private void detach_Orders(Orders entity)
 {
     this.SendPropertyChanging();
     entity.Customers = null;
 }
 private void attach_Orders(Orders entity)
 {
     this.SendPropertyChanging();
     entity.Customers = this;
 }
 partial void UpdateOrders(Orders instance);
 partial void DeleteOrders(Orders instance);
 partial void InsertOrders(Orders instance);