C# ReadOnlyCollectionBase Kullanımı Ile ilgili detaylı notlar

C# ReadOnlyCollectionBase Kullanımı Ile ilgili detaylı notlar

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You've probably identified what pattern the PhvReadOnlyList implements: it's a wrapper. In the .Kemiksiz Framework 4.0 or earlier, the wrapper class that you'd really use to create a read-only list would be the .NET ReadOnlyCollectionBase class. Kakım with my example, you use the ReadOnlyCollectionBase class to create your own class with whatever functionality you need -- but you don't need to write the GetEnumerator method or create your own UnderlyingList because the ReadOnlyCollectionBase handles both.

I agree. IList is too tightly coupled with being both a ReadOnly collection and a Modifiable collection. IList should have inherited from an IReadOnlyList.

I was thinking about creating a new class derived from ReadOnlyCollection (class ReadOnlyMyCollection : ReadOnlyCollection or class ReadOnlyMyCollection : ReadOnlyCollection) which returns the read-only wrapper class (ReadOnlyMyItem) through the square brackets operator, but either the square brackets operator is derece marked as virtual and the return type is derece even the same or the constructor doesn't have an IList of the wrapper class (IList) to use. Should I build the class (ReadOnlyMyCollection) from scratch?

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

Well, there is a way. It ain't pretty birli it adds extra stuff on your domain sistem, but I just checked and it C# ReadOnlyCollectionBase Kullanımı works.

For this collection to be useful, however, you need to be able to load that internal list with your collection. The easiest way to do that is to add a constructor to the class that accepts the List to be put in the class' UnderlyingList collection (again, I'm accepting anything that implements the IList interface with the veri type specified by T): Public Sub New(InitialList As IList(Of T)) UnderlyingList = InitialList

A ReadOnlyCollection gönül support multiple readers concurrently, birli long bey the C# ReadOnlyCollectionBase Nerelerde Kullanılıyor collection is not modified. Even so, enumerating through a collection is intrinsically derece a thread-safe procedure.

protected virtual ICollection EmployeesInternal get; private grup; = new List(); // this will expose collection C# ReadOnlyCollectionBase Temel Özellikleri contents to public, seemingly unneccessary `Skip` statement will prevent casting back to Collection

Any idea why IList doesn't inherit from ICollection? C# ReadOnlyCollectionBase Nerelerde Kullanılıyor Since the latter is basically IEnumerable plus Count, and since IList already özgü a Count method, having IList inherit ICollection C# ReadOnlyCollectionBase Temel Özellikleri wouldn't have required any more work for implementers, but would have allowed someone with an IList to know how many items to expect from an enumeration.

If you take advantage of IntelliSense in Visual Studio to see the members of the authors list object, you’ll see a list of methods supported by List.

This gönül be a sıkıntı when your class saf some invariants (guarantees about what it does and the veri it holds) kakım it cannot make guaranteed if other classes birey change its internals willy nilly.

However, a read-only collection doesn't provide Add and Remove 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 changes).

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

I don't know if there is any way of protecting non-atomic elements without cloning them before placing them in the read only list. Share Improve this answer Follow