When multiple .NET Framework versions are executing side-by-side on a single computer, the ASP.NET ISAPI version mapped to an ASP.NET application determines which common language runtime (CLR) version is used for the application. The ASP.NET IIS Registration Tool (Aspnet_regiis.exe) is used by Advanced Installer to easily update the script maps for an ASP.NET application to point to the ASP.NET ISAPI version that you configure.

ASP.NET Version

Configure the version of ASP.NET that your web application is using.

• <not specified> - no ASP.NET registration is made;
• 1.1.4322 - register your application with .NET 1.1;
• 2.0.50727 - register your application with .NET 2.0, 3.0, or 3.5;
• 4.0.30319 - register your application with .NET 4.0;

Prefer 64-bit version (if available)

On 64-bit systems, if both a 32-bit and a 64-bit version of the same .NET Framework are found, register with the 64-bit version.

Use this version for all child web applications

Installs the script map that points to the ASP.NET ISAPI version you configure to all ASP.NET applications at the specified application root path and its subdirectories.

Restart W3SVC after ASP.NET registration

Triggers a restart of the World Wide Web Publishing Service after installing or updating ASP.NET script maps. When you use this option, all application pools are recycled.