private async void TestList_ItemSelected(object sender, SelectedItemChangedEventArgs e)
        {
            string testFile = e.SelectedItem as string;
            string testURL  = "https://raw.githubusercontent.com/garciart/TestMate/master/Tests/" + testFile;

            try
            {
                byte[] returnedBytes = await AppFunctions.DownloadFileAsync(testURL);

                File.WriteAllBytes(String.Format("{0}/{1}", Constants.AppDataPath, testFile), returnedBytes);
                await this.DisplayAlert("Test Mate", AppResources.DownloadSuccessMessage, "OK");

                OnAppearing();
                // await Application.Current.MainPage.Navigation.PopAsync();
            }
            catch (Exception ex)
            {
                await this.DisplayAlert("Test Mate", String.Format(AppResources.DownloadErrorMessage, ex.Message), "OK");
            }
        }
        /// <summary>
        ///
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private async void UpdateDatabaseButton_Clicked(object sender, EventArgs e)
        {
            bool answer = await DisplayAlert("Quick Meds", AppResources.UpdateConfirm, AppResources.ButtonYes, AppResources.ButtonNo);

            if (answer)
            {
                string databaseFile = "QuickMeds.db";
                string databaseURL  = "https://raw.githubusercontent.com/garciart/QuickMeds/master/Database/" + databaseFile;
                try {
                    byte[] returnedBytes = await AppFunctions.DownloadFileAsync(databaseURL);

                    File.WriteAllBytes(string.Format("{0}/{1}", Constants.AppDataPath, databaseFile), returnedBytes);
                    await DisplayAlert("Quick Meds", AppResources.DownloadSuccessMessage, "OK");

                    await Application.Current.MainPage.Navigation.PopAsync();
                }
                catch (Exception ex) {
                    await DisplayAlert("Quick Meds", string.Format(AppResources.DownloadErrorMessage, ex.Message), "OK");
                }
            }
        }