What are some examples of interfaces in C#?

What are some examples of interfaces in C#?

In C#, an interface is a contract that defines a set of methods and properties that a class must implement. For example, you might have an interface called IDrawable with a method Draw(). Any class that implements IDrawable must provide an implementation for the Draw() method.

Can you give me a specific example of a class that implements an interface?

Sure! Let's say we have an interface IShape with a method GetArea(). We can create a class Circle that implements IShape like this:

public interface IShape
{
    double GetArea();
}

public class Circle : IShape
{
    public double Radius { get; set; }

    public double GetArea()
    {
        return Math.PI * Radius * Radius;
    }
}

What are the benefits of using interfaces?

Using interfaces promotes a design principle called 'programming to an interface.' This allows for greater flexibility and scalability in your code, as you can easily swap out implementations without changing the code that uses the interface.

Are there any built-in interfaces in C#?

Yes, C# has several built-in interfaces like IEnumerable, IDisposable, and IComparable. These interfaces provide standard functionality that can be implemented by various classes.