/// <summary>
/// Remove an event handler from the event handler invocation list.
/// </summary>
/// <param name="handler">The hander to remove</param>
public void Remove(E handler)
{
WeakEventRegistration.Unregister(
eh =>
{
lock (_eventHandlersLock)
{
_eventHandlers = (E)(Delegate.Remove((Delegate)(_eventHandlers as object), (Delegate)(eh as object)) as object);
return(_eventHandlers);
}
},
handler);
}
/// <summary>
/// Add an event handler to the invocation list of event handlers. If the event handler is for an instance method will create
/// a weak reference to the target instance, so its lifetime is not dependent on the lifetime of the event source
/// </summary>
/// <param name="handler">The handler to add</param>
public void Add(E handler)
{
WeakEventRegistration.Register(
eh =>
{
lock (_eventHandlersLock)
{
_eventHandlers = (E)(Delegate.Combine((Delegate)(_eventHandlers as object), (Delegate)(eh as object)) as object);
}
},
handler,
_weakHandlerGetter,
eh =>
{
lock (_eventHandlersLock)
{
_eventHandlers = (E)(Delegate.Remove((Delegate)(_eventHandlers as object), (Delegate)(eh as object)) as object);
}
}
);
}