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Introduction

.NET Generic Host support for Avaloniaui desktop app. Support Aot!

• Examples:

internal sealed class Program
{
    [STAThread]
    [SupportedOSPlatform("windows")]
    [SupportedOSPlatform("linux")]
    [SupportedOSPlatform("macos")]
    [RequiresDynamicCode("Calls Microsoft.Extensions.Hosting.Host.CreateApplicationBuilder()")]
    public static void Main(string[] args)
    {
        var hostBuilder = Host.CreateApplicationBuilder();

        // config IConfiguration
        hostBuilder.Configuration
            .AddCommandLine(args)
            .AddEnvironmentVariables()
            .AddInMemoryCollection();

        // config ILogger
        hostBuilder.Services.AddLogging(builder => builder.AddConsole());
        // add some services
        hostBuilder.Services.AddSingleton<ISomeService, SomeService>();

        #region app default
        RunAppDefault(hostBuilder, args);
        #endregion

        #region app without mainwindow
        //RunAppWithoutMainWindow(hostBuilder, args);
        #endregion

        #region app with serviceprovider
        //RunAppWithServiceProvider(hostBuilder, args);
        #endregion
    }

    public static AppBuilder ConfigAvaloniaAppBuilder(AppBuilder appBuilder)
    {
        return appBuilder
                    .UsePlatformDetect()
                    .WithInterFont()
                    .LogToTrace()
                    .UseReactiveUI();
    }

    [SupportedOSPlatform("windows")]
    [SupportedOSPlatform("linux")]
    [SupportedOSPlatform("macos")]
    [MethodImpl(MethodImplOptions.NoInlining | MethodImplOptions.NoOptimization)]
    private static void RunAppDefault(HostApplicationBuilder hostBuilder, string[] args)
    {
        hostBuilder.Services.AddAvaloniauiDesktopApplication<AppDefault>(ConfigAvaloniaAppBuilder);
        // build host
        var appHost = hostBuilder.Build();
        // run app
        appHost.RunAvaloniauiApplication(args);
    }

    [SupportedOSPlatform("windows")]
    [SupportedOSPlatform("linux")]
    [SupportedOSPlatform("macos")]
    [MethodImpl(MethodImplOptions.NoInlining | MethodImplOptions.NoOptimization)]
    private static void RunAppWithoutMainWindow(HostApplicationBuilder hostBuilder, string[] args)
    {
        // add avaloniaui application and config AppBuilder
        hostBuilder.Services.AddAvaloniauiDesktopApplication<AppWithoutMainWindow>(ConfigAvaloniaAppBuilder);
        // add MainWindow & MainWindowViewModelWithParams
        hostBuilder.Services.AddMainWindow<MainWindow, MainWindowViewModelWithParams>();
        // build host
        var appHost = hostBuilder.Build();
        // run app
        appHost.RunAvaloniauiApplication<MainWindow>(args);
    }

    [SupportedOSPlatform("windows")]
    [SupportedOSPlatform("linux")]
    [SupportedOSPlatform("macos")]
    [MethodImpl(MethodImplOptions.NoInlining | MethodImplOptions.NoOptimization)]
    private static void RunAppWithServiceProvider(HostApplicationBuilder hostBuilder, string[] args) 
    {
        // add avaloniaui application and config AppBuilder
        hostBuilder.Services.AddAvaloniauiDesktopApplication<AppWithServiceProvider>(ConfigAvaloniaAppBuilder);
        // add MainWindowViewModelWithParams
        hostBuilder.Services.AddSingleton<MainWindowViewModelWithParams>();
        // build host
        var appHost = hostBuilder.Build();
        // run app
        appHost.RunAvaloniauiApplication(args);
    }
}

References: Nito.Host.Wpf