Multiple types were found that match the controller named 'Auth'.

偶然的一个机会，修改了已经开发完毕的一个项目的命名。突然运行发现：

{
"Message": "An error has occurred.",
"ExceptionMessage": "Multiple types were found that match the controller named 'Auth'. This can happen if the route that services this request ('api/{controller}/{action}/{id}') found multiple controllers defined with the same name but differing namespaces, which is not supported. The request for 'Auth' has found the following matching controllers: DuraRetail.Web.Controllers.AuthController DoraRetail.Web.Controllers.AuthController",
"ExceptionType": "System.InvalidOperationException",
"StackTrace": " 在 System.Web.Http.Dispatcher.DefaultHttpControllerSelector.SelectController(HttpRequestMessage request) 在 System.Web.Http.Dispatcher.HttpControllerDispatcher.<SendAsync>d__1.MoveNext()"
}

，

通过清理解决方案后还是不行，最后手动把每个项目下的bin obj文件夹删掉。重新生成解决问题，(通过搜索发现在objReleaseXXXXXXX.csproj.FileListAbsolute.txt中的记录还是旧的文件名)。