What is needed for ActivatorUtilities.CreateInstance to work with .NET Native?

[gewarren]

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Issue moved from dotnet/docs#18729

• Please respond to @mc0re.

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From @mc0re on Monday, June 1, 2020 5:47:26 PM

The following code runs fine without Native compilation, but fails with it. What do I miss?

var services = new ServiceCollection();
services
    .AddAutoMapper(typeof(DtoMappingProfile))
    .AddLogging(configure => configure.AddSerilog(dispose: true))
    .AddSingleton<IHashCalculator, HashCalculator>()
    .AddSingleton<IMyHttpClient, MyHttpClient>()
    .AddSingleton<IPropertySet>(ApplicationData.Current.LocalSettings.Values)
    ;

// This is a field in the page class
mServices = services.BuildServiceProvider();
ActivatorUtilities.CreateInstance<AuthViewModel>(mServices)

AuthViewModel has the following contructor:

public AuthViewModel(IMyHttpClient client, IPropertySet settings)

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Document Details

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• ID: 010e4a46-847d-169c-0945-4c81eb073fa7
• Version Independent ID: 1fee9ab9-4ca3-0c4e-0c52-e7be3ea3e62d
• Content: APIs That Rely on Reflection - UWP applications
• Content Source: windows-apps-src/dotnet-native/apis-that-rely-on-reflection.md
• Product: uwp
• Technology: platform
• GitHub Login: @mcleanbyron
• Microsoft Alias: mcleans

[gewarren]

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Issue moved from dotnet/docs#18729

• Please respond to @mc0re.

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From @mc0re on Monday, June 1, 2020 6:50:36 PM

I figured by trial and error that replacing IPropertySet with its parent class ApplicationDataContainer solves the issue. So the approach that can run is:

    .AddSingleton<ApplicationDataContainer>(ApplicationData.Current.LocalSettings)

and change the AuthViewModel constructor accordingly.
But then I can't make any test case for AuthViewModel, as I can't really instantiate a test version of ApplicationDataContainer.