using System;

public class Program

{

    public static void Main()

    {

        var person = new Person();

        person.GiveSettings(x =>

                            {

                                x.SetFirstName("Keith");

                                x.SetLastName("Harder");

                                x.SetAge(28);

                            });

        Console.WriteLine(person.FirstName + "\n" + person.LastName + "\nAge: " + person.Age);

    }

    public class Person

    {

        public string FirstName {get; private set;}

        public string LastName {get; private set;}

        public int Age {get; private set;}

        public void SetFirstName(string name)

        {

            FirstName = name;

        }

        public void SetLastName(string name)

        {

            LastName = name;

        }

        public void SetAge(int age)

        {

            Age = age;

        }

        public void GiveSettings(Action<Person> action)

        {

            action(this);   

        }

    }

}