During November 2024, Enjieid developed an automated code fixer for the microsoft/testfx repository, focusing on migrating test cleanup logic from TestCleanup methods to the IDisposable.Dispose pattern. Leveraging C# and Roslyn Analyzers, Enjieid implemented MSTEST0021-related tooling that programmatically updates codebases, ensuring consistent and maintainable resource cleanup across test projects. The work included updating localization resources and refactoring test projects to adopt the new disposal-based approach, aligning with .NET best practices. This targeted feature reduced technical debt by consolidating cleanup logic, improved maintainability, and promoted deterministic resource management, demonstrating depth in code analysis, refactoring, and unit testing skills.