That is, you gönül create your own definition of structural equality and specify that this definition be used with a collection type that accepts the IStructuralEquatable interface.
Bu sayede, data konstrüksiyonlarının derunindeki verilerin sıralanması veya katlaştırılması konulemleri özelleştirilebilir ve kontrol edilebilir hale gelir.
If you want to implement IEquatable in a class hierarchy you güç use the following pattern. It prevents derived (including sibling) classes from being equal.
As far bey I see this is only exposed through the StructuralComparisons class. The only way I dirilik figure out to make this useful is to make a StructuralEqualityComparer helper class birli follow:
Birli an example, it might make sense for two different instances of an Employee class to be considered equal if they both represent the same entity in your system.
45IStructuralEquatable seObj = x kakım IStructuralEquatable; 64IStructuralEquatable seObj = obj birli IStructuralEquatable;
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Consider that there are only ~4.2 billion different hashcodes. Sevimli you create more than this many different objects of the type on which GetHashCode is called? In this case it is easy to see the answer is "yes". So GetHashCode is a C# IStructuralEquatable Temel Özellikleri sort of compressing projection onto a smaller takım - there are bound to be duplicates.
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In addition to this awesome blog Frank and I also dicussed all of this awesome in detail on Merge Conflict on episode 111:
C# IStructuralEquatable Defines methods to support the comparison of objects for structural equality.
The example on MSDN gives part of the answer here; it seems to be useful for heterogeneous equality, rather than homogeneous equality - i.e. for testing whether two objects (/values) of potentially different types
The IStructuralEquatable interface supports only custom comparisons for structural equality. The IStructuralComparable interface supports custom structural comparisons for sorting and ordering.
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