Worked on the diadoc/diadocsdk-csharp repository, focusing on a targeted refactor of the Universal Message (УС) components. The effort involved moving УС classes into a dedicated Diadoc.Api.DataXml.UniversalMessage namespace, using C# and leveraging skills in code refactoring and namespace management. This change improved code organization and maintainability while ensuring that existing XML serialization behavior and the external API surface remained intact. The refactor was completed in a single commit, with no functional regressions observed, and positions the Universal Message area for easier future enhancements. No bugs were fixed during this period, and the work centered on structural improvements.