Detaylar, Kurgu ve C# ReadOnlyCollectionBase Nerelerde Kullanılıyor

Detaylar, Kurgu ve C# ReadOnlyCollectionBase Nerelerde Kullanılıyor

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I'm going to start by being perverse and pretending that the ReadOnlyCollectionBase class doesn't exist. If that were true and you wanted to create a read-only collection, you'd create a class that only returned an Enumerator object. A class that just implements IEnumerable is, according to my definitions, a read-only collection class. Generating that GetEnumerator object from your class isn't difficult if you keep your class data in a class that itself implements IEnumerable -- a List, for instance. If you do keep your veri in a List, then you kişi use the List GetEnumerator method to retrieve an Enumerator object, which you birey then return to the izlence using your class. Listing 1 özgü the basics of this class (I've called it PhvReadOnlyList).

Sum(IEnumerable, Func) Computes the sum of the sequence of nullable Int64 values that are obtained by invoking a transform function on each element of the input sequence.

Antrparantez, yazılı sınavmınızın performansını artırmak dâhilin metotları optimize edebilir ve kodun daha hızlı çhileışmasını sağlamlayabilirsiniz.

Equals metodunda, Point3D sınıfının X, Y ve Z bileğerlerinin özge radde ile aynı olup olmadığı denetleme edilir. GetHashCode metodunda ise nesnenin hash kodu oluşturularak yapısal müsavat karşıtlaştırmalarında kullanılır.

Now when you use IntelliSense to inspect IReadOnlyList, you’ll no longer see Add among the supported methods. Figure 2 below displays the members of the IReadOnlyList instance.

As per the comments below, you emanet prevent the possibility of downcasting by making IWriteableMyItem and WriteableMyItem private or internal. However note that this could still be circumvented via reflection - but we are protecting against accidents rather than fraud.

1. The reason for derece choosing ReadOnlyCollectionBase is simple - it isn't generic, while the aim of ReadOnlyCollection is to be generic. Thus it needs a much different inheritance tree.

Collaborate with us on GitHub The source for this content kişi be found on GitHub, where you gönül also create and C# ReadOnlyCollectionBase Nerelerde Kullanılıyor review issues and pull requests. For more information, see our contributor guide.

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, C# ReadOnlyCollectionBase Kullanımı you dirilik skip to 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 .NET and the compiler work together; how creating generic classes gives you flexibility; how you hayat exploit one of the built-in .NET interfaces; and (finally) how to simplify ugly syntax by building your own extension methods. I also think that you don't really understand anything unless you can see a way to write it yourself, and this topic lets me do that, too, by C# ReadOnlyCollectionBase Nerelerde Kullanılıyor showing how you hayat create the .Kemiksiz ReadOnlyCollectionBase class. So this column is kakım much about providing insight into how .Kemiksiz works birli it is about doing something practical. Foundation Knowledge

A ReadOnlyCollectionBase instance is always read-only. See CollectionBase for a modifiable version of this class.

Public static (Shared in Visual Basic) members of this type are thread safe. Any instance members are derece guaranteed to be thread safe.

Average(IEnumerable, Func) Computes the average of a sequence of nullable Int64 values that are obtained by invoking a transform function on each element of the input sequence.

ObservableCollection birey bind to ListViewCollection in such a way that changes to ListViewCollection do hamiş get pushed back into ObservableCollection. The C# ReadOnlyCollectionBase Nasıl Kullanılır original ReadOnlyObservableCollection, however, throws an exception if you try to modify the collection.

Collaborate with us on GitHub The source for this content kişi be found on GitHub, where you güç also create and C# ReadOnlyCollectionBase Nasıl Kullanılır review issues and pull requests. For more information, see our contributor guide.