private void ShowUSDTable()
 {
     if (_usd != null)
     {
         DataTableWnd dtw = new DataTableWnd(_usd, "Primary Sites Dataset [" + _usd.TableName + "]");
         dtw.ShowDialog(this);
         dtw.Dispose();
         dtw = null;
     }
 }
        private void OpenXMLFile()
        {
            openDlg.Filter = "XML Files|*.XML";
            openDlg.ShowDialog(this);
            string filename = openDlg.FileName;

            if (filename == "")
            {
                return;
            }
            DataSet ds = new DataSet();

            ds.ReadXml(filename);
            DataTableWnd dtw = new DataTableWnd(ds);

            dtw.ShowAsMDIChild(this);
        }