private void CloseProgressDialog()
{
if (_progressdialog != null) {
_progressdialog.Close();
_progressdialog = null;
}
}
/// <summary>
/// Shows the progress dialog.
/// </summary>
private void ShowProgressDialog(string title, int totalitems)
{
if (_progressdialog != null)
throw new ApplicationException("Progress dialog already open!");
_progressdialog = new ProgressForm();
_progressdialog.ResetDialog(title);
_progressdialog.TotalProgress.Maximum = totalitems;
_progressdialog.Show(this);
}