Interfaces in C#

An Interface is like an abstract class, but it can only contain signatures of methods, properties, or events.

Key Differences

• A class can implement multiple interfaces, but only inherit from one class.
• Everything in an interface is abstract and public by default.

Syntax

csharp interface IAnimal { void MakeSound(); }

class Pig : IAnimal { public void MakeSound() => Console.WriteLine("Oink"); }