public async Task <IActionResult> Add(string postId, string text) { if (string.IsNullOrEmpty(text)) { return(Redirect("/Post?postId=" + postId)); } ApplicationUser user = await _userManager.GetUserAsync(HttpContext.User); Comment comment = new Comment(text); _repository.AddComment(comment, Guid.Parse(user.Id), Guid.Parse(postId)); return(Redirect("/Post?postId=" + postId)); }