Urgent: C# Hex To Binary Conversion

I'm in urgent need of a C# developer to integrate a hex to binary conversion functionality into an existing application.

Key Requirements:
- The conversion should be seamless and efficient.
- The integration should not interfere with the application's existing functionalities.
- The code should be properly documented.

Ideal Candidate:
- Proficient in C# with prior experience in similar conversions.
- Familiarity with integrating new features into existing applications.
- Strong understanding of binary and hex conversions.

This project is of the utmost urgency, so I need a freelancer who can start immediately and deliver results in a timely manner.