private async void loadUser()
        {
            var localSettings = Windows.Storage.ApplicationData.Current.LocalSettings;
            var email = (string)localSettings.Values["Email"];

            PersonService service = new PersonService();
            try {
                User = await service.getDetailsPersonAsync(email);
            }catch (NoNetworkException e)
            {
                ShowToast(e.ToString());
            }
        }
        private async void Search_Click()
        {
            if (CanExecute()) {

                PersonService service = new PersonService();

                try
                {

                    Input = FirstLetterToUpperCase(Input);

                    if (EmailChecked)
                    {
                        var person = await service.getDetailsPersonAsync(Input);
                        ListPerson[0] = person;

                    }
                    else
                    {

                        if (NameChecked)
                        {
                            ListPerson = await service.searchPersonByNameAsync(Input);
                        }
                        else
                        {
                            if (CompanyChecked)
                            {
                                ListPerson = await service.searchPersonByCompanyAsync(Input);
                            }
                            else
                            {
                                var loader = new Windows.ApplicationModel.Resources.ResourceLoader();
                                string str = loader.GetString("searchEmptyString");
                                throw new SearchFieldEmpty(str);
                            }
                        }
                    }
                    if (ListPerson.Length != 0)
                    {
                        _navigationService.NavigateTo("SearchListPage", ListPerson);
                    }
                    else
                    {
                        ShowToast("emptySearch");
                    }

                }catch (NoNetworkException e)
                {
                    ShowToast(e.ToString());
                }
                catch (SearchFieldEmpty  searchFieldEmpty)
                { 
                    ShowToast(searchFieldEmpty.toString());
                }
                catch (Exception e)
                {
                    ShowToast("search_not_found");
                }
            }
        }