I can't save the record in a new/empy table of sqlserver in the entity Framework 5.0

Question

Hi guys ,
I have tried to become a database expert in Entity Framework but I can't. because I am not able to save the record in a fresh/ empty table of sql server 2008 r2 database. for that I have watched the video tutorials step by steps that how to save the record.
I followed the tutorials step by step and at the end the result is negative.
I tried a simple way given below. please some one help me that where and what I missing the.
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using EmployeesLib;
namespace EmpApplication
public partial class Form1 : Form
private EMPEntities _dbContext;
public Form1()
InitializeComponent();
private void Form1_Load(object sender, EventArgs e)
_dbContext = new EMPEntities();
var sql = _dbContext.Employees;
this.employeeBindingSource.DataSource = sql.ToList();
private void employeeBindingNavigatorSaveItem_Click(object sender, EventArgs e)
this.Validate();
_dbContext.SaveChanges();
I have used datagrid addid a row by Click Add button on the NavigationBindingsource entered an employee name
and clicking the save button on the NavigationBindingSource. When I am restarting the application I nothing founding on the Datagrid I am saving before.
below is the Connection String in the App.config file both in the project.
APP.CONFIG connection string
    <add name="EMPEntities" connectionString="metadata=res://*/EmpModal.csdl|res://*/EmpModal.ssdl|res://*/EmpModal.msl;provider=System.Data.SqlClient;provider connection string=&quot;data source=(local);initial catalog=Inventory;integrated
security=True;MultipleActiveResultSets=True;App=EntityFramework&quot;" providerName="System.Data.EntityClient" />

Answer 1

humm, I falling the ball to the batsman(sqlserver) but it getting "NOBALL" in response(not saving). Ok it my be problem in visual studio I am struggling to remove my operating System, VS2013 and sql server, by reinstalling it might works.
because i havent any other computer where these application are installed for the test.
If you create and send me a small project that contain minimum of two columns of table( in sql server ) which can saving new data from datagrid so i will thankfull of you.
it is just for confirmation that either the problem is in OS or VS.
I doubt that any of it has anything to do with the issue. If you think it does, then you can post to the forums.
https://social.msdn.microsoft.com/Forums/vstudio/en-US/home?forum=vssetup
https://social.msdn.microsoft.com/Forums/sqlserver/en-US/home?category=sqlserver
I think you are riding a bad horse (that tutorial) you are using, and you need to change horses. I think the 'modified' state is not being rasied on the entity bound to the grid when it has changed, and EF is not going save any entity that's not in a modified
state.