One of the great new F# tools in .NET Core 3 Preview 3 is F# interactive as pure .NET Core application. To use dotnet fsi in your Visual Studio Code with the Ionide F# IDE plugin instead of the fsharpi binary, add the following to your user settings.json: 1 2 3 "FSharp.fsacRuntime":"netcore","FSharp.fsiFilePath":"/usr/local/share/dotnet/dotnet","FSharp.fsiExtraParameters":["fsi"] Remember to replace fsiFilePath with wherever your .NET Core 3 dotnet binary is installed. (On mac and Linux, do w...