interface inheritance using explicit interface

using System;

namespace practice
{
    interface IEmployee
    {
        void empdisplaydetails();
    }

    interface IManager : IEmployee
    {
        void Managerdetails();
    }

    class Departmentdetails : IManager
    {
        void IEmployee.empdisplaydetails()
        {
            Console.WriteLine("Employee Details");
        }

        void IManager.Managerdetails()
        {
            Console.WriteLine("Manager is working in sales department");
        }
    }

    class Program
    {
        public static void Main(string[] args)
        {
            Departmentdetails d = new Departmentdetails();

            IEmployee emp = d;
            emp.empdisplaydetails();

            IManager mg = d;
            mg.Managerdetails();
        }
    }
}