The specified framework 'Microsoft.AspNetCore.App', version '2.1.0' was not found

Question

I tried to upgrade my web app from .net core 2.0 to .net core 2.1 I did:

1) Install Visual Studio Professional 2017 Preview Version 15.8.0 Preview 1.1
2) Install

Answer 1

I opened the Visual Studio installer, went to Individual Components, selected .NET Core 2.1 Runtime (LTS), and installed it.

Solved my problem.