Manually Showing MainWindow.xaml In App.xaml.cs (Dependency Injection)

<Application x:Class="computerComponentsTracker.App"
             xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
             xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml">

private static IServiceProvider? ServiceProvider;

protected override void OnStartup(StartupEventArgs e)
{
    var serviceCollection = new ServiceCollection();

    // Register services
    serviceCollection.AddSingleton<IAppLanguageServices, AppLanguageServices>();
    serviceCollection.AddTransient<ComponentUsage>();
    serviceCollection.AddTransient<MainWindow>();
    serviceCollection.AddTransient<Settings>();

    // Build service provider
    ServiceProvider = serviceCollection.BuildServiceProvider();

    // Manually create and show MainWindow
    var mainWindow = ServiceProvider.GetRequiredService<MainWindow>();
    mainWindow?.Show();

    base.OnStartup(e);
}