INotifyPropertyChanged: Notify another class

Question

I have a class (let\'s call it MyContainerClass)that is a container for several other classes (let\'s call them ClassA to ClassF). C

Answer 1

Okay, here is what I did after staring at Eren's solution for a while: I also implemented the INotifyPropertyChanged for the container class and registered the PropertyChanged event for each object.

objA.PropertyChanged += updateCount;
objB.PropertyChanged += updateCount;
objC.PropertyChanged += updateCount;

...and so on. Then I added the following method

private void updateCount(object sender, PropertyChangedEventArgs e)
{
    OnPropertyChanged("Count");
}

Now I have the behavior that I want.