public async Task GetOrderInvoice()
        {
            var Wait = UserDialogs.Instance.Loading("Wait..", Cancel(), "Cancel", true, MaskType.Black);

            Wait.Show();
            try
            {
                JObject result = await _IAllDataServices.GetAllInvoiceOrder();

                if (result != null)
                {
                    string type = result["Type"].ToString();

                    if (type == "1")
                    {
                        _OrderMaster_Class_List = JsonConvert.DeserializeObject <ObservableCollection <OrderMaster_Class> >(result["Result"].ToString());
                        if (_OrderMaster_Class_List.Count == 0)
                        {
                            await App.Current.MainPage.DisplayAlert("Oops!", "Order Invoice Not Found", "Ok");

                            ShowOrderInvoice.IsVisible = false;
                        }
                        else
                        {
                            ShowOrderInvoice.IsVisible = true;

                            OrderMasterClassList.ItemsSource = _OrderMaster_Class_List;
                            MsgResult.IsVisible = false;
                            MsgResul.IsVisible  = false;
                        }
                    }
                    else
                    {
                        await App.Current.MainPage.DisplayAlert("Error!", (string)result["ResponseMessage"], "Ok");
                    }
                }
            }
            catch (Exception ee)
            {
                await App.Current.MainPage.DisplayAlert("Error!", ee.Message, "Ok");
            }
            Wait.Dispose();
        }