public async Task <Response> AddOwner(Course course, Owner owner) { Response response = new Response(); try { response = await _repository.AddOwner(course, owner); return(response); } catch (Exception e) { StringBuilder sb = new StringBuilder(); log.Error(sb.AppendLine(e.Message).AppendLine(e.StackTrace).ToString()); response.Success = false; response.ErrorList.Add("Error while adding owner in Course."); return(response); } }