Interfaces Vs. Abstract Classes
Interfaces and abstract classes are similar. The following describes some important differences:
- An abstract class may have member variables as well as non-abstract methods or properties. An interface cannot.
- A class or abstract class can only inherit from one class or abstract class.
- A class or abstract class may implement one or more interfaces.
- An interface can only extend other interfaces.
- An abstract class may have non-public methods and properties (also abstract ones). An interface can only have public members.
- An abstract class may have constants, static methods and static members. An interface cannot.
- An abstract class may have constructors. An interface cannot.
Read more about this topic: C Sharp Syntax, Object-oriented Programming (OOP), Interfaces
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