"Are there any simple groups that appear as zeros of the zeta function?" by Peter Freyd; why is this consternating to mathematicians?

C# CollectionBase klası, özelleştirilebilir koleksiyonların oluşturulmasını esenlar ve bu sayede yazılı sınavm projelerinde esneklik ve tekrar kullanılabilirlik sağlamlar.

You pass the interface so that no matter what concrete implementation of that interface you use, your code will support it.

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.

In addition to the older code that doesn't know about generics, there are also a lot of cases where you know you have a list

In some code this hayat be quite important and using concrete classes communicates your intent, your need for that specific class. An interface on the other hand says "I just need to call this set of methods, no other contract implied."

I thought I'd never need to change from a List C# IList Neden Kullanmalıyız 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 C# IList Nasıl Kullanılır to change their code.

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

For collections you should aim to use IEnumerable where possible. C# IList Nerelerde Kullanılıyor This gives the most flexibility but is derece always suited.

If you emanet consider your method, determine that you probably won't be changing the return C# IList Kullanımı collection type, then it is probably safe to return a more exact type. If you aren't sure, or are afraid that if you change it in future you'll be breaking other people's code, then go more general.

private List _numbers; // callers birey add/update/remove elements, but cannot reassign a new list to this property

The most important case for using interfaces over implementations is in the parameters to your API. If your API takes a List parameter, then anyone who uses C# IList Nedir it has to use List.

Özel koleksiyonlar oluşturmanıza olanak tanır: ölçün derlem sınıfları ihtiyaçlarınızı karşılamıyorsa, kendi özel koleksiyonlarınızı C# CollectionBase kullanarak oluşturabilirsiniz. Bu, veri kuruluşlarınızı istediğiniz şekilde özelleştirmenizi katkısızlar.

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 birli long as the concrete class inherits from the interface you are using.