Untitled

using System;
using System.Collections.Generic;
using System.Collections;
using System.Text;
using System.Xml;
using System.Xml.Serialization;
using System.IO;

namespace test
{
    class WorldManager
    {
        private ArrayList Worlds = new ArrayList();

        public WorldManager()
        {

        }

        public void Add(World w)
        {
            Worlds.Add( w );
        }

        public void Remove(World w)
        {
            Worlds.Remove( w );
        }

        public World Find(string name)
        {
            for(int x = 0; x < Worlds.Count; x++)
            {
                World w = ((World)Worlds[x]);
                
                if(w.name == name)
                {
                    return w;
                }
            }

            return null;
        }

        public void Save( string filename )
        {
            XmlSerializer xmlser = new XmlSerializer( typeof( ArrayList ) , null, new Type[]{ typeof( World ), typeof( Tile ), typeof( Object ) }, new XmlRootAttribute("WorldList"), "Something");
            TextWriter file = new StreamWriter(filename);

            xmlser.Serialize( file, Worlds );
        }

        public void Load( string filename )
        {
            XmlSerializer xmlser = new XmlSerializer( typeof( ArrayList ) , null, new Type[]{ typeof( World ), typeof( Tile ), typeof( Object ) }, new XmlRootAttribute("WorldList"), "Something");
            TextReader file = new StreamReader(filename);

            Worlds = (ArrayList) xmlser.Deserialize( file );
        }
    }
    public class World
    {
        public World()
        {

        }

        public World(string name)
        {
            this.name = name;
            Tile t = new Tile();
            Object o = new Object();
            t.id = 1;
            o.name = "object";
            tiles.Add(t);
            objects.Add(o);
        }

        public string name;
        public ArrayList tiles = new ArrayList();
        public ArrayList objects = new ArrayList();


    }

    public class Tile
    {
          public int id;
    }

    public class Object
    {
        public string name;
    }

    class Program
    {
        public static void Main(string[] args)
        {
            WorldManager wm = new WorldManager();
            World w = new World("Namek");
            wm.Add(w);
            wm.Save("Worlds.xml");
        }

    }
}