The Ultimate Guide To C# IList Nasıl Kullanılır

The Ultimate Guide To C# IList Nasıl Kullanılır

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It's always best to use the lowest base type possible. This gives the implementer of your interface, or consumer of your method, the opportunity to use whatever they like behind the scenes.

Same principle birli before, reversed. Offer the bare minimum that your caller requires. If the caller only requires the ability to enumerate the sequence, only give them an IEnumerable.

So I came across an interesting problem today. We have a WCF web service that returns an IList. Hamiş really a big deal until I wanted to sort it.

Sıfır ast limitına ehil yalnızca boyutlu diziler kendiliğinden olarak uygular IList. Bu, diziler ve gayrı derme türleri arasında yineleme düzenlemek dâhilin aynı kodu kullanabilen umumi yöntemler oluşturmanıza olanak tanılamar.

Your code is now broken, because int[] implements IList, but is of fixed size. The contract for ICollection (the base of IList) requires the code that uses it to check the IsReadOnly flag before attempting to add or remove items from the collection. The contract for List does derece.

so its safety for you and freedom to the coder who is writing concrete implementation to change or add more functionality to his concrete class.

I thought I'd never need to change from a List but had to later change to use a custom list library for the extra functionality it provided. Because I'd only returned an IList none of the people that used the library had to change their code.

If your methods form part of an interface, the methods will need to be defined using types C# IList Kullanımı available to that interface.

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You would because defining an IList or an ICollection would open up for other implementations of your interfaces.

If you're working within a single method (or even in a single class or assembly in some C# IList Nedir cases) and no one outside is going to see what you're doing, use the fullness of a List. But if you're interacting with outside code, like when you're returning a list from a method, then you C# IList Neden Kullanmalıyız only want to declare the interface without necessarily tying yourself to a specific implementation, especially if you C# IList Nasıl Kullanılır have no control over who compiles against your code afterward.

Bu örnekte, Student isminde bir sınıf ve StudentCollection adında C# IList Nasıl Kullanılır CollectionBase derslikından türeyen özel bir koleksiyon dershaneı oluşturduk.

So typically, your methods should accept and return interfaces for collections. This leaves your own implementation and your callers room to decide on the actual implementation bey required.

additional advantage is that your code is safe from any changes to concrete class kakım you are subscribing to only few of the methods of concrete class and those are the ones that are going to be there kakım long as the concrete class inherits from the interface you are using.