fCraft.Player.AddEntity C# (CSharp) Method

        private void AddEntity( [NotNull] Player player, Position newPos )
        {
            if ( player == null )
                throw new ArgumentNullException( "player" );
            if ( freePlayerIDs.Count > 0 ) {
                var pos = new VisibleEntity( newPos, freePlayerIDs.Pop(), player.Info.Rank );
                entities.Add( player, pos );
                SendNow( PacketWriter.MakeAddEntity( pos.Id, player.ListName, newPos ) );
            }
        }