Parse XML.ps1

$xml = [xml]@'
 <Users> 
 <User Name="Foo"> 
 <Friends> 
 <Friend Name="Bar"/> 
 </Friends> 
 </User> 
 <User Name="Foo2" /> 
 <User Name="Foo3"> 
 <Friends> 
 <Friend Name="Bar"/> 
 </Friends> 
 </User> 
 </Users> 
'@

Select-Xml '//User[contains(Friends/Friend/@Name, "Bar")]' $xml |%{$_.Node.Name}