Hakkında C# ReadOnlyCollectionBase Nedir

Hakkında C# ReadOnlyCollectionBase Nedir

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

SingleOrDefault(IEnumerable, TSource) Returns the only element of a sequence, or a specified default value if the sequence is empty; this method throws an exception if there is more than one element in the sequence.

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 .Safi Framework 4.5 you can 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 dirilik 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 hayat add items to but not remove items from), inheriting from the ReadOnlyCollectionBase class makes that very easy to do.

Bey the last point states, you shouldn't avoid ReadOnlyCollection like you were suggesting. It is a very useful type to use for public members to inform the consumer of the limitations of the collection they are accessing.

GitHub'da bizimle ortaklık bünyen Bu hapishaneğin kaynağı GitHub'da bulunabilir; burada ayrıca sorunları ve çekme isteklerini oluşturup gözden geçirebilirsiniz. Elan zait olgun derunin yardımda mevcut kılavuzumuzu inceleyin.

Note The StringBuilder references themselves are read-only, but the memory pointed to by the references are still mutable.

Koleksiyonların Strüktürel önlaştırması: IStructuralEquatable arabirimi, özellikle diziler ve koleksiyonlar gibi konstrüktif veri yapılarının zıtlaştırılması sinein kullanılır.

Average(IEnumerable, Func) Computes the average of a sequence of nullable Int32 values that are obtained by invoking a transform function on each element of the input sequence.

However, it should be noted that while these C# ReadOnlyCollectionBase Kullanımı read-only collection types provide a read-only view of the veri, they are only wrappers. They do not provide an immutable copy of the collection.

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However, the syntax is awkward. Adding an extension method yaşama simplify that syntax tremendously. Extension methods have at least three convenient features: The first is that they attach themselves to whatever classes C# ReadOnlyCollectionBase Nasıl Kullanılır you specify, automatically appearing in the IntelliSense dropdown lists for those objects; second, they're automatically passed whatever object they're called from kakım their first parameter; third, when an extension method is used C# ReadOnlyCollectionBase Temel Özellikleri with a generic class (for instance, List), the method automatically figures out the data type of the generic parameter.

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

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