You Don't implement explicitly an equality operator, so == is derece defined particularly for the type. I've noticed these two interfaces, and several associated classes, have been added in .NET 4. They seem a bit superfluous to me; I've read several blogs about them, but I still kişi't figure out https://c-object-kullan-m74062.blogunteer.com/27780122/en-c-structuralcomparisons-temel-Özellikleri-sırları