/// <summary>
/// Adds a change handler for a section.
/// </summary>
/// <param name="sectionName">
/// The section to add the handler.
/// </param>
/// <param name="handler">
/// The handler to add.
/// </param>
public void AddSectionChangeHandler(string sectionName,
ConfigurationChangedEventHandler handler)
{
notificationCoordinator.AddSectionChangeHandler(sectionName, handler);
}