HelloItQuantumReleaseVersion/HelloItQuantum/App.axaml.cs

using Avalonia;
using Avalonia.Controls.ApplicationLifetimes;
using Avalonia.Markup.Xaml;
using HelloItQuantum.ViewModels;
using HelloItQuantum.Views;

namespace HelloItQuantum
{
	public partial class App : Application
	{
		public override void Initialize()
		{
			AvaloniaXamlLoader.Load(this);
        }

		public override void OnFrameworkInitializationCompleted()
		{
			if (ApplicationLifetime is IClassicDesktopStyleApplicationLifetime desktop)
			{
				desktop.MainWindow = new MainWindow
				{
					DataContext = new MainWindowViewModel(),
				};
			}

			base.OnFrameworkInitializationCompleted();
		}
	}
}