CategoryController

 public class CategoryController : Controller
    {
        private TodoDataContext db = new TodoDataContext();

        //
        // GET: /Category/

        public ViewResult Index()
        {
            return View(db.Categories.ToList());
        }

        //
        // GET: /Category/Details/5

        public ViewResult Details(int id)
        {
            Category category = db.Categories.Find(id);
            return View(category);
        }

        //
        // GET: /Category/Create

        public ActionResult Create()
        {
            return View();
        } 

        //
        // POST: /Category/Create

        [HttpPost]
        public ActionResult Create(Category category)
        {
            if (ModelState.IsValid)
            {
                db.Categories.Add(category);
                db.SaveChanges();
                return RedirectToAction("Index");  
            }

            return View(category);
        }
        
        //
        // GET: /Category/Edit/5
 
        public ActionResult Edit(int id)
        {
            Category category = db.Categories.Find(id);
            return View(category);
        }

        //
        // POST: /Category/Edit/5

        [HttpPost]
        public ActionResult Edit(Category category)
        {
            if (ModelState.IsValid)
            {
                db.Entry(category).State = EntityState.Modified;
                db.SaveChanges();
                return RedirectToAction("Index");
            }
            return View(category);
        }

        //
        // GET: /Category/Delete/5
 
        public ActionResult Delete(int id)
        {
            Category category = db.Categories.Find(id);
            return View(category);
        }

        //
        // POST: /Category/Delete/5

        [HttpPost, ActionName("Delete")]
        public ActionResult DeleteConfirmed(int id)
        {            
            Category category = db.Categories.Find(id);
            db.Categories.Remove(category);
            db.SaveChanges();
            return RedirectToAction("Index");
        }

        protected override void Dispose(bool disposing)
        {
            db.Dispose();
            base.Dispose(disposing);
        }
    }

DBContext

public class TodoDataContext : DbContext
    {
        public DbSet<Todo> Todo { get; set; }
        public DbSet<Category> Categories { get; set; }

        protected override void OnModelCreating(DbModelBuilder modelBuilder)
        {
            modelBuilder.Entity<Todo>()
                        .HasOptional(x => x.Category)
                        .WithMany(i => i.Todos);
            base.OnModelCreating(modelBuilder);
        }
    }

Models

public class Todo
    {
        public Todo()
        {
            this.DateCreated = DateTime.Now;
        }

        public int Id { get; set; }
        public string Title { get; set; }
        public DateTime DateCreated { get; private set; }
        public Category Category { get; set; }
        public int? CategoryId { get; set; }
    }

public class Category
    {
        public Category()
        {
            this.DateCreated = DateTime.Now;
            this.Todos = new List<Todo>();
        }

        public int Id { get; set; }
        public string Name { get; set; }
        public DateTime DateCreated { get; private set; }
        public virtual ICollection<Todo> Todos { get; set; }
    }

Todo basic page

@(Html.Telerik()
      .Grid(Model)
      .Name("Todos"))

TodoController

public class TodoController : Controller
    {
        private TodoDataContext db = new TodoDataContext();

        //
        // GET: /Todo/

        public ViewResult Index()
        {
            var todoes = db.Todoes.Include(t => t.Category);
            return View(todoes.ToList());
        }

        //
        // GET: /Todo/Details/5

        public ViewResult Details(int id)
        {
            Todo todo = db.Todoes.Find(id);
            return View(todo);
        }

        //
        // GET: /Todo/Create

        public ActionResult Create()
        {
            ViewBag.CategoryId = new SelectList(db.Categories, "Id", "Name");
            return View();
        } 

        //
        // POST: /Todo/Create

        [HttpPost]
        public ActionResult Create(Todo todo)
        {
            if (ModelState.IsValid)
            {
                db.Todoes.Add(todo);
                db.SaveChanges();
                return RedirectToAction("Index");  
            }

            ViewBag.CategoryId = new SelectList(db.Categories, "Id", "Name", todo.CategoryId);
            return View(todo);
        }
        
        //
        // GET: /Todo/Edit/5
 
        public ActionResult Edit(int id)
        {
            Todo todo = db.Todoes.Find(id);
            ViewBag.CategoryId = new SelectList(db.Categories, "Id", "Name", todo.CategoryId);
            return View(todo);
        }

        //
        // POST: /Todo/Edit/5

        [HttpPost]
        public ActionResult Edit(Todo todo)
        {
            if (ModelState.IsValid)
            {
                db.Entry(todo).State = EntityState.Modified;
                db.SaveChanges();
                return RedirectToAction("Index");
            }
            ViewBag.CategoryId = new SelectList(db.Categories, "Id", "Name", todo.CategoryId);
            return View(todo);
        }

        //
        // GET: /Todo/Delete/5
 
        public ActionResult Delete(int id)
        {
            Todo todo = db.Todoes.Find(id);
            return View(todo);
        }

        //
        // POST: /Todo/Delete/5

        [HttpPost, ActionName("Delete")]
        public ActionResult DeleteConfirmed(int id)
        {            
            Todo todo = db.Todoes.Find(id);
            db.Todoes.Remove(todo);
            db.SaveChanges();
            return RedirectToAction("Index");
        }

        protected override void Dispose(bool disposing)
        {
            db.Dispose();
            base.Dispose(disposing);
        }