protected void Discover_Click(object Source, EventArgs e)
 {
  // Specify the URL to read the discovery results from.
  string outputDirectory = DiscoDir.Text;

      DiscoveryClientProtocol client = new DiscoveryClientProtocol();
  // Use default credentials to access the files containing the discovery results.
      client.Credentials = CredentialCache.DefaultCredentials;

      try {
        DiscoveryDocument doc;
    // Read in existing discovery results.
        DiscoveryClientResultCollection results = client.ReadAll(Path.Combine(DiscoDir.Text,"results.discomap"));
      }
      catch ( Exception e2) 
      {
        DiscoveryResultsGrid.Columns.Clear();
        Status.Text = e2.Message;
      }
  // If discovery documents existed in the supplied folder, display the results in a data grid.
      if (client.Documents.Count > 0)
      PopulateGrid(client);
}