How to let a parent class know about a change in its children?

Question

This is an example code:

public class MyParent : INotifyPropertyChanged
{
    List MyChildren;

    public bool IsChanged
    {
        get
               


        

Answer 1

Something I do not see in your code sample provide is an actually reference of parent to child. It is not enough to simply have interface to communicate through, but you must also create the reference. Something like myChild.parent = this; followed by the binding of the event handlers across the channel, in the "parent" property of the child object it would look like:

public INotifyPropertyChanged parent
{
   get{return _parent;}
   set
   {
      _parent = value;
      this.PropertyChanged += _parent.RaiseChanged();
   }
}

I don't have enough context to perfect this code for you but this should move you in the right direction.