I offer a comprehensive solution for securely signing XML files using a PFX certificate in C#. My approach will utilize a robust C# library specifically designed for XML signature implementation, ensuring that the output remains an XML file with an embedded digital signature. This signature will comply with the XML-Signature Syntax and Processing standard.
For personal use, I will ensure the process is streamlined and user-friendly, providing a simple interface to select your PFX certificate and the XML file to be signed. The system will handle all the complexities of signing, including the management of cryptographic operations and the generation of a signature that can be verified to prove the authenticity and integrity of the XML file.
The final product will be a lightweight and efficient application tailored to your specific needs, ensuring that you can sign your XML documents with confidence and ease.