public ActionResult Create(Blog blog)
        {
            if (ModelState.IsValid)
            {
                repo.Insert(blog);
                repo.Save();
                return RedirectToAction("Index");
            }

            return View(blog);
        }
 public void Update(Blog obj)
 {
     db.Entry(obj).State = EntityState.Modified;
 }
 public ActionResult Edit(Blog blog)
 {
     if (ModelState.IsValid)
     {
         repo.Update(blog);
         repo.Save();
         return RedirectToAction("Index");
     }
     return View(blog);
 }
 public void Insert(Blog obj)
 {
     db.Blogs.Add(obj);
 }