c# - Can't Get .NET XPathNavigator to work -
    i having problems xpathnavigator. have document bunch of "topic" elements w/o namespace in stream.   i using (expression dumbed down bare minimum, first thought expressions wrong):   xpathdocument xmldoc = new xpathdocument( stream ); xpathnavigator xml = xmldoc.createnavigator(); xpathnodeiterator iter = xml.select( "//topic" );   this doesn't work. can select */*/*  or similar , "topic" elements alright. tried running expressions in online tester , other languages , work.   question: what's wrong? have lingering suspicion has accursed namespacemanager object, causes me incredible pain every time parse document namespaces, time elements seeking don't have explicit namespace! added:   xmlnamespacemanager s = new xmlnamespacemanager( xml.nametable );    and pass 2nd argument select - no avail. how supposed add "" namespace thing/use correctly?   or, better yet, there way use xpath in .net without using horrible abomination of class...