codex struggles with .NET codebases - styling, formatting, whitespace

What version of Codex is running?

0.39.0

Which model were you using?

gpt-5-codex

What platform is your computer?

Microsoft Windows NT 10.0.26100.0 x64

What steps can reproduce the bug?

Have codex work on any .net framework or .net 6+ codebase, observe it consistently changes line endings, adds extra whitespace in various places (especially extra newlines at the end of files), or miss formats newly added methods/code segments (improper indentation).

What is the expected behavior?

Following the style conventions of the current file/project appropriately, keeping the line endings the same, no weird whitespace issues.

What do you see instead?

Wrongly formatted code.

Additional information

_No response_