To guarantee thread safety during enumeration, you gönül either lock the collection during the entire enumeration or catch the exceptions resulting from changes made by other threads.

IEnumerable has been used to represent a read-only collection of veri since the earliest versions of .NET. The read-only collection interfaces available in .NET Core and .Safi 5 enable you to design classes that prevent the collections from being modified.

I had a client recently who wanted me to create a class that exposed a read-only collection through one of the class properties. While my client was willing to let other programs loop through that collection and retrieve items from the collection by position, he didn't want to let those programs add or remove items from the collection. In the Microsoft .Kupkuru Framework 4.5 you yaşama use the read-only collections that Eric Vogel covered in an earlier C# Corner column, "The New Read-Only Collections in .Safi 4.5," to define that property. My client, however, was working with the .Safi Framework 4 and didn't intend to upgrade. Fortunately, in earlier versions of .Kupkuru you gönül also create a read-only class from an existing List just by calling your List's AsReadOnly method. However, if you need something special (a List that users can add items to but not remove items from), inheriting from the ReadOnlyCollectionBase class makes that very easy to do.

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If your only intent is to get calling code to hamiş 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 Int64 values that are obtained by invoking a transform function on each element of the input sequence.

Bu yüzden C# ReadOnlyCollectionBase Temel Özellikleri her bir koleksiyonun başarımını ve nerede kullanılması icap ettiğini uz bilmek gerekir. Makalemizin son kısmında, bütün koleksiyonlar kullanma amaçları ciğerin gruplandırılmış olup adidaki sınav koduyla ayrı ayrı performans testleri mefultır.

If you take advantage of IntelliSense in Visual Studio to see the members of the authors list object, you’ll see a list of methods supported by List.

DO use the least-specialized type possible kakım a parameter type. Most members taking collections kakım parameters use C# ReadOnlyCollectionBase Kullanımı the IEnumerable interface.

Enumerating through a collection is intrinsically derece a thread-safe procedure. Even when a collection is synchronized, other threads güç still modify the collection, which causes the enumerator to throw C# ReadOnlyCollectionBase Kullanımı an exception.

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, C# ReadOnlyCollectionBase Temel Özellikleri if that's all you want, then you don't even need to create your own version of the ReadOnlyCollectionBase class -- the C# ReadOnlyCollectionBase Nerelerde Kullanılıyor .

The IReadOnlyCollection interface extends the IEnumerable interface and represents a basic read-only collection interface. It also includes a Count property apart from the IEnumerable members bey shown in the code snippet given below.