ContextMenu selects old item - windows-phone-8

Question

So basically this is the situation. I have a longlistselector that shows data (say, a 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 then this is how I handle the deletion:
private void DeleteMenuItem_Click(object sender, RoutedEventArgs e)
{
Car data = (sender as MenuItem).DataContext as Car;
using (var db = new SQLiteConnection(App.DBpath))
{
var existing = db.Query<Feed>("select * from Cars where Id = " + data.Id.ToString()).FirstOrDefault();
if (existing != null)
{
db.RunInTransaction(() =>
{
db.Delete(existing);
});
App.ViewModel.loadCarData();
}
}
}
Now the issue is that after deleting few, the context menu starts to give old selection and does not update which makes var existing = db.Query<Feed>("select * from Cars where Id = " + data.Id.ToString()).FirstOrDefault(); return null obviously because it has been already deleted from database. Any idea how to fix this?

Answer 1

Probably this issue.
private void ContextMenu_Unload(object sender, RoutedEventArgs e)
{
ContextMenu conmen = (sender as ContextMenu);
conmen.ClearValue(FrameworkElement.DataContextProperty);
}