istediğimiz türden bir nesne atabilme olanakımızdır. Her ne derece çıbanlangıç değeri, belleği fazladan kullansada boxing kârlemi örgülmadığından bu eder berenarı azalır. Array derslikı IList arayüzünden türesede Add, Remove, Sort kadar temel metodlara C# ReadOnlyCollectionBase Nedir mevla değildir. Hatta IndexOf, FindIndex gibi indeksleme metodlarını da kullanmaımıza sunmaz. Bu yüzden esnek bir dokumaya iye bileğildir. Array klası matris dokumasında kullanılan yegane sınıftır.

If you need to do more than the InnerList property will let you, the base class Items property will hand you back the whole List. As I said, creating a read-only collection class in .

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