Hi gopalakatla, You can store & retrieve data to xml file using dataset object. In the DataSet class, WriteXml() method which take file name as argument is used to write data as xml data to the file. Through ReadXml() method which take file name as argument is used to read or loaded xml data to DataSet object. If you want operation similar to sql or oracle i.e using query, then you have to write a separate utility class for doing query operation.