Bir Unbiased Görünüm C# IEnumerable Temel Özellikleri

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So is it faster to use List over IEnumerable? Only if you want to prevent a query from being executed more than once. But is it better overall? Well in the above, Leopards and Hyenas get converted into single SQL queries each

are two properties in particular—one that points to a query provider (e.g., a LINQ to SQL provider) and another one pointing to a query expression representing the IQueryable object kakım a runtime-traversable abstract syntax tree that birey be understood by the given query provider (for the most part, you dirilik't give a LINQ to SQL expression to a LINQ to Entities provider without an exception being thrown).

g. executing SQL on GarbageCollected contexts). I would say that ICollection is every thing you said apart from the "lazy evaluation" and we should be using that, especially if the veri saf already been enumerated once!

There are many differences but let us discuss about the one big difference which makes the biggest difference. IEnumerable interface is useful when your collection is loaded using LINQ or Entity framework and you want to apply filter on the collection.

An Enumerable is a class that emanet 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.

Why do many philosophers consider a past-eternal universe to be self-explanatory but derece a universe that began with no cause?

C# IEnumerable Nerelerde Kullanılıyor IEnumerable is a generic interface describing something that dirilik be enumerated (you dirilik iterate through it and see/retrieve all of its elements). The content of this IEnumerable dirilik have been pre-generated, or is live/lazily generated when you try to iterate through 'result' (IEnumerable).

ServyServy 203k2727 gold badges342342 silver badges458458 bronze badges 1 @Jay thanks, just noticed that when re-reading.

IEnumerable describes behavior, while List is an C# IEnumerable Nerelerde Kullanılıyor implementation of that behavior. When you use IEnumerable, you give the compiler a chance to defer work until later, possibly optimizing along the way. If you use ToList() you force the compiler to reify the results right away.

for instance, suppose you decided to read a large file line by line and doing something on that, C# IEnumerable Nedir therefore you hayat write your own ReaderEnumrable to C# IEnumerable Temel Özellikleri read your file

Then with a IQueryable the generated SQL will contains “where name = “a”, but with a IEnumerable many more roles will be pulled back from the database, C# IEnumerable Nasıl Kullanılır then the x.name = “a” check will be done by .NET.

Ya öğretmen, onca yazdın çizdin anladıkta dü satır IEnumerable yahut IEnumerator interfacelerini kullanmadın?

If the collection supports indexers, you could also iterate over it with the classic for loop method but the Iterator pattern provides some birçok extras like the ability to add synchronization for threading.

You should still avoid declaring the parameter type as List. Using IList allows the caller to pass arrays and any other objects whose type implements IList.