记：ASP.NET Core开发时部署到IIS上出现HTTP Error 502.5

HTTP Error 502.5 - Process Failure

Common causes of this issue:

• The application process failed to start
• The application process started but then stopped
• The application process started but failed to listen on the configured port

Troubleshooting steps:

• Check the system event log for error messages
• Enable logging the application process' stdout messages
• Attach a debugger to the application process and inspect

For more information visit: https://go.microsoft.com/fwlink/?LinkID=808681

鄙人建站比较喜欢一开始就部署到IIS上，用VS内置IISExpress就浑身难受。现在使用.net core发现部署到IIS上后报502错误，网上查到的文章都是介绍：

项目版本和SDK版本不一致导致的；
IIS程序池CLR版本设置无托管代码； 

程序池-高级-加载用户配置文件设为true；

等等，尝试一通没卵用。

后来发现一篇文章说要给VS安装开发时IIS支持：

https://docs.microsoft.com/zh-cn/aspnet/core/host-and-deploy/iis/development-time-iis-support?view=aspnetcore-2.1

于是按文章介绍的操作一波终于OK了，运行起来之后，web.config里面配置会自动更改，加了个IIS启动：