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://manuelgpvae.thezenweb.com/büyülenme-hakkında-c-istructuralequatable-nedir-65935561