namespace inheritance

{

    public class Person

    {

        #region Constructors

        public Person(string firstName, string lastName, int socialSecurityNumber)

        {

            FirstName = firstName;

            LastName = lastName;

            SocialSecurityNumber = socialSecurityNumber;

        }

        #endregion

​

        #region Methods

        public virtual void WakeUp()

        {

            Console.WriteLine($"{FirstName} woke up at 9:00am because they have nothing scheduled in the morning.");

        }

        public void TakeAWalk()

        {

            Console.WriteLine($"{FirstName} has gone on a walk.");

        }

        #endregion

​

        #region Properties

        public string FullName

        {

            get

            {

                return $"{FirstName} {LastName}";

            }

        }

        public string FirstName { get; set; }

        public string LastName { get; set; }

        public int SocialSecurityNumber { get; set; }

        #endregion

    }

​

    public class Worker : Person

    {

        #region Constructors

        public Worker(string firstName, string lastName, int socialSecurityNumber, int hourlyPay) 

            : base(firstName, lastName, socialSecurityNumber)

        {

            HourlyPay = hourlyPay;

        }

        #endregion

​

        #region Methods

        public override void WakeUp()

        {

            Console.WriteLine($"{FirstName} woke up at 6:00am to get to work on time.");

        }

        public void ClockIn()

        {

            Console.WriteLine($"{FirstName} has clocked in.");

        }

        public void GetPaid() 

        {

            Console.WriteLine($"{FullName} was paid ${HourlyPay}.");

        }

        #endregion 

​

        #region Properties

        public int HourlyPay { get; set; }

        #endregion

    }

​

​

    internal class Program

    {

        static void Main(string[] args)

        {

            var people = new Person[5];

​

            people[0] = new Worker("Sara", "Yoshikawa", 123456789, 12);

            people[1] = new Person("AAA", "AAAAAAA", 123456789);

            people[2] = new Person("FFF", "FFFFFFF", 123456789);

            people[3] = new Worker("LLL", "LLLLLLL", 123456789, 22);

            people[4] = new Worker("BBB", "BBBBBBB", 123456789, 18);

​

            for (var i = 0; i < people.Length; i++)

            {

                Console.WriteLine(people[i].FullName);

​

                people[i].WakeUp();

​

                var worker = people[i] as Worker;

                if (worker != null) worker.ClockIn();

                else people[i].TakeAWalk();

​

                //if (people[i] is Worker)

                //{

                //    var worker = (Worker)people[i];

                //    worker.ClockIn();

                //}

                //else

                //{

                //    people[i].TakeAWalk();

                //}

​

                Console.WriteLine();

            }

        }

    }

}