Data Binding in Silverlight combobox Control using XML

i want  combobox data bind from xml like

abc.xml file

?

 
   
   
 

 
      
 




 
      
 
 




 




in this i want to only three value :
name="KOSTENPLDomainDataSource"
name="KSTDRGERDomainDataSource"
name="PersneelDomainDataSource"

i am using this code

 XElement xml = XElement.Load("dataset.xml");
                              XElement save = xml.Elements("root").All();
                foreach (XElement element in save.Descendants("domaindatasource"))
                {
                    cmbcolumn.Items.Add(element.FirstAttribute.Value);
                }