New notebook with valid first F# code cell and invalid second cell

Untitled-1.ipynb

{
 "cells": [
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {
    "dotnet_interactive": {
     "language": "csharp"
    },
    "polyglot_notebook": {
     "kernelName": "csharp"
    }
   },
   "outputs": [],
   "source": []
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {},
   "outputs": [],
   "source": []
  }
 ],
 "metadata": {
  "kernelspec": {
   "display_name": ".NET (F#)",
   "language": "F#",
   "name": ".net-fsharp"
  },
  "polyglot_notebook": {
   "kernelInfo": {
    "defaultKernelName": "fsharp",
    "items": [
     {
      "aliases": [],
      "languageName": "fsharp",
      "name": "fsharp"
     }
    ]
   }
  }
 },
 "nbformat": 4,
 "nbformat_minor": 2
}