Programmer - Event not fired when copying entire object. How to do it?

Programmer Question

If I have a class that contains some properties and methods, and when a property is changed, it fires an event (in this case passing a string in the args):

public class Settings
{
    public delegate void SettingsChangedHandler(object sender, string e);
    public event SettingsChangedHandler SettingsChanged;

    private string rootfolder;
    public string RootFolder
    {
        get { return rootfolder; }
        set
        {
            rootfolder = value;
            if (SettingsChanged != null)
                SettingsChanged(this, "ROOT_FOLDER");
        }
    }
}

If i have somewhere in my code:

public Settings SettingsInstance = new Settings();
SettingsInstance.SettingsChanged += new SettingsChangedHandler(SettingsInstance_SettingsChanged);
SettingsInstance = SomeOtherSettingsInstance;

I want all of the properties that have changed to fire their events.

How do I achieve something like this? Surely I don't have to copy them over one at a time?