public Customer(string connectionString, string providerName) {

            _db=new SouthWind.NorthwindDB(connectionString, providerName);
            Init();            
         }

 public Shipper(){
      _db=new SouthWind.NorthwindDB();
     Init();            
 }

 internal static IRepository<Shipper> GetRepo(string connectionString, string providerName){
     SouthWind.NorthwindDB db;
     if(String.IsNullOrEmpty(connectionString)){
         db=new SouthWind.NorthwindDB();
     }else{
         db=new SouthWind.NorthwindDB(connectionString, providerName);
     }
     IRepository<Shipper> _repo;
     
     if(db.TestMode){
         Shipper.SetTestRepo();
         _repo=_testRepo;
     }else{
         _repo = new SubSonicRepository<Shipper>(db);
     }
     return _repo;        
 }       

 public Employee(){
      _db=new SouthWind.NorthwindDB();
     Init();            
 }

 public Category(){
      _db=new SouthWind.NorthwindDB();
     Init();            
 }

 public SubSonicTest(){
      _db=new SouthWind.NorthwindDB();
     Init();            
 }

 public Product(){
      _db=new SouthWind.NorthwindDB();
     Init();            
 }

 public Order(){
      _db=new SouthWind.NorthwindDB();
     Init();            
 }

        public EmployeeTerritory(string connectionString, string providerName) {

            _db=new SouthWind.NorthwindDB(connectionString, providerName);
            Init();            
         }

 public Region(){
      _db=new SouthWind.NorthwindDB();
     Init();            
 }

 public CustomerDemographic(){
      _db=new SouthWind.NorthwindDB();
     Init();            
 }

        public OrderDetail(string connectionString, string providerName) {

            _db=new SouthWind.NorthwindDB(connectionString, providerName);
            Init();            
         }

 public Supplier(){
      _db=new SouthWind.NorthwindDB();
     Init();            
 }