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Gets the "PostalCode" field in the signature details dialog.
Use this property to read the postal code stored in the signature metadata returned by Details.
string PostalCode { get; }
ReadOnly Property PostalCode As String
workbook.Open(GetSignedWorkbookStream());
ISignature signature = workbook.Signatures[0];
IReadOnlySignatureDetails details = signature.Details;
string postalCode = details.PostalCode;