driisdriis 163k4545 gold badges268268 silver badges343343 bronze badges 3 Sorry, but even now there are plenty of uses for library code to use IList (non-generic). Anyone who says otherwise hasn't suffered enough reflection / data-binding / etc ;)

Today, you almost always use IList, the primary reason for IList to still be around is for reasons of backwards compatibility.

Here's an example: I had a project once where our lists got very large, and resulting fragmentation of the large object heap was hurting performance. We replaced List with LinkedList. LinkedList does not contain an array, so all of a sudden, we had almost no use of the large object heap.

Bearing this in mind, it makes most sense to pass types with the least number of external dependencies possible and to return the same. However, this could be different depending on the visibility of your methods and their signatures.

Basically, I need to see some actual code examples of how using IList would have solved some problem over just taking List into everything.

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.

use LINQ to perform the conversion of your existing List when you return it - but it would be better to just create a more appropriate type to start with, as shown above.

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If you started with a concrete type and you decided to change to another one, even if it uses the same interface, you're going to break someone else's code unless you started off with an interface or abstract base type. Share Improve this answer Follow

Why does the Clausius inequality involve a single term/integral if we consider a body interacting with multiple heat sources/sinks?

SQL Mükerrer Kayıtlar çıkarmak ve Silmek, ovam ile sql eğitim setime devam ediyorum. Bu makalemda C# IList Nerelerde Kullanılıyor tablolalarımızdaki mükerrer kayıtları nasıl bulabileceğimizi ve silebileceğimizi göstereceğim. SQL Mükerrer…

I leave this up to show that if you needed to do it (e.g. C# IList Nerelerde Kullanılıyor the off chance a third party library returned a List that you needed to convert C# IList Nasıl Kullanılır for another 3rd party library), you emanet do C# IList Kullanımı it this way.

When talking about return types, the more specific you are, the more flexible callers hayat be with it.

would I run into problems with this? Since could they not pass in an array(that özgü a fixed size)? Would it be better maybe for a concrete List?