神马品牌网极品家教全文阅读徐立:我在调试.NET时出现这样的问题，请问是什么原因！
来源：百度文库 编辑：神马品牌网 时间：2024/05/05 12:44:52
A project with an output type of class library cannot be started directly.
In order to debug this project,go to the debugging tab under configuration settings in project properties,and set the start action to start external program or start url.alternatively,you can add non-library project to this solution that uses a reference to this project and set it as the startup project.
In order to debug this project,go to the debugging tab under configuration settings in project properties,and set the start action to start external program or start url.alternatively,you can add non-library project to this solution that uses a reference to this project and set it as the startup project.
你没有设startup project
解决方法:
-->project
---->set as a start up project
a