Greatest Kılavuzu C# ReadOnlyCollectionBase Nasıl Kullanılır için

Greatest Kılavuzu C# ReadOnlyCollectionBase Nasıl Kullanılır için

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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.

Define your own class which implements IEnumerator, takes an IList in the new constructor, başmaklık a read only default item property taking an index, and does hamiş include any properties/methods that could otherwise allow your list to me manipulated.

Example. In this program, a list of ints is created, and then the ReadOnlyCollection constructor is used with that List birli an argument. Inside the ReadOnlyCollection constructor, a reference to the argument is stored kakım an IList reference field.

Elements(IEnumerable) Returns a collection of the child elements of every element and document in the source collection.

Imagine we have existing prototip with Organization => Employees already takım up. To apply this technique, we need to change Organization manken a bit:

You birey expose private collection properties to EF, allowing for mapping and querying, while still keeping your domain object's members and relationships properly encapsulated. It's a bit messy, but it works:

Istifham 1: C# Metot nedir? C# Metot, mukannen bir işlevi alegori getiren kod bloklarını bâtınermiş bünyelardır. Metotlar, kodun tekrar kullanılabilirliğini pozitifrır ve harf karmaşıklığını azaltır.

After hopefully understanding your question, i think you have to distinguish between what you create and manage within your class and what you make available to the outside world.

Public static (Shared in Visual Basic) members of this type are thread safe. Any instance members are derece guaranteed to be thread safe.

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

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

This answer already assumes you want to return IEnumerable without any reasoning to support that decision.

ObservableCollection can bind to ListViewCollection in such a way that changes to ListViewCollection do hamiş get pushed back into ObservableCollection. The original ReadOnlyObservableCollection, however, throws an exception if you try to modify the collection.

Initializes a new instance of the ReadOnlyCollection class that is a read-only wrapper around the specified list.