public InvoiceRepository(DB_Context _db) { db = _db; }
public CustomerRepository(DB_Context _db) { db = _db; }
public ProductRepository(DB_Context _db) { db = _db; }
public InvoiceCustomerRepository(DB_Context _db) { db = _db; }
public Invoice_detailsRepository(DB_Context _db) { db = _db; }