przykładowy kod jaki nie działa, chodzi o to ,że VS zachowuje się jakby nie dodał przestrzeni nazw Windows.UI.Popups, używam VS 2015 community
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Data;
using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Imaging;
using System.Windows.Navigation;
using System.Windows.Shapes;
using Windows.UI.Popups;
namespace WpfApplication3
{
/// <summary>
/// Interaction logic for MainWindow.xaml
/// </summary>
public partial class MainWindow : Window
{
public MainWindow()
{
InitializeComponent();
}
private void Button_Click(object sender, RoutedEventArgs e)
{
AAA();
}
private async void AAA()
{
MessageDialog dialog = new MessageDialog("aaaa");
await dialog.ShowAsync();
}
}
}