using System;

public class Program

{

    public static void Main()

    {

        WhoAmI person1 = new WhoAmI();

        person1.fullName();

        WhoAmI person2 = new WhoAmI("Shannon","RaShawn");

        person2.fullName();

    }

}

​

​

​

class WhoAmI

{

    private string _firstName, _lastName;

    public WhoAmI() : this("No firstName is provided", "No lastName is provided")

    {

​

    }

    public WhoAmI(string firstName, string lastName) // Constructor

    {

        this._firstName = firstName;

        this._lastName = lastName;

    } 

    public void fullName()

    {

        Console.WriteLine("His/Her fullname is {0} {1}",_firstName, _lastName); 

    }   

}

​