using System;

​

namespace Dependency

{

    public interface IDepartment

    {

        void GetDepartmentName();

        void EmployeeCount();

    }

    class ITDepartment : IDepartment

    {

        private int Count;

        public ITDepartment(int count)

        {

            this.Count = count;

        }

        public void GetDepartmentName()

        {

            Console.WriteLine("This is IT Department !");

        }

        public void EmployeeCount()

        {

            Console.WriteLine("Number of employees in IT Department is " + Count);

        }

    }

    class MarketingDepartment : IDepartment

    {

        private int Count;

        public MarketingDepartment(int count)

        {

            this.Count = count;

        }

        public void GetDepartmentName()

        {

            Console.WriteLine("This is Marketing Department !");

        }

        public void EmployeeCount()

        {

            Console.WriteLine("Number of employees in Marketing Department is " + Count);

        }

    }

    class Employee

    {

        public void Display(IDepartment variable)

        {

            variable.GetDepartmentName();

            variable.EmployeeCount();

        }

    }

    public class Program

    {

        public static void Main()

        {

            Employee client1 = new Employee();

            client1.Display(new ITDepartment(9000));

            Console.WriteLine();

            Employee client2 = new Employee();

            client2.Display(new MarketingDepartment(1500));

        }

    }

}