The current .NET SDK does not support targeting .NET Core 2.1. Either target .NET Core 2.0 or lower, or use a .NET SDK that supports .NET Core 2.1

Question

have tried upgrading to the professional version of visual studio 2017 v 15.6.0 (Preview 7.0)

and installed aspnetcore-runtime-2.1.0-preview1-final-win-x64 and .net

Answer 1

This happened to me after installing 2.2.100-preview3-009430 and then updating to Visual Studio 15.9.2.

I resolved by enabling the "Use previews of the .NET Core SDK" option.

1. Go to: Tools > Options > Projects and Solutions > .NET Core

2. Check the "Use previews of the .NET Core SDK" box

3. Restart Visual Studio and rebuild the solution.

VS Preview Options