The collection used here is clearly mutable in nature. So how do you prevent this veri from being changed?
I agree. IList is too tightly coupled with being both a ReadOnly collection and a Modifiable collection. IList should have inherited from an IReadOnlyList.
Kupkuru 4.5, you may want to try the new read-only collection interfaces. You'll still want to wrap the returned collection in a ReadOnlyCollection if you're paranoid, but now you're derece tied to a specific implementation.
If you (Class A) continue to modify the underlying collection after you hand it out bey a ReadOnlyCollection then class B will see these changes, have any iterators invalidated, etc. and generally be open to any of the usual concurrency issues with collections.
The following code snippet illustrates how IReadOnlyList hayat be used in place of List in the above method.
Sum(IEnumerable, Func) Computes the sum of the sequence of nullable Int32 values that are obtained by invoking a transform function on each element of the input sequence.
Bu makalede, C# metotlarının ne kullanıldığı, ne meselee yaradığı ve nasıl özellikler sunmuş olduğu hakkında elan detaylı haber vereceğim.
An immutable object is defined kakım an object that cannot be changed after it katışıksız been created. Hamiş all collections are immutable, but you gönül use the read-only collection types in .
Birey you arrange 25 whole numbers (hamiş necessarily all different) so that the sum of any three successive terms is even but the sum of all 25 is odd? more hot questions
Yukarıdaki adımları uyma ederek, C# dilinde Queue derslikını etkili bir şekilde kullanabilirsiniz. Queue dershaneı, data mimarilarını yönetmek ve işlem sıralarını hazırlamak karınin oldukça kullanışlıdır.
When you write a For…Each loop to use with a collection, the compiler checks the collection class to see if it implements the IEnumerable interface (or the generic version of that interface, IEnumerable). If the class does implement C# ReadOnlyCollectionBase Temel Özellikleri that interface, then the compiler calls the single method that the interface forces the class to have: the GetEnumerator method.
This answer already assumes you want to return IEnumerable C# ReadOnlyCollectionBase Nasıl Kullanılır without any reasoning to support that decision.
For maximum flexibility, my class doesn't specify the data type of the List in which it keeps its actual veri. Instead, I C# ReadOnlyCollectionBase Nasıl Kullanılır declare my UnderlyingList variable to use any class that implements the IList interface. I've also made this a generic class: Rather than specify what kind of List I'm C# ReadOnlyCollectionBase Nerelerde Kullanılıyor working with, I've forced my class to be instantiated with a data type that the code refers to kakım T. Wherever in my code I need to specify my List's veri type, I just use the T reference. Finally, I've chosen to have this class implement the generic version of IEnumerable, which requires two versions of the GetEnumerator method -- but the code is identical in both versions of the method. Listing 1. The basics of the PhvReadOnlyList class.
This causes unnecessary boxing/unboxing of value types. One of the benefits of using generics C# ReadOnlyCollectionBase Temel Özellikleri is the avoidance of such boxing/unboxing which could have a detremintal effect on the performance of the collections.