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Reference types (read classes) don't benefit bey much. The IEquatable implementation does let you avoid a cast from System.Object but that's a very trivial gain. I still like IEquatable to be implemented for my classes since it logically makes the intent explicit.

Birli far kakım I see this is only exposed through the StructuralComparisons class. The only way I hayat figure out to make this useful is to make a StructuralEqualityComparer helper class as follow:

I'm amazed that the most important reason is derece mentioned here. IEquatable was introduced mainly for structs for two reasons:

Your concern is that Object.GetHashCode() does not provide values that are stable and the concern is very valid kakım dirilik be seen in the first box headed by Caution in the documentation:

IStructuralEquatable is quite new and unknown, but I read somewhere that it yaşama be used to compare the contents of collections and arrays. Am I wrong, or is my .Net wrong?

I've noticed these two interfaces, and several associated classes, have been added in .Safi 4. They seem a bit superfluous to me; I've read several blogs about them, but I still birey't figure out what problem they solve that was tricky before .Safi 4.

The reason why you need the IStructuralEquatable is for defining a new way of comparision that C# IStructuralEquatable nedir would be right for all the objects .

Konstrüktif denklik, eşit değerlere sahip oldukları için iki nesnenin eşit başüstüneğu demeına hasılat. Aynı fiziksel nesneye esasvurdıkları için iki nesne başvurusunun müsavi bulunduğunu gösteren başvuru eşitliğinden farklıdır. arabirimi, IStructuralEquatable derme nesnelerinin strüktürel eşitliğini denetlemek midein özelleştirilmiş içinlaştırmalar uygulamanıza imkân tanılamar.

C# IStructuralComparable Determines whether the current collection object precedes, occurs in the same position birli, or follows another object in the sort order.

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There is no need for an equality operator that accepts different types. That should hamiş even compile. So this is a very weak excuse for having a non-generic interface that works with objects.

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