Incompatiblity with WinUI Preview 4 (using daily)

[dotMorten]

Looks like I'm still hitting some incompatibilities with WinUI and the latest daily (v0.1.362-beta). From my understanding the issues in #59 should have been addressed already.

To repro, create the following project:

<Project Sdk="Microsoft.NET.Sdk">
  <PropertyGroup>
    <TargetFramework>net5.0-windows10.0.18362.0</TargetFramework>
    <TargetPlatformMinVersion>10.0.17134.0</TargetPlatformMinVersion>
    <RootNamespace>CsWin32Repro</RootNamespace>
    <RestoreAdditionalProjectSources>https://pkgs.dev.azure.com/azure-public/vside/_packaging/winsdk/nuget/v3/index.json;$(RestoreAdditionalProjectSources)</RestoreAdditionalProjectSources>
  </PropertyGroup>

  <ItemGroup>
    <PackageReference Include="Microsoft.Windows.CsWin32" Version="0.1.362-beta">
      <PrivateAssets>all</PrivateAssets>
      <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
    </PackageReference>
    <PackageReference Include="Microsoft.WinUI" Version="3.0.0-preview4.210210.4" />
  </ItemGroup>
</Project>

Next add Shell_NotifyIcon to the NativeMethods.txt and compile.
Observe these two build errors:

1>E:\sources.tmp\CsWin32Repro\CsWin32Repro\Microsoft.Windows.CsWin32\Microsoft.Windows.CsWin32.SourceGenerator\NOTIFYICONDATAW.g.cs(146,25,146,29): error CS0234: The type or namespace name 'Guid' does not exist in the namespace 'Microsoft.System' (are you missing an assembly reference?)
1>E:\sources.tmp\CsWin32Repro\CsWin32Repro\Microsoft.Windows.CsWin32\Microsoft.Windows.CsWin32.SourceGenerator\PInvoke.Shell32.g.cs(49,98,49,104): error CS0208: Cannot take the address of, get the size of, or declare a pointer to a managed type ('NOTIFYICONDATAW')
1>Done building project "CsWin32Repro.csproj" -- FAILED.

Remove the WinUI package, and things builds fine.

The first one seems to be able to be addressed with changing internal System.Guid guidItem; to internal global::System.Guid guidItem; which in turn takes care of the second error.

I'm guessing anything that is using a namespace in the type name should be prefixed with global::

[AArnott]

It looks from the errors I'm seeing from your repro that I need to install some VC SDKs... trying now...

[AArnott]

[AArnott]

I never could get the SDKs to work. But I was able to repro the problem trivially in a test so we can make sure this never regresses.

[dotMorten]

Thanks @AArnott . Fix looks great

[dotMorten]

Just confirming that 0.1.370-beta works great with WinUI 3. Thank you!

[dotMorten]

I never could get the SDKs to work.

@AArnott FYI if you're hitting this:

You're missing this:

[AArnott]

I never hit that, because your repro used earlier build targets. But I installed all the ones referenced in your repro and it still didn't work.
No worries though. I don't need to at this point.