FluentAvalonia/samples/FASandbox/MainWindow.axaml.cs

using Avalonia;
using Avalonia.Controls;
using Avalonia.Markup.Xaml;

namespace FASandbox;

public partial class MainWindow : Window
{
    public MainWindow()
    {
        InitializeComponent();

#if DEBUG
        this.AttachDevTools();
#endif
        DataContext = new MainWindowViewModel();
    }

    private void InitializeComponent()
    {
        AvaloniaXamlLoader.Load(this);
    }
}