private void btbNewIng_Click(object sender, RoutedEventArgs e)
 {
     if (string.IsNullOrWhiteSpace(tbxIngName.Text) && string.IsNullOrWhiteSpace(tbxIngPrice.Text) && cbbxIngType.SelectedItem == null)
     {
         MessageBox.Show("Du mangler at udfylde et felt");
     }
     else
     {
         IngredientType selectedtype = (IngredientType)Enum.Parse(typeof(IngredientType), cbbxIngType.SelectedItem.ToString());
         Ingredient     ing          = new Ingredient(decimal.Parse(tbxIngPrice.Text), tbxIngName.Text, selectedtype);
         handler.MakeIngredient(ing);
         handler.GetAllIngredients();
     }
 }