public async Task SaveTaskAsync(PackageFoodDatabase item, bool isNew)
 {
     if (isNew == true)
     {
         await MedicineDatabase.InsertAsync(item);
     }
     else
     {
         await MedicineDatabase.UpdateAsync(item);
     }
 }
 public async Task DeleteTaskAsync(PackageFoodDatabase item)
 {
     await MedicineDatabase.DeleteAsync(item);
 }