JetBrains Rider 2022.3 Help

Languages and frameworks: F#

JetBrains Rider supports developing and running F# source code. You can create and open F# projects that target the full .NET framework and .NET Core.

Enable the F# Support plugin

This functionality relies on the F# Support plugin, which is bundled and enabled in JetBrains Rider by default. If the relevant features are not available, make sure that you did not disable the plugin.

  1. Press Ctrl+Alt+S to open the IDE settings and select Plugins.

  2. Open the Installed tab, find the F# Support plugin, and select the checkbox next to the plugin name.

You can learn more about the latest F# features in the release notes of the F# plugin.

Mixed-language C# and F# solutions are supported as well. JetBrains Rider can resolve references and use types from C# to F# and vice-versa without requiring projects to be (re)built. Code completion and navigation in a C# project detect the changes made in F# code even without requiring the F# project to be rebuilt. You still need to build a C# project first to make it work the other way around.

Rider recognizes and provides coding assistance for .fs, .fsi .fsx files. F# files can be identified by the Icon F# file icon.

F# support includes:

Prerequisites

Make sure that all SDKs required for projects in your solution, including F# SDK, are installed:

JetBrains Rider natively supports projects that use NuGet, however if your F# project uses Paket instead of NuGet, run the build.cmd file (build.sh for macOS/Linux) located in the project directory before opening the solution.

JetBrains Rider automatically disables its NuGet restore step when such a project is loaded.

Last modified: 24 November 2022