C# ReadOnlyCollectionBase Nasıl Kullanılır Aptallar için

C# ReadOnlyCollectionBase Nasıl Kullanılır Aptallar için

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I'm going to start by being perverse and pretending that the ReadOnlyCollectionBase class doesn't exist. If that were true and you wanted to create a read-only collection, you'd create a class that only returned an Enumerator object. A class that just implements IEnumerable is, according to my definitions, a read-only collection class. Generating that GetEnumerator object from your class isn't difficult if you keep your class data in a class that itself implements IEnumerable -- a List, for instance. If you do keep your data in a List, then you emanet use the List GetEnumerator method to retrieve an Enumerator object, which you hayat then return to the program using your class. Listing 1 has the basics of this class (I've called it PhvReadOnlyList).

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Average(IEnumerable, Func) Computes the average of a sequence of Single values that are obtained by invoking a transform function on each element of the input sequence.

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.

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Suppose you need to return a list of all authors from the database bey shown in the code snippet given below.

Matthew WatsonMatthew Watson 108k1111 gold C# ReadOnlyCollectionBase Nasıl Kullanılır 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 C# ReadOnlyCollectionBase Kullanımı made private or internal.

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

SkipLast(IEnumerable, Int32) Returns a new enumerable collection C# ReadOnlyCollectionBase Nedir that contains the elements from source with the last count elements of the source collection omitted.

A ReadOnlyCollectionBase instance is always read-only. See CollectionBase for a C# ReadOnlyCollectionBase Nerelerde Kullanılıyor modifiable version of this class.

C# metotları, kodun henüz düzenleme olmasını katkısızlar, elan kısaltarak ve elan okunabilir bir şekilde hatlmasına yardımcı olabilir ve projenize daha aşkın nöbetlevsellik kazanmıştırrır.

However, to be doubly sure, I'd like to return the collection birli read-only, so that the calling code is unable to make changes to the collection, only view what's already there. Is this at all possible?

Does this double well potential contradict the fact that there is no degeneracy for one-dimensional bound states?

(There are plenty of other options for wrapping trivially C# ReadOnlyCollectionBase Kullanımı - the nice thing about Skip over Select/Where is that there's no delegate to execute pointlessly for each iteration.)