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f#visual-studio-codeionideexpecto

F#, VSCode and OSX: The namespace or module 'Expecto' is not defined

I am attempting to get started with F Sharp.

I have mono installed via brew and dotnetcore installed via d/l.

I have VS Code and the ionide plugin installed.

I have done the following steps:

  • project > new > expecto
  • paket install
  • fake build
  • expecto run

Install appears to occur with no errors. Build directory is empty after the fake build task. Expecto run does ... nothing.

When I open the generated Main.fs file, the editor tells me:

The namespace or module 'Expecto' is not defined

Is there something I am missing?

Solution

  • For future reference the fix if you are staying with the Ionide generated defaults is to make sure your target framework is set to .net core and not .net framework

    <TargetFramework>netcoreapp2.0</TargetFramework>