using System;

using System.Linq;

using System.Collections.Generic;

​

namespace Blah

{

    public class Program

    {

        public static void Main()

        {

            IMeetingDataManager mgr = new MeetingDataManager();

            var meeting = mgr.Get(123);

            meeting.Name = meeting.Name + "amended";

            mgr.Commit(meeting);

        }

    }

    public class Meeting { public string Name { get; set; } }

    public interface IMeetingDataManagerWrite

    {

        void Commit(Meeting meeting);

    }

    public interface IMeetingDataManager

    {

        Meeting Get(int id);

        void Commit(Meeting meeting);

    }

    public class MeetingDataManager : IMeetingDataManager, IMeetingDataManagerWrite

    {

        public Meeting Get(int id) { return new Meeting { Name = id.ToString() }; }

        private void commit(Meeting meeting) { Console.WriteLine("Writing {0}", meeting.Name); }

        void IMeetingDataManager.Commit(Meeting meeting) 

        { 

            ExtensionsGoHere.Intercept(this, meeting);

        }

        void IMeetingDataManagerWrite.Commit(Meeting meeting)

        {

            Console.WriteLine("Committing " + meeting.Name);

        }

    }

​

    public static class ExtensionsGoHere

    {

        //THis can be some magic class that knows about logging

        public static void Intercept(IMeetingDataManagerWrite write, Meeting meeting)

        {

            Console.WriteLine("Logging before " + meeting.Name);

            write.Commit(meeting);

            Console.WriteLine("Logging after " + meeting.Name);

        }

    }

}

    /*

    ***** START *****

    public static void Main()

    {

        IMeetingDataManager mgr = new MeetingDataManager();

        var meeting = mgr.Get(123);

        meeting.Name = meeting.Name + "amended";

        mgr.Commit(meeting);

    }

​

    public class Meeting { public string Name { get; set; } }

    public interface IMeetingDataManager

    {

        Meeting Get(int id);

        void Commit(Meeting meeting);

    }

    public class MeetingDataManager : IMeetingDataManager

    {

        public Meeting Get(int id) { return new Meeting { Name = id.ToString() }; }

        public void Commit(Meeting meeting) { Console.WriteLine("Writing {0}", meeting.Name); }

    }

    */

​