网上说什么的都有， 但自己的情况竟然是：visual c#没安装的原因... 高手见笑了。。仅供如我小白提醒。。
It sounds like the C# component of VS 2005 is not installed. *.csproj are C# Project Files. If you go to Help>>About Microsoft Visual Studio, Do you see "Microsoft Visual C# 2005" listed? If not, please install the component and see if that resolves the problem.
本文由VS软件圈（vssoft.net）发布，不代表VS软件圈立场，转载联系作者并注明出处：https://vssoft.net/vsazwt/VS2005anzhuangwenti/2020/0721/648.html
