private void Add_Click(object sender, RoutedEventArgs e)
        {
            ModifyAssistant.WindowInfo(1);
            Window modify = new ModifyAssistant();

            modify.ShowDialog();
        }
        private void Modify_Click(object sender, RoutedEventArgs e)
        {
            bool   found    = false;
            string SKU_temp = Interaction.InputBox("Ingrese el SKU del producto a modificar", "Buscar por SKU");

            if (SKU_temp != "")
            {
                foreach (InventoryInfo element in InventoryIO.items)
                {
                    if (element.SKU == int.Parse(SKU_temp))
                    {
                        info  = element;
                        found = true;
                    }
                }
                if (found)
                {
                    ModifyAssistant.WindowInfo(0);
                    Window modify = new ModifyAssistant();
                    modify.ShowDialog();
                }
            }
            if (!found && SKU_temp != "")
            {
                MessageBox.Show("No se encontro el elemento.", "Buscar por SKU", MessageBoxButton.OK, MessageBoxImage.Error);
            }
        }