AIMA.Probability.ConjunctiveProposition.toString C# (CSharp) Méthode

        public String toString()
        {
            if (null == _toString)
            {
                StringBuilder sb = new StringBuilder();
                sb.Append("(");
                sb.Append(left.ToString());
                sb.Append(" AND ");
                sb.Append(right.ToString());
                sb.Append(")");

                _toString = sb.ToString();
            }

            return _toString;
        }
    }