Complete .NET exercise implementation with all endpoints, tests, and documentation - #6

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robpitcher with Copilot wants to merge 3 commits into

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copilot/update-completed-solution

Commits on Jan 5, 2026

Initial plan
Copilot
committed
7a27d8c
Complete .NET exercises: add missing endpoints, tests, and documentation

Copilot
and
robpitcher
committed
1b19a07
Improve phone validation regex with reasonable max length

Copilot
and
robpitcher
committed
2fe8e5a