Difference between Abstract Classes and Interfaces in C#

When it comes to C# programming, understanding the difference between abstract classes and interfaces is crucial. Both abstract classes and interfaces provide a way to achieve abstraction in C#, but they have some key differences:

• Definition: An abstract class is a class that cannot be instantiated and may contain both abstract and non-abstract members. On the other hand, an interface is a contract that defines a set of methods, properties, events, or indexers that a class must implement.
• Inheritance: In C#, a class can inherit only one abstract class, but can implement multiple interfaces. This allows for more flexibility in designing the class hierarchy.
• Implementation: An abstract class can provide default implementations for some of its members, while an interface cannot contain any implementation and only defines the structure that implementing classes must follow.

Overall, choosing between abstract classes and interfaces depends on the specific design requirements of your C# project. Abstract classes are more suitable when you want to provide a common base implementation for a group of related classes, while interfaces are ideal for defining a contract that classes must adhere to without specifying any implementation details.