We upgraded an internal tool, deployed using ClickOnce, to .NET 4.7.1 (net471). When using the Publish option in Visual Studio 2017, the prerequisites don’t provide an option for .NET 4.7.1.

Installing the prerequisites manually

Before starting, make sure you have the Microsoft Framework 4.7.1 Developer Pack installed on your machine.

Then:

• Open C:\Program Files (x86)\Microsoft Visual Studio 14.0\SDK\Bootstrapper\Packages.
• Copy DotNetFX471 over to C:\Program Files (x86)\Microsoft SDKs\ClickOnce Bootstrapper\Packages.

That’s all. Start Visual Studio 2017 and voilà, you should now see the prerequisite Microsoft .NET Framework 4.7.1 (x86 and x64) in the list:

See also .NET Framework deployment guide for developers.