Difference between a Class and an Interface in .Net

In .Net, a class is a blueprint for creating objects that defines properties, methods, and events. On the other hand, an interface is a contract that defines the methods and properties that a class must implement. Here are some key differences:

1. Classes can have implementation for methods, while interfaces cannot have any implementation.
2. A class can be instantiated to create objects, but interfaces cannot be instantiated on their own.
3. A class can inherit from another class or multiple classes, but an interface can only be implemented by a class.
4. Classes can have access modifiers like public, private, protected, etc., while interfaces have all their members as public by default.

Understanding the distinctions between classes and interfaces is crucial for effective .Net programming and design.