CODE EXAMPLE FOR CSHARP

message uwp c#

using Windows.UI.Xaml;
using Windows.UI.Xaml.Controls;
using Windows.UI.Xaml.Controls.Primitives;
using Windows.UI.Xaml.Data;
using Windows.UI.Xaml.Input;
using Windows.UI.Xaml.Media;
using Windows.UI.Xaml.Navigation;
using Windows.UI.Popups;
using System;

namespace App1
{
    /// <summary>   
    /// An empty page that can be used on its own or navigated to within a Frame.   
    /// </summary>   
    public sealed partial class MainPage : Page
    {
        public MainPage()
        {
            this.InitializeComponent();
        }

        private async void Button_Click(object sender, RoutedEventArgs e)
        {
            var dialog = new MessageDialog("Hi!");
            await dialog.ShowAsync();
        }
    }
}