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.

Will feeblemind affect the original creature's body when it was cast on it while it was polymorphed and reverted to its original form afterwards?

I ran a security code analyst i found myself having a CA2105 warning. I looked at the grade tampering example. I didn't realize you sevimli assign int[] to a readonly int. I thought readonly was like the C++ const and makes it illegal.

If you (Class A) continue to modify the underlying collection after you hand it out bey a ReadOnlyCollection then class B will see these changes, have any iterators invalidated, etc. and generally be open to any of the usual concurrency issues with collections.

Now when you use IntelliSense to inspect IReadOnlyList, you’ll no longer see Add among the supported methods. Figure 2 below displays the members of the IReadOnlyList instance.

Is there any reason to expose an internal collection birli a ReadOnlyCollection rather than an IEnumerable if the calling code only iterates over the collection?

Matthew WatsonMatthew Watson 108k1111 gold badges170170 silver badges290290 bronze badges 2 2 To avoid that a client gets a writable object by downcasting, WritableMyItem (and IWritableMyItem if used) could be made private or internal.

ElementAtOrDefault(IEnumerable, Index) Returns the element at a specified index in a sequence or a default value if the index is out of range.

Dan TaoDan Tao 128k5656 gold badges308308 silver badges448448 bronze badges 4 I'd like C# ReadOnlyCollectionBase Kullanımı to avoid noise in both callee and caller. Exposing a ReadOnlyCollection bey anything other than itself isn't necessary: after all, exposing it kakım an IList just gets confusing (where'd I get this IList from - hayat I modify it?), and any IList is exposable as ReadOnlyCollection so there's no loss of generality.

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ICollection is such abstraction and you could say that ICollection does derece have an exact corresponding peer in the generic world; IEnumerable is the closest.

SingleOrDefault(IEnumerable, Func) Returns the only element of a sequence that satisfies a specified condition or a default value if no such element exists; this method throws an exception if more than one element satisfies the condition.

For maximum flexibility, my class doesn't specify the data type of the List in which it keeps its actual data. Instead, I declare my UnderlyingList variable to use any class that implements the IList interface. I've also C# ReadOnlyCollectionBase Nedir made this a generic class: Rather than specify what kind of List I'm working with, I've forced my class to be instantiated with a veri type that the code refers to bey T. Wherever in my code I need to specify C# ReadOnlyCollectionBase Nedir my List's veri type, I just use the T reference. Finally, I've chosen to have this class implement the generic version of IEnumerable, which requires two versions of the GetEnumerator method -- but the code is identical in both versions of C# ReadOnlyCollectionBase Nerelerde Kullanılıyor the method. Listing 1. The basics of the PhvReadOnlyList class.

Chances are, you'll never notice this difference, but if this is a hot-tanıtımcık in your code and requires every last bit C# ReadOnlyCollectionBase Nedir of performance you sevimli squeeze out of it, why derece use an Array instead? That would be faster still.