Deleting a Node Thats selected in listview and delete it from the XML file

[WarriorCatsBiggestFan]

I want to ask if its possible and have some information or a sample code for next problem i got.I have made a look a like adressbook with some extra functions thats working perfect.But one thing isnt that perfect.I select a NAME from my LISTVIEW and press my button REMOVE it deletes the name from my listview. But everything into the listview is saved into an xml file. Now i cant figure it out how to delete it from the xml file to.Attention, its a selected item not a rondom name or what els.P.S : srry for my bad english !Greets