Product: ALL Description: QBO: Reference number for the transaction. If DocNumber is not provided, and the Custom Transaction Number is set to "Off", QBO assigns a document number using the next-in-sequence algorithm for Sales transactions. Otherwise the value will remaing null. Alternatively, you can also pass in "AUTO_GENERATE" in this field to force QBO to auto-sequence the document number for Invoices, Estimates and Sales Receipt.[br /]The maximum length for DocNumber is 21 characters. The default value is an empty String. Filter support not provided for Payment. Description: QBW: The primary document number for this transaction. DocNumber is exposed to end users.[br /]If it is not provided, QuickBooks business logic will assign the document number using the "next in sequence" algorithm.[br /]Max. length is 11 characters for Payment, Bill, ItemReceipt and VendorCredit. Max. length is 20 characters for other entities. Filterable: QBO InputType: ReadWrite ValidRange: QBW: max=11 ValidRange: QBO: max=21

public string DocNumber { get; set; }