[Visual Studio] How to set F# as the default language for all cells?

[xperiandri]

How can I set F# as the default language for all cells?
Not to write #!fsharp at the beginning of each cell.

{
  "cells": [
    {
      "cell_type": "code",
      "execution_count": 1,
      "metadata": {
        "dotnet_interactive": {
          "language": "fsharp"
        }
      },
      "source": [
        "\n",
        "#!fsharp\n",
        "open Microsoft.VisualBasic.FileIO"
      ],
      "outputs": []
    },
    {
      "cell_type": "code",
      "execution_count": 1,
      "metadata": {
        "dotnet_interactive": {
          "language": "fsharp"
        }
      },
      "source": [
        "\n",
        "#!fsharp\n",
        "use reader =\n",
        "    new TextFieldParser(\n",
        "        @\"C:\\Users\\Andrii\\_______\\Сайт групи - Документи\\General\\Data source sample\\_______.txt\")\n",
        "reader.FieldWidths <- [|6;10;12;4;8;1;7;4;9|]"
      ],
      "outputs": []
    },
    {
      "cell_type": "code",
      "execution_count": 1,
      "metadata": {
        "dotnet_interactive": {
          "language": "fsharp"
        }
      },
      "source": [
        "\n",
        "#!fsharp\n",
        "while not <| reader.EndOfData do\n",
        "\ttry\n",
        "\t\tlet currentRow = reader.ReadFields ()\n",
        "\t\tprintf \"%A\" currentRow\n",
        "\twith\n",
        "\t| ?: MalformedLineException as ex ->\n",
        "\t\tprintf \"%s\" ex.Message"
      ],
      "outputs": []
    }
  ],
  "metadata": {
    "kernelspec": {
      "display_name": ".NET (C#)",
      "language": "C#",
      "name": ".net-csharp"
    },
    "language_info": {
      "file_extension": ".cs",
      "mimetype": "text/x-csharp",
      "name": "C#",
      "pygments_lexer": "csharp",
      "version": "8.0"
    }
  },
  "nbformat": 4,
  "nbformat_minor": 4
}