what is the advantage of interface in c# over an abstract class if we have one method declaration?

Question

what is the advantage of interface in c# over an abstract class if we have one method declaration. What will be a better way if we have one method only

Answer 1

The number of operations is not a determining factor in deciding what is better.

The main advantage of an interface over an abstract class is that a class can implement multiple interfaces but can only inherent from one abstract class.

The advantage of an abstract class over an interface is that an abstract class can provide a default implementation of some operations.