<?xml version="1.0" encoding="utf-8" ?>
<configuration>
  <configSections>
    <section
      name="nhibernate"
      type="System.Configuration.NameValueSectionHandler, System, Version=1.0.5000.0, Culture=neutral, PublicKeyToken=b77a5c561934e089"
    />
  </configSections>

  <nhibernate>
    <add
      key="hibernate.dialect"
      value="NHibernate.Dialect.SQLiteDialect"
    />

    <add
      key="hibernate.connection.provider"
      value="NHibernate.Connection.DriverConnectionProvider"
    />

   <add
     key="hibernate.connection.driver_class"
      value="NHibernate.Driver.SQLiteDriver"
    />

   <add
     key="hibernate.connection.connection_string"
      value="Data Source=nhibernate.db;Version=3"
    />

   <add
     key="hibernate.query.substitutions"
      value="true=1;false=0"
    />
  </nhibernate>
</configuration>

Configuration cfg = new Configuration();
cfg.AddAssembly("NHibernate");
-----> ISessionFactory factory = cfg.BuildSessionFactory(); <-----
ISession session = factory.OpenSession();
ITransaction transaction = session.BeginTransaction();
session.Close();