Awaiting a call in an anonymous type initializer

gistfile1.cs

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

        this.Loaded += MainWindow_Loaded;
    }

    async void MainWindow_Loaded(object sender, RoutedEventArgs e)
    {
        this.DataContext = new
        {
            Tweets = (await new TwitterAnonymousClient().GetUserTimelineAsync("mabster", 50)).Result,
        };
    }
}