错误提示：“FluentNHibernate.Cfg.FluentConfigurationException”类型的未经处理的异常在FluentNHibernate.dll中发生

using FluentNHibernate.Cfg;
using FluentNHibernate.Cfg.Db;
using NHibernate;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;


namespace TaidouDatebase
{
    class NHibernateHelper
    {
        private static ISessionFactory sessiOnFactory= null;


        private static void InitializeSessionFanctory()
        {
            /* 错误提示：“FluentNHibernate.Cfg.FluentConfigurationException”类型的未经处理的异常在 FluentNHibernate.dll 中发生
               其他信息: An invalid or incomplete configuration was used while creating a SessionFactory. Check PotentialReasons collection, and InnerException for more detail.
               解决方法：  管理NuGet程序包 下载mysql.date.dll
            */
            sessiOnFactory= Fluently.Configure().Database(MySQLConfiguration.Standard.ConnectionString
                 (db => db.Server("localhost").Database("taidou").Username("root").Password("169169"))).Mappings(x => x.FluentMappings.AddFromAssemblyOf()).BuildSessionFactory();


        }


        private static ISessionFactory SessionFactory
        {
            get
            {
                if (sessiOnFactory== null)
                    InitializeSessionFanctory();
                return sessionFactory;
            }
        }


        public static ISession OpenSession()
        {
            return SessionFactory.OpenSession();


        }
    }
}