==================================================
private void WriteXMLToFile(DataSet thisDataSet) {
if (thisDataSet == null) { return; }
// Create a file name to write to.
string filename = "myXmlDoc.XML";
// Create the FileStream to write with.
System.IO.FileStream myFileStream = new System.IO.FileStream
(filename, System.IO.FileMode.Create);
// Create an XMLTextWriter with the fileStream.
System.Xml.XmlTextWriter myXMLWriter =
new System.Xml.XMLTextWriter(myFileStream, System.Text.Encoding.Unicode);
// Write to the file with the WriteXML method.
thisDataSet.WriteXml(myXMLWriter);
myXMLWriter.Close();
}