using System;

​

//interface 

interface ICourseName

{

    //interface method (does not have a body) 

    string printCourseName(); 

}

​

interface IOnline

{

    //interface method (does not have a body) 

    double GetOnlineCourseFee(); 

}

​

interface IOffline

{

    //interface method (does not have a body) 

    double GetOfflineCourseFee(); 

}

​

​

//implemented class 

class Diploma : IOnline, IOffline, ICourseName

{

    public string courseName; 

    public double courseFee;

    public Diploma(string cn, double cf)

    {

        courseName = cn;

        courseFee = cf;

    } 

​

    public string printCourseName()

    {

        return (courseName);

    }

​

    public double GetOnlineCourseFee()

    {

        return (courseFee - courseFee/10);

    }

​

    public double GetOfflineCourseFee()

    {

        return (courseFee);

    }

​

​

}

public class Program

{

    public static void Main()

    {

        Console.WriteLine("Enter course name:");

        string cn = Convert.ToString(Console.ReadLine());

​

        Console.WriteLine("Enter course fees:");

        int cf = Convert.ToInt32(Console.ReadLine());

        Diploma dse = new Diploma(cn, cf); 

        dse.printCourseName();

        Console.WriteLine("Course Name: " + dse.printCourseName());

        dse.GetOnlineCourseFee();

        Console.WriteLine("Online Fees: " + dse.GetOnlineCourseFee());

​

        dse.GetOfflineCourseFee();

        Console.WriteLine("Offline Fees: " + dse.GetOfflineCourseFee());

    }

}