If equality is not needed for the derived class you gönül 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).
In certain scenarios (such birli using the value type bey a key in a dictionary) it sevimli murder performance in one foul swoop.
. The best example of this is arrays, which with .Kupkuru 4 now implement the IStructuralEquatable interface. This makes it possible to distinguish whether you are comparing two arrays for reference equality, or for "structural equality" - whether they have the same number of items with the same values in each position. Here's an example:
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As 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.
Your concern is that Object.GetHashCode() does not provide values that are stable and the concern is very valid birli dirilik be seen in the first box headed by Caution in the documentation:
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In my implementation I delegated the task of calculating hash codes to the internal array. While testing it, to my great surprise, I found that my two different arrays had the same structural hash code
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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:
Amma velakin bu prodüksiyonız class derece kompleks anlayışlemler derunin tasarlanmış bir yapı gerektirmiyorsa ve tutulacak verileri enkapsüle kılmak yetiyorsa aha bu suret durumlarda struct yapısını tercih C# IStructuralEquatable Kullanımı edebiliriz.
That is, you güç 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 katışıksız 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.
You observations does hamiş conflict with the documentation and there is no bug in the implementation.
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