Keep In mind that for this interface to work correctly, the types within the collection or structure must also implement IStructuralEquatable or provide their own structural equality logic. = to provide value equality checks (vs the default reference equality check). The MSDN documentation suggests you only do it for immutable https://dantenwcim.bloggerchest.com/27982991/c-istructuralequatable-nasıl-kullanılır-ile-ilgili-detaylı-notlar