Chess.Data.Piece.Bishop.GetValidMoves C# (CSharp) Method

        public override IEnumerable<Move> GetValidMoves(Square[][] board)
        {
            var legalMoves = new List<Move>();

            if (!CurrentColumn.HasValue || !CurrentRow.HasValue || !Alive) return legalMoves;

            var column = CurrentColumn.Value;
            var row = CurrentRow.Value;

            var endPositions = new List<Tuple<int, int>>();

            GetDiagonalMoves(board, row, column, endPositions);

            legalMoves.AddRange(endPositions.Select(p => SetupNewMove(p.Item1, p.Item2)));

            return legalMoves;
        }