What are the differences between Abstract Class and Interface in C#?

Differences Between Abstract Class and Interface in C#

When working with object-oriented programming in C#, it is important to understand the differences between abstract classes and interfaces. Here are some key distinctions:

Abstract Class

• Can have both abstract and non-abstract methods.
• May contain method implementations.
• Can have access modifiers.
• Allows single inheritance.
• Used when creating a base class with some default functionality.

Interface

• Contains only method signatures.
• No method implementations are allowed.
• All methods in an interface are public and abstract by default.
• Allows multiple inheritance.
• Used for defining a contract that a class must implement.

Overall, abstract classes are used for creating hierarchies of classes with shared functionality, while interfaces define a contract that a class must adhere to. Both serve different purposes and can be used in different scenarios based on the requirements of the application.