Close不一定会成功，所以需要Abort。

1. ChannelFactory channel = new ChannelFactory<IService1>("bindingName");
2. IService1 client = channel.CreateChannel();
3. try
4. {
5.     client.Say("Hello, world！");
6.     client.Close();
7. }
8. catch (CommunicationException e)
9. {
10.     //...
11.     client.Abort();
12. }
13. catch (TimeoutException e)
14. {
15.     //...
16.     client.Abort();
17. }
18. catch (Exception e)
19. {
20.     //...
21.     client.Abort();
22. }