M>public Class User
M>{
M>   public string Name{get{...}set{...}}
M>   //....
M>}

M>

M>public class CUserDB
M>{
M>    public static void Create(CUser p_user);
M>    public static void CreateRelation(CUser p_user,CRole p_role);
M>    public static void DeleteRelation(CUser p_user,CRole p_role);
M>    public static void Delete(CUser p_user);
M>    public static void Update(CUser p_user);
M>    public static CUser Load(string p_sUserName);
M>    public static CUser Load(int p_iUserID);
M>    public static CUserCollection GetList();
M>    public static CUserCollection GetList(CRole p_role);
M>    public static SQLDataReader GetListReader();
M>    protected static CUser GetObjectFromReader(SqlDataReader p_reader);
M>}
M>