mvvm-community-demo/MvvmCommunityApp/MainWindow.xaml.cs

using CommunityToolkit.Mvvm.DependencyInjection;
using MvvmAppCore.ViewModels;
using System.Windows;


namespace MvvmCommunityApp
{
    /// <summary>
    /// Interaction logic for MainWindow.xaml
    /// </summary>
    public partial class MainWindow : Window
    {
        public MainWindow()
        {

            InitializeComponent();

            DataContext = Ioc.Default.GetRequiredService<MainWindowViewModel>();
        }
    }
}