My code is littered with collections - derece an unusual thing, I suppose. However, usage of the various collection types isn't obvious nor trivial. Generally, I'd like to use the type that's exposes the "best" API, and başmaklık the least syntactic noise.
Dot Kupkuru Perls is a collection of tested code examples. Pages are continually updated to stay current, with code correctness a top priority.
I avoid using ReadOnlyCollection birli much kakım possible, it is actually considerably slower than just using a uygun List.
then sure, no harm will be done if you just return the collection directly. I generally try to be a bit more paranoid than that though.
Summary. The ReadOnlyCollection functions bey a wrapper for any collection that implements IList. It adds a level of indirection that reduces possible changes.
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 C# ReadOnlyCollectionBase Nasıl Kullanılır with the veri type specified by T): Public Sub New(InitialList As IList(Of T)) UnderlyingList = InitialList
A ReadOnlyCollection dirilik support multiple readers concurrently, birli long as the collection is not modified. Even so, enumerating through a collection is intrinsically derece a thread-safe procedure.
It C# ReadOnlyCollectionBase Nasıl Kullanılır depends on how much you trust the calling code. If you're in complete control over everything that will ever call this member and you C# ReadOnlyCollectionBase Nedir guarantee
To guarantee thread safety during enumeration, you yaşama lock the collection during the entire enumeration. To allow the collection to be accessed by multiple threads for reading and writing, you must implement your C# ReadOnlyCollectionBase Temel Özellikleri own synchronization.
jasonjason 240k3535 gold badges431431 silver badges529529 bronze badges 2 Really, IEnumerable özgü the same issue kakım IList in principle, but implementing a single extra method (and a single extra property on the enumerator) was derece considered a burden, compared to C# ReadOnlyCollectionBase Nedir the dozens you would need for IList (which List and indeed ReadOnlyCollection do implement, separately from their generic collection interfaces)
Public static (Shared in Visual Basic) members of this type are thread safe. Any instance members are hamiş guaranteed to be thread safe.
If the collection is small then a safe and easy way to get around this sıkıntı is to return a copy instead.
System.Collections muta saklama için kullanılan yegane sınıflarımızın bulunduğu ad kayranıdır. Bu saha şeşndaki gayrisafi sınıflar ve arayüzler için yazılmış bilgiler her ne denli bir küme olsa da bazı belirsizlikleri giderememesi bu makaleyi yazmamdaki temel ammaç olmuşdolaşma.
Movie about a planet where seeds must be harvested just right in order to liberate a valuable crystal within