使用IIS运行时，可以将名为 app_offline.htm 的文件（区分大小写）拖放到应用程序文件夹中。 IIS将停止您的应用程序，并将提供 app_offline.html 文件的内容。现在您可以复制您的申请。完成后删除app_offline.html，IIS将启动您的应用。 docs 中对此进行了描述。以及我的帖子。

When running with IIS you can drop a file called app_offline.htm (case sensitive) to your application folder. IIS will stop your application and will serve the contents of the app_offline.html file. Now you can copy your application. Once finished remove the app_offline.html and IIS will start your app. This is described in the docs and also in my post on running Asp.NET Core apps with IIS.