Question

I would like to override Show() method for form, but the c# does not let me do it. I want to do it to refresh listbox when I am going back to the previous window. I do not want to use observable collection etc.

 protected override void Show() {
            base.Show();
            list.Items.Clear();
            loadListItems();
        }

‘Sklep.OknoProduktow.Show()’: cannot override inherited member
‘System.Windows.Forms.Control.Show()’ because it is not marked
virtual, abstract, or override

Answer 1

Why not use from activated event?

It’ll help you. When your form activated, your listbox will refresh.

I think that you can not override the show() and this is why it did not solve your issue.

private void Form1_Activated(object sender, System.EventArgs e)
{
  list.Items.Clear();
  loadListItems();
}