public MainPageViewModel()
 {
     SendLetterCommand = new Command(async() =>
     {
         _ = message.AddMessage(new Models.SantaLetter
         {
             KidName    = this.KidsName,
             LetterText = this.LetterText
         });
         await Application.Current.MainPage.Navigation.PushAsync(new ResultsPage(KidsName, LetterText));
     });
 }