Release version of .NET Core 2.1 is incompatible - "Specified framework not found [...] version '2.1.0-preview1-26216-03"

I upgraded my project to the freshly released .NET Core 2.1. But it seems that nswag is looking for a preview version (which I don’t have installed) and fails because it doesn’t recognize the release version as compatible.

Probably rebuilding with the release version would solve this issue.

> nswag run /runtime:NetCore21

It was not possible to find any compatible framework version
The specified framework 'Microsoft.NETCore.App', version '2.1.0-preview1-26216-03' was not found.
  - Check application dependencies and target a framework version installed at:
      C:\Program Files\dotnet\
  - Installing .NET Core prerequisites might help resolve this problem:
      http://go.microsoft.com/fwlink/?LinkID=798306&clcid=0x409
  - The .NET Core framework and SDK can be installed from:
      https://aka.ms/dotnet-download
  - The following versions are installed:
      2.0.0 at [C:\Program Files\dotnet\shared\Microsoft.NETCore.App]
      2.0.5 at [C:\Program Files\dotnet\shared\Microsoft.NETCore.App]
      2.0.6 at [C:\Program Files\dotnet\shared\Microsoft.NETCore.App]
      2.0.7 at [C:\Program Files\dotnet\shared\Microsoft.NETCore.App]
      2.1.0 at [C:\Program Files\dotnet\shared\Microsoft.NETCore.App]

[RicoSuter]

Should be fixed in v11.17.13, please report any problems…

• Release CI build: https://ci.appveyor.com/project/rsuter/nswag/build/991
• AppVeyor problem: https://help.appveyor.com/discussions/problems/12762-automated-net-core-tests-fail-to-run-if-the-any-cpu-platform-is-explicitly-specified
• Fix: https://github.com/RSuter/NSwag/commit/57bc77e114a2af65edc5bacf0963245a0f56b274

[LeonidEfremov]

I have similar issue on my projects and I fix it with global.json

{
  "sdk": {
   "version": "2.1.300"
  }
}