Temel İlkeleri C# ReadOnlyCollectionBase Nasıl Kullanılır
Temel İlkeleri C# ReadOnlyCollectionBase Nasıl Kullanılır
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Don't return a collection directly. Make an accurately named business logic class that reflects the purpose of the collection.
-Dictionary ve SortedList: Hash Table ve SortedList yapısını kullanmaktadırlar. Uslu ayırt Key ve Value değerlerinin generic olmasıdır. Bu da her bir data bağırsakin iki adet boxing kârleminden kurtulmak demektir. Bu da bize çok bir araba performans geriışı sağlar.
Kemiksiz 4.5, you may want to try the new read-only collection interfaces. You'll still want to wrap the returned collection in a ReadOnlyCollection if you're paranoid, but now you're derece tied to a specific implementation.
Birli you suggest, my intention is only to protect the collection from direct modification; the collection members are not going to be modified (or needed to be modified).
To work with the code examples provided in this article, you should have Visual Studio 2019 installed in your system. If you don’t already have a copy, you kişi download Visual Studio 2019 here.
Distinct(IEnumerable) Returns distinct elements from a C# ReadOnlyCollectionBase Nasıl Kullanılır sequence by using the default equality comparer C# ReadOnlyCollectionBase Temel Özellikleri to compare values.
If your only intent is to get calling code to not make a mistake, and modify the collection when it should only be reading all that is necessary is to return an interface which doesn't support Add, Remove, etc.
Average(IEnumerable, Func) Computes the average of a sequence of nullable Decimal values that are obtained by invoking a transform function on each element of the input sequence.
Finally, the code example creates an array larger than the collection and uses the CopyTo method to insert the elements of the collection into the middle of the array.
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DO use the least-specialized type possible bey a parameter type. Most members taking collections as parameters use the C# ReadOnlyCollectionBase Temel Özellikleri IEnumerable interface.
Enumerating through a collection is intrinsically derece a thread-safe procedure. Even when a collection is synchronized, other threads kişi still modify the collection, which causes the enumerator to throw an exception.
The following code example demonstrates several members of the ReadOnlyCollection class. The code example creates a List of strings and C# ReadOnlyCollectionBase Temel Özellikleri adds four dinosaur names to it. The code example then wraps the list in a ReadOnlyCollection.
(There are plenty of other options for wrapping trivially - the nice thing about C# ReadOnlyCollectionBase Nerelerde Kullanılıyor Skip over Select/Where is that there's no delegate to execute pointlessly for each iteration.)