using System;

​

//Professor Class

public class Professor

{

    //Constructor

    public Professor()

    {

    }

    //Define Fields

    public string ProfessorName;

​

    //Define Property Age

    private int _iAge;

    //Make sure Age is between 18 and 70

    public int iAge

    {

        set

        {

            if (value > 17 && value <71 ) {

                _iAge = value;

            }

            //If Age violates the rule, set the default value as 30

            else {

                _iAge = 30;

            }

        }

        get

        {

            return _iAge;

        }

    }

    //Define Property Degree

    private string _StrDegree;

    //Make sure Degree has at least three letters

    public string StrDegree

    {

        set

        {

            if (value.Length >= 3){

                _StrDegree = value;

            }

            //If Degree violates the rule, set the defaul value as "Master"

            else {

                _StrDegree ="Master";

            }

        }

        get

        {

            return _StrDegree;

        }

    }

}

public class Program

{

    public static void Main(string[] args)

    {

        //Create object ProfessorLiu

        Professor ProfesssorLiu = new Professor();

        // ProfessorName: Liu

        ProfesssorLiu.ProfessorName = "Liu";

        // Age: 99

        ProfesssorLiu.iAge = 99;

        // Degree: PhD

        ProfesssorLiu.StrDegree = "PhD";

        Console.WriteLine("Name: "+ProfesssorLiu.ProfessorName);

        Console.WriteLine("Age: "+ProfesssorLiu.iAge);

        Console.WriteLine("Degree : "+ProfesssorLiu.StrDegree);

    }

}