public SqlFotoProductenRepository()
 {
     dataProvider = new MSSqlDataProvider();
 }
 public SqlBestellingRepository()
 {
     dataProvider = new MSSqlDataProvider();
 }
 public SqlFotoRepository()
 {
     this.dataProvider = new MSSqlDataProvider();
 }
 public SqlKlantRepository()
 {
     this.dataProvider = new MSSqlDataProvider();
 }