To update a .NET web application, please proceed as follows:
1. Create a maintenance file named App_Offline.htm.
2. Copy App_Offline.htm to the root directory of the .NET application.
3. Save web data that you want to update or overwrite.
4. Recycle application pool via System Configurator.
5. Update application or overwrite data via FTP.
6. Delete or rename App_Offline.htm from the root directory of the .NET application.