Worked on the ERGO-Code/HiGHS repository to enhance the reliability of its C# API by addressing a critical correctness issue. Focused on API development and bug fixing, the work involved correcting the argument order for the setSolution method in the C# interface to match the underlying C API. This adjustment prevents potential runtime errors and incorrect data processing, ensuring safer integration for downstream users. The solution was implemented using C# and required careful attention to API contract adherence. By stabilizing the API’s behavior, the work reduced risk for HiGHS users and laid a foundation for safer future API changes.