<?xml version="1.0" encoding="utf-8" ?>
<configuration>

  <configSections>
    <section name="hibernate-configuration"
           type="NHibernate.Cfg.ConfigurationSectionHandler, NHibernate" />
  </configSections>
 
  <runtime>
    <assemblyBinding xmlns="urn:schemas-microsoft-com:asm.v1">
      <qualifyAssembly partialName="FirebirdSql.Data.FirebirdClient" fullName="FirebirdSql.Data.FirebirdClient, Version=2.5.0.0, Culture=neutral, PublicKeyToken=3750abcc3150b00c" />
    </assemblyBinding>
  </runtime>

  <hibernate-configuration  xmlns="urn:nhibernate-configuration-2.2" >
    <session-factory>
      <property name="connection.provider">NHibernate.Connection.DriverConnectionProvider</property>
      <property name="connection.driver_class">NHibernate.Driver.FirebirdClientDriver</property>
      <property name="connection.connection_string">Server=localhost;Database=C:\PATIENTS.FDB;User=SYSDBA;Password=masterkey</property>
      <property name="show_sql">false</property>
      <property name="dialect">NHibernate.Dialect.FirebirdDialect</property>
      <property name="command_timeout">60</property>
      <property name="query.substitutions">true 1, false 0, yes 1, no 0</property>
      <property name="proxyfactory.factory_class">NHibernate.ByteCode.LinFu.ProxyFactoryFactory, NHibernate.ByteCode.LinFu</property>
     
      <mapping resource="MyNH.Patients.hbm.xml" assembly="MyNH" />
    </session-factory>
  </hibernate-configuration>
 
</configuration>

using System;
using System.Collections.Generic;
using System.Text;

namespace MyNH
{
    class Patients
    {
        private int pID;
        private string fName;
        private string lName;
        private string tel;
        private string email;
        private string addr;
        private char gender;

        public Patients()
        {
        }

        public int PID
        {
            get { return pID; }
            set { pID = value; }
        }

        public string FName
        {
            get { return fName; }
            set { fName = value; }
        }

        public string LName
        {
            get { return lName; }
            set { lName = value; }
        }

        public string Tel
        {
            get { return tel; }
            set { tel = value; }
        }

        public string Email
        {
            get { return email; }
            set { email = value; }
        }

        public string Addr
        {
            get { return addr; }
            set { addr = value; }
        }

        public char Gender
        {
            get { return gender; }
            set { gender = value; }
        }

    }
}

using System;
using System.Collections.Generic;
using System.Text;

using NHibernate;
using NHibernate.Cfg;

namespace MyNH
{
    class Program
    {
        static void Main(string[] args)
        {
            Configuration cfg = new Configuration();
            cfg.AddAssembly("MyNH");

            ISessionFactory factory = cfg.BuildSessionFactory();
            ISession session = factory.OpenSession();
            ITransaction transaction = session.BeginTransaction();

            Patients newPatient = new Patients();
            newPatient.PID = 4;
            newPatient.FName = "r";
            newPatient.LName = "i";
            newPatient.Tel = "1234353454";
            newPatient.Email = "ri@gmail.com";
            newPatient.Addr = "Malabe";
            newPatient.Gender = 'F';

            session.Save(newPatient);

            transaction.Commit();
            session.Close();

        }
    }
}