WinUI build/publish fails due to WindowsAppSDKSelfContained misapplied to referenced project (2.0-prev1)

[Prochy]

Describe the bug

When publishing a WinUI application using dotnet publish, the process fails if the executable project references another WinUI class library project and WindowsAppSDKSelfContained is set to true.

During publishing, the build system appears to propagate or evaluate the WindowsAppSDKSelfContained setting for the referenced class library as well, which leads to the following error:

WindowsAppSDKSelfContained should not be applied to a class library

This results in the publish operation failing, even though the setting is only intended for the executable project.

Steps to reproduce the bug

1. Create two projects WinUI App + WinUI lib
2. Add a reference to WinUI lib to WinUI App
3. Run command for the WinUI App dotnet publish --self-contained true -p:RuntimeIdentifier=win-x64 -p:WindowsAppSDKSelfContained=true

Error:

C:\temp\winui\exe>dotnet publish --self-contained true -p:RuntimeIdentifier=win-x64 -p:WindowsAppSDKSelfContained=true
Restore complete (0.7s)
  lib net10.0-windows10.0.19041.0 win-x64 failed with 1 error(s) (0.6s) → C:\temp\winui\lib\bin\Release\net10.0-windows10.0.19041.0\win-x64\lib.dll
    C:\Users\xy\.nuget\packages\microsoft.windowsappsdk.base\2.0.2-preview\buildTransitive\Microsoft.WindowsAppSDK.Base.targets(20,9): **error WindowsAppSDKSelfContained should not be applied to a class library.**

Expected behavior

The build should pass and the WindowsAppSDKSelfContained shouldn't be applied for the lib projects.

Screenshots

No response

NuGet package version

2.0.0-prev1

Packaging type

No response

Windows version

No response

IDE

No response

Additional context

If I publish it through a profile file then it works:

<?xml version="1.0" encoding="UTF-8"?>
<!--
https://go.microsoft.com/fwlink/?LinkID=208121.
-->
<Project ToolsVersion="4.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
  <PropertyGroup>
    <PublishProtocol>FileSystem</PublishProtocol>
    <Platform>x64</Platform>
    <RuntimeIdentifier Condition="$([MSBuild]::GetTargetFrameworkVersion('$(TargetFramework)')) >= 8">win-x64</RuntimeIdentifier>
    <RuntimeIdentifier Condition="$([MSBuild]::GetTargetFrameworkVersion('$(TargetFramework)')) &lt; 8">win10-x64</RuntimeIdentifier>
    <PublishDir>bin\$(Configuration)\$(TargetFramework)\$(RuntimeIdentifier)\publish\</PublishDir>
    <SelfContained>true</SelfContained>
    <PublishSingleFile>False</PublishSingleFile>
    <PublishReadyToRun>True</PublishReadyToRun>
    <PublishTrimmed>True</PublishTrimmed>
    <TrimmMode>partial</TrimmMode>
    <WindowsAppSDKSelfContained>true</WindowsAppSDKSelfContained>
  </PropertyGroup>
</Project>

[zhuxb711]

Maybe similar to #6353 but in WAP project