public string TestListEvent(bool clear = false)
{
string listItems = null;
// Create the list
ListWithChangedEvents <int> list = new ListWithChangedEvents <int>();
// Create the listener (instance)
EventListener listener = new EventListener(list);
// Now try to modify the list
list.Add(numberToAdd);
if (clear)
{
list.Clear();
}
foreach (int item in list)
{
listItems += string.Format("Item: {0}\n", item.ToString());
}
listener.Detach();
return(listItems);
}
public void Detach()
{
// Detach the event and delete the list.
List.Changed -= new ChangedEventHandler(ListChanged);
List = null;
}
public EventListener(ListWithChangedEvents <int> list)
{
this.List = list;
// Add the method to be called at the changed event of the list.
List.Changed += new ChangedEventHandler(ListChanged);
}
