NHibernate Search

    using NHibernate.Search;
    using NHibernate.Search.Attributes;

    [Indexed]
    public class Book {
        private string author;
        private int id;
        private string name;
        private string summary;

        public Book() {
        }

        public Book(int id,string author, string name, string summary) {
            this.id = id;
            this.author = author;
            this.name = name;
            this.summary = summary;
        }

        [DocumentId]
        public virtual int Id {
            get { return id; }
            set { id = value; }
        }

        [Field(Index.Tokenized, Store = Store.Yes)]
        public virtual string Author {
            get { return author; }
            set { author = value; }
        }

        [Field(Index.Tokenized, Store = Store.Yes)]
        public virtual string Summary {
            get { return summary; }
            set { summary = value; }
        }

        [Field(Index.Tokenized, Store = Store.Yes)]
        public virtual string Name {
            get { return name; }
            set { name = value; }
        }
    }

cfg = new Configuration();
cfg.SetProperty("hibernate.search.default.directory_provider",
                typeof(RAMDirectoryProvider).AssemblyQualifiedName);
cfg.SetProperty(NHibernate.Search.Environment.AnalyzerClass,
                typeof(StopAnalyzer).AssemblyQualifiedName);
cfg.Configure();
sf = cfg.BuildSessionFactory();
SearchFactory.Initialize(cfg, sf);

using (IFullTextSession s = Search.CreateFullTextSession(sf.OpenSession(new SearchInterceptor()))) {
    using(ITransaction tx = s.BeginTransaction()){
        Book b1 = new Book(1,
            "Eric Evans",
            "Domain-Driven Design: Tackling Complexity in the Heart of Software",
            @"This book provides a broad framework for making design decisions and a
            technical vocabulary for discussing domain design. It is a synthesis of
            widely accepted best practices along with the author's own insights and experiences."
            );

        s.Save(b1);

        Book b2 = new Book(2,
            "Pierre Kuate",
            "NHibernate in Action",
            @"In the classic style of Manning's 'In Action' series, NHibernate in Action introduces
            .NET developers to the NHibernate Object/Relational Mapping tool. As NHibernate is a
            port of Hibernate from Java to .NET.");
        s.Save(b2);

        Book b3 = new Book(3,
            "John Doe",
            "Foo book NHibernate",
            "Foo series book");
        s.Save(b3);

        s.Flush();
        tx.Commit();
    }
}

using (IFullTextSession s = Search.CreateFullTextSession(sf.OpenSession(new SearchInterceptor()))) {

        QueryParser qp = new QueryParser("id", new StopAnalyzer());

        IQuery NHQuery = s.CreateFullTextQuery(qp.Parse("Summary:series"), typeof(Book));

        IList result = NHQuery.List();

        Debug.Assert(result.Count == 2);
}

using (IFullTextSession s = Search.CreateFullTextSession(sf.OpenSession(new SearchInterceptor()))) {

        IList result = s.CreateCriteria(typeof(Book))
            .Add(Search.Query("Summary:NHibernate or Name:NHibernate"))
            .List();

        Debug.Assert(result.Count == 2);
}