private void Save_Click(object sender, RoutedEventArgs e) { if (String.IsNullOrEmpty(_settings.MachineName)) { MessageBox.Show("Machine Name is a Required Field"); Tabs.TabIndex = 0; MachineName.Focus(); return; } if (String.IsNullOrEmpty(ViewModel.MachineType)) { MessageBox.Show("Machine Type is a Required Field"); Tabs.TabIndex = 0; MachineName.Focus(); return; } DialogResult = true; Close(); }