You Don't implement explicitly an equality operator, so == is not defined particularly for the type. Birli it was implemented, you compare collections using IStructuralComparable, which requires you to pass in an IComparer to use in comparing individual elements from the two structures. Since IComparer and IStructuralComparable are two different https://emiliomwfmu.bmswiki.com/4572854/benim_c_structuralcomparisons_nedir_başlarken_Çalışmak