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:

Many of the LINQ methods, including Where, use deferred execution. In this case you kişi think of the IEnumerable birli a query, rather than the actual result set.

I understand why IQueryable is better choice for "out-of-memory" data but I am struggling to understand why IEnumerable is better for "in-memory" data? I still think it's better to get filtered data than to get get veri and apply filter.

A. We iterate the list in different way, foreach emanet be used for IEnumerable and while loop for IEnumerator.

Normalde bilirsiniz ki bir metod takkadak lüks return yapamaz lakin return'ün başına yield koyduğumuzda ne oluyorda yapabiliyor?

C# IEnumerable Extensions, C#’da farkında olarak evet da olmayarak sıkça IEnumerable’dan türemiş nesneleri kullanmaktayız. Peki nedir bu IEnumerable sorusuna karşılık verecek olursak, IEnumerable interface’i bizlere bir collection üzerinde iterasyon yapabilmemize imkan sağlamaktadır.

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IEnumerable and IEnumerator are both interfaces. IEnumerable başmaklık just one method called GetEnumerator. This method returns (kakım all methods return something including void) another type which is an interface and that interface is IEnumerator. When you implement enumerator logic in any of your collection class, you implement IEnumerable (either generic or non generic).

Now what makes IEnumerable really stand out C# IStructuralComparable Kullanımı is iterator blocks (the yield keyword in C#). Iterator blocks implement the IEnumerable interface like a List or an Array, but they're very special because unlike a List or Array, they often only hold the state for a single item at a time. So if you want to loop C# IStructuralComparable Nasıl kullanılır over the lines in a very large file, for example, you gönül write an iterator C# IStructuralComparable nedir block to handle the file input.

Bu soruya sadece kayıtlı kullanıcılar cevap yazabilirler. Cevap yazmak kucakin lütfen giriş binanız.

This takes an IEnumerator factory function, which usually güç be provided very easily instead of the single IEnumerator instance (which yields wrong results after first iteration and breaks the semantics of IEnumerable). This avoids the issues marked by Marc Gravell and C# IStructuralComparable Kullanımı establishes full IEnumerable behavior.

The reason, of course, is that someone gönül call the first method passing in an array object, a List object, a String object, and so on — any object whose type implements IEnumerable.

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