title: How to set property value of type 'System.Xml.Linq.XElement' to TextBox.Text?
body: <p>I have Linq object which has one field of type 'System.Xml.Linq.XElement'. When bound to Gridview this XML is properly displayed as text. However, when I try to edit that row and update Linq object I get error:</p>
  
  <p>Cannot convert value of parameter 'CustomData' from 'System.String' to 'System.Xml.Linq.XElement'.</p>
  
  <p>What is the easiest way to enable editing of XML doc as text and returning it back with row update without this error?</p>