UI Controls Silverlight

    xmlns='http://schemas.microsoft.com/winfx/2006/xaml/presentation' 
    xmlns:x='http://schemas.microsoft.com/winfx/2006/xaml'
    xmlns:d='http://schemas.microsoft.com/expression/blend/2008' 
    xmlns:mc='http://schemas.openxmlformats.org/markup-compatibility/2006' 
    mc:Ignorable='d' 
    d:DesignWidth='640' 
    d:DesignHeight='480'>
    
        
            
            
           
    

//File: Page.xaml.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 SilverlightApplication3
{
    public partial class MainPage : UserControl
    {
        public MainPage()
        {
            InitializeComponent();
        }
        private void myButton_Click(object sender, RoutedEventArgs e)
        {
            RequestContent();
        }
        
        private void RequestContent()                                             
        {
            Uri address = new Uri("http://server.com/video2.wmv");
            WebClient webClient = new WebClient();
            webClient.OpenReadCompleted += new 
            OpenReadCompletedEventHandler(webClient_OpenReadCompleted);           
            webClient.OpenReadAsync(address);                                       
        }
        void webClient_OpenReadCompleted(object sender, OpenReadCompletedEventArgs e)                                           
        {
            myMediaElement.SetSource(e.Result);                                     
        }
    }
}