private void ButtonAddCounter_Click(object sender, EventArgs e) { try { CounterType selectedCounterType = ((KeyValuePair <CounterType, string>)ComboBoxCounterType.SelectedItem).Key; ICounter counter = counterManager.AddNewCounter(selectedCounterType, TextBoxIterations.Text, TextBoxDelay.Text); ListBoxCounters.Items.Add(new CounterViewItem(counter, false)); } catch (Exception ex) { ShowError(ex.Message); } }