The following example demonstrates the implementation of the IList interface to create a simple, fixed-size list. This code is part of a larger example for the IList interface.
Bir dahaki sefere değerlendirme yapmış olduğumda kullanılmak üzere kademı, e-posta adresimi ve web şehir adresimi bu tarayıcıevet kaydet.
Diyelim ki formunuzdaki textboxları listenize doldurdunuz sadece Text’i boş olan textboxları bulmanız gerekiyor. Bunun bâtınin List u kullanmanız gerekir. Fevkda anlattığımız örneği macerasız olarak yapacak olursak;
Then click on the bulb symbol or place the cursor on the IList and press Strg + "." You will become several implementations offered, like:
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.
then, say, if you had an array and wished to print their type names to the console, you would first have to create a new List and fill it with your types.
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, bey shown above.
If the collection is indexed, the indexes of the elements that are moved are also updated. This behavior does not apply to collections where elements are conceptually grouped into buckets, such bey a hash table.
the method, it yaşama make C# IList Nedir a huge difference -- if they have an array and you're asking for a list, they have to change the array to a list or v.v. whenever calling the method, a total waste of time from both a programmer and performance POV.
Then later if you decide to convert the actual data store from C# IList Nedir a List to a Dictionary and expose the dictionary keys birli the actual value for the property (I have had to do exactly this before). Then consumers who have come to C# IList Neden Kullanmalıyız expect C# IList Kullanımı that their changes will be reflected inside of your class will no longer have that capability. That's a big mesele! If you expose the List bey an IEnumerable you sevimli comfortably predict that your collection is hamiş being modified externally. That is one of the powers of exposing List birli any of the above interfaces.
If you're working within a single method (or even in a single class or assembly in some 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 only want to declare the interface without necessarily tying yourself to a specific implementation, especially if you have no control over who compiles against your code afterward.
You might want to have an IOrderRepository that defines a collection of orders in either a IList or ICollection. You could then have different kinds of implementations to provide a list of orders as long kakım they conform to "rules" defined by your IList or ICollection.
In collections of contiguous elements, such as lists, the elements that follow the insertion point move down to accommodate the new element.
It doesn't affect C# IList Neden Kullanmalıyız the signature of the method, and is takım in stone at compile time. You should instead be helping him get over his confusion about declaring his local like IList foo = new List - this is where his confusion clearly lies.