Keep in mind that for this interface to work correctly, the types within the collection or structure must also implement IStructuralEquatable or provide their own structural equality logic.
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If you want to implement IEquatable in a class hierarchy you gönül use the following pattern. It prevents derived (including sibling) classes from being equal.
As far as I see this is only exposed through the StructuralComparisons class. The only way I gönül figure out to make this useful is to make a StructuralEqualityComparer helper class birli follow:
Although I think the gains from derece 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 katışıksız some performance benefits.
I never put much thought into using a struct over a class or even additional optimizations because to me the struct was optimized already. When I was working on fixing a bug in our DeviceDisplay to derece trigger new events unless a value changed a whole new world opened up to me.
The IEquatable implementation will require one less cast for these classes and as a result will be slightly faster than the standard object.Equals method that would be used otherwise. Kakım an example see the different implementation of the two methods:
Defines a generalized method that a value type or class implements to create a type-specific method for determining equality of instances.
The reason why you need the IStructuralEquatable is for defining a new way of comparision that would be right for all the objects .
Bu örnekte, articles1 ve C# IStructuralEquatable Temel Özellikleri articles2 dizileri aynı makale sarrafiyelıklarına aynı tam ehil başüstüneğundan, CompareTo metodu 0 döndürerek bu dizilerin yapısal olarak bedel bulunduğunu belirtir.
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Fantasy TV series with a male protagonist who uses a bow and arrows and saf a hawk/falcon/eagle type bird companion
However, this is hamiş so great if you are using the struct in a dictionary as my good friend Dustin mentioned to me because a Dictionary will always use the object version of Equals, which falls back to boxing :(