C# and XML spreadsheet simple question

[Irakli Lekishvi]

Hello guys
I have 1675 line Code. Want to when user click button textbox.text insert into this xml spreadsheet and then create on desktop. does it possible? how can i insert text in current xml spreadsheet row?

For Example :

   <Cell ss:StyleID="s38"/>
        <Cell ss:StyleID="s39">
          <Data ss:Type="String">ვაშლიჯვარი</Data>
        </Cell>
        <Cell ss:StyleID="s36"/>

Please help me, advice something its very important for me or give some good tutorials.

[Subin Ninan]

Read xml file in dataset using dataset.ReadXml () method and after making changes in dataset use dataset.WriteXm l() method to persist changes in xml file.