SmartBlogLibraries 2.1.0 comment controller

using System;
using System.Collections.Generic;
using System.ComponentModel.DataAnnotations;
using System.Linq;
using System.Net.Mail;
using System.Text;
using System.Web;
using System.Web.Mvc;
using Umbraco.Web.Mvc;
using umbraco.BusinessLogic;
using umbraco.cms.businesslogic.web;
using System.Xml;

namespace SmartBlogLibraries.Controllers
{
    /// <summary>
    /// Comment form controller deals with uBlogsy comment forms.
    /// </summary>
    public class CommentFormSurfaceController : SurfaceController
    {
        /// <summary>
        /// Submits a SmartBlog comment to be saved in umbraco.
        /// </summary>
        [HttpPost]
        [Obsolete("New SmartBlog comment forms are posted via ajax, this should not be used!", false)]
        public ActionResult SubmitSmartBlogComment(Models.SmartBlogCommentFormModel model)
        {
            //model not valid, do not save, but return current umbraco page
            if (!ModelState.IsValid)
            {
                return CurrentUmbracoPage();
            }

            // Create the comment and add then data then publish it
            Dictionary<string, object> properties = new Dictionary<string, object>() {
                    {"name", model.Name},
                    {"email", model.Email},
                    {"website", Server.HtmlEncode(model.Website)},
                    {"message", Server.HtmlEncode(model.Comment)}
                };

            Helpers.Cms.CreateContentNode(Server.HtmlEncode(model.Name), "Comment", properties, CurrentPage.Id);

            XmlDocument document = new XmlDocument();
            document.Load(AppDomain.CurrentDomain.BaseDirectory + "/config/SmartBlog.config");

            if (!string.IsNullOrEmpty(document.GetElementsByTagName("moderatorCommentEmail")[0].InnerText))
            {
                StringBuilder body = new StringBuilder();
                body.AppendLine("This is an automated message, please do not reply.");
                body.AppendLine();
                body.AppendLine("---------------------------------------------------");
                body.AppendLine();
                body.AppendLine("Text is as follows:");
                body.AppendLine();
                body.AppendLine("Name: " + model.Name);
                body.AppendLine("Email: " + model.Email);
                body.AppendLine("Website: " + model.Website);
                body.AppendLine("Comment: " + model.Comment);
                body.AppendLine();
                body.AppendLine("Regards,");
                body.AppendLine("Support");

                SmartBlogLibraries.Helpers.Mailing.SendEmail(document.GetElementsByTagName("moderatorCommentEmail")[0].InnerText,
                    "support@"+SmartBlogLibraries.Helpers.Http.domain,
                    "New Comment - " + System.Web.HttpContext.Current.Request.ServerVariables["HTTP_HOST"],
                    body.ToString(),
                    model.Email);
            }

            // Add message to the page
            TempData.Add("SubmissionMessage", "Your comment was successfully added.");

            // Redirect to current page to clear the form
            return RedirectToCurrentUmbracoPage();

            // Redirect to specific page
            //return RedirectToUmbracoPage(2525);
        }
    }
}