DataSource

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

namespace ConsoleApplication1
{
    public abstract class DataSource
    {
        public abstract void addMan(Man m);
        public abstract void updateMan(Man m);
        public abstract void deleteMan(int id);
        public abstract List<Man> getManList();
        public abstract List<Contact> getManContacts(int id);
        public abstract void connect();
    }
}