I'm using MiKTeX via pandoc to make a book that contains C# and F# source code. The C# source code gets formatted just fine. How do I make sure the F# code gets formatted also?

  • What utility are you using to format C# source? Sep 22, 2020 at 21:09
  • 3
    Python library pygments do has a lexer for F#, so you can use mitned to highlight/format. Sep 22, 2020 at 21:10

2 Answers 2


Pandoc uses the syntax definitions from KDE's Kate editor. F# is included in that list. In fact, if you run pandoc --list-highlight-languages, you'll find cs (for C#) and fsharp (for F#). Not sure how that inconsitency came to be.

So it should be sufficient to start your code blocks with ``` fsharp to get proper highlighting. You may have to update pandoc to make sure fsharp support is included.

If you'd rather use minted than pandoc's built-in highlighter, checkout the minted pandoc Lua filter.

  • I am using the ```` fsharp` code you mention but it is 100%, definitely, NOT working. Oct 20, 2020 at 6:58
  • 1
    Does pandoc --list-highlight-languages | grep fsharp give any output? If not, update pandoc. If it does, please raise the issue in the GitHub repo.
    – tarleb
    Oct 20, 2020 at 7:45
  • turns out there is a bug; question updated Mar 21, 2022 at 20:08

Turns out this problem is the result of a bug/omission. For C#, you can use either c# or csharp as the language identifier. For F#, you can use fsharp but NOT f#, the latter simply does not work. Changing everything to fsharp fixed the issue.

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