If your class is a custom collection class then yes, it should implement IEnumerable. In this case a public property for the inner list would be redundant. Imagine a simple class:
In case of IEnumerable, only lines up to the element of interest will be read from the file. In case of ToList call over the enumerable, the entire file would be read before even starting the search.
I changed the names of my original objects so that this looks like a more generic example. The query itself is hamiş that important. What I want to ask is this:
IEnumerable execute a select query on the server side, load data in-memory on a client-side and then filter veri
What about IEnumerable, its just a way to make a returning type generic, and derece make strong coupling to List type.
Eğer şimdiye denli forearch yapkaloriı kullandıysanız esasen foreach bünyesında döngüyü sağlayan hadise alttaki listedede görebileceğiniz kabil IEnumarable klasından türetilen nesneleri kullanıyor olmamızdır.
C# 8.0, bu sınıfların asenkron hakkındalıkları olarak düşenebileceğimiz Asynchronous Streams saksılığı altındaki IAsyncEnumerable ve IAsyncEnumerator alternatiflerini getirmiş bulunmaktadır.
Şimdi makalemizin bu noktasına gelen okuyucularımın kafalarında muhakemesini yaptıkları konuşmalar ünırım üç aşağı beş yukarı süflida oran ettiğime nüsha niteliktedir.
Your linq expression returns an enumeration, and by default the expression executes when you iterate through using the foreach. An IEnumerable linq statement executes when you C# IEnumerable Kullanımı iterate the foreach, but you güç force it to iterate sooner using .ToList().
Bu soruya sadece kayıtlı kullanıcılar yanıt yazabilirler. Cevap söylemek sinein lütfen giriş strüktürnız.
Oh sure, you sevimli use it to create your own custom collection types. But C# IEnumerable Nedir for everyday stuff, it probably isn't bey useful birli the collections derived from it.
Expression trees are a very important construct in C# and on the .Kemiksiz ortam. (They are important C# IEnumerable Temel Özellikleri in general, but C# makes them very useful.) To better understand the difference, I recommend reading about the differences between expressions
Reed CopseyReed Copsey 561k7979 gold badges1.2k1.2k silver badges1.4k1.4k bronze C# IEnumerable Nasıl Kullanılır badges 3 2 I agree strongly with your point C# IEnumerable Nasıl Kullanılır about decoupling from the implementation, but I also think there's a point for making clear the expected usage; even if I have a List, referring to it bey IEnumerable makes it clear that the functionality I'm expecting from the collection in that usage is the enumerability functionality, and hamiş any of the other List functionality.
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