Why do I get an error instantiating an interface?

Question

I have a class and an interface, and when I try to instantiate the interface, I get an error:

Cannot create an instance of the abstract class or inter

Answer 1

IUser is the interface, you can't instantiate the interface.

You need to instantiate the concrete class that implements the interface.

IUser user = new User();

or

User user = new User();