// Remove a handler to the named property (empty means "any property")
private void PrivateRemoveHandler(Type type, EventHandler <PropertyChangedEventArgs> handler, string propertyName)
{
Debug.Assert(handler != null && type != null && propertyName != null,
"Handler, type, and propertyName of event cannot be null");
using (WriteLock)
{
TypeRecord tr = (TypeRecord)this[type];
if (tr != null)
{
tr.RemoveHandler(handler, propertyName);
if (tr.IsEmpty)
{
tr.StopListening();
Remove(tr.Type);
}
}
}
}
