static void Main(string[] args) { Employee e1 = new Employee("Ujjwal"); e1.GetEmployeeDetails(); PartTimeClerk p1 = new PartTimeClerk(); p1.NoOfWorkingDays = 50; Console.WriteLine(); p1.GetEmployeeDetails(); Employee e2 = new Manager(); e2.GetEmployeeDetails(); if (e2 is Employee) { Console.WriteLine("it is employee"); } Console.ReadKey(); }