C # convert an xml string to dataset

/// <Summary>
/// Convert the string XML document to Dataset
/// </Summary>
/// <Param name = "xmldata"> input an XML string </param>
/// <Returns> return dataset </returns>
Public dataset convertxmltodataset (string xmldata)
{
Stringreader stream = NULL;
Xmltextreader reader = NULL;
Try
{
DataSet xmlDS = new DataSet ();
Stream = new StringReader (xmlData );
Reader = new XmlTextReader (stream );
XmlDS. ReadXml (reader );
Return xmlDS;
}
Catch (Exception ex)
{
String strTest = ex. Message;
Return null;
}
Finally
{
If (reader! = Null)
Reader. Close ();
}
}