So if we have IEnumerable birli parameter of any method, we birey pass any collection types to the function. Ie we gönül have method to operate on abstraction not any specific implementation.

So when you have to simply iterate through the in-memory collection, use IEnumerable, if you need to do any manipulation with the collection like Dataset and other veri sources, use IQueryable

An IEnumerable is a thing that emanet be enumerated...which simply means that it saf a GetEnumerator method that returns an IEnumerator.

It's effectively usage birli documentation of intent; I find that those explicit documentations of intent tend to provide exactly that decoupling you point out.

An Enumerable is a class that kişi give you Enumerators. It has a method called GetEnumerator which gives you an Enumerator that looks at its items. When you write a foreach loop in C#, the code that it generates calls GetEnumerator to create the Enumerator used by the loop.

IEnumerator is a class that enumerates collections. A class that implements IEnumerable returns an IEnumerator. A class that implements IEnumerator başmaklık custom enumeration logic.

Ryan LundyRyan Lundy 208k4141 gold badges183183 silver badges214214 bronze badges 3 4 Then why do we need this IEnumerable abstraction, if the only thing it does is just provide an access to Enumerator? Why don't just use Enumerator instead

C# IEnumerator kullanarak MySQL veritabanından data çkol bu verileri DataGridView kontrolüne nasıl ekleyebileceğimizi gösteren örnek harf aşağıda durum almaktadır.

Else use an IEnumerable. The default should be to use the on-demand evaluation in the second example, kakım that generally uses less memory, unless there is a specific reason to store the results in a list.

Using the concept of iterators you güç achieve major improvement in algorithm quality, both in terms of speed and memory usage.

Oh sure, you birey use it to create your own custom collection C# IEnumerable Nasıl Kullanılır types. But for everyday stuff, it probably isn't kakım useful as the collections derived from it.

IEnumerable is an interface that tells us that we emanet enumerate over a sequence of T instances. If you need to allow somebody to see and perform some action for each C# IEnumerable Nerelerde Kullanılıyor object in a collection, this is adequate.

IEnumerable is an interface that defines one method GetEnumerator which returns an IEnumerator interface, this in turn allows C# IEnumerable Kullanımı readonly access to a collection. A collection that implements IEnumerable sevimli be used with a foreach statement.

In addition to all the answers C# IEnumerable Nerelerde Kullanılıyor posted above, here is my two cents. There are C# IEnumerable Nasıl Kullanılır many other types other than List that implements IEnumerable such ICollection, ArrayList etc.