How would you version and release a shared .NET library used by multiple services?

Package versioning for shared .NET libraries

Explains versioning and releasing shared .NET libraries or NuGet packages safely.

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For a shared .NET library, I would use clear package versioning and avoid breaking public APIs casually. Consumers should know whether a release is a patch, new feature, or breaking change. The package should have release notes and be published through a controlled pipeline. Services should update intentionally rather than automatically pulling risky versions.

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Package versioning, compatibility, release notes, consumer impact, dependency updates, and rollback thinking.

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Why this question matters
Shared libraries multiply the impact of changes. A small breaking change can affect many services.
For a shared .NET library, I would use clear package versioning and avoid breaking public APIs casually. Consumers should know whether a release is a patch, new feature, or breaking change. The package should have release notes and be published through a controlled pipeline. Services should update intentionally rather than automatically pulling risky versions.
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For example, adding a new helper method can be a minor version, but changing an existing method signature or behavior may require a major version. The trade-off is that strict versioning adds discipline, but it prevents downstream services from breaking unexpectedly. I would also keep backward compatibility where possible and give consumers a migration path.

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Publishing breaking changes as patch versions.
Letting services auto-update major package versions.
No migration notes for consumers.
Putting too much business logic into shared packages.

How would you version and release a shared .NET library used by multiple services?

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