SPWebService.ApplyApplicationContentToLocalServer method
SharePoint 2013
Copies the resource files and DLLs of provisioned Web applications in the Web service to folders within C:\Inetpub\wwwroot\wss\VirtualDirectories.
Assembly: Microsoft.SharePoint (in Microsoft.SharePoint.dll)
Calling the ApplyApplicationContentToLocalServer method copies, for example, the layouts.sitemap file to the \VirtualDirectories\_app_bin directory, and it merges content with the web.config file in the root virtual directory of the SharePoint Web application.
Only local administrators can call this method.