MessageBox弹出信息框

<UserControl x:Class="Silverlight20.Tip.MessageBoxDemo"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" 
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml">
    <Grid x:Name="LayoutRoot" Background="White">
        <StackPanel>
            <Button x:Name="btnMessageBox" Content="MessageBox 演示" Click="btnMessageBox_Click" Margin="5" />
            <TextBlock x:Name="lblResult" />
        </StackPanel>
    </Grid>
</UserControl>

cs:

using System;
using System.Collections.Generic;
using System.Linq;
using System.Net;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Animation;
using System.Windows.Shapes;

namespace Silverlight20.Tip
{
    public partial class MessageBoxDemo : UserControl
    {
        public MessageBoxDemo()
        {
            InitializeComponent();
        }

        private void btnMessageBox_Click(object sender, RoutedEventArgs e)
        {
            MessageBoxResult result = MessageBox.Show("信息", "标题", MessageBoxButton.OKCancel);

            lblResult.Text += result.ToString();
        }
    }
}