using System;

public class Student:Person {
  private String _student_number;
  private String _major;
  
  public String StudentNumber {
    get { return _student_number; }
    set { _student_number = value; }
  }
  
  public String Major {
    get { return _major; }
    set { _major = value; }
  }
  
  public Student(String firstName, String middleName, String lastName, 
                 Sex gender, DateTime birthday, String studentNumber,
                 String major):base(firstName, middleName, lastName, gender, birthday) {
       StudentNumber = studentNumber;
       Major = major;
  }
  
  
  public override String ToString(){
    return (base.ToString() + " Student Number: " + StudentNumber + " Major: " + Major);
  }
	
} // end Student class definition