/// <summary>
 /// Gets all employees.
 /// </summary>
 /// <returns>a list of Employees</returns>
 public IEnumerable<Employee> GetAllEmployees()
 {
     using (var context = new NorthwindEntities(GetEntityConnection()))
     {
         return (from item in context.Employees
                 select item).ToList();
     }
 }
 public IEnumerable<Customer> GetAllCustomers()
 {
     Thread.Sleep(500);
     using (var context = new NorthwindEntities(GetEntityConnection()))
     {
         return (from item in context.Customers
                 select item).ToList();
     }
 }
        /// <summary>
        /// Gets the orders from customer.
        /// </summary>
        /// <param name="customerId">The customer id.</param>
        /// <returns></returns>
        public IEnumerable<Order> GetOrdersFromCustomer(string customerId)
        {
            var orders = new List<Order>();
            using (var context = new NorthwindEntities(GetEntityConnection()))
            {
                context.ContextOptions.LazyLoadingEnabled = false;

                orders = (from item in context.Orders
                          where item.CustomerID.Equals(customerId)
                          select item).ToList();
            }
            return orders;
        }