The current .NET SDK does not support targeting .N

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 core SDK 2.1.4.

When I created a new web application I get an error saying

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

When I try to build an existing project I get an error

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

I don't see ".net core 2.1" in my target framework

I don't have global.json file in my computer

When I try dotnet --info, I get this

c:\source\dnacloud\testapp>dotnet --info .NET Command Line Tools (2.1.100)

Product Information:
Version: 2.1.100
Commit SHA-1 hash: b9e74c6

Runtime Environment:
OS Name: Windows
OS Version: 10.0.16299
OS Platform: Windows
RID: win10-x64
Base Path: C:\Program Files\dotnet\sdk\2.1.100\

Microsoft .NET Core Shared Framework Host

Version : 2.0.5
Build : 17373eb129b3b05aa18ece963f8795d65ef8ea54

Answer 1

Installing .NET Core SDK 2.1.300-preview2 did the trick for me:

UPDATE: just in case, there is a newer version has been released recently. You can download the new .NET Core SDK for 2.2.0-preview1 (which includes ASP.NET 2.2.0-preview1) here.

See also this answer when you are getting error like this in general:

The current .NET SDK does not support targeting .NET Core 2.X

Answer 2

Stopping IIS for publishing solved the problem. But first I needed to install net core 2.1 SDK and update the Visual Studio.