private List <string[]> _deleteMessage(string key) { var errors = new List <string[]>(); Guid guid; if (Guid.TryParse(key, out guid)) { try { ConversationService.DeleteMessage(guid); } catch (Exception ex) { errors.Add(new[] { "Delete error.", ex.Message.Replace("'", "\\'") }); } } else { errors.Add(new[] { "Guid error.", key }); } return(errors); }