Unexpected build warning CS0436

[danieladolfsson-work]

Describe the issue Unexpected build warning (CS0436) when using Microsoft.Azure.Functions.Worker.Sdk and project reference in combination with InternalsVisibleToAttribute.

To Reproduce Steps to reproduce the behavior:

1. Create a new console app project (ConsoleApp1)
2. Create a new unit test project (TestProject1)
3. Add a project reference from TestProject1 to ConsoleApp1
4. Add [assembly: InternalsVisibleTo("TestProject1")] to Program.cs
5. Add NuGet package Microsoft.Azure.Functions.Worker.Sdk 1.7.0 to ConsoleApp1
6. Add NuGet package Microsoft.Azure.Functions.Worker.Extensions.OpenApi 1.5.1 to ConsoleApp1
7. Rebuild -> Build warning CS0436

Expected behavior No warning on build.

Environment

• TargetFramework: net6.0

Additional context The problem is that two identical classes (one per project) are generated by Microsoft.Azure.Functions.Worker.Sdk.Generator, WorkerExtensionStartupCodeExecutor.g.cs.

// <auto-generated/>
using System;
using Microsoft.Azure.Functions.Worker.Core;
[assembly: WorkerExtensionStartupCodeExecutorInfo(typeof(Microsoft.Azure.Functions.Worker.WorkerExtensionStartupCodeExecutor))]
namespace Microsoft.Azure.Functions.Worker
{
    internal class WorkerExtensionStartupCodeExecutor : WorkerExtensionStartup
    {
        public override void Configure(IFunctionsWorkerApplicationBuilder applicationBuilder)
        {
            try
            {
                new Microsoft.Azure.Functions.Worker.Extensions.OpenApi.OpenApiWorkerStartup().Configure(applicationBuilder);
            }
            catch (Exception ex)
            {
                Console.Error.WriteLine("Error calling Configure on Microsoft.Azure.Functions.Worker.Extensions.OpenApi.OpenApiWorkerStartup instance."+ex.ToString());
            }
        }
    }
}

Warning message: Warning CS0436 The type 'WorkerExtensionStartupCodeExecutor' in 'Microsoft.Azure.Functions.Worker.Sdk.Generators\Microsoft.Azure.Functions.Worker.Sdk.Generators.ExtensionStartupRunnerGenerator\WorkerExtensionStartupCodeExecutor.g.cs' conflicts with the imported type 'WorkerExtensionStartupCodeExecutor' in 'ConsoleApp1, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null'. Using the type defined in 'Microsoft.Azure.Functions.Worker.Sdk.Generators\Microsoft.Azure.Functions.Worker.Sdk.Generators.ExtensionStartupRunnerGenerator\WorkerExtensionStartupCodeExecutor.g.cs'. TestProject1 \FunctionApp1\TestProject1\Microsoft.Azure.Functions.Worker.Sdk.Generators\Microsoft.Azure.Functions.Worker.Sdk.Generators.ExtensionStartupRunnerGenerator\WorkerExtensionStartupCodeExecutor.g.cs

[JoasE]

I've got the same issue. I don't think it is causing any problems in production, but the warning does keep popping up in our quality gate check on PR's.

[wkoeter]

Got it aswell

[nootn]

I get this but I think because I have Warnings as Errors I actually can't build my solution! Is it possible for the code to not be generated in the project that is not referencing this package directly? I think that woud be an ideal fix. I.e. in the scenario above, the code would get generated in "ConsoleApp1", but would not get generated in "TestProject1".

[nootn]

Ah, I found a workaround for now! If I ignore the compiler warning in the UnitTest1 project by adding <NoWarn>0436</NoWarn>, then at least I can build again:

  <PropertyGroup>
    <TargetFramework>net6.0</TargetFramework>
    <ImplicitUsings>enable</ImplicitUsings>
    <Nullable>enable</Nullable>
    <NoWarn>0436</NoWarn>
  </PropertyGroup>

[m-malik15]

I have changed version of Microsoft.Azure.Functions.Worker.Sdk from 1.16.3 to 1.16.2. Rebuild and the error is gone

[BrettBailey]

Similar issue here, I had full compile errors in the generated code for WorkerExtensionStartupCodeExecutorInfo.

Fixed with downgrade of Microsoft.Azure.Functions.Worker.Sdk from 1.16.3 to 1.16.2. thanks @m-malik15