using (AdventureWorksEntities context = new AdventureWorksEntities())
{
    try
    {
        DateTime Birthdt = new DateTime(1965, 9, 26);
        DateTime Hiredt = new DateTime(2010, 1, 1);
        Contact con = new Contact { Title = "Geek", FirstName = "Scott", LastName = "Klein", 
            EmailAddress = "ScottKlein@SqlXml.com", EmailPromotion = 0, Phone = "555-55-5555", 
            PasswordHash = "", PasswordSalt = "", rowguid = System.Guid.NewGuid(), 
            ModifiedDate = DateTime.Now };
        Employee emp = new Employee { NationalIDNumber = "1234567890", LoginID = "sklein", 
            ManagerID = 1, Title = "Geek", BirthDate = Birthdt, MaritalStatus = "M", 
            Gender = "M", HireDate = Hiredt, SalariedFlag = true, VacationHours = 80, 
            SickLeaveHours = 40, CurrentFlag = true, rowguid = System.Guid.NewGuid(), 
            ModifiedDate = DateTime.Now };
        con.Employees.Add(emp);
        context.Contacts.AddObject(con);
        context.SaveChanges();
    }
    catch (Exception ex)
    {
        MessageBox.Show(ex.Message);
    }
}



----------------------------

using (AdventureWorksEntities context = new AdventureWorksEntities())
{
    try
    {
        DateTime Birthdt = new DateTime(1965, 9, 26);
        DateTime Hiredt = new DateTime(2010, 1, 1);
        Contact con = new Contact { Title = "Geek", FirstName = "Scott", LastName = "Klein", 
            EmailAddress = "ScottKlein@SqlXml.com", EmailPromotion = 0, Phone = "555-55-5555", 
            PasswordHash = "", PasswordSalt = "", rowguid = System.Guid.NewGuid(), 
            ModifiedDate = DateTime.Now };
        Employee emp = new Employee { ContactID = 19983, NationalIDNumber = "12345678901", 
            LoginID = "sklein1", ManagerID = 1, Title = "Geek", BirthDate = Birthdt, 
            MaritalStatus = "M", Gender = "M", HireDate = Hiredt, SalariedFlag = true, 
            VacationHours = 80, SickLeaveHours = 40, CurrentFlag = true, 
            rowguid = System.Guid.NewGuid(), ModifiedDate = DateTime.Now };
        context.Employees.AddObject(emp);
        context.Contacts.AddObject(con);
        context.SaveChanges();
    }
    catch (Exception ex)
    {
        MessageBox.Show(ex.Message);
    }
}

---------------------------------

using (AdventureWorksEntities context = new AdventureWorksEntities())
{
    try
    {
        DateTime Birthdt = new DateTime(1965, 9, 26);
        DateTime Hiredt = new DateTime(2010, 1, 1);
        Employee emp = new Employee { ContactID = 19983, NationalIDNumber = "12345678902", 
            LoginID = "sklein2", ManagerID = 1, Title = "Geek", BirthDate = Birthdt, 
            MaritalStatus = "M", Gender = "M", HireDate = Hiredt, SalariedFlag = true, 
            VacationHours = 80, SickLeaveHours = 40, CurrentFlag = true, 
            rowguid = System.Guid.NewGuid(), ModifiedDate = DateTime.Now };
        context.Employees.AddObject(emp);
        context.SaveChanges();
    }
    catch (Exception ex)
    {
        MessageBox.Show(ex.Message);
    }
}