Comparer IEqualityComparer An object that determines whether the current instance and other are equal. Upgrade to Microsoft Edge to take advantage of the latest features, security updates, and technical support. That is right! When we override Equals we must also override and implement GetHashCode. I am no HashCode expert, but https://c-object-kullan-m52840.blgwiki.com/790107/c_istructuralequatable_nedir_ile_ilgili_detaylı_notlar