public LanguagesViewModel()
{
Title = "Languages";
Languages = new ObservableRangeCollection <Language>();
LoadLanguagesCommand = new Command(async() => await ExecuteLoadLanguagesCommand());
MessagingCenter.Subscribe <NewLanguagePage, Language>(this, "AddItem", async(obj, language) =>
{
var _language = language as Language;
Languages.Add(_language);
await DataStore.AddLanguageAsync(_language);
});
}