How do I implement an interface in C#?

How do I implement an interface in C#?

To implement an interface in C#, you first define the interface using the 'interface' keyword, then implement it in a class.

Can you show me a simple example?

Sure! Here's a basic example:

public interface IAnimal
{
    void Speak();
}

public class Dog : IAnimal
{
    public void Speak()
    {
        Console.WriteLine("Woof!");
    }
}

In this example, the Dog class implements the IAnimal interface.

What if I want to implement multiple interfaces?

You can implement multiple interfaces by separating them with a comma. For example:

public class Cat : IAnimal, IPet
{
    public void Speak()
    {
        Console.WriteLine("Meow!");
    }
}

Are there any best practices for using interfaces?

Yes! Some best practices include:

1. Use interfaces to define contracts for classes.
2. Keep interfaces focused and cohesive.
3. Prefer interface-based programming over implementation-based.