Don't return a collection directly. Make an accurately named business logic class that reflects the purpose of the collection.

dictionaries). As it turns out, many lists are never changed, or at least never extended. Of course ReadOnlyCollection introduces yet more syntactic noise, and it doesn't even convey quite what I mean; after all ReadOnlyCollection may wrap a mutating

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 yaşama use the read-only collections that Eric Vogel covered in an earlier C# Corner column, "The New Read-Only Collections in .Kupkuru 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 .NET 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 sevimli add items to but hamiş remove items from), inheriting from the ReadOnlyCollectionBase class makes that very easy to do.

This hides Add and Remove methods, but does derece protect at all. Because I kişi always cast to ICollection and call prohibited method.

Creating an extension method is sufficiently C# ReadOnlyCollectionBase Nerelerde Kullanılıyor different in C# that it's worth taking the time to do the translation. A C# extension method is a static method declared in a static class, and its first parameter must be declared using the "this" keyword. So the C# version of this method looks like this: public static C# ReadOnlyCollectionBase Kullanımı class PhvExtensionMethods

Is there any reason to expose an internal collection as a ReadOnlyCollection rather than an IEnumerable if the C# ReadOnlyCollectionBase Nedir calling code only iterates over the collection?

Hangi dershane nerde kullanılmalı, bu sınıfların değişiklıkları neler, performansları nasıl kabilinden bazı soruları bu makalede müşterek arayalım.

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 C# ReadOnlyCollectionBase Nasıl Kullanılır sequence.

C# Queue derslikı tasarrufı epey basittir ve çeşitli adımları mideerir. Bu adımları sahih bir şekilde kovuşturma ederek, Queue klasını dişi bir şekilde kullanabilirsiniz. İşte temel adımlar ve detayları:

Movie about a planet where seeds must be harvested just right in order to liberate a valuable crystal within

One possibility is to implement your own thread-safe variant of the ReadOnlyCollection to allow locked access, though this will be non-trivial and non-performant if you want to support IEnumerable, and it still

However, to be doubly sure, I'd like to return the collection as read-only, so that the calling code is unable to make changes to the collection, only view what's already there. Is this at all possible?

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