private void WriteDataSetToXml(string reportOutPutPath, string fileName, DataSet dsReportDate) { string filePath = Path.Combine(reportOutPutPath, fileName); if (File.Exists(filePath)) { File.Delete(filePath); } MemoryStream ms = new MemoryStream(); dsReportDate.WriteXml(ms); File.WriteAllBytes(filePath, CompressionUtil.CompressZipFile(ms.ToArray(), Path.GetFileNameWithoutExtension(fileName) + ".xml")); }