private void linkRemoveAppliances_Click(object sender, RoutedEventArgs e)
 {
     appliance = new ApplianceViewModel();
     appliance.deleteAllAppliances();
     messageBox("All Appliances Removed");
 }
        private void DropAppliancesCommandhandler(IUICommand cmd)
        {
            HistoryViewModel myHistory = null;
            var lable = cmd.Label;
            myHistory = new HistoryViewModel();
            switch (lable)
            {
                case "Yes":

                    try
                    {
                        appliance = new ApplianceViewModel();
                        appliance.deleteAllAppliances();
                        //this.Frame.Navigate(typeof(MainPage));
                    }
                    catch (Exception ex)
                    {
                        //messageBox("error " + ex.Message);
                    }
                    break;
                case "Calcel":
                    break;
                

            }
        }