public static NotifyCollectionChangedEventHandler MakeWeak(NotifyCollectionChangedEventHandler handler, Action<NotifyCollectionChangedEventHandler> remove)
{
var reference = new WeakReference(handler.Target);
var method = handler.GetMethodInfo();
NotifyCollectionChangedEventHandler newHandler = null;
newHandler = (sender, e) =>
{
var target = reference.Target;
if (target != null)
{
method.Invoke(target, new object[] { sender, e });
}
else
{
// Collected, unhook us
remove(newHandler);
}
};
return newHandler;
}
