using System;

​

public class Program

{

    public static void Main()

    {

        // create an instance of Person

        Person person = new Person();

        // display the MaxDocuments field

        Console.WriteLine(person.MaxDocuments);

        // -- Uncomment the line below and review the error

        //person.MaxDocuments = 10;

    }

}

public class Person

{

    // MaxDocuments can be set on construction of the Person object 

    //    but cannot be modified after initial creation

    public readonly int MaxDocuments;

    // Person Constructor

    public Person()

    {

        // setting MaxDocuments

        MaxDocuments = 2 * 3;

    } 

}