I am not getting the CRUD method from my generated entities

Hi,

I am getting the following error :

Error 4 'PresentationLayer.AeroLionEntities1' does not contain a definition for 'FlightSchedule' and no extension method 'FlightSchedule' accepting a first argument of type 'PresentationLayer.AeroLionEntities1' could be found (are you missing a using directive or an assembly reference?) C:\Users\kgshi\documents\visual studio 2013\Projects\AeroLion\PresentationLayer\FlightScheduleEF.aspx.cs 22 35 PresentationLayer

Here's the context page ? EFAeroLion.Context.cs

//------------------------------------------------------------------------------
//
// This code was generated from a template.
//
// Manual changes to this file may cause unexpected behavior in your application.
// Manual changes to this file will be overwritten if the code is regenerated.
//
//------------------------------------------------------------------------------
namespace PresentationLayer
{
using System;
using System.Data.Entity;
using System.Data.Entity.Infrastructure;
public partial class AeroLionEntities1 : DbContext
{
public AeroLionEntities1()
: base("name=AeroLionEntities1")
{
}
protected override void OnModelCreating(DbModelBuilder modelBuilder)
{
throw new UnintentionalCodeFirstException();
}
public virtual DbSet FlightSchedules { get; set; }
}
}

And here's the page that is giving me problem.

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
namespace PresentationLayer
{
public partial class FlightScheduleEF : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
}
protected void Retrieve_button_click(object sender, EventArgs e)
{
using(AeroLionEntities1 cntx = new AeroLionEntities1())
{
var flight = cntx.FlightSchedule.FirstOrDefault(maxSeatsTextBox => m.flightId == flightIDTextBox.Text);
if(flight != null)
{
flightIDTextBox.Text = flight.flightId;
fromCityTextBox.Text = flight.fromCity;
toCityTextBox.Text = flight.toCity;
departTimeTextBox.Text = flight.departTime;
arrivalTimeTextBox.Text = flight.arrivalTime;
fareTextBox.Text = flight.fare.ToString();
maxSeatsTextBox.Text = flight.maxSeats.ToString();
}
}
}
protected void Create_click_button(object sender, EventArgs e)
{
using(AeroLionEntities1 cntx = new AeroLionEntities1())
{
FlightSchedule addFlight = new FlightSchedule();
addFlight.flightId = flightIDTextBox.Text;
addFlight.fromCity = fromCityTextBox.Text;
addFlight.toCity = toCityTextBox.Text;
addFlight.departTime = departTimeTextBox.Text;
addFlight.arrivalTime = arrivalTimeTextBox.Text;
if (fareTextBox.Text != string.Empty)
{
addFlight.fare = Convert.ToDecimal(fareTextBox.Text);
}
if (maxSeatsTextBox.Text != string.Empty)
{
addFlight.maxSeats = Convert.ToInt32(maxSeatsTextBox.Text);
}
cntx.FlightSchedules.Add();
cntx.SaveChanges();
messageLabel.Text = "New Flight Schedule added Successfully";
}
}
protected void Upate_button_click(object sender, EventArgs e)
{
using(AeroLionEntities1 cntx = new AeroLionEntities1())
{
var flight = cntx.FlightSchedule.FirstOrDefault(m => m.flight == flightIDTextBox.Text);
if(flight != null)
{
flight.flightId = flightTextBox.Text;
flight.fromCity = fromCityTextBox.Text;
flight.toCity = toCityTextBox.Text;
if (!string.IsNullOrEmpty(maxSeatsTextBox.Text))
{
flight.maxSeats = Convert.ToInt32(maxSeatsTextBox.Text);
}
if (!string.IsNullOrEmpty(fareTextBox.Text))
{
flight.fare = Convert.ToDecimal(fareTextBox;)
}
flight.arrivalTime = arrivalTimeTextBox.Text;
flight.departTime = departTimeTextBox.Text;
cntx.SaveChanges();
messageLabel.Text = "Update Successful";
}
}
}
protected void Delete_button_Click(object sender, EventArgs e)
{
using (AeroLionEntities1 cntx = new AeroLionEntities1())
{
var flight = cntx.FlightSchedule.FirstOrDefault(m => m.flightId == flightIdTextBox.Text);
if (flight != null)
{
cntx.DeleteObject(data);
cntx.SaveChanges();
ClearFields();
messageLabel.Text = "Record deleted Successfully";
}
}
}
private void ClearFields()
{
flightIDTextBox.Text = string.Empty;
fromCityTextBox.Text = string.Empty;
toCityTextBox.Text = string.Empty;
arrivalTimeTextBox.Text = string.Empty;
departTimeTextBox.Text = string.Empty;
fareTextBox.Text = string.Empty;
maxSeatsTextBox.Text = string.Empty;
}
public object data { get; set; }
}
}

My problem is that after the cntx. FlightSchedule doesn't show up but FlightSchedules show up.

Furthermore, the AddToFlightSchedule(addFlight) doesn't exist when I generated the entity framework edmx based on FlightSchedule.dbo....

cntx.AddToFlightSchedule(addFlight);

Can I know am I supposed to write my own method or it is supposed to be generated by the VS 2013 ?