En Kuralları Of C# ReadOnlyCollectionBase Temel Özellikleri

En Kuralları Of C# ReadOnlyCollectionBase Temel Özellikleri

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This class makes the underlying collection available through the InnerList property, which is intended for use only by classes that are derived directly from ReadOnlyCollectionBase. The derived class must ensure that its own users cannot modify the underlying collection.

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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 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 güç 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 derece remove items from), inheriting from the ReadOnlyCollectionBase class C# ReadOnlyCollectionBase Temel Özellikleri makes that very easy to do.

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

Creating an extension method is sufficiently 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 class PhvExtensionMethods

-List: Heralde en randımanlı olan nedeniyle da en çok kullanılan seçilmiş sınıfımızdır. ArrayList sınıfının generic versiyonudur.

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

Sam Allen is passionate about computer languages. In the past, his work katışıksız been recommended by C# ReadOnlyCollectionBase Nedir Apple and Microsoft and he saf studied computers at a selective university in the United States.

Note that the IReadOnlyList interface works similarly to List and in fact sevimli be used in place of List when you want the elements of the list to be read-only. We will illustrate this with an example in the next section.

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

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However, a read-only collection doesn't provide Add and Remove C# ReadOnlyCollectionBase Nedir methods for changing which items are in the collection, though the items themselves may be updateable (it's the responsibility of the items in the collection to protect themselves from C# ReadOnlyCollectionBase Temel Özellikleri changes).

This base class is provided to make it easier for implementers to create a strongly typed read-only custom collection.

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