Keys/App/Program.cs

using Microsoft.Extensions.DependencyInjection;

namespace App;

class Program
{
    private static ServiceProvider? provider;

    static int Main()
    {
        provider = SetupServices();

        var application = Adw.Application.New("org.typomustakes.keychain", Gio.ApplicationFlags.FlagsNone);
        application.OnActivate += (sender, args) =>
        {
            var window =  new App.UI.MainWindow().Window;
            window.Application = (Adw.Application)sender;
            window.Show();
        };

        return application.RunWithSynchronizationContext(null);
    }

    private static ServiceProvider SetupServices()
    {
        var services = new ServiceCollection();
        services.AddTransient<IPasswordStoreService, PasswordStoreService>();
        return services.BuildServiceProvider();
    }
}