Target .NET Framework 2.0 (not .NET Core 2.0) with Visual Studio 2017

Clash Royale CLAN TAG#URR8PPPTarget .NET Framework 2.0 (not .NET Core 2.0) with Visual Studio 2017
I want to contribute to Open Hardware Monitor, which uses .NET Framework 2.0 (again, it is not .NET Core 2.0).
When I clone the repo and open the solution file, Visual Studio 2017 says I have to download some sort of "targeting pack" in this url. However, I cannot find the option to download .NET Framework 2.0. (the minimum version is 3.5 SP1.)
How can I target .NET Framework 2.0 with Visual Studio 2017? I don't want to download and install older versions of Visual Studio.
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