Techniques

You can save data using entity framework in 2 ways

The Normal way

public ActionResult Save(BlogViewModel blogViewModel)
{
    Blog blog = _dbContext.Blogs.Find(blogViewModel.Id);

    blog.Description = blogViewModel.Description;

    blog.Title = blogViewModel.Title;

    _dbContext.SaveChanges();

    return View();
}

Manually attaching entities

public ActionResult Save(Blog blog)
{
    _dbContext.Blogs.Attach(blog);
    _dbContext.Entry(blog).State = EntityState.Modified;

    _dbContext.SaveChanges();

    return View();
}

In this pattern, TEDB wont work by default. You will have to set

GlobalTrackingConfig.DisconnectedContext = true;

on application startup.