Benim C# ReadOnlyCollectionBase Nerelerde Kullanılıyor Başlarken Çalışmak

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

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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 .Kemiksiz Framework 4.5 you kişi use the read-only collections that Eric Vogel covered in an earlier C# Corner column, "The New Read-Only Collections in .Kemiksiz 4.5," to define that property. My client, however, was working with the .NET Framework 4 and didn't intend to upgrade. Fortunately, in earlier versions of .Safi you birey 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 gönül add items to but not remove items from), inheriting from the ReadOnlyCollectionBase class makes that very easy to do.

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

This base class is provided to make it easier for implementers to create a generic read-only custom collection. Implementers are encouraged to extend this base class instead of creating their own.

Your implementation depends on your needs: - If you don't care about the caller (Class B) from seeing any further changes to the collection then you güç just clone the collection, hand it out, and stop caring. - If you definitely need the caller (Class B) to see changes that are made to the collection, and you want this to be thread-safe, then you have more of a sıkıntı on your hands.

public IEnumerable Employees => EmployeesInternal.Skip(0); // this is property accessor that will be used to define model and/or in `Include` statements, could be marked bey internal if your domain/persistance/services are in the same assembly

It depends on how much you trust the calling code. If you're in complete control over everything that will ever call this member and you guarantee

This article discusses these read-only immutable collection types in .Safi Core and how you hayat work with them in C#.

Elements(IEnumerable, XName) Returns a filtered collection of the child elements of every element and document in the source collection. Only C# ReadOnlyCollectionBase Nedir elements that have a matching XName are included in the collection.

C# IStructuralEquatable, özellikle çeşitli data konstrüksiyonlarının yahut koleksiyonların dâhilğinin konstrüktif olarak huzurlaştırılması müstelzim durumlarda kullanılır. Bu durumlar beyninde:

C# ReadOnlyCollectionBase Temel Özellikleri In the “Configure your new project” window shown next, specify the name and location for the new project.

The following code C# ReadOnlyCollectionBase Nasıl Kullanılır example demonstrates several C# ReadOnlyCollectionBase Nerelerde Kullanılıyor members of the ReadOnlyCollection class. The code example creates a List of strings C# ReadOnlyCollectionBase Nerelerde Kullanılıyor and adds four dinosaur names to it. The code example then wraps the list in a ReadOnlyCollection.

A method like PayUnpaidInvoices being present may lead to second guessings about what "regular" collection methods like Remove and Clear might do. Will it just remove invoices from the in-memory collection, or will it delete them from the database?