convert data in a database table into XML file

string Filename = "FileName";
System.IO.FileInfo fInfo = new FileInfo(path + "\\" + Filename + ".xml");
   if (dirInfo.Exists)
            {
                if (fInfo1.Exists)
                    fInfo1.Delete();
            }
            else
            {
                dirInfo = new DirectoryInfo(path);
                dirInfo.Create();
            }


 dataSet.WriteXml(path + "\\NewXml.xml", XmlWriteMode.WriteSchema);