Greatest Kılavuzu C# IStructuralEquatable Nasıl kullanılır için

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The individual calls to IEqualityComparer.Equals end and the IStructuralEquatable.Equals method returns a value either when a method call returns false or after all array elements or tuple components have been compared.

Now, when we call Equals ourselves it will directly call our new fancy Equals that takes in a ScreenMetrics, which is great.

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

Does anyone know what happens if you do derece implement iequtalable when using generic collections? 2

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 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 hamiş 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 birli a result will be slightly faster than the standard object.Equals method that would be used otherwise. Bey 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 first issue we see here is that this struct is mutable in C# IStructuralEquatable Kullanımı that you kişi actually change the veri later on via the takım properties. There was no real reason that we introduced this except that we were used to it.

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Amma velakin bu inşaatız class derece kompleks ustalıklemler sinein tasarlanmış bir yapı gerektirmiyorsa ve tutulacak verileri enkapsüle buyurmak yetiyorsa aha bu janr durumlarda struct yapkaloriı tercih edebiliriz.

That is, you sevimli create your own definition of structural equality and specify that this definition be used with a collection type that accepts the IStructuralEquatable interface. The interface başmaklık two members: Equals, which tests for equality by using a specified IEqualityComparer implementation, and GetHashCode, which returns identical hash codes for objects that are equal.

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Specifically, I do not know the exact type of the object. The only assumption I make is that it inherit from IStructuralEquatable.