CodeGen not working after upgrading project to .NET6 and LanguageExt 4.1.1

[MrYossu]

I have a project that uses CodeGen. Up until just now it was using .NET5 and LanguageExt 4.0.3, and was working fine. I have the following...

  [Free]
  public interface Fallible<T> {
    [Pure]
    T Success(T value);

    [Pure]
    string BadIdea(string reason);

    [Pure]
    Exception Failure(Exception ex);
  }

However, I just upgraded the project to .NET6 and LanguageExt 4.1.1, and now when I build, it doesn't seem to generate the code, as the extension class I have that provides helper methods for Fallible gives "Cannot resolve symbol 'Failure'" (same for the other two members).

In case it helps, here is the relevant section from the .csproj file. The only changes from the previous version are the version numbers mentioned above...

<Project Sdk="Microsoft.NET.Sdk">

  <!-- Irrelevant bits snipped for clarity -->

  <ItemGroup>
    <PackageReference Include="LanguageExt.Core"
                      Version="4.1.1" />
    <PackageReference Include="LanguageExt.CodeGen"
                      Version="4.1.1"
                      PrivateAssets="all" />
    <PackageReference Include="CodeGeneration.Roslyn.BuildTime"
                      Version="0.6.1"
                      PrivateAssets="all" />
    <DotNetCliToolReference Include="dotnet-codegen"
                            Version="0.6.1" />
  </ItemGroup>

Anyone any idea what I need to do to get this working?

[Malgefor]

I had the same issue. Resolved it by removing all the bin/obj folders and first only building the project that contains the generated code, and after that the rest of the solution.

[MrYossu]

@Malgefor Well cut off both my legs and call me Shorty! That worked fine, thanks for the advice.