How do I Reply a Comment So it can capture the comment - asp.net-mvc-4

Question

Please Guys, I have a forum and I want users to be able to reply comments so that the reply would appear with the comment.
This is what I have:
public ActionResult Quote(int? id)
{
var user = User.Identity.Name;
var userId = WebSecurity.CurrentUserId;
//var userId = db.UserProfiles.FirstOrDefault(x => x.UserName == user).UserId;
if (User.Identity.Name == null)
{
return RedirectToAction("Login", "Account");
}
if (id == null)
{
return RedirectToAction("topics", "forum");
}
//var p = db.Posts.FirstOrDefault(x => x.PostId == id.Value);
var post = db.Posts.Find(id.Value);
var comment = db.UserComments.FirstOrDefault();
var usercomment = db.UserComments.Find(comment.UserCommentId);
if (usercomment == null)
{
return RedirectToAction("topics");
}
return View(new Quote { UserId = WebSecurity.CurrentUserId, PostId = id.Value, UserCommentId = usercomment.UserCommentId });
}
[HttpPost]
[ValidateAntiForgeryToken]
public ActionResult Quote(Quote quote, int id = 0)
{
if (ModelState.IsValid)
{
if (Request.Files.Count > 0)
{
System.Random randomInteger = new System.Random();
int genNumber = randomInteger.Next(1000000);
HttpPostedFileBase file = Request.Files[0];
if (file.ContentLength > 0 && file.ContentType.ToUpper().Contains("JPEG") || file.ContentType.ToUpper().Contains("PNG") || file.ContentType.ToUpper().Contains("JPG"))
{
WebImage img = new WebImage(file.InputStream);
if (img.Width > 500)
{
img.Resize(width: 500, height: 400, preserveAspectRatio: true, preventEnlarge: true);
}
if (img.Height > 700)
{
img.Resize(width: 500, height: 400, preserveAspectRatio: true, preventEnlarge: true);
}
string fileName = Path.Combine(Server.MapPath("~/Uploads/"), Path.GetFileName(genNumber + file.FileName));
img.Save(fileName);
if (fileName == null)
{
ViewBag.image = "True";
}
quote.QuoteFile = fileName;
}
}
var user = WebSecurity.CurrentUserId;
//var userId = db.UserProfiles.FirstOrDefault(a => a.UserId == user);
db.Quotes.Add(quote);
quote.QuotedBy = User.Identity.Name;
var post = db.Quotes.Include(f => f.Posts).Where(x=>x.UserCommentId == quote.UserCommentId).OrderByDescending(s => s.QuoteId);
quote.DateQuoted = DateTime.Now;
db.SaveChanges();
return RedirectToAction("topics", "forum", new { id = quote.PostId});
}
return View(quote);
}
public ActionResult _Quote(int id = 0)
{
//var comment = db.UserComments.FirstOrDefault(x => x.PostId == id);
var user = WebSecurity.CurrentUserId;
var comments = db.Quotes.Where(x => x.PostId == id).ToList();
//var quotes = db.UserComments.Where(x => x.PostId == id).ToList();
var p = new UserComment();
p.DateUserCommented = DateTime.Now;
DateTime dt = Convert.ToDateTime(p.DateUserCommented);
string strDate = dt.ToString("dd MMMM yyyy - hh:mm tt");
ViewBag.p = strDate;
ViewBag.data = comments;
return PartialView(comments);
}