public void SaveUpdatedCustomer(Customer cust)
 {
     using (var context = new CustomerContext())
     {
         context.Entry(cust).State = EntityState.Modified;
         context.SaveChanges();
     }
 }
 public void DeleteCustomer(int id)
 {
     using (var context = new CustomerContext())
     {
         var cust = context.Customers .Find (id);
         context.Entry(cust).State = EntityState.Deleted;
         context.SaveChanges();
     }
 }
        public void SaveUpdatedOrder(Order order, int custId)
        {
            using (var context = new CustomerContext())
            {
                var orderFromDb =
                    context.Orders.Include(n => n.Customer).FirstOrDefault(o => o.Id == order.Id);
                context.Entry(orderFromDb).CurrentValues.SetValues(order);
                context.SaveChanges();

            }
        }