what is interface in c# with example

what is interface in c# with example

In C#, an interface defines a contract, specifying methods, properties, events, and indexers that any class or struct implementing it must provide. It's a blueprint for behavior, enabling multiple classes to share common functionality and promoting code reusability.

what is Interface in c#

An interface is a type that defines a set of members (methods, properties, events, and indexers) without providing any implementation. 

Example Interface in c#

 public interface IAnimal

    {

        string MakeSound(); // Method declaration (no implementation)

    }

    // Implement the interface in a class

    public class Dog : IAnimal

    {

        public string MakeSound() // Method implementation

        {

            return "Woof!";

        }

    }

    // Another class implementing the same interface

    public class Cat : IAnimal

    {

        public string MakeSound() // Method implementation

        {

            return "Meow!";

        }

    }

    // Use the interface in another class

    public class AnimalSound

    {

        public void PlaySound(IAnimal animal)

        {

            Console.WriteLine(animal.MakeSound()); // Call the method from the interface

        }

    }

    // Main Program

    public class Program

    {

        public static void Main(string[] args)

        {

            AnimalSound soundPlayer = new AnimalSound();

            Dog dog = new Dog();

            Cat cat = new Cat();

            soundPlayer.PlaySound(dog); // Output: Woof!

            soundPlayer.PlaySound(cat); // Output: Meow!

        }

    }