public EventListener(ListWithChangedEvent list)
{
List = list;
// Add "ListChanged" to the Changed event on "List":
List.Changed += new EventHandler(ListChanged);
}
public void Detach()
{
// Detach the event and delete the list:
List.Changed -= new EventHandler(ListChanged);
List = null;
}
// Test the ListWithChangedEvent class:
public static void Main()
{
// Create a new list:
ListWithChangedEvent list = new ListWithChangedEvent();
// Create a class that listens to the list's change event:
EventListener listener = new EventListener(list);
// Add and remove items from the list:
list.Add("item 1");
list.Clear();
listener.Detach();
}