How to pass custom fields to Acumatica endpoint?

Hi,

Thanks all. 

I mean how to pass these new fields to the endpoint. But I managed to send them this way.

var customFields = new Dictionary<string, CustomField>
{
    { "UsrFlag", new CustomIntField { Value = 0 } }

};

Document.Details.Add(new PurchaseOrderDetail
{
    WarehouseID = siteId,
    InventoryID = "",
    OrderQty = 0m,
    Requested = DateTime.Now,
    UnitCost = 0m,
    UOM = "",
    Note = "",
    Custom = new Dictionary<string, Dictionary<string, CustomField>> { { "Transactions", customFields  } },
    OrderType = "RO"                        
});