c# - Removing XML node -

i have got yet task not able accomplish: supposed parse xml this site, remove nodes don't have "video" in name , save xml file. have no problems reading , writing, removing makes me difficulties. have tried node -> parent node -> child node work-aroud, did not seem useful:

static void main(string[] args)     {         using (webclient wc = new webclient())         {             string s = wc.downloadstring("http://feeds.bbci.co.uk/news/health/rss.xml");             xmlelement tbr = null;             xmldocument xml = new xmldocument();             xml.loadxml(s);              foreach (xmlnode node in xml["rss"]["channel"].childnodes)             {                 if (node.name.equals("item") && node["title"].innertext.startswith("video"))                 {                     console.writeline(node["title"].innertext);                 }                 else                 {                     node.parentnode.removechild(node);                 }             }              xml.save("newxmldoc.xml");             console.writeline("\ndone...");              console.read();         }     } 

i have tried removeall method, not work well, because removes nodes not satisfying "video" condition.

//same code above, else statement changed else {    node.removeall(); } 

could me, please?

i find linq xml easier use

var xdoc = xdocument.load("http://feeds.bbci.co.uk/news/health/rss.xml");  xdoc.descendants("item")     .where(item => !item.element("title").value.startswith("video"))     .tolist()     .foreach(item=>item.remove());  xdoc.save("newxmldoc.xml"); 

you can use xpath

foreach (var item in xdoc.xpathselectelements("//item[not(starts-with(title,'video:'))]")                          .tolist()) {     item.remove();              }