/// <summary>
 /// Remove the DataGroup to the list of receipeListSelected
 /// </summary>
 /// <param name="sender">The source of the event.</param>
 /// <param name="e">The <see cref="RoutedEventArgs"/> instance containing the event data.</param>
 private void CheckBox_Unchecked(object sender, RoutedEventArgs e)
 {
     if (sender is CheckBox)
     {
         CheckBox        cb   = (CheckBox)sender;
         SampleDataGroup data = (SampleDataGroup)cb.DataContext;
         receipeListSelectedModel.RemoveReceipeList(data);
     }
 }