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Sum(IEnumerable, Func) Computes the sum of the sequence of nullable Int64 values that are obtained by invoking a transform function on each element of the input sequence.

foreach C# dilinin deyimi (for eachVisual Basic'te) numaralandırıcıların katışıkşıklığını gizler. Bu nedenle, numaralandırıcıyı elden resmetmek alegori kullanılması foreach önerilir.

Sum(IEnumerable, Func) Computes the sum of the sequence of Decimal values that are obtained by invoking a transform function on each element of the input sequence.

Bu örnekte, articles1 ve articles2 dizileri aynı makale mirlıklarına aynı tam iye evetğundan, CompareTo metodu 0 döndürerek bu dizilerin konstrüktif olarak denktaş olduğunu belirtir.

Also, native collections gönül't be enhanced with extra veri. You'll recognize this next time you find that you pass in (Collection, Extra) to more than one or two methods. It indicates that "Extra" belongs with the object containing your collection.

On the other hand, if you're exposing a read-only view of a mutable collection, then this advice is still valid, although I would probably expose it as IReadOnlyCollection (which didn't exist when I wrote this).

Average(IEnumerable, Func) Computes the average of a sequence of nullable Decimal values that are obtained by invoking a transform function on each element of the input sequence.

Any idea why IList doesn't inherit from ICollection? Since the latter is basically IEnumerable plus Count, and since IList already saf a Count method, C# ReadOnlyCollectionBase Nasıl Kullanılır having IList inherit ICollection wouldn't have required any more work for implementers, but would have allowed someone with an IList to know how many items to expect from an enumeration.

In short: I think your question is covered with a perfectly good answer by Jon Skeet - ReadOnlyCollection or IEnumerable for C# ReadOnlyCollectionBase Nerelerde Kullanılıyor exposing member collections?

Putting that all together, a class that exposes a read-only collection needs three things: A property of type PhvReadOnlyList

Note: C# ReadOnlyCollectionBase Nedir The StringBuilder references themselves are read-only, but the memory pointed to by the references C# ReadOnlyCollectionBase Nedir are still mutable.

Average(IEnumerable, Func) Computes the average of a sequence of nullable Single values that are obtained by invoking a transform function C# ReadOnlyCollectionBase Temel Özellikleri on each element of the input sequence.

If however your intent is to prevent the calling code from observing updates from other threads you'll have to fall back to solutions already mentioned, to perform a deep or shallow copy depending on your need.