Enterprise Application Architecture with LINQ to SQL

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

using Northwind.Business.DataInterfaces;
/*
 **************************************************************
 * Author: Rohit Gadagkar (rohit.gadagkar@gmail.com)
 * Copyright © 2007 Rohit Gadagkar
 * License:
 * Free without any restrictions whatsoever 
 *
 * Created: 9/1/2007
 * 
 * THIS CODE AND INFORMATION IS PROVIDED "AS IS" WITHOUT WARRANTY
 * OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING BUT NOT
 * LIMITED TO THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
 * FITNESS FOR A PARTICULAR PURPOSE.
 **************************************************************  
*/

namespace Northwind.Business
{
    /*
     * The Northwind usecase that I am presenting in this solution is trivial.
     * There is no common DAO functionality that calls for a generic IDAO interface.
     * Hence the BaseBO takes an IDaofactory as dependency. In more complex use cases
     * the BaseBO may take an IDao dependency and the Service Layer could take an
     * IDaoFactory dependency and hand over an IDao dependency to the Business Layer.
     * This pattern assumes that workflow or inter business object calls are handled
     * by the service layer (Session Facade pattern).
     */
    public abstract class BaseBO
    {
        protected IDaoFactory daoFactory;

        public BaseBO(IDaoFactory factory) { daoFactory = factory; }
    }
}