[BUG] CS0436 compiler warning because of source generators when using InternalsVisibleTo

Is there an existing issue for this?

• I have searched the existing issues

Did you read the “Reporting a bug” section on Contributing file?

• I have read the “Reporting a bug” section on Contributing file: https://github.com/CommunityToolkit/Maui/blob/main/CONTRIBUTING.md#reporting-a-bug

Current Behavior

The source generators of the CommunityToolkit.Maui generate compiler warnings in our solution.

We use the [assembly: InternalsVisibleTo(..] attribute so that we can access internal members within unit tests. But the source generators create the same internal classes in all projects. So the compiler warns about:

Warning CS0436: The type 'ColorAnimationExtensions_TimePicker' in 'CommunityToolkit.Maui.SourceGenerators\CommunityToolkit.Maui.SourceGenerators.Generators.TextColorToGenerator\TimePickerTextColorTo.g.shared.cs' conflicts with the imported type...

Complete warning text: [warning]D:\7\s\...\Foo.Test\CommunityToolkit.Maui.SourceGenerators\CommunityToolkit.Maui.SourceGenerators.Generators.TextColorToGenerator\TimePickerTextColorTo.g.shared.cs(63,89): Warning CS0436: The type 'ColorAnimationExtensions_TimePicker' in 'CommunityToolkit.Maui.SourceGenerators\CommunityToolkit.Maui.SourceGenerators.Generators.TextColorToGenerator\TimePickerTextColorTo.g.shared.cs' conflicts with the imported type 'ColorAnimationExtensions_TimePicker' in 'FooLib, Version=3.0.400.0, Culture=neutral, PublicKeyToken=null'. Using the type defined in 'CommunityToolkit.Maui.SourceGenerators\CommunityToolkit.Maui.SourceGenerators.Generators.TextColorToGenerator\TimePickerTextColorTo.g.shared.cs'.

Expected Behavior

no compiler warnings

Workaround

I have added <NoWarn>1701;1702;CS0436</NoWarn> to the unit test project file. This suppress the compiler warning.

Steps To Reproduce

• Just add a C# project (e.g. unit test project) that references a project which includes the CommunityToolkti.Maui.
• Add InternalsVisibleTo attribute so that the newly added project can access the internal members of the referenced project.
• Build and see the compiler warnings

Link to public reproduction project repository

Environment

- .NET MAUI CommunityToolkit:5.0.0

Anything else?

No response

[VladislavAntonyuk]

You should not include analyzers/source generators etc in test project:

<PackageReference Include="CommunityToolkit.Maui" Version="5.1.0">
	<PrivateAssets>all</PrivateAssets>
</PackageReference>

Exclude them to remove warnings:

[pictos]

@omghb, What I posted isn’t a workaround, it’s how you can exclude SG from the build. Your sample project doesn’t reflect the reality of your project, since you just added a Maui app and Unit test, there are no external libs there… We can just provide options for what we see