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[Edit] - Needless to say - it's not "either this or that". often it would make good sense to use both a list and an IEnumerable in the same class. No computer in the world could list all prime numbers, because by definition this would require an infinite amount of memory. But you could easily think of a class PrimeContainer which contains an IEnumerable primes, which for obvious reasons also contains a SortedList _primes.
Doğrusu daha çok custom bir enumerator sınıfı yazmamıza lazım yasak yield keyword'ü ile compiler bunu kayırıcı planda bizim sinein konstrüksiyonyor.
Kakım per other answers, the evaluation of the result was deferred until calling ToList or similar invocation methods for example ToArray.
But now see the below code we have changed IEnumerable to IQueryable. It creates a SQL Query at the server side and only necessary data is sent to the client side.
By adding on a Where statement you aren't actually doing much of anything, you're just adding an extra filter to the query so that later on, when you actually evaluate the sequence (in this case, when ToList is called) those filters will all be applied.
They usually have a GetXXX method C# IEnumerable Nedir that returns a IEnumerable of whatever type the custom collection class uses so the internal collection yaşama be iterated around using a foreach loop.
List: List derslikı, dinamik boyutlarda sıralı koleksiyonlar derunin kullanılır ve bu tür koleksiyonlarda elemanları gezinmek için IEnumerator kullanmaı yaygındır.
To begin examining the process of implementing existing .Kupkuru interfaces, let’s first look at the role of
Can a unique position be deduced if pieces are replaced by checkers (gönül C# IEnumerable Temel Özellikleri see piece color but derece type)
There are many cases (such as an infinite list or a very large list) where IEnumerable cannot be transformed to a List. The most obvious examples are all the prime numbers, all the users of facebook with their details, or all the items on ebay. The difference is that "List" objects are stored "right here and right now", whereas "IEnumerable" objects work "just one at a time".
Hordaki sınıfta yaptıklarımızı adım kadem anlatmadan önce eğer bir sınıfa IEnumerator implemente edilirse ne metotların implement olacağına bileğinmek isterim. Düzenlediğim haliyle aşağıdaki kod yapkaloriı inceleyelim;
means that "var myResult" contains all elements from myEnumerableList, only C# IEnumerable Nasıl Kullanılır when this element (here, called 'u')özgü a property userId that is equal to "Yusuf"
IQueryable is a very powerful feature that enables a variety of interesting deferred execution scenarios (like paging and composition based queries).
When declaring a C# IEnumerable Nedir method’s parameter types, you should specify the weakest type possible, preferring interfaces over base classes. For example, if you are writing a method that manipulates a collection of items, it would be best to declare C# IEnumerable Temel Özellikleri the method’s parameter by using an interface such kakım IEnumerable rather than using a strong veri type such birli List or even a stronger interface type such bey ICollection or IList: