Can you explain what interfaces mean in programming?

In programming, an interface is a contract or a set of methods and properties that a class or structure is obliged to implement. Interfaces define what operations are available but do not contain the implementation of these operations.

In C#, an interface is declared using the interface keyword and can only contain method signatures, properties, events, and indexers.

Example of an interface and its implementation:

interface ILogger
{
    void Log(string message);
}

class ConsoleLogger : ILogger
{
    public void Log(string message)
    {
        Console.WriteLine(message);
    }
}

Using interfaces allows creating flexible and extensible architectures, facilitates testing, and supports code maintenance.