using System;

// Start here: the interface

interface HotDrink

{

    // fields/properties of the interface

    // this is a property since it has accessors & curly brackets

    bool Instant

    {

        get;

        set;

    }

    // only the method signature

    // just tells you waht to do without telling you how to do it

    void AddSugar();

}

​

// 2nd, come here for an example class that is "implementing" the interface below

public class CupOfCoffee : HotDrink

{

    // fields and properties

    private bool instant;

    // Property implementation that IS REQUIRED by the interface

    public bool Instant

    {

        get

        {

            // this property is connected to the field defined in this class

            return instant;

        }

        set

        {

            instant = value;

        }

    }

​

    // define the method that IS REQUIRED by the interface

    public void AddSugar()

    {

        Console.WriteLine("Adding Suggar!");

    }

    // constructor

    public CupOfCoffee(bool i)

    {

        instant = i;

    }

    public static void Main()

    {

        // Create an instance of a Cup of Coffee Class

        bool i = false;

        CupOfCoffee myCup = new CupOfCoffee(i);

        Console.WriteLine("myCup's instant value is:" + myCup.Instant);

        // let's change the value of Instant

        myCup.Instant = true;

        Console.WriteLine("myCup's instant value is:" + myCup.Instant);

    }

}

​

​

​