windows phone 8 - ContextMenu selects old item -

so situation. have longlistselector shows data (say, list of cars):

    <phone:longlistselector x:name="list" itemssource="{binding carlist}">                         <phone:longlistselector.itemtemplate>                             <datatemplate>                                 <stackpanel>                                         <toolkit:contextmenuservice.contextmenu>                                         <toolkit:contextmenu>                                             <toolkit:menuitem click="deletemenuitem_click" header="delete"/>                                         </toolkit:contextmenu>                                     </toolkit:contextmenuservice.contextmenu>                                     <textblock text="{binding sometext}">                                 </stackpanel>                             </datatemplate>                         </phone:longlistselector.itemtemplate> </phone:longlistselector> 

and how handle deletion:

   private void deletemenuitem_click(object sender, routedeventargs e)         {             car data = (sender menuitem).datacontext car;                   using (var db = new sqliteconnection(app.dbpath))                 {                     var existing = db.query<feed>("select * cars id = " + data.id.tostring()).firstordefault();                      if (existing != null)                     {                          db.runintransaction(() =>                         {                            db.delete(existing);                          });                         app.viewmodel.loadcardata();                     }                 }         } 

now issue after deleting few, context menu starts give old selection , not update makes var existing = db.query<feed>("select * cars id = " + data.id.tostring()).firstordefault(); return null because has been deleted database. idea how fix this?

probably this issue.

private void contextmenu_unload(object sender, routedeventargs e) {     contextmenu conmen = (sender contextmenu);     conmen.clearvalue(frameworkelement.datacontextproperty); }