tracingService.Trace("Retrieving Order");
//retrieve the entity order as the input Entity
//get both the copies of the entity, and get the updated fields from the new one
var entity = (Entity)context.InputParameters["Target"];
var oldEntity = Helpers.ActualEntity(new EntityReference("salesorder", entity.Id), service);

tracingService.Trace("Before cast");
//Early bound entity
var order = new salesorder(entity);
var oldOrder = new salesorder(oldEntity);


//if the orderprice is not locked return
if ((order.ispricelocked == false) || (oldOrder.ispricelocked == false))
    return;
else
//if the orderprice is locked, unlock it
{
    var req = new UnlockSalesOrderPricingRequest();
    req.SalesOrderId = order.Id;
    var resp = (UnlockSalesOrderPricingResponse)service.Execute(req);
}

var Order = new salesorder(entity);

Order.Id is null or Guid.Empty