public IHttpActionResult Delete(int id)
        {
            try
            {
                var result = _repository.DeleteExpense(id);

                if (result.Status == RepositoryActionStatus.Deleted)
                {
                    return(StatusCode(HttpStatusCode.NoContent));
                }
                else if (result.Status == RepositoryActionStatus.NotFound)
                {
                    return(NotFound());
                }

                return(BadRequest());
            } catch (Exception e)
            {
                return(InternalServerError(e));
            }
        }