Version Used:
dotnet 5 preview 8, visual studio 16.8 preview 2

Steps to Reproduce:
Create fresh WPF project from VS modify project like this:

<Project Sdk="Microsoft.NET.Sdk">
    <PropertyGroup>
        <OutputType>WinExe</OutputType>
        <TargetFramework>net5.0-windows</TargetFramework>
        <UseWPF>true</UseWPF>
        <LangVersion>preview</LangVersion>
    </PropertyGroup>

    <ItemGroup>
	    <ProjectReference Include="..\SourceGenerators\SourceGenerators.csproj" OutputItemType="Analyzer" ReferenceOutputAssembly="false" />
    </ItemGroup>
</Project>

Expected Behavior:
The source generator referenced works for me in a console dotnet core app. I would expect this to work in a WPF project too.

Actual Behavior:
In a freshly created WPF (dotnet core) project from the VS-template, however the generator does not seem to run.

Is this intended behavior?

As the generator is not used at all, I have not included it here. It is a slight variation of the HelloWorld sample.