private void newListAddBarButton_Click(object sender, EventArgs e)
        {
            if (textBox1.Text.Length > 0)
            {
                // Create a new shoplist
                TStore newStoreItem = new TStore
                {
                    StoreName = textBox1.Text,

                };

                App.View.AddStore(newStoreItem);

                // Return to the main page.
                if (NavigationService.CanGoBack)
                {
                    NavigationService.GoBack();
                }


            }
           
        }
        public void DeleteStore(TStore StoreForDelete)
        {

            StoreLists.Remove(StoreForDelete);

            DBShop.Stores.DeleteOnSubmit(StoreForDelete);

            DBShop.SubmitChanges();
        }
        public void AddStore(TStore newStore)
        {
            DBShop.Stores.InsertOnSubmit(newStore);

            DBShop.SubmitChanges();

            StoreLists.Add(newStore);

        }