private void BtnAddDish_Click(object sender, EventArgs e)
 {
     if (!string.IsNullOrWhiteSpace(textBox1.Text))
     {
         // it is not empty or null!
         Random rdm        = new Random();
         int    menuItemId = rdm.Next(1, 999999);
         int    VAT;
         if (comboBoxBTW.SelectedItem == comboBoxBTW.Items[0])
         {
             VAT = 21;
         }
         else
         {
             VAT = 6;
         }
         menuItemService.AddMenuItem(menuItemId, textBox1.Text, numericUpDown1.Value, VAT, (int)numericUpDown3.Value, type, comboBoxType.SelectedItem.ToString());
         menuService.AddItemToMenu(menu.Id, menuItemId);
     }
     else
     {
         LblWarning.Text = "Kan geen item zonder naam toevoegen!";
     }
 }