using System;

public class Program

{

    public class Habbo

    {

        public string Id { get; set; }

    }

    public static Habbo GetHabbo()

    {

        return new Habbo();

    }

    public static void Main()

    {

        // this ..

        GetHabbo().Id = "id";

        Console.WriteLine(GetHabbo().Id != null);

        // .. is equivalent to this:

        var firstHabbo = GetHabbo();

        firstHabbo.Id = "id";

        var secondHabbo = GetHabbo();

        Console.WriteLine(secondHabbo.Id != null);      

    }

}