configuring-avalonia-dependency-injection

The templates folder contains a .NET 9 AvaloniaUI project example.

```

templates/

├── AvaloniaDISample.App/ ← Avalonia Application Project

│ ├── Views/

│ │ ├── MainWindow.axaml

│ │ └── MainWindow.axaml.cs

│ ├── App.axaml

│ ├── App.axaml.cs

│ ├── Program.cs

│ ├── GlobalUsings.cs

│ └── AvaloniaDISample.App.csproj

└── AvaloniaDISample.ViewModels/ ← ViewModel Class Library (UI framework independent)

├── MainViewModel.cs

├── GlobalUsings.cs

└── AvaloniaDISample.ViewModels.csproj

```

```csharp

// App.axaml.cs

namespace MyApp;

using Avalonia;

using Avalonia.Controls.ApplicationLifetimes;

using Microsoft.Extensions.DependencyInjection;

using Microsoft.Extensions.Hosting;

public partial class App : Application

{

private IHost? _host;

public override void Initialize()

{

AvaloniaXamlLoader.Load(this);

}

public override void OnFrameworkInitializationCompleted()

{

// Create GenericHost and register services

_host = Host.CreateDefaultBuilder()

.ConfigureServices((context, services) =>

{

// Register services

services.AddSingleton();

services.AddSingleton();

services.AddTransient();

// Register ViewModels

services.AddTransient();

// Register Views

services.AddSingleton();

})

.Build();

if (ApplicationLifetime is IClassicDesktopStyleApplicationLifetime desktop)

{

desktop.MainWindow = _host.Services.GetRequiredService();

}

base.OnFrameworkInitializationCompleted();

}

}

```