Avalonia/tests/Avalonia.DesignerSupport.TestApp/App.xaml.cs

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using Avalonia.Markup.Xaml;

namespace Avalonia.DesignerSupport.TestApp
{
    public class App : Application
    {
        public override void Initialize()
        {
            AvaloniaXamlLoader.Load(this);
        }
    }
}