public void UnsubscribesFromPropertyChangedEvents()
{
var testModel = new TestModel();
var wrapper = new ChangeNotificationWrapper(testModel);
wrapper.UnsubscribeFromAllEvents();
bool eventRaised = false;
wrapper.PropertyChanged += (sender, e) => eventRaised = true;
testModel.FirstName = "Geert";
Assert.IsFalse(eventRaised);
}