private void OnNavigate(string destination)
        {
            switch (destination)
            {
            case "addNewProduct":
                _addEditProductViewModel.EditFlag = false;
                _addEditProductViewModel.SetProduct(new Product());
                CurrentViewModel = _addEditProductViewModel;
                break;

            default:
                CurrentViewModel = _productListViewModel;
                break;
            }
        }
 private void OnAddNewProduct()
 {
     _addEditProductViewModel.EditFlag = false;
     _addEditProductViewModel.SetProduct(new Product());
     CurrentViewModel = _addEditProductViewModel;
 }
 private void NavigateToEditProduct(Product product)
 {
     _addEditProductViewModel.EditFlag = true;
     _addEditProductViewModel.SetProduct(product);
     CurrentViewModel = _addEditProductViewModel;
 }