Why do we have IStructuralComparable and IStructuralEquatable when there already exist the IComparable and IEquatable interfaces? The answer I would offer is that, in general, it's desirable to differentiate between reference comparisons and structural comparisons.

In certain scenarios (such birli using the value type as a key in a dictionary) it hayat murder performance in one foul swoop.

If you want to implement IEquatable in a class hierarchy you yaşama use the following pattern. It prevents derived (including sibling) classes from being equal.

Daniel A.A. PelsmaekerDaniel A.A. Pelsmaeker 49.2k2121 gold badges112112 silver badges160160 bronze badges 5 In addition to answers which point to duplicate hashcodes bey is documented behavior, some reasoning and reflection would also lead you to the same conclusion.

Although I think the gains from hamiş boxing will be less than the cost for having CanEqual. In that case you should seal your types and you no longer need CanEqual. Sealing also saf some performance benefits.

The generic tuple classes (Tuple, Tuple, Tuple, and so on) and the Array class provide explicit implementations of the IStructuralEquatable interface. By casting (in C#) or converting (in Visual Basic) the current instance of an array or tuple to an IStructuralEquatable interface value and providing your IEqualityComparer implementation bey an argument to the Equals method, you sevimli define a custom equality comparison for the array or collection.

1 My understanding is that it's used for collection like types, and encapsulates the structural part of the comparison, but leaved the comparison of the elements to a comparer passed in by the user. But I'm derece really sure if I really got it.

Fakat, articles1 ve articles3 dizileri aynı makale esaslıklarına farklı sıralarda sahip başüstüneğundan, CompareTo metodu farklı bir haysiyet döndürür ve bu dizilerin yapısal olarak yeksan olmadığını belirtir.

(doesn't violate documentation), but it is clearly derece kakım good bey it would be if 0 were replaced with i. Also there's no reason to loop if the code were just going to use a single value from the array.

Task oluşturmanın kârlemci üzerinde maliyeti vardır ve çok kısaltarak devam eden nöbetlemler muhtevain bir task oluşturmak genel anlamda henüz yavaş çkızılışan uygulamalara vesile olabilir.

Safi on a certain platform, I'm compelled to issue the standard warning hamiş to rely on the values of hashcodes or how they are computed, since it is derece guaranteed to be the same across updates or platforms.

IStructuralEquatable is used with arrays to determine whether the arrays are structurally equal. The StructuralEqualityComparer.Equals method is used for this purpose.

Default property. The second time, it passes the default equality comparer that is returned by the StructuralComparisons.StructuralEqualityComparer property. The third C# IStructuralEquatable Temel Özellikleri time, it passes the custom NanComparer object. Bey the output from the example shows, the first three method calls return true, whereas the fourth call returns false.

While writing my own immutable ByteArray class that uses a byte array internally, I implemented the IStructuralEquatable interface.