C# - How To Use XPath To Link My XML Document

Do I have to use XPath to link my XML document to a repeater or is there another way. here is my some of my code.

first page loop through data and store as XML:

public virtual void Button_Click(object sender, EventArgs args)
{
TableControl recControls = (TableControl)this.Page.FindControlRecursively("TableControl");
if (recControls != null)
{
TableControlRow[] rows = recControls.GetSelectedRecordControls();
this.Page.Session["RegistrationTableControl"] = rows;
// create XML writer to
using(System.Xml.XmlWriter writer = System.Xml.XmlWriter.Create(@"c: emp

[Code]....

I have take the XML data and place them in page 2 become the data source of the repeater.