C# ReadOnlyCollectionBase Nerelerde Kullanılıyor Herkes İçin Eğlenceli Olabilir

C# ReadOnlyCollectionBase Nerelerde Kullanılıyor Herkes İçin Eğlenceli Olabilir

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You yaşama argue that you may be able to downcast IPerson to Person, but at this point I would answer telling you that you need to follow your own coding conventions: if you defined that you never return Person but IPerson then I would do it this way in the entire code base, and if you need a write-capable Parents property, then you return Person instead (and you avoid a cast later!).

In programs, an immutable collection kişi be used with less copying—we do hamiş need to worry about it being modified. This gönül make programs simpler and easier to reason about.

Example. In this program, a list of ints is created, and then the ReadOnlyCollection constructor is used with that List kakım an argument. Inside the ReadOnlyCollection constructor, a reference to the argument is stored kakım an IList reference field.

C# IStructuralEquatable arabirimi, koleksiyonların strüktürel eşitliğini tanımlamak yürekin kullanılır. İki nesnenin gönülğinin aynı olup olmadığını sınırlamak ve bu nesnelerin karşılaştırılabilirliğini getirmek derunin önemli yöntemler sunar.

The main advantage of this comes in the fact that you dirilik't add code to collections so whenever you have a native "collection" in your object mostra, you ALWAYS have non-OO support code spread throughout your project to access it.

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.

On the other hand, if you're exposing a read-only view of a mutable collection, then this advice is still valid, although I would probably expose it birli IReadOnlyCollection (which didn't exist when I wrote this).

ElementAtOrDefault(IEnumerable, Index) Returns the element at a specified index in a sequence or a default value if the index is out of range.

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, 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 sevimli exploit one of the built-in .Kemiksiz interfaces; and (finally) how to simplify ugly syntax by building your C# ReadOnlyCollectionBase Nedir own extension methods. I also think that you don't really understand anything unless you kişi see a way to write it yourself, and this topic lets me do that, too, by showing how you yaşama create the .Safi ReadOnlyCollectionBase class. So this column is kakım much about providing insight into how .NET works as it is about doing something practical. Foundation Knowledge

Performans Optimizasyonu: IList, done erişimini optimize ederek uygulamanın performansını zaitrabilir ve hafıza yönetimini iyileştirebilir.

One might hamiş realize that the collection C# ReadOnlyCollectionBase Nasıl Kullanılır is read-only but the variable pointing to it is hamiş. What a ReadOnlyCollection would mean if I sevimli reassign the variable itself to a new collection altogether. +1.

SingleOrDefault(IEnumerable, Func) Returns the only C# ReadOnlyCollectionBase Nerelerde Kullanılıyor element of a sequence that satisfies a specified condition or a default value C# ReadOnlyCollectionBase Nedir if no such element exists; this method throws an exception if more than one element satisfies the condition.

-HashTable ve Sorted List: Bu iki klasın çdüzenışma prensipleri birbirine çok yakındır. Bir bölgede iki pare data barındırırlar. C# ReadOnlyCollectionBase Nasıl Kullanılır Bunlar ‘Key’ ve ‘Value’dur. Verdiğimiz ‘Key’ değeri unique tutulmak ve null olmamak zorundadır. HashTable ve SortedList, verilere ulaşırken barındırdıkları unique anahtarları kullanarak ulaşırlar. Böylece aldıkları verilere bir nevi Identity kolonuna rabıtalamış olurlar. Key değerleri atandıktan sonra asla değmeselemez.

If however your intent is to prevent the calling code from observing updates from other threads you'll have to fall back to solutions already mentioned, to perform a deep or shallow copy depending on your need.