How to Enforce Modular Monolith Boundaries in .NET Using Tooling Over Convention

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A modular monolith without automated boundary enforcement tends to collapse into an unstructured codebase as soon as deadlines create pressure to cut corners. A recommended approach pairs each .NET module with a public Contracts project, allowing the compiler itself to physically block unauthorized cross-module type access. Additional layers of enforcement — including NetArchTest, NDepend CQLinq, and CI quality gates — catch namespace-level violations and dependency cycles that the compiler alone cannot detect. Modules communicate through MediatR in-process events and maintain separate DbContexts with schema prefixes, keeping data and logic cleanly isolated. This structure also serves as a natural extraction seam, so migrating a module to a standalone microservice becomes a deployment change rather than an architectural redesign.

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Developer finds Zapier's app publishing process requires real coding and live test runs

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ProgrammingDEV Community ·

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ProgrammingDEV Community ·

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ProgrammingDEV Community ·

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