public static void LoadDB(Model type)
 {
     if (type == Model.Voc && Vocabularies == null)
     {
         SqLiteHelper.GetVocabulariesDB();
     }
     else if (type == Model.Pron && Pronunciations == null)
     {
         SqLiteHelper.GetPronunciationsDB();
     }
     else if (type == Model.Spell && Spellings == null)
     {
         SqLiteHelper.GetSpellingsDB();
     }
 }