You are designing the deployment strategy for an ASP.NET Web application.
You need to recommend an approach for displaying a maintenance notice to users while deploying a new
version of the Web application.
What should you recommend?

A.
Place a file named app_offline.htm in the root ofthe Web application folder.

B.
Place a file named app_offline.aspx in the root of the Web application folder.

C.
In the Web.config file, under the system.web/httpModules element, add a clear element.
D. In the Web.config file, under the system.web/httpRuntime element, set the enable attribute to false.

Explanation:
While the App_offline.htm file exists, any requeststo the Web site are redirected to this file. The file displays a
friendly message that tells clients that the Web site is being updated
http://msdn.microsoft.com/en-us/library/f735abw9(v=vs.85).aspx