kev/Drawer/AI/App.axaml.cs

using Avalonia;
using Avalonia.Data.Core.Plugins;
using Avalonia.Markup.Xaml;
using Microsoft.Extensions.DependencyInjection;

namespace AI
{
    public partial class App : Application
    {
        public IServiceProvider? ServiceProvider { get; private set; }

        public override void Initialize()
        {
            AvaloniaXamlLoader.Load(this);
        }

        public override void OnFrameworkInitializationCompleted()
        {
            // Line below is needed to remove Avalonia data validation.
            // Without this line you will get duplicate validations from both Avalonia and CT
            BindingPlugins.DataValidators.RemoveAt(0);
            var collection = new ServiceCollection();
            collection.AddCommonServices();
            var services = collection.BuildServiceProvider();
            ServiceProvider = services;

            base.OnFrameworkInitializationCompleted();
        }
    }
}