NSString constant, should be used as a token to NSNotificationCenter.
This constant can be used with the MonoMac.Foundation.NSNotificationCenter to register a listener for this notification.
c# Example
// Lambda style
NSNotificationCenter.DefaultCenter.AddObserver (NSPersistentStoreCoordinator.WillRemoveStoreNotification, (notification) => Console.WriteLine ("Received the notification NSPersistentStoreCoordinator", notification);
// Method style
void Callback (NSNotification notification)
{
    Console.WriteLine ("Received a notification NSPersistentStoreCoordinator", notification);
}
void Setup ()
{
    NSNotificationCenter.DefaultCenter.AddObserver (NSPersistentStoreCoordinator.WillRemoveStoreNotification, Callback);
}