private void DownloadCSV()
        {
            IOUtils file = new IOUtils();
            ISdmxObjects sdmxObjects = null;
            DataTable dt = new DataTable();

            sdmxObjects = GetSdmxObjects();

            if (sdmxObjects == null)
                return;

            AddExportColumns(dt);
            PopolateDataTable(dt, sdmxObjects);

            string mySeparator = txtSeparator.Text.Trim().Equals( string.Empty ) ? ";" : txtSeparator.Text.Trim();

            file.SaveCSVFile(dt, GetFilename(), mySeparator, txtDelimiter.Text);
        }