using System;

using System.Collections.Generic;

​

/*

    1. Fix the formatting on the greeting. The output should resemble:

    Hello John Doe

    Hello Jane Doe

    2. Fix bug where users with blank name are greeted. Users without both a first and last name must not be greeted

    3. Perform any refactoring for better code

*/

​

public class User

{

    public string FirstName {get; private set;}//YOU MAY NOT CHANGE THIS LINE

    public string LastName {get; private set;}//YOU MAY NOT CHANGE THIS LINE

    //YOU MAY NOT CHANGE THIS CONSTRUCTOR

    public User(string firstName = "", string lastName = "")

    {

        FirstName = firstName;

        LastName = lastName;

    }

    public void SetName(string valueName, string name)

    {

        if(valueName == "FirstName")

            FirstName = name;

        else if(valueName == "LastName")

            LastName = name;

    }

    public string PrintName()

    {

        return FirstName;

    }

}

public class Program

{

    public static void Main()

    {

        var users = new List<User>() { new User()};//YOU MAY NOT CHANGE THIS LINE

        var u1 = new User();//YOU MAY NOT CHANGE THIS LINE

        u1.SetName("FirstName", "John");

        u1.SetName("lastName", "Doe");

        users.Add(u1);

​

        var u2 = new User();//YOU MAY NOT CHANGE THIS LINE

        u2.SetName("FirstName", "Jane");

        u2.SetName("LastName", "Doe");

        users.Add(u2);

​

        for(int i = 0; i < users.Count; i++)

        {

            Console.Write("Hello ");

            Console.Write(users[i].PrintName());

        }

    }

}