private void RadioButton_Click(object sender, RoutedEventArgs e)
 {
     configViewModel = this.DataContext as ConfigSettingViewModel;
     if (configViewModel != null)
     {
         RadioButton chk = (RadioButton)sender;
         string tag = string.Format("{0}", chk.Tag);
         if (tag != null && !tag.Equals(""))
         {
             configViewModel.CheckRadioButtonValueChange(tag, chk.Name);
         }
     }
 }