_From @Tobyee on July 27, 2016 5:56_
Steps to Reproduce:
Error:

I'am sure that .NET Core SDK for Windows was installed and dotnet command can be execute in cmd.
See alse:
https://github.com/dotnet/cli/issues/3858
_Copied from original issue: Microsoft/vscode#9831_
@Tobyee do you have the latest version of the C# extension (check in the extensions panel)? Assuming so, what do you get from:
where dotnet.exedotnet --info@gregg-miskelly
Thanks for you tips. I found the reason.
It's because I have a old version cli tools installed that influence on the new one.
The old version install is:

The new version install is:

I uninstall the old one then it fixed.
@Tobyee glad you solved your issue. I will close this issue then.
Should this not warrant a warning added to the error message, that antique SDK versions can be the cause?
@Luckz if you are running into a problem related to this and would like some help, or have a concrete suggestion, please open a new issue.
What do Linux users do?
@EliasCK if you are running into a problem related to this and would like some help, or have a concrete suggestion, please open a new issue so we can help understand what is going on on your machine.
Most helpful comment
@gregg-miskelly
Thanks for you tips. I found the reason.
It's because I have a old version cli tools installed that influence on the new one.
The old version install is:


The new version install is:
I uninstall the old one then it fixed.