DeferredUpdater m_Updater = new DeferredUpdater(TimeSpan.FromSeconds(3),    //The amount of time between two updates that has to pass for an update in database to be required
                                                TimeSpan.FromSeconds(0.5), //The polling time
                                                OnUpdateRequested);           //The callback to use to update in database.

this.PropertyChanged += OnPropertyChanged;
void OnPropertyChanged(object sender, PropertyChangedEventArgs e)
{
   m_Updater.DeferUpdate();
}

void OnUpdateRequested()
{
   //Call to DAL/database.
}