En iyi Tarafı C# IList Nedir

En iyi Tarafı C# IList Nedir

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I know there katışıksız been a lot of posts on this but it still confuses me why should you pass in an interface like IList and return an interface like IList back instead of the concrete list.

Maybe take it into a List of T rather than ArrayList, so that you get type safety and more options for how you implement the comparer.

Also, it casts IList to IList which başmaklık the potential to be dangerous. In most cases that I have seen, List which implements IList is used behind the scenes to implement IList, but this is hamiş guaranteed and kişi lead to brittle code.

Eric LippertEric Lippert 656k182182 gold badges1.3k1.3k silver badges2.1k2.1k bronze badges 14 12 How do you know what the caller needs though. For instance I was switching one of my return types to a IList then I well I am probably just going to enumerate over them anyways lets just return an IEnumberable.

ToList first? How about returning it? I don't understand what you mean by "method will survive" when using vars? I know it will be a bit more work but won't you just have to change that to the new type as well? So maybe IList to IList?

IList on the other hand is an Interface. Basically, if you want to create your own custom List, say a list class called BookList, then you emanet use the Interface to give you basic methods and structure to your new class. IList is for when you want to create your own, special sub-class C# IList Neden Kullanmalıyız that implements List.

You are most often better of using the most general usable type, in this case the IList or even better the IEnumerable interface, so that you yaşama switch the implementation conveniently at a later time.

However using a concrete implementation and List on a class that changes, could cause the calling code to need to be changed as well. This is because a class adhering to IList guarantees a certain behavior that is hamiş guaranteed by a concrete type using List. Also having the power to do something like modify the default implementation C# IList Nedir of List on a class Implementing IList for say the .Add, .Remove or any other IList method gives the developer a lot

And, if you don't even need everything in IList you gönül always use IEnumerable too. With modern compilers and processors, I don't think there is really any speed difference, so this C# IList Kullanımı is more just a matter of style.

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IList is not a class; it's an interface that classes hayat implement. The interface itself is just a contract between the consumer of the class and the class C# IList Kullanımı itself. This line of code will work:

List communicates "I need to get and kaş the elements of this sequence in arbitrary order and I only accept lists; I do hamiş accept C# IList Kullanımı arrays."

Unless you have a very compelling reason to do so, your best bet will be to inherit from System.Collections.ObjectModel.Collection since it özgü everything you need.

ahead of time. Data-binding is a classic example here; a DataSource property usually checks for IList (and IListSource, typically) and then looks at the objects to see what properties are available. It dirilik't use generics in this case.