Stat.isNotAVGOrSD C# (CSharp) Method

    private bool isNotAVGOrSD(Gtk.TreeIter iter)
    {
        //except AVG and SD
        string avgOrSD = (string) store.GetValue (iter, 1);
        if(avgOrSD != Catalog.GetString("AVG") && avgOrSD != Catalog.GetString("SD")) {
            return true;
        } else {
            return false;
        }
    }