Debug C# Windows CE QR Code App

I'm seeking an experienced C# developer to debug my Windows CE application, which is designed to compare and match two QR Codes. Currently, the application works when I add just one QR code, but I encounter an error when attempting to add more than one. I need this fixed so the application can accept unlimited additional QR codes until it matches the quantity of the other.

Ideal Skills and Experience:
- Strong proficiency in C# programming
- Experience with Windows CE application development
- Debugging skills to identify and fix runtime errors
- Understanding of QR code scanning and comparison systems

Please refer to the attached photos for the specific error messages I am encountering.

note:
The original freelancer is no longer available in this site and i can no longer contact him., therefore i am Looking for a new freelancer.