VB code to create ZugFerd invoice

@danrleyreis

Hello! I fully understand the requirement: you need to bridge the gap between Crystal Reports' standard output and the ZUGFeRD/EN 16931 compliance. Since Crystal Reports doesn't natively export to PDF/A-3, the core of this task is implementing a robust routine in VB.NET using libraries like iTextSharp or PDFSharp to handle the XML embedding and the metadata conversion required for German B2B standards. My Value Proposition (Budget Match): I am currently scaling my profile with high-level technical deliveries. For this reason, I am willing to match or undercut your best technical bid for this project. In exchange, I ask for your honest 5-star feedback and the possibility of a long-term partnership as your go-to expert for complex integrations. Technical Expertise: As a Senior Full-stack Developer, I have extensive experience in file manipulation and automated workflows. I can deliver a clean, modular Visual Basic routine that takes your three paths (XML, Source PDF, Output PDF) and ensures the resulting file passes the ZUGFeRD validation with 100% accuracy. Technical Question for You: Do you already have a preferred library for PDF manipulation in your Visual Studio environment (like Syncfusion or iText), or should I include the implementation of a lightweight open-source dependency in the routine? Best regards, Danrley