C# Interfaces

Interfaces, like classes, define a set of properties, methods, and events. But unlike classes, interfaces do not provide implementation. They are implemented by classes, and defined as separate entities from classes. An interface represents a contract, in that a class that implements an interface must implement every aspect of that interface exactly as it is defined.

To define an interface:

interface ISampleInterface  

{  

    void doSomething();  

}

To implement an interface in a class:

class SampleClass : ISampleInterface  

{  

    void ISampleInterface.doSomething()  

    {  

        // Method implementation.  

    }  

}