///<summary>
/// Removes a change handler from a section.
///</summary>
///<param name="sectionName">
/// The section to remove the handler.
/// </param>
///<param name="handler">
/// The handler to remove.
/// </param>
public void RemoveSectionChangeHandler(string sectionName,
ConfigurationChangedEventHandler handler)
{
notificationCoordinator.RemoveSectionChangeHandler(sectionName, handler);
}