With this type from System.Collections.ObjectModel, we provide a collection of elements that cannot be changed. But it may be possible to change some elements themselves.
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?
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A collection that is read-only is simply a collection with a wrapper that prevents modifying the collection; therefore, if changes are made to the underlying collection, the read-only collection reflects those changes.
Average(IEnumerable, Func) Computes the average of a sequence of Double values that are obtained by invoking a transform function on each element of the C# ReadOnlyCollectionBase Kullanımı input sequence.
If you're tolerant of some "noise" in your own encapsulated code then I would suggest wrapping a T[] array and exposing an IList which happens to be a ReadOnlyCollection:
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Sum(IEnumerable, Func) Computes the sum of the sequence of nullable Double values that are obtained by invoking a transform function on each element of the input sequence.
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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 you C# ReadOnlyCollectionBase Temel Özellikleri specify, automatically appearing in the IntelliSense dropdown lists for those objects; second, they're automatically passed whatever object they're called from birli their first parameter; third, when an extension method is used with a generic class (for instance, List), the method C# ReadOnlyCollectionBase Nasıl Kullanılır 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.
Anlaşılabilirlik ve Kullanım Kolaylığı: C# Queue'un gösterişsiz ve C# ReadOnlyCollectionBase Nerelerde Kullanılıyor anlaşılabilir gestaltsı, geliştiricilerin muhtelitşık fiillemleri yönetmesini kolaylaştırır.
A C# ReadOnlyCollectionBase Temel Özellikleri method like PayUnpaidInvoices being present may lead to second guessings about what "regular" collection methods like Remove and Clear might do. Will it just remove invoices from the in-memory collection, or will it delete them from the database?