sa/Stars Assistant/Views/MainWindow.axaml.cs

using Avalonia.Controls;
using Avalonia.ReactiveUI;
using System.Diagnostics;
using System;
using StarsAssistant.ViewModels;
using Avalonia.Markup.Xaml;
using ReactiveUI;
using System.Reactive.Disposables;

namespace StarsAssistant.Views;

public partial class MainWindow : ReactiveWindow<MainWindowViewModel>
{
    public MainWindow()
    {
        this.WhenActivated(

            disposables => {
                this.OneWayBind(ViewModel,
                        viewModel => viewModel.Planets,
                        view => view.PlanetsGrid.ItemsSource)
                    .DisposeWith(disposables);
                this.OneWayBind(ViewModel, 
                        vm => vm.WelcomeMessage, 
                        v => v.WelcomeText.Text)
                    .DisposeWith(disposables);
            }
        );
        
        InitializeComponent();
    }

}