"Are there any simple groups that appear bey zeros of the zeta function?" by Peter Freyd; why is this consternating to mathematicians?
Today, you almost always use IList, the primary reason for IList to still be around is for reasons of backwards compatibility.
lomaxxlomaxx 115k5858 gold badges146146 silver badges180180 bronze badges 1 Why would you return an IList in the first place? From a WCF service?
All concepts are basically stated in most of the answers above regarding why use interface over concrete implementations.
swilliamsswilliams 48.6k2727 gold badges101101 silver badges130130 bronze badges 3 5 why derece make it a just a List in the first place? I still don't understand why bonus you get from making it a IList then in the constructor you make it into a List
List is a specific implementation of IList, which is a container that birey be addressed the same way kakım a linear array T[] using an integer index. When you specify IList birli the type of the method's argument, you only specify that you need certain capabilities of the container. For example, the interface specification does not enforce a specific veri structure to be used.
List implements IList, and so gönül be assigned to the variable. There are also other types that also implement IList.
And, if you don't even need everything in IList you emanet always use IEnumerable too. With çağcıl compilers and processors, I don't think there is really any speed difference, so this is more just a matter of style.
It really comes down to the kind of functionality you need. I'd suggest using the List C# IList Nasıl Kullanılır class in most cases. IList is best for when you need to make a custom array that could have some very specific rules that you'd like to encapsulate within a collection so you don't repeat yourself, but still want .NET to recognize it bey a list.
By asking for more than you need, you (1) make the caller do unnecessary work to satisfy your unnecessary demands, and (2) communicate falsehoods to the reader. Ask only for what you're going to use. That way if the caller saf a sequence, they don't need to call ToList on it to satisfy your demand.
Brad LeachBrad Leach 17k1818 C# IList Neden Kullanmalıyız gold badges7373 silver badges8888 bronze badges 1 3 It will create a new enumerable, which may not be desirable in some scenarios. You cannot sort an C# IList Nasıl Kullanılır IList in-place through the interface except by using ArrayList.Adapter method in my knowledge.
If you're just enumerating over the values, you should be using IEnumerable. Every type C# IList Nasıl Kullanılır of datatype that yaşama hold more than one value implements IEnumerable (or should) and makes your method hugely flexible.
There is a complication though that dynamic gönül't C# IList Kullanımı see explicit implementations, so something hayat implement IList and IList-of-T and yet still be completely unusable from dynamic.