If Two objects compare bey equal, the GetHashCode method for each object must return the same value. However, if two objects do derece compare as equal, the GetHashCode methods for the two object do derece have to return different values. = to provide value equality checks (vs the default reference https://claytonqclsa.wikienlightenment.com/7025995/en_iyi_tarafı_c_istructuralequatable_nerelerde_kullanılıyor