WPF

// Sort actions and statuses by time
if (treeAdditionalInfo.Items.Count != 0)
{
  foreach (TreeViewItem subsystemNodeItem in treeAdditionalInfo.Items)
  {
    foreach (TreeViewItem formNodeItem in subsystemNodeItem.Items)
    {
      formNodeItem.Items.SortDescriptions.Add(new System.ComponentModel.SortDescription("Tag",
        System.ComponentModel.ListSortDirection.Ascending));
    }
  }
}

backgroundWorker.DoWork += backgroundWorker_DoWork;

private void backgroundWorker_DoWork(object sender, DoWorkEventArgs e)

// Return the result.
e.Result = ??;

void client_GetDataCompleted(object sender, WinService.GetDataCompletedEventArgs e)

musefan wrote:

can you do a version that explains why code behind in a WPF application View is bad

private void F()
{
        // WCF service
	DatabaseServiceClient client = new DatabaseServiceClient();

	// First async
        client.GetSubsystemsByTestRunIDCompleted +=
          new EventHandler<GetSubsystemsByTestRunIDCompletedEventArgs>(client_GetSubsystemsByTestRunIDCompleted);
        client.GetSubsystemsByTestRunIDAsync(testRunID);

	// I want to use lstSubsystems list returned from first async in foreach loop
        treeAdditionalInfo.Items.Clear();
        foreach (string subsystemName in lstSubsystems)
        {
          TreeViewItem subsystemItem = new TreeViewItem();
          subsystemItem.Header = subsystemName;
          subsystemItem.FontSize = 14;
          treeAdditionalInfo.Items.Add(subsystemItem);
        }

	// Second async
        List<KeyValuePair<string, List<TestLogSmall>>> lstFormsAndActions =
          client.GetFormsAndActions(testRunID).ToList();
        client.GetFormsAndActionsCompleted +=
          new EventHandler<GetFormsAndActionsCompletedEventArgs>(client_GetFormsAndActionsCompleted);
        client.GetFormsAndActionsAsync(testRunID);

        ...
}

private void client_GetSubsystemsByTestRunIDCompleted(
  object sender, GetSubsystemsByTestRunIDCompletedEventArgs e)
{
  lstSubsystems = new List<string>();
  if (e.Error == null && e.Result != null)
    lstSubsystems = e.Result;
}

private void client_GetFormsAndActionsCompleted(
  object sender, GetFormsAndActionsCompletedEventArgs e)
{
  lstFormsAndActions = new List<KeyValuePair<string, List<TestLogSmall>>>();
  if (e.Result != null)
    lstFormsAndActions = e.Result;
}

client.GetSubsystemsByTestRunIDAsync(testRunID);

client.GetFormsAndActionsAsync(testRunID);