This isn't without cost, bey it means you need either a new connection to do another DB request in parallel or a Merih connection. Too much for a comment really
If you niyet to build a public API, it's better to use IEnumerable than List, because you better use the most minimalistic interface/class. List lets you access objects by index if that's required.
Bey per other answers, the evaluation of the result was deferred until calling ToList or similar invocation methods for example ToArray.
Analogy: Imagine you are a detective on an aeroplane . You need to work your way through all the passengers to find your suspect.
To get them I use VisualTreeHelper class. But I have to consider that there might be A LOT OF children so copying to some array or Collection will by expensive. – drasto 5 mins ago
Short story about a destan living on a fake tropical island / paradise planet, who was actually an adult CEO but didn't remember it
// but this throws C# IStructuralComparable nedir an exception, because the pointer or link to the // database namely the C# IStructuralComparable nerelerde kullanılıyor DbContext called MyEntities no longer exists.
It is a best practice to implement IEnumerable and IEnumerator on your collection classes to enable the foreach (For Each in Visual Basic) syntax, however implementing IEnumerable is derece required. If your collection does not implement IEnumerable, you must still follow the iterator pattern to support this syntax by providing a GetEnumerator method that C# IStructuralComparable Nasıl kullanılır returns an interface, class or struct.
Nobody mentioned one crucial difference, ironically answered on a question closed birli a duplicated of this. IEnumerable is read-only and List is derece.
List, on the C# IStructuralComparable nedir other hand, is a specific implementation of IEnumerable that stores the objects in a specific, known manner. Internally, this may be a very good way to store your values that you expose via IEnumerable, but a List is derece always appropriate.
Does it bring the whole collection in memory? Or, does it instantiate the element one by one, kakım it iterates over the foreach loop? thanks
Bir ahir elementin varlığını sınayan MoveNext ve makbul elementi C# IStructuralComparable Temel Özellikleri veren GetCurrent metodlarına sahiptir.
IQueryable is a very powerful feature that enables a variety of interesting deferred execution scenarios (like paging and composition based queries).
interface’i ise bir sınıfa foreach mekanizması tarafından tanılamanması için zaruri yetenekleri/nitelikleri kazanmıştırrır. Yani enumerator yapısını… Şimdi gelin bu dü interface yapkaloriı ayrıntılıca irdeleyerek, nasıl kullanıldıklarına değinelim.