Errors in MVC2 regarding Update, Edit, Delete options

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.Mvc;
using System.Data;
using System.Data.Entity;

namespace CRUDs.Controllers
{
public class EmployeeController : Controller
{
private CRUDsEntities db = new CRUDsEntities();
//
// GET: /Employee/

public ActionResult Index()
{
return View(db.Employees.ToList());
}

//
// GET: /Employee/Details/5

public ActionResult Details(string id = null)
{
// Employee Emp = db.Employees.Find(id);
var Emp = (from E in db.Employees where E.EmployeeId == id select E);
if (Emp == null)
{
// return HttpNotFound();
}
return View(Emp);
}

//
// GET: /Employee/Create

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

//
// POST: /Employee/Create

[HttpPost]
[ValidateAntiForgeryToken]
public ActionResult Create(Employee Emp)
{
try
{
// TODO: Add insert logic here

if (ModelState.IsValid)
{
db.Employees.Add(Emp); // ObjectSet
db.SaveChanges();
return RedirectToAction("Index");
}
}
catch
{
return View(Emp);
}
}

//
// GET: /Employee/Edit/5

public ActionResult Edit(string id = null)
{
// Employee Emp = db.Employees.Find(id);
var Emp = (from E in db.Employees where E.EmployeeId == id select E);
if (Emp == null)
{
// return HttpNotFound();
}
return View(Emp);
}

//
// POST: /Employee/Edit/5

[HttpPost]
[ValidateAntiForgeryToken]
public ActionResult Edit(Employee Emp)
{
try
{
// TODO: Add update logic here

if (ModelState.IsValid)
{
db.Entry(Emp).State = EntityState.Modified; // ObjectSet
db.SaveChanges();
return RedirectToAction("Index");
}
}
catch
{
return View(Emp);
}
}

//
// GET: /Employee/Delete/5

public ActionResult Delete(String id = null)
{
// Employee Emp = db.Employees.Find(id);
var Emp = (from E in db.Employees where E.EmployeeId == id select E);
if (Emp == null)
{
// return HttpNotFound();
}
return View(Emp);
}

//
// POST: /Employee/Delete/5

[HttpPost, ActionName("Delete")]
[ValidateAntiForgeryToken]
public ActionResult DeleteConfirmed(String id)
{
try
{
// TODO: Add delete logic here

// Employee Emp = db.Employees.Find(id);
var Emp = (from E in db.Employees where E.EmployeeId == id select E);
db.Employees.Remove(Emp); // ObjectSet
db.SaveChanges();
return RedirectToAction("Index");
}
catch
{ }
}

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