using System;

using System.Collections;

interface GFG1 {

    void languages();

}

class Geeks1 : GFG1 {

    // Providing the implementation of languages() method

    public void languages()

    {

        // Creating ArrayList

        ArrayList My_list = new ArrayList();

        // Adding elements in the

        My_list.Add("C");

        My_list.Add("C++");

        Console.WriteLine("Languages provided by GeeksforGeeks:");

        foreach(var elements in My_list)

        {

            Console.WriteLine(elements);

        }

    }

}

// Interface 2

interface GFG2 {

    void courses();

}

// Parent class 2

class Geeks2 : GFG2 {

    // Providing the implementation

    // of courses() method

    public void courses()

    {

        // Creating ArrayList

        ArrayList My_list = new ArrayList();

        // Adding elements in the

        // My_list ArrayList

        My_list.Add("System Design");

        My_list.Add("Fork Python");

​

        Console.WriteLine("\nCourses provided by GeeksforGeeks:");

        foreach(var elements in My_list)

        {

            Console.WriteLine(elements);

        }

    }

}

// Child class

class GeeksforGeeks : GFG1, GFG2 {

    // Creating objects of Geeks1 and Geeks2 class

    Geeks1 obj1 = new Geeks1();

    Geeks2 obj2 = new Geeks2();

    public void languages()

    {

        obj1.languages();

    }

    public void courses()

    {

        obj2.courses();

    }

}

// Driver Class

public class GFG {

    static public void Main()

    {

        // Creating object of GeeksforGeeks class

        GeeksforGeeks obj = new GeeksforGeeks();

        obj.languages();

        obj.courses();

    }

}