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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.
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For example, if you do not need to access items by index, but constantly insert items at the beginning of your collection and then remove items from the end, a Queue would be far more appropriate to use.
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.
C# IEnumerable Extensions, C#’da bilincinde olarak ya da olmayarak sık sık IEnumerable’dan türemiş nesneleri kullanmaktayız. Evet nedir bu IEnumerable sorusuna yanıt verecek olursak, IEnumerable interface’i bizlere bir collection üzerinde iterasyon yapabilmemize olanak sağlamlamaktadır.
// but this throws an exception, because the pointer or link to the // database namely the DbContext called MyEntities no longer exists.
This way you have possibility to do many things with that query without touching the C# IEnumerable Kullanımı veri (in this case data in the list). List method takes the prepared query and executes it against the source of veri.
"These methods that extend IQueryable(Of T) do hamiş perform any querying directly. Instead, their functionality is to build an Expression object, which is an expression tree C# IEnumerable Nasıl Kullanılır that represents the cumulative query. "'
Örneğin, bir List yahut ArrayList gibi koleksiyonların muhtevaindeki verileri sıralı bir şekilde sarmak yahut mukannen bir koşula göre filtrelemek midein IEnumerator kullanılabilir. Bu, yazılım geliştirme sürecinde verimliliği C# IEnumerable Nasıl Kullanılır fazlalıkrır ve kodun okunabilirliğini iyileştirir.
This sevimli be very useful in certain circumstances, for instance in a massive database table you don't want C# IEnumerable Nedir to C# IEnumerable Kullanımı copy the entire thing into memory before you start processing the rows.
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IQueryable is a very powerful feature that enables a variety of interesting deferred execution scenarios (like paging and composition based queries).
Eğer ki siz “var” değerlendirmek istiyorsanız GetEnumerator metodunun geçmiş dilküş tipini hordaki kadar generic IEnumerator olarak teşhismlamanız gerekmektedir.