# Code Contracts

Skill · Software Development and Engineering Practices

Canonical page: https://career.thegoodapps.co/skills/code-contracts

Code Contracts is a programming technique and, in the .NET ecosystem, a specific Microsoft library (System.Diagnostics.Contracts) for expressing preconditions, postconditions, and invariants directly in code. Developers use them to formally document and enforce assumptions about method behavior, enabling static verification and runtime checking to catch bugs earlier. This design-by-contract approach improves code reliability and serves as executable documentation for APIs.

Related skills: [C#](https://career.thegoodapps.co/skills/c), [.NET](https://career.thegoodapps.co/skills/net), [Unit Testing](https://career.thegoodapps.co/skills/unit-testing)

## Open roles requiring Code Contracts (0)

None of the roles we have read name this skill yet. A large share of the visible corpus has not been parsed for skills, so this is at least as likely to be our backlog as the market's verdict.