private void listLocalities_Click(object sender, EventArgs e) { ListBox listLocalities = (ListBox)sender; TextBox tBoxPrice = (TextBox)Controls.Find("tBoxPrice", true)[0]; TextBox tBoxPriceP = (TextBox)Controls.Find("tBoxPriceP", true)[0]; Locality locality = (Locality)listLocalities.SelectedItem; if (listLocalities.SelectedItem != null) { tBoxPrice.Text = "" + locality.GetLastPrice().price1m; tBoxPriceP.Text = "" + locality.GetLastPrice().price1mP; } else { tBoxPrice.Text = "" + 0; tBoxPriceP.Text = "" + 0; } }