using System;

public class Professor

{

    //Define Fields

    public string ProfessorName;

    private int _iAge;

    //Create Property for _iAge

    public int iAge

    {

        get

        {

            return _iAge;

        }

        set

        {

            if (value < 18 || value > 70)

            {

                _iAge = 30; //set Default Value

            }

            else

            {

                _iAge = value;

            }

        }

    }

    //create constructor

    public Professor()

    {

    }

}

​

​

public class Program

{

    public static void Main()

    {

        //Create Object

        Professor Professor1 = new Professor();

        //Testing Code

        Professor1.ProfessorName = "First Last";

        Professor1.iAge = 45;

        //Testing Output

        Console.WriteLine(Professor1.ProfessorName);

        Console.WriteLine(Professor1.iAge);

    }

}