If you think creating a project for Azure Functions in Visual Studio 2019, it is easy, I have a bad news for you!

Easy scenario. You want to create a simple Azure Function project with F# using Visual Studio 2019. Easy, right? First, launch Visual Studio 2019 and select "Create a new project"

Then, you can create new project with the wizard. For example, if you select from the dropdown "All languages" F# and from "All platforms" Azure, surprise surprise...

You can't! There is no option for that. My problem is that I have to create a solution for Azure Functions in F#.

Depressing, I found a workaround that I want to share with you. Hopefully, you can give me a better solution.

Create a new solution in C# for Azure Functions.

Press Next.

Select where you want to create your project and then press Next.

Http Trigger is ok for this example; we have time to complicate the function later. Press Create and then you have you C# project in a solution! Run the project to be sure it is working fine.

Done! Oh, wait, F#?

This is the funny part. Follow my simple instructions:

• close Visual Studio
• rename .csproj to .fsproj
• open the solution file and replace .csproj to .fsproj
• edit the .fsproj file and make sure the following items are in there for Azure Functions v3:

<Project Sdk="Microsoft.NET.Sdk">
  <PropertyGroup>
    <TargetFramework>netcoreapp3.1</TargetFramework>
    <AzureFunctionsVersion>v3</AzureFunctionsVersion>
    <RootNamespace>vspan_aBillity</RootNamespace>
  </PropertyGroup>
  <ItemGroup>
    <PackageReference Include="Microsoft.NET.Sdk.Functions" Version="3.0.3" />
  </ItemGroup>
  <ItemGroup>
    <None Update="host.json">
      <CopyToOutputDirectory>PreserveNewest</CopyToOutputDirectory>
    </None>
    <None Update="local.settings.json">
      <CopyToOutputDirectory>PreserveNewest</CopyToOutputDirectory>
      <CopyToPublishDirectory>Never</CopyToPublishDirectory>
    </None>
  </ItemGroup>
</Project>

Open this solution with Visual Studio again. Now, the solution is in F#. You can add a new Azure Function in F#.

Replace the content of the new file with this one:

namespace FunctionApp1

open System
open Microsoft.Azure.WebJobs
open Microsoft.Azure.WebJobs.Host
open System;
open System.IO;
open System.Threading.Tasks;
open Microsoft.AspNetCore.Mvc;
open Microsoft.Azure.WebJobs;
open Microsoft.Azure.WebJobs.Extensions.Http;
open Microsoft.AspNetCore.Http;
open Microsoft.Extensions.Logging;

module GetOrganizations =
    [<FunctionName("GetOrganizations")>]
    let Run ([<HttpTrigger(AuthorizationLevel.Function, [|"get"|])>] req: HttpRequest) (log: ILogger) = 
        async {
            return "some result"
        }
        |> Async.StartAsTask

Play the project. The function is working and then you can browse your function!

You find this code on my Github.