如何阻止异常破坏我的委托链？

I have come across what must be a common problem. When I have an event which may be subscribed to by several different classes, an exception thrown by one of these classes will kill the callback chain; as I do not know a priori in what order the callback is carried out, this can result in unpredictable state changes for some classes and not for others.I have come across what must be a common proble