public async Task <IActionResult> PutOrder([FromBody] Order order)
        {
            if (!ModelState.IsValid)
            {
                return(BadRequest(ModelState));
            }

            // Apply changes to context
            _context.ApplyChanges(order);

            try
            {
                // Persist changes
                await _context.SaveChangesAsync();
            }
            catch (DbUpdateConcurrencyException)
            {
                if (!_context.Orders.Any(o => o.OrderId == order.OrderId))
                {
                    return(NotFound());
                }
                throw;
            }

            // Populate reference properties
            await _context.LoadRelatedEntitiesAsync(order);

            // Reset tracking state to unchanged
            _context.AcceptChanges(order);

            //return NoContent();
            return(Ok(order));
        }