private void btnOverNew_Click(object sender, RoutedEventArgs e) { int preNewCount = AandCList.Count; NewAAC newWindow = new NewAAC(AandCList); newWindow.ShowDialog(); int postNewCount = AandCList.Count; //If a new overlay type was added then make it the selected one if (preNewCount != postNewCount) { UpdateOverlayCombobox(); OverlayComboBox.SelectedIndex = AandCList.Count - 1; } //Else dont do anything ResetComboBoxes(); }