using Zatca.EInvoice.SDK;
using Zatca.EInvoice.SDK.Contracts.Models;

XmlDocument xml = new XmlDocument();

xml.Load(“File.xml”);

    EInvoiceSigner eInvoiceSigner = new EInvoiceSigner();         SignResult signResult = eInvoiceSigner.SignDocument(xml, CSID, PrivateKey);

xml = signResult.SignedEInvoice

//when test xml file in ``sandbox.zatca.gov.sa/TestXML
//if this Invoice Standard Valid OK
//If This Invoice Simplified Valid Error

//Valid : false

//Errors
//category : QR_CODE_ERROR
//code : hashedXml
//message : hashedXml does not match with qr code hashedXml or the hashedXml is missing
//category : SIGNATURE_ERROR
//code :invoiceSignedDataDigestValue
//message : wrong invoice hashing
//category : SIGNATURE_ERROR
//code :X509IssuerName
//message : wrong X509Issuer
//category : SIGNATURE_ERROR
//code :X509SerialNumberyour text
//message : wrong X509SerialNumber
//category : SIGNATURE_ERROR
//code :signatureValue
//message : wrong signature Value