在回滚阶段也添加项目输出.
***使用Installer类来处理此问题，该类提供Install和Uninstall接口.

看到这个:
http://msdn.microsoft.com/en-us/library/d9k65z2d.aspx [ ^ ]

Add Project output in Rollback phase as well.
It is bettter to handle this using Installer class, which provides both Install and Uninstall interfaces.

See this :
http://msdn.microsoft.com/en-us/library/d9k65z2d.aspx[^]