crosslangdevstudio/Views/MainWindow.axaml.cs

using System.Threading.Tasks;
using Avalonia;
using Avalonia.Controls;
using Avalonia.Platform.Storage;
using CommunityToolkit.Mvvm.Messaging;
using CrossLangDevStudio.Messages;
using CrossLangDevStudio.ViewModels;

namespace CrossLangDevStudio.Views;

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

        if (Design.IsDesignMode)
            return;

        // Whenever 'Send(new PurchaseAlbumMessage())' is called, invoke this callback on the MainWindow instance:
        WeakReferenceMessenger.Default.Register<MainWindow, NewProjectMessage>(this, static (w, m) =>
            {
                // Create an instance of MusicStoreWindow and set MusicStoreViewModel as its DataContext.
                var dialog = new NewProjectDialog
                {
                    DataContext = new NewProjectDialogViewModel()
                };
                // Show dialog window and reply with returned AlbumViewModel or null when the dialog is closed.
                m.Reply(dialog.ShowDialog<string?>(w));
            });
        WeakReferenceMessenger.Default.Register<MainWindow, GetWindowMessage>(this, static (w, m) =>
            {
                m.Reply(w);
            }
        );
       
    }
}