title: Error DownloadStringCompletedEventHandler
body: <p>i don't understand where is the error ...</p>
  
  <pre><code>using System.Xml.Linq;
  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;
  using Microsoft.Phone.Controls;
  
  
  namespace xmldow
  {
      public partial class MainPage : PhoneApplicationPage
      {
          // Constructor
          public MainPage()
          {
              InitializeComponent();
          }
  
          private void clickBott(object sender, RoutedEventArgs e)
          {
              WebClient client = new WebClient();
              client.DownloadStringCompleted += new DownloadStringCompletedEventHandler(client_DownloadStringCompleted);
              client.DownloadStringAsync(new Uri("http://example.net/ddd/my.xml"));
  
          }
  
          void client_DownloadStringCompleted(Object sender, DownloadStringCompletedEventHandler e)
          {
              throw new NotImplementedException();
  
  
          }
      }
  }
  </code></pre>
  
  <p>This is the error:</p>
  
  <blockquote>
    <p>Error  1   No overload for 'client_DownloadStringCompleted' matches delegate 'System.Net.DownloadStringCompletedEventHandler'</p>
  </blockquote>
  
  <p>Thank</p>