// private WordMatrix _matrix = new WordMatrix();
        public void Learn(IAnnotatedCorpus corpus)
        {
            /*_matrix.AddFeature("Test");
            _matrix.AddFeature("Toto");

            _matrix.Build();

            _matrix.Add("Jesus");

            Console.WriteLine(_matrix.Matrix["Jesus"]);*/
        }
        public void Learn(IAnnotatedCorpus corpus)
        {
            IEnumerable<IAnnotatedShortMessage> e = corpus;

            foreach (IAnnotatedShortMessage message in e)
            {
                switch (message.Polarity)
                {
                    case Polarity.Common.Polarity.POSITIVE:
                        LearnMessage(message, positive);
                        break;
                    case Polarity.Common.Polarity.NEGATIVE:
                        LearnMessage(message, negative);
                        break;
                    case Polarity.Common.Polarity.NEUTRAL:
                        LearnMessage(message, neutral);
                        break;
                }
            }
        }