public async Task <IActionResult> Edit(TagViewModel tagViewModel)
        {
            if (ModelState.IsValid)
            {
                var tag = new Tag()
                {
                    Id      = tagViewModel.Id,
                    Name    = tagViewModel.Name,
                    Slug    = tagViewModel.Slug,
                    Content = tagViewModel.Content,
                };
                try
                {
                    var result = await _tagServices.UpdateAsync(tag);

                    if (result)
                    {
                        return(RedirectToAction(nameof(Index)));
                    }
                }
                catch (NullReferenceException)
                {
                    return(NotFound());
                }
                catch (Exception)
                {
                    return(BadRequest());
                }
            }
            return(View(tagViewModel));
        }