Searching & download a single file in a website

private void buttonDownloadFile_Click(object sender, EventArgs e) {     string url = @"http://www.thereforesystems.com/wp-content/uploads/2008/08/image35.png";     // Create an instance of WebClient     WebClient client = new WebClient();     // Hookup DownloadFileCompleted Event     client.DownloadFileCompleted +=    new AsyncCompletedEventHandler(client_DownloadFileCompleted);      // Start the download and copy the file to c:\temp     client.DownloadFileAsync(new Uri(url), @"c:\temp\image35.png");  }  void client_DownloadFileCompleted(object sender, AsyncCompletedEventArgs e) {     MessageBox.Show("File downloaded"); }