public int AddCarBrand(string name)
 {
     CarBrand newCarBrand = new CarBrand
     {
         Name = name
     };
     db.CarBrands.InsertOnSubmit(newCarBrand);
     Save();
     return newCarBrand.Id;
 }
 partial void DeleteCarBrand(CarBrand instance);
 partial void UpdateCarBrand(CarBrand instance);
 partial void InsertCarBrand(CarBrand instance);