That is, you emanet create your own definition of structural equality and specify that this definition be used with a collection type that accepts the IStructuralEquatable interface.
In certain scenarios (such kakım using the value type as a key in a dictionary) it can murder performance in one foul swoop.
If you want to implement IEquatable in a class hierarchy you kişi use the following pattern. It prevents derived (including sibling) classes from being equal.
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Ee söz gelimi struct yapısında da new operatrisünü kullanırsak eğer tamam müteallik strüktürdan bir nesne üretilecektir ama struct bir porte tipli kararsız yapısında evetğundan dolayı o nesne belleğin Stack kısmında koruma edilecektir.
– Royi Namir Commented Mar 3, 2012 at 18:04 @RoyiNamir user844541's answer is correct, but maybe it is still hard for you to understand without a concrete example, if you are familiar with IEqualityComparer and how it is used by Linq's Distinct(), then after check the source code to see how it implement IStructuralEquatable on referencesource.microsoft.com/#mscorlib/system/collections/…, then you will see how it work.
So, I am apparently wrong as unequal objects may have equal hash codes. But isn't GetHashCode returning a somewhat randomly distributed seki of values a requirement?
When an implementer overrides the virtual Equals method in a struct, the purpose is to provide a more efficient means of performing the value equality check and optionally to base the comparison on some subset C# IStructuralEquatable Nasıl kullanılır of the struct's field or properties.
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When working with collections or structures where the order of elements matters, and you want to compare their structures, IStructuralEquatable hayat be useful.
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That is, you emanet 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 özgü 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.
The IStructuralEquatable interface supports only custom comparisons for structural equality. The IStructuralComparable interface supports custom structural comparisons for sorting and ordering.
Specifically, I do not know the exact type of the object. The only assumption I make is that it inherit from IStructuralEquatable.