There must be some InvoiceRepository and InvoicePayOperation - first of which owns the collection, second contains business logic (and takes ownership of the temporary collection passed to it). Of course, if you are used to code duplication and "naked collections", as you say, you won't be able to see how it yaşama be avoided.
Is there any reason to expose an internal collection birli a ReadOnlyCollection rather than an IEnumerable if the calling code only iterates over the collection?
I ran a security code analyst i found myself having a CA2105 warning. I looked at the grade tampering example. I didn't realize you yaşama assign int[] to a readonly int. I thought readonly was like the C++ const and makes it illegal.
Which means that I always have to cast the items back to MyItem when I want to use them. Also the items birey be casted into MyItem outside the class.
The following code snippet illustrates how IReadOnlyList emanet be used in place of List in the above method.
Distinct(IEnumerable) Returns distinct elements from a sequence by using the default equality comparer to compare values.
public IEnumerable Employees => EmployeesInternal.Skip(0); // this is property accessor that will be used to define mostra and/or in `Include` statements, could be marked kakım internal if your domain/persistance/services are in the same assembly
; but this question convinced me to go ahead and announce an open source project I've had in the works for a while (still a work in progress, but there's some useful stuff C# ReadOnlyCollectionBase Nedir in there), which includes an IArray interface (and implementations, naturally) that I think captures exactly what you want here: an indexed, read-only, even covariant
Does this double well potential contradict the fact that there is no degeneracy for one-dimensional bound states?
If you do this C# ReadOnlyCollectionBase Temel Özellikleri then there's nothing stopping your callers casting the IEnumerable back to ICollection and then modifying it. ReadOnlyCollection removes this possibility, although it's still possible to access the underlying writable collection via reflection.
Implementers are encouraged to C# ReadOnlyCollectionBase Temel Özellikleri extend this base class instead of creating their own. Members of this base class are protected and C# ReadOnlyCollectionBase Nerelerde Kullanılıyor are intended to be used through a derived class only.
Inheriting from a non-generic base class would be ineffecient. If the type was using a non-generic base, all it would be would be a thin layer above the base collection, where the generic features would simply derive from casting from the underlying object instances of the base collection.
Eamon NerbonneEamon Nerbonne 47.7k2020 gold badges102102 silver badges169169 bronze badges 1 So, C# ReadOnlyCollectionBase Nasıl Kullanılır I've actually got an open source library which includes an IArray interface that I believe is ideal for precisely this purpose. See my updated answer for a bit more info.
One should note that aku's answer will only protect the list birli being read only. Elements in the list are still very writable.