What
is the difference between abstract class and interface in .NET?
• Abstract
class can have both abstract methods as well as concrete methods. But
all interface methods are abstract in nature; they will not have any implementation.
[フレーム]
• Abstract classes are meant to be inherited but interface doesn’t
involve in inheritance. Interfaces can only be implemented and not inherited.
• A class can inherit from only one abstract class but a class can
implement multiple interfaces.
• A class inheriting from an abstract class should override all abstract
methods. However it is optional to override the concrete methods. But
a class implementing an interface should implement all the interface methods.
(追記) (追記ここまで)