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

        public override bool IsLegalMove(Square[][] board, Move move, IEnumerable<Move> pastMoves = null)
        {
            ValidateNotAttackingSameTeam(board, move);

            if (Math.Abs(move.RowChange) != Math.Abs(move.ColumnChange))
                throw new Exception("You may only move diagonally with a bishop.");
            if (HasCollision(board, move))
                throw new Exception("There is a piece between your bishop and your destination!");

            return true;
        }