[Bug] [S] WebView2Loader.dll is missing in net472 app

Which Version of MSAL are you using ? 4.33

Platform net472

What authentication flow has the issue? Interactive WebView2

Repro 1 WebView2LoaderRepro.zip

• WebView2Library references WebView2 SDK NuGet.
• WebView2Library does specify AnyCPU PlatformTarget explicitly.
• WebView2Library is packed as a NuGet.
• WebView2App references WebView2Library as a NuGet.
• Run WebView2App for net472 target.

Repro 2

1. Use NetDesktopWinFormsWAM project.
2. Update to reference MSAL NuGet instead of source code project.
3. Build, run, do interactive request.
4. WebView2Loader error occurs.

Expected behavior WebView2 should show up.

Actual behavior If App targets net472, I see different behavior depending on the PlatformTarget element in the App csproj.

• None specified - BadImageFormatException
• AnyCPU - DllNotFoundException
• x86 or x64 - everything works

Additional context / logs / screenshots Current workaround is to set PlatformTarget to either x86 or x64 in the app’s project file.

Related issue in WebView2 repo: Using WebView2 in a WPF Assembly

[pmaytak]

@bgavrilMS Adding PlatformTarget element workaround doesn’t work for us.

Should we exclude WebView2 here for NetFx targets? https://github.com/AzureAD/microsoft-authentication-library-for-dotnet/blob/c25582a72f1dd7f9a3270120c490734d164c4dc0/src/client/Microsoft.Identity.Client/Platforms/Features/WebView2WebUi/WebView2WebUiFactory.cs#L46-L50

NetDesktopWinFormsWAM still doesn’t include the WebView2Loader.dll.

NetCoreWinFormsWAM does include the different WebView2Loader.dll runtimes.

Also for reference: Release notes for WebView2 SDK.

[bgavrilMS]

I was not able to reproduce this issue. @pmaytak - could you try to create a simple repro and open a bug on WebView2 team ? Should be sufficient to just try

string s = CoreWebView2Environment.GetAvailableBrowserVersionString();
Console.WriteLine(s);