async void FechaNacimiento_Tapped(object sender, System.EventArgs e)
        {
            #if __IOS__
            DependencyService.Get <IForceKeyboardDismissalService>().DismissKeyboard();
            #endif

            var result = await UserDialogs.Instance.DatePromptAsync(new DatePromptConfig
            {
                IsCancellable = true,
                CancelText    = "CANCELAR",
            });


            if (result.Ok)
            {
                FechaNacimiento.Text = String.Format("{0:dd/MM/yyyy}", result.SelectedDate);
                FechaNacimiento.Unfocus();
                DependencyService.Get <IForceKeyboardDismissalService>().DismissKeyboard();
            }
            else
            {
                FechaNacimiento.Unfocus();
                DependencyService.Get <IForceKeyboardDismissalService>().DismissKeyboard();
            }
        }