Chess.Data.Piece.King.IsLegalCastle C# (CSharp) Method

        public bool IsLegalCastle(Square[][] board, Move move)
        {
            var source = board[move.StartRow][move.StartColumn];
            var destination = board[move.EndRow][move.EndColumn];
            var direction = GetMovementModifier(move.ColumnChange);

            var rook = direction > 0
                ? board[move.EndRow][7].ChessPiece
                : board[move.EndRow][0].ChessPiece;

            if (move.RowChange != 0)
                throw new Exception("Illegal move.");
            if (MoveCount > 0)
                throw new Exception("You may only castle if your king has not moved yet.");
            if (destination.ChessPiece != null)
                throw new Exception("You may not castle to an occupied square.");
            if (rook == null || rook.PieceType != Data.Enum.PieceType.Rook || rook.MoveCount > 0)
                throw new Exception("The rook on that side has already moved.");
            if (HasCollision(board, move))
                throw new Exception("There is a piece in the way of the castle.");
            if (IsInCheck(board))
                throw new Exception("You may not castle while in check.");
            if (destination.TargetedByTeam(board, GetOppositeTeam()))
                throw new Exception("You may not castle into check.");

            return true;
        }