public static IEnumerable <IEnumerable <Stone> > GetAllLines(this PlayingBoard playingBoard)
{
if (playingBoard == null)
{
throw new ArgumentNullException("playingBoard");
}
return(playingBoard.GetColumns().Concat(playingBoard.GetRows()).Concat(playingBoard.GetDiagonals()));
}
public static IEnumerable <Stone> GetAllFields(this PlayingBoard playingBoard)
{
if (playingBoard == null)
{
throw new ArgumentNullException("playingBoard");
}
return(playingBoard.GetRows().SelectMany(r => r));
}