public IEnumerable<Models.Contact> GetAutoCompleteContact(string field, string prefix)
 {
     try
     {
         using (var repo = new Data.ContactsRepository())
         {
             return repo.GetAutoCompleteContact(field, prefix);
         }
     }
     catch (Exception ex)
     {
         Logger.DebugException("GetAutoCompleteContact failed", ex);
         throw;
     }
 }