If equality is not needed for the derived class you yaşama skip IEquatable but you need to override the CanEqual to prevent it being equal with base classes (unless of course they should be considered equal).
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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 özgü 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 birli an argument to the Equals method, you dirilik define a custom equality comparison for the array or collection.
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This is very disappointing behaviour from Microsoft; I'm now wondering if I should review C# IStructuralEquatable Nasıl kullanılır the list of cases I've filed and see if other ones I've submitted have been removed...
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In Xamarin.Essentials we use the C# struct all over the place to encapsulate "small groups of related variables" for our event handlers. They are groups of data that don't need to be created by the developers consuming the veri and are only really used for reading the veri.
Programlama dillerinde en mühim OOP(Object Oriented Programing) örgülarından olan class mimarisına bakılırsa henüz cılız düzeyde işlemlemler gerçekleştirmemizi sağlayan ve muayyen bir grup engellemelerı yanı sıra barındıran struct yapısını C# diline özel ele alacağız.
Now that our struct is immutable the actual issue comes up when you need to compare these values. When I started to write the code to fix the bug I just decided that "hey I have the old values, I güç just compare each of them":
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Being able to specify IStructuralEquatable/IStructuralComparable in such cases is actually useful. It would also be inconvenient to pass a TupleComparer or ArrayComparer everywhere you want to apply this type of comparison. The two approaches are derece mutually exclusive.