gistfile1.txt

[AcceptVerbs("PATCH")]
public HttpResponseMessage PatchOrder(int id, Delta<Order> deltaOrder)
{
    using (DBOrderEntities objContext = new DBOrderEntities()) {
      var order = objContext.Orders.SingleOrDefault(o => o.ID  == id);
      if (order == null)
      {
          throw new HttpResponseException(HttpStatusCode.NotFound);
      }
      deltaOrder.Patch(order);
      objContext.SaveChanges();                
    }
    return Request.CreateResponse(HttpStatusCode.NoContent);
}