public ActionResult DeletePost(Post post)
        {
            var comments = db.Comments.Where(e => e.PostId == post.Id);
            foreach (var comment in comments)
            {
                db.Entry(comment).State = System.Data.EntityState.Deleted;
            }
            db.Entry(post).State = System.Data.EntityState.Deleted;
            db.SaveChanges();

            return RedirectToAction("Posts");
        }
        public ActionResult Post(Post post)
        {
            var user = db.Users.Where(e => e.UserName == HttpContext.User.Identity.Name).FirstOrDefault();

            post.UserId = user.Id;
            post.DateCreated = DateTime.Now;
            post.DateModified = DateTime.Now;
            db.Entry(post).State = System.Data.EntityState.Added;
            db.SaveChanges();

            return RedirectToAction("Posts");
        }
        public ActionResult EditPost(Post post)
        {
            post.DateModified = DateTime.Now;

            db.Entry(post).State = System.Data.EntityState.Modified;
            db.SaveChanges();

            return RedirectToAction("Posts");
        }