What is Co- and Contra-Variance in C#?

Amit Kumar

14y1.6kC#

1 Answer

Covariance Enables you to use a more derived type than originally specified. You can assign an instance of IEnumerable (IEnumerable(Of Derived) in Visual Basic) to a variable of type IEnumerable. Contravariance Enables you to use a more generic (less derived) type than originally specified. You can assign an instance of IEnumerable (IEnumerable(Of Base) in Visual Basic) to a variable of type IEnumerable.

kapil gupta10y