public string first_name;
public string email_address;
public void print_fullname()
Console.WriteLine("the fullname of the employee is {0} {1}",this.first_name,this.last_name);
class parttime_employee:employee
class fulltime_employee:employee
public int monthly_salary;
public static void Main()
fulltime_employee fpe=new fulltime_employee();
employee emp=new employee();