public Dictionary<int, Player> players = new Dictionary<int, Player>();
        public Player[] playerList;


    // EXAMPLE: editing the list
        public void AcceptPlayer( Player player ) {
            lock( playerListLock ) {
                lock( mapLock ) {
                    if( map == null ) {
                        LoadMap();
                    }
                }
                players.Add( player.id, player );
                UpdatePlayerList();
            }
            // *snip*
        }


        // Cache the player list to an array (players -> playerList)
        public void UpdatePlayerList() {
            lock( playerListLock ) {
                Player[] newPlayerList = new Player[players.Count];
                int i = 0;
                foreach( Player player in players.Values ) {
                    newPlayerList[i++] = player;
                }
                playerList = newPlayerList;
            }
        }


    // EXAMPLE: fast, safe reading of the list
        // Send a list of players to the specified new player
        internal void SendPlayerList( Player player ) {
            Player[] tempList = playerList;
            for( int i = 0; i < tempList.Length; i++ ) {
                if( tempList[i] != null && tempList[i] != player && !tempList[i].isHidden ) {
                    player.session.Send( PacketWriter.MakeAddEntity( tempList[i], tempList[i].pos ) );
                }
            }
        }