(Requires dotnet to run.)
dotnet run
Then open your browser to http://localhost:5000/
Modify the HintPath
in activePdfApp.csproj to match where your ActivePDF installation is.
<HintPath>C:\Program Files\ActivePDF\Toolkit\DotNetComponent\4.5\APToolkitNET.dll</HintPath>
(This should include installations for both Toolkit and Reader Plus.)