Interfaces in C# define a contract that classes can implement, specifying a set of methods, properties, and events that the implementing class must provide. An interface serves as a blueprint for implementing common functionality across multiple classes, enabling polymorphism and loose coupling. Interfaces allow for code abstraction, reusability, and promote separation of concerns. In C#, a class can implement multiple interfaces, allowing it to inherit and provide behavior from different sources.
Explore Set #4 of the C# Junior's Essential Guide and gain insights into encapsulation, interfaces, and polymorphism. Understand the significance of bundling data and methods, achieving code abstraction, and leveraging the power of polymorphic behavior in your C# development journey.