Worked on the microsoft/VFSForGit repository to address Windows path normalization and case-renaming issues in FastFetch, focusing on ensuring that case-only file and directory renames propagate correctly to disk and match standard Git checkout behavior. Tackled the limitations of Windows Directory.Move() by implementing a two-step directory rename process, which improved reliability for rename operations. Enhanced the codebase using C# and full stack development skills, updating both unit and functional tests to verify correct handling of SourcePath, delete counts, and directory operation filtering. This work strengthened the reliability of case-sensitive operations, particularly when ignoreCase is set to false during testing.