Indicates whether Setup.exe displays a Yes/No message box asking the end user if they want to install .NET Framework on the target system. This setting does not determine whether your installation includes the .NET Framework, only whether the end user has a choice to install it.

- No—Installs the .NET Framework, if required, without displaying a message box to the end user.

- Yes—Displays the .NET option message box, which allows the end user to specify whether to install the .NET Framework.

If you select Yes, a message box is displayed on the target system at run time. The message box states that the installation optionally uses the Microsoft .NET Framework and asks if they would like to install it.