public async Task <ServiceResult <bool> > Update(int id, InfoChannelMessageCreateOrUpdateRequestViewModel viewModel)
        {
            if (id <= 0)
            {
                throw new ArgumentException("Argument should be greater than 0", nameof(viewModel));
            }

            var model = await _repository.GetSingleAsync(id);

            if (model == null)
            {
                return(ServiceResultFactory.Fail <bool>("Item not found"));
            }
            MapViewModelToModel(viewModel, model);

            var validator        = new InfoChannelMessageCreateOrUpdateRequestViewModelValidator();
            var validationResult = await validator.ValidateAsync(model);

            if (!validationResult.IsValid)
            {
                return(ServiceResultFactory.Fail <bool>(validationResult));
            }

            _repository.Update(model);
            var changes = await _repository.SaveChangesAsync();

            return(ServiceResultFactory.Success(changes > 0));
        }