Why Do we have IStructuralComparable and IStructuralEquatable when there already exist the IComparable and IEquatable interfaces? The answer I would offer is that, in general, it's desirable to differentiate between reference comparisons and structural comparisons. = to provide value equality checks (vs the default reference equality check). The MSDN documentation https://brooksboyir.tdlwiki.com/778193/you_should_know_c_istructuralequatable_nasıl_kullanılır_göstergeleri