Sttudent

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

namespace Mankind11b
{
    public class Student : Human
    {
        private string facultyNumber;

        public Student(string firstName, string lastName, string facultyNumber) : base(firstName, lastName)
        {
            FacultyNumber = facultyNumber;
        }

        public string FacultyNumber
        {
            get { return facultyNumber; }
            set {
                if (!(value.Length >= 5 && value.Length <= 10))
                {
                    throw new ArgumentException("Invalid faculty number!");
                }
                if (!value.All(Char.IsLetterOrDigit))
                {
                    throw new ArgumentException("Invalid faculty number!");
                }
                facultyNumber = value;
            }
        }

    }
}