C # comparison between interfaces and abstract classes

1. The interface contains attributes, methods, events, and indexers, but does not contain fields. abstract classes can contain fields.
2. The interface only contains the definition, not the implementation of the definition. Abstract classes can partially include the implementation of methods.
3. A class can implement multiple interfaces, but the abstract class can only be inherited by a single class.
4. Neither the interface nor the abstract class can be instantiated. All methods must be implemented in the implementation class.
5. The interface is a standard, and the abstract class is more like a common problem in the class.
6. interfaces are more abstract than abstract classes.

Continuing study... to be continued